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Diffstat (limited to 'simulator/opendc-workflow/opendc-workflow-service/src/main')
31 files changed, 0 insertions, 2099 deletions
diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/WorkflowService.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/WorkflowService.kt deleted file mode 100644 index d3358ef1..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/WorkflowService.kt +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service - -import io.opentelemetry.api.metrics.Meter -import org.opendc.compute.api.ComputeClient -import org.opendc.workflow.api.Job -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import org.opendc.workflow.service.scheduler.WorkflowSchedulerMode -import org.opendc.workflow.service.scheduler.job.JobAdmissionPolicy -import org.opendc.workflow.service.scheduler.job.JobOrderPolicy -import org.opendc.workflow.service.scheduler.task.TaskEligibilityPolicy -import org.opendc.workflow.service.scheduler.task.TaskOrderPolicy -import java.time.Clock -import kotlin.coroutines.CoroutineContext - -/** - * A service for cloud workflow management. - * - * The workflow scheduler is modelled after the Reference Architecture for Topology Scheduling by Andreadis et al. - */ -public interface WorkflowService : AutoCloseable { - /** - * Submit the specified [Job] to the workflow service for scheduling. - */ - public suspend fun submit(job: Job) - - /** - * Run the specified [Job] and suspend execution until the job is finished. - */ - public suspend fun run(job: Job) - - /** - * Terminate the lifecycle of the workflow service, stopping all running workflows. - */ - public override fun close() - - public companion object { - /** - * Construct a new [WorkflowService] implementation. - * - * @param context The [CoroutineContext] to use in the service. - * @param clock The clock instance to use. - * @param tracer The event tracer to use. - * @param meter The meter to use. - * @param compute The compute client to use. - * @param mode The scheduling mode to use. - * @param jobAdmissionPolicy The job admission policy to use. - * @param jobOrderPolicy The job order policy to use. - * @param taskEligibilityPolicy The task eligibility policy to use. - * @param taskOrderPolicy The task order policy to use. - */ - public operator fun invoke( - context: CoroutineContext, - clock: Clock, - meter: Meter, - compute: ComputeClient, - mode: WorkflowSchedulerMode, - jobAdmissionPolicy: JobAdmissionPolicy, - jobOrderPolicy: JobOrderPolicy, - taskEligibilityPolicy: TaskEligibilityPolicy, - taskOrderPolicy: TaskOrderPolicy - ): WorkflowService { - return WorkflowServiceImpl( - context, - clock, - meter, - compute, - mode, - jobAdmissionPolicy, - jobOrderPolicy, - taskEligibilityPolicy, - taskOrderPolicy - ) - } - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/JobState.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/JobState.kt deleted file mode 100644 index 1bb67169..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/JobState.kt +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.internal - -import org.opendc.workflow.api.Job - -public class JobState(public val job: Job, public val submittedAt: Long) { - /** - * A flag to indicate whether this job is finished. - */ - public val isFinished: Boolean - get() = tasks.isEmpty() - - internal val tasks: MutableSet<TaskState> = mutableSetOf() - - override fun equals(other: Any?): Boolean = other is JobState && other.job == job - - override fun hashCode(): Int = job.hashCode() -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskState.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskState.kt deleted file mode 100644 index c3ce1492..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskState.kt +++ /dev/null @@ -1,83 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.internal - -import org.opendc.compute.api.Server -import org.opendc.workflow.api.Task - -public class TaskState(public val job: JobState, public val task: Task) { - /** - * The moment in time the task was started. - */ - public var startedAt: Long = Long.MIN_VALUE - - /** - * The moment in time the task was finished. - */ - public var finishedAt: Long = Long.MIN_VALUE - - /** - * The dependencies of this task. - */ - public val dependencies: HashSet<TaskState> = HashSet() - - /** - * The dependents of this task. - */ - public val dependents: HashSet<TaskState> = HashSet() - - /** - * A flag to indicate whether this workflow task instance is a workflow root. - */ - public val isRoot: Boolean - get() = dependencies.isEmpty() - - public var state: TaskStatus = TaskStatus.CREATED - set(value) { - field = value - - // Mark the process as terminated in the graph - if (value == TaskStatus.FINISHED) { - markTerminated() - } - } - - public var server: Server? = null - - /** - * Mark the specified [TaskView] as terminated. - */ - private fun markTerminated() { - for (dependent in dependents) { - dependent.dependencies.remove(this) - - if (dependent.isRoot) { - dependent.state = TaskStatus.READY - } - } - } - - override fun equals(other: Any?): Boolean = other is TaskState && other.job == job && other.task == task - - override fun hashCode(): Int = task.hashCode() -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskStatus.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskStatus.kt deleted file mode 100644 index fe941d09..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/TaskStatus.kt +++ /dev/null @@ -1,33 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.internal - -/** - * The state of a workflow task. - */ -public enum class TaskStatus { - CREATED, - READY, - ACTIVE, - FINISHED -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowSchedulerListener.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowSchedulerListener.kt deleted file mode 100644 index 29c6aeea..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowSchedulerListener.kt +++ /dev/null @@ -1,37 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.internal - -public interface WorkflowSchedulerListener { - public fun cycleStarted(scheduler: WorkflowServiceImpl) {} - public fun cycleFinished(scheduler: WorkflowServiceImpl) {} - - public fun jobSubmitted(job: JobState) {} - public fun jobStarted(job: JobState) {} - public fun jobFinished(job: JobState) {} - - public fun taskReady(task: TaskState) {} - public fun taskAssigned(task: TaskState) {} - public fun taskStarted(task: TaskState) {} - public fun taskFinished(task: TaskState) {} -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowServiceImpl.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowServiceImpl.kt deleted file mode 100644 index 32191b8f..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/internal/WorkflowServiceImpl.kt +++ /dev/null @@ -1,423 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.internal - -import io.opentelemetry.api.metrics.Meter -import kotlinx.coroutines.* -import kotlinx.coroutines.flow.map -import mu.KotlinLogging -import org.opendc.compute.api.* -import org.opendc.workflow.api.Job -import org.opendc.workflow.api.WORKFLOW_TASK_CORES -import org.opendc.workflow.service.* -import org.opendc.workflow.service.scheduler.WorkflowSchedulerMode -import org.opendc.workflow.service.scheduler.job.JobAdmissionPolicy -import org.opendc.workflow.service.scheduler.job.JobOrderPolicy -import org.opendc.workflow.service.scheduler.task.TaskEligibilityPolicy -import org.opendc.workflow.service.scheduler.task.TaskOrderPolicy -import java.time.Clock -import java.util.* -import kotlin.coroutines.Continuation -import kotlin.coroutines.CoroutineContext -import kotlin.coroutines.resume - -/** - * A [WorkflowService] that distributes work through a multi-stage process based on the Reference Architecture for - * Datacenter Scheduling. - */ -public class WorkflowServiceImpl( - context: CoroutineContext, - internal val clock: Clock, - private val meter: Meter, - private val computeClient: ComputeClient, - mode: WorkflowSchedulerMode, - jobAdmissionPolicy: JobAdmissionPolicy, - jobOrderPolicy: JobOrderPolicy, - taskEligibilityPolicy: TaskEligibilityPolicy, - taskOrderPolicy: TaskOrderPolicy -) : WorkflowService, ServerWatcher { - /** - * The [CoroutineScope] of the service bounded by the lifecycle of the service. - */ - internal val scope = CoroutineScope(context + Job()) - - /** - * The logger instance to use. - */ - private val logger = KotlinLogging.logger {} - - /** - * The incoming jobs ready to be processed by the scheduler. - */ - internal val incomingJobs: MutableSet<JobState> = linkedSetOf() - - /** - * The incoming tasks ready to be processed by the scheduler. - */ - internal val incomingTasks: MutableSet<TaskState> = linkedSetOf() - - /** - * The job queue. - */ - internal val jobQueue: Queue<JobState> - - /** - * The task queue. - */ - internal val taskQueue: Queue<TaskState> - - /** - * The active jobs in the system. - */ - internal val activeJobs: MutableSet<JobState> = mutableSetOf() - - /** - * The active tasks in the system. - */ - internal val activeTasks: MutableSet<TaskState> = mutableSetOf() - - /** - * The running tasks by [Server]. - */ - internal val taskByServer = mutableMapOf<Server, TaskState>() - - /** - * The continuation of the jobs. - */ - private val conts = mutableMapOf<Job, Continuation<Unit>>() - - /** - * The root listener of this scheduler. - */ - private val rootListener = object : WorkflowSchedulerListener { - /** - * The listeners to delegate to. - */ - val listeners = mutableSetOf<WorkflowSchedulerListener>() - - override fun cycleStarted(scheduler: WorkflowServiceImpl) { - listeners.forEach { it.cycleStarted(scheduler) } - } - - override fun cycleFinished(scheduler: WorkflowServiceImpl) { - listeners.forEach { it.cycleFinished(scheduler) } - } - - override fun jobSubmitted(job: JobState) { - listeners.forEach { it.jobSubmitted(job) } - } - - override fun jobStarted(job: JobState) { - listeners.forEach { it.jobStarted(job) } - } - - override fun jobFinished(job: JobState) { - listeners.forEach { it.jobFinished(job) } - } - - override fun taskReady(task: TaskState) { - listeners.forEach { it.taskReady(task) } - } - - override fun taskAssigned(task: TaskState) { - listeners.forEach { it.taskAssigned(task) } - } - - override fun taskStarted(task: TaskState) { - listeners.forEach { it.taskStarted(task) } - } - - override fun taskFinished(task: TaskState) { - listeners.forEach { it.taskFinished(task) } - } - } - - /** - * The number of jobs that have been submitted to the service. - */ - private val submittedJobs = meter.longCounterBuilder("jobs.submitted") - .setDescription("Number of submitted jobs") - .setUnit("1") - .build() - - /** - * The number of jobs that are running. - */ - private val runningJobs = meter.longUpDownCounterBuilder("jobs.active") - .setDescription("Number of jobs running") - .setUnit("1") - .build() - - /** - * The number of jobs that have finished running. - */ - private val finishedJobs = meter.longCounterBuilder("jobs.finished") - .setDescription("Number of jobs that finished running") - .setUnit("1") - .build() - - /** - * The number of tasks that have been submitted to the service. - */ - private val submittedTasks = meter.longCounterBuilder("tasks.submitted") - .setDescription("Number of submitted tasks") - .setUnit("1") - .build() - - /** - * The number of jobs that are running. - */ - private val runningTasks = meter.longUpDownCounterBuilder("tasks.active") - .setDescription("Number of tasks running") - .setUnit("1") - .build() - - /** - * The number of jobs that have finished running. - */ - private val finishedTasks = meter.longCounterBuilder("tasks.finished") - .setDescription("Number of tasks that finished running") - .setUnit("1") - .build() - - private val mode: WorkflowSchedulerMode.Logic - private val jobAdmissionPolicy: JobAdmissionPolicy.Logic - private val taskEligibilityPolicy: TaskEligibilityPolicy.Logic - private lateinit var image: Image - - init { - this.mode = mode(this) - this.jobAdmissionPolicy = jobAdmissionPolicy(this) - this.jobQueue = PriorityQueue(100, jobOrderPolicy(this).thenBy { it.job.uid }) - this.taskEligibilityPolicy = taskEligibilityPolicy(this) - this.taskQueue = PriorityQueue(1000, taskOrderPolicy(this).thenBy { it.task.uid }) - scope.launch { - image = computeClient.newImage("workflow-runner") - } - } - - override suspend fun run(job: Job) { - // J1 Incoming Jobs - val jobInstance = JobState(job, clock.millis()) - val instances = job.tasks.associateWith { - TaskState(jobInstance, it) - } - - for ((task, instance) in instances) { - instance.dependencies.addAll(task.dependencies.map { instances[it]!! }) - task.dependencies.forEach { - instances[it]!!.dependents.add(instance) - } - - // If the task has no dependency, it is a root task and can immediately be evaluated - if (instance.isRoot) { - instance.state = TaskStatus.READY - } - - submittedTasks.add(1) - } - - return suspendCancellableCoroutine { cont -> - instances.values.toCollection(jobInstance.tasks) - incomingJobs += jobInstance - rootListener.jobSubmitted(jobInstance) - conts[job] = cont - - submittedJobs.add(1) - - requestCycle() - } - } - - override suspend fun submit(job: Job) { - scope.launch { run(job) } - } - - override fun close() { - scope.cancel() - } - - /** - * Indicate to the scheduler that a scheduling cycle is needed. - */ - private fun requestCycle() = mode.requestCycle() - - /** - * Perform a scheduling cycle immediately. - */ - @OptIn(ExperimentalCoroutinesApi::class) - internal suspend fun schedule() { - // J2 Create list of eligible jobs - val iterator = incomingJobs.iterator() - while (iterator.hasNext()) { - val jobInstance = iterator.next() - val advice = jobAdmissionPolicy(jobInstance) - if (advice.stop) { - break - } else if (!advice.admit) { - continue - } - - iterator.remove() - jobQueue.add(jobInstance) - activeJobs += jobInstance - - runningJobs.add(1) - rootListener.jobStarted(jobInstance) - } - - // J4 Per job - while (jobQueue.isNotEmpty()) { - val jobInstance = jobQueue.poll() - - // Edge-case: job has no tasks - if (jobInstance.isFinished) { - finishJob(jobInstance) - } - - // Add job roots to the scheduling queue - for (task in jobInstance.tasks) { - if (task.state != TaskStatus.READY) { - continue - } - - incomingTasks += task - rootListener.taskReady(task) - } - } - - // T1 Create list of eligible tasks - val taskIterator = incomingTasks.iterator() - while (taskIterator.hasNext()) { - val taskInstance = taskIterator.next() - val advice = taskEligibilityPolicy(taskInstance) - if (advice.stop) { - break - } else if (!advice.admit) { - continue - } - - taskIterator.remove() - taskQueue.add(taskInstance) - } - - // T3 Per task - while (taskQueue.isNotEmpty()) { - val instance = taskQueue.peek() - - val cores = instance.task.metadata[WORKFLOW_TASK_CORES] as? Int ?: 1 - val image = image - scope.launch { - val flavor = computeClient.newFlavor( - instance.task.name, - cores, - 1000 - ) // TODO How to determine memory usage for workflow task - val server = computeClient.newServer( - instance.task.name, - image, - flavor, - start = false, - meta = instance.task.metadata - ) - - instance.state = TaskStatus.ACTIVE - instance.server = server - taskByServer[server] = instance - - server.watch(this@WorkflowServiceImpl) - server.start() - } - - activeTasks += instance - taskQueue.poll() - rootListener.taskAssigned(instance) - } - } - - public override fun onStateChanged(server: Server, newState: ServerState) { - when (newState) { - ServerState.PROVISIONING -> {} - ServerState.RUNNING -> { - val task = taskByServer.getValue(server) - task.startedAt = clock.millis() - runningTasks.add(1) - rootListener.taskStarted(task) - } - ServerState.TERMINATED, ServerState.ERROR -> { - val task = taskByServer.remove(server) ?: throw IllegalStateException() - - scope.launch { - server.delete() - server.flavor.delete() - } - - val job = task.job - task.state = TaskStatus.FINISHED - task.finishedAt = clock.millis() - job.tasks.remove(task) - activeTasks -= task - - runningTasks.add(-1) - finishedTasks.add(1) - rootListener.taskFinished(task) - - // Add job roots to the scheduling queue - for (dependent in task.dependents) { - if (dependent.state != TaskStatus.READY) { - continue - } - - incomingTasks += dependent - rootListener.taskReady(dependent) - } - - if (job.isFinished) { - finishJob(job) - } - - requestCycle() - } - ServerState.DELETED -> { - } - else -> throw IllegalStateException() - } - } - - private fun finishJob(job: JobState) { - activeJobs -= job - runningJobs.add(-1) - finishedJobs.add(1) - rootListener.jobFinished(job) - - conts.remove(job.job)?.resume(Unit) - } - - public fun addListener(listener: WorkflowSchedulerListener) { - rootListener.listeners += listener - } - - public fun removeListener(listener: WorkflowSchedulerListener) { - rootListener.listeners -= listener - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/StagePolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/StagePolicy.kt deleted file mode 100644 index 359fc223..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/StagePolicy.kt +++ /dev/null @@ -1,36 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler - -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import java.io.Serializable - -/** - * A scheduling stage policy. - */ -public interface StagePolicy<T : Any> : Serializable { - /** - * Build the logic of the stage policy. - */ - public operator fun invoke(scheduler: WorkflowServiceImpl): T -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/WorkflowSchedulerMode.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/WorkflowSchedulerMode.kt deleted file mode 100644 index 58e7893f..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/WorkflowSchedulerMode.kt +++ /dev/null @@ -1,105 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler - -import kotlinx.coroutines.delay -import kotlinx.coroutines.launch -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * The operating mode of a workflow scheduler. - */ -public sealed class WorkflowSchedulerMode : StagePolicy<WorkflowSchedulerMode.Logic> { - /** - * The logic for operating the cycles of a workflow scheduler. - */ - public interface Logic { - /** - * Request a new scheduling cycle to be performed. - */ - public fun requestCycle() - } - - /** - * An interactive scheduler immediately triggers a new scheduling cycle when a workflow is received. - */ - public object Interactive : WorkflowSchedulerMode() { - override fun invoke(scheduler: WorkflowServiceImpl): Logic = object : Logic { - override fun requestCycle() { - scheduler.scope.launch { scheduler.schedule() } - } - } - - override fun toString(): String = "Interactive" - } - - /** - * A batch scheduler triggers a scheduling cycle every time quantum if needed. - */ - public data class Batch(val quantum: Long) : WorkflowSchedulerMode() { - private var next: kotlinx.coroutines.Job? = null - - override fun invoke(scheduler: WorkflowServiceImpl): Logic = object : Logic { - override fun requestCycle() { - if (next == null) { - // In batch mode, we assume that the scheduler runs at a fixed slot every time - // quantum (e.g t=0, t=60, t=120). We calculate here the delay until the next scheduling slot. - val delay = quantum - (scheduler.clock.millis() % quantum) - - val job = scheduler.scope.launch { - delay(delay) - next = null - scheduler.schedule() - } - next = job - } - } - } - - override fun toString(): String = "Batch($quantum)" - } - - /** - * A scheduling cycle is triggered at a random point in time. - */ - public data class Random(private val random: java.util.Random = java.util.Random(123)) : WorkflowSchedulerMode() { - private var next: kotlinx.coroutines.Job? = null - - override fun invoke(scheduler: WorkflowServiceImpl): Logic = object : Logic { - override fun requestCycle() { - if (next == null) { - val delay = random.nextInt(200).toLong() - - val job = scheduler.scope.launch { - delay(delay) - next = null - scheduler.schedule() - } - next = job - } - } - } - - override fun toString(): String = "Random" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/DurationJobOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/DurationJobOrderPolicy.kt deleted file mode 100644 index 1b5b91b9..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/DurationJobOrderPolicy.kt +++ /dev/null @@ -1,102 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.api.Job -import org.opendc.workflow.api.Task -import org.opendc.workflow.api.WORKFLOW_TASK_DEADLINE -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [JobOrderPolicy] that orders jobs based on its critical path length. - */ -public data class DurationJobOrderPolicy(val ascending: Boolean = true) : JobOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<JobState> = - object : - Comparator<JobState>, - WorkflowSchedulerListener { - private val results = HashMap<Job, Long>() - - init { - scheduler.addListener(this) - } - - private val Job.duration: Long - get() = results[this]!! - - override fun jobSubmitted(job: JobState) { - results[job.job] = job.job.toposort().map { task -> - val estimable = task.metadata[WORKFLOW_TASK_DEADLINE] as? Long? - estimable ?: Long.MAX_VALUE - }.sum() - } - - override fun jobFinished(job: JobState) { - results.remove(job.job) - } - - override fun compare(o1: JobState, o2: JobState): Int { - return compareValuesBy(o1, o2) { it.job.duration }.let { if (ascending) it else -it } - } - } - - override fun toString(): String { - return "Job-Duration(${if (ascending) "asc" else "desc"})" - } -} - -/** - * Create a topological sorting of the tasks in a job. - * - * @return The list of tasks within the job topologically sorted. - */ -public fun Job.toposort(): List<Task> { - val res = mutableListOf<Task>() - val visited = mutableSetOf<Task>() - val adjacent = mutableMapOf<Task, MutableList<Task>>() - - for (task in tasks) { - for (dependency in task.dependencies) { - adjacent.getOrPut(dependency) { mutableListOf() }.add(task) - } - } - - fun visit(task: Task) { - visited.add(task) - - adjacent[task] ?: emptyList<Task>() - .asSequence() - .filter { it !in visited } - .forEach { visit(it) } - - res.add(task) - } - - tasks - .asSequence() - .filter { it !in visited } - .forEach { visit(it) } - return res -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobAdmissionPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobAdmissionPolicy.kt deleted file mode 100644 index ed3acff7..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobAdmissionPolicy.kt +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.scheduler.StagePolicy - -/** - * A policy interface for admitting [JobState]s to a scheduling cycle. - */ -public interface JobAdmissionPolicy : StagePolicy<JobAdmissionPolicy.Logic> { - public interface Logic { - /** - * Determine whether the specified [JobState] should be admitted to the scheduling cycle. - * - * @param job The workflow that has been submitted. - * @return The advice for admitting the job. - */ - public operator fun invoke(job: JobState): Advice - } - - /** - * The advice given to the scheduler by an admission policy. - * - * @property admit A flag to indicate to the scheduler that the job should be admitted. - * @property stop A flag to indicate the scheduler should immediately stop admitting jobs to the scheduling queue and wait - * for the next scheduling cycle. - */ - public enum class Advice(public val admit: Boolean, public val stop: Boolean) { - /** - * Admit the current job to the scheduling queue and continue admitting jobs. - */ - ADMIT(true, false), - - /** - * Admit the current job to the scheduling queue and stop admitting jobs. - */ - ADMIT_LAST(true, true), - - /** - * Deny the current job, but continue admitting jobs. - */ - DENY(false, false), - - /** - * Deny the current job and also stop admitting jobs. - */ - STOP(false, true) - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobOrderPolicy.kt deleted file mode 100644 index adaa6671..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/JobOrderPolicy.kt +++ /dev/null @@ -1,31 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.scheduler.StagePolicy - -/** - * A policy interface for ordering admitted workflows in the scheduling queue. - */ -public interface JobOrderPolicy : StagePolicy<Comparator<JobState>> diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/LimitJobAdmissionPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/LimitJobAdmissionPolicy.kt deleted file mode 100644 index 6a0bfeb9..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/LimitJobAdmissionPolicy.kt +++ /dev/null @@ -1,45 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [JobAdmissionPolicy] that limits the amount of active jobs in the system. - * - * @property limit The maximum number of concurrent jobs in the system. - */ -public data class LimitJobAdmissionPolicy(public val limit: Int) : JobAdmissionPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): JobAdmissionPolicy.Logic = object : JobAdmissionPolicy.Logic { - override fun invoke( - job: JobState - ): JobAdmissionPolicy.Advice = - if (scheduler.activeJobs.size < limit) - JobAdmissionPolicy.Advice.ADMIT - else - JobAdmissionPolicy.Advice.STOP - } - - override fun toString(): String = "Limit-Active($limit)" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/NullJobAdmissionPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/NullJobAdmissionPolicy.kt deleted file mode 100644 index 31f8f8db..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/NullJobAdmissionPolicy.kt +++ /dev/null @@ -1,37 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [JobAdmissionPolicy] that admits all jobs. - */ -public object NullJobAdmissionPolicy : JobAdmissionPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): JobAdmissionPolicy.Logic = object : JobAdmissionPolicy.Logic { - override fun invoke(job: JobState): JobAdmissionPolicy.Advice = JobAdmissionPolicy.Advice.ADMIT - } - - override fun toString(): String = "Always" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/RandomJobOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/RandomJobOrderPolicy.kt deleted file mode 100644 index 1b359125..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/RandomJobOrderPolicy.kt +++ /dev/null @@ -1,63 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.api.Job -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import java.util.* -import kotlin.collections.HashMap - -/** - * A [JobOrderPolicy] that randomly orders jobs. - */ -public object RandomJobOrderPolicy : JobOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<JobState> = - object : - Comparator<JobState>, - WorkflowSchedulerListener { - private val random = Random(123) - private val ids = HashMap<Job, Int>() - - init { - scheduler.addListener(this) - } - - override fun jobSubmitted(job: JobState) { - ids[job.job] = random.nextInt() - } - - override fun jobFinished(job: JobState) { - ids.remove(job.job) - } - - override fun compare(o1: JobState, o2: JobState): Int { - return compareValuesBy(o1, o2) { ids.getValue(it.job) } - } - } - - override fun toString(): String { - return "Random" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SizeJobOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SizeJobOrderPolicy.kt deleted file mode 100644 index 6998606d..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SizeJobOrderPolicy.kt +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [SizeJobOrderPolicy] that orders jobs based on the number of tasks it has. - */ -public data class SizeJobOrderPolicy(public val ascending: Boolean = true) : JobOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<JobState> = - compareBy { it.tasks.size.let { if (ascending) it else -it } } - - override fun toString(): String { - return "Job-Size(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SubmissionTimeJobOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SubmissionTimeJobOrderPolicy.kt deleted file mode 100644 index 53d06023..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/job/SubmissionTimeJobOrderPolicy.kt +++ /dev/null @@ -1,38 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.job - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [JobOrderPolicy] orders jobs in FIFO order. - */ -public data class SubmissionTimeJobOrderPolicy(public val ascending: Boolean = true) : JobOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<JobState> = - compareBy { it.submittedAt.let { if (ascending) it else -it } } - - override fun toString(): String { - return "Submission-Time(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/ActiveTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/ActiveTaskOrderPolicy.kt deleted file mode 100644 index 821d4964..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/ActiveTaskOrderPolicy.kt +++ /dev/null @@ -1,68 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the number of active relative tasks (w.r.t. its job) in the system. - */ -public data class ActiveTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = - object : Comparator<TaskState>, WorkflowSchedulerListener { - private val active = mutableMapOf<JobState, Int>() - - init { - scheduler.addListener(this) - } - - override fun jobStarted(job: JobState) { - active[job] = 0 - } - - override fun jobFinished(job: JobState) { - active.remove(job) - } - - override fun taskAssigned(task: TaskState) { - active.merge(task.job, 1, Int::plus) - } - - override fun taskFinished(task: TaskState) { - active.merge(task.job, -1, Int::plus) - } - - override fun compare(o1: TaskState, o2: TaskState): Int { - return compareValuesBy(o1, o2) { active.getValue(it.job) }.let { - if (ascending) it else -it - } - } - } - - override fun toString(): String { - return "Active-Per-Job(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/BalancingTaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/BalancingTaskEligibilityPolicy.kt deleted file mode 100644 index 42804f5a..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/BalancingTaskEligibilityPolicy.kt +++ /dev/null @@ -1,76 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import kotlin.math.max - -/** - * A [TaskEligibilityPolicy] that balances the tasks based on their job, e.g. do not allow a single job to claim all - * resources of the system. - * - * @property tolerance The maximum difference from the average number of tasks per job in the system as a fraction of - * the average. - */ -public data class BalancingTaskEligibilityPolicy(public val tolerance: Double = 1.5) : TaskEligibilityPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): TaskEligibilityPolicy.Logic = - object : TaskEligibilityPolicy.Logic, WorkflowSchedulerListener { - private val active = mutableMapOf<JobState, Int>() - - init { - scheduler.addListener(this) - } - - override fun jobStarted(job: JobState) { - active[job] = 0 - } - - override fun jobFinished(job: JobState) { - active.remove(job) - } - - override fun taskAssigned(task: TaskState) { - active.merge(task.job, 1, Int::plus) - } - - override fun taskFinished(task: TaskState) { - active.merge(task.job, -1, Int::plus) - } - - override fun invoke(task: TaskState): TaskEligibilityPolicy.Advice { - val activeJobs = scheduler.activeJobs.size - val activeTasks = scheduler.activeTasks.size - val baseline = max(activeTasks / activeJobs.toDouble(), 1.0) - val activeForJob = active[task.job]!! - return if ((activeForJob + 1) / baseline < tolerance) - TaskEligibilityPolicy.Advice.ADMIT - else - TaskEligibilityPolicy.Advice.DENY - } - } - - override fun toString(): String = "Job-Balance($tolerance)" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/CompletionTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/CompletionTaskOrderPolicy.kt deleted file mode 100644 index dae7ad99..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/CompletionTaskOrderPolicy.kt +++ /dev/null @@ -1,64 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the number of completed relative tasks. - */ -public data class CompletionTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = - object : Comparator<TaskState>, WorkflowSchedulerListener { - private val finished = mutableMapOf<JobState, Int>() - - init { - scheduler.addListener(this) - } - - override fun jobStarted(job: JobState) { - finished[job] = 0 - } - - override fun jobFinished(job: JobState) { - finished.remove(job) - } - - override fun taskFinished(task: TaskState) { - finished.merge(task.job, 1, Int::plus) - } - - override fun compare(o1: TaskState, o2: TaskState): Int { - return compareValuesBy(o1, o2) { finished.getValue(it.job) / it.job.tasks.size.toDouble() }.let { - if (ascending) it else -it - } - } - } - - override fun toString(): String { - return "Job-Completion(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependenciesTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependenciesTaskOrderPolicy.kt deleted file mode 100644 index 7786f6ec..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependenciesTaskOrderPolicy.kt +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the number of dependency tasks it has. - */ -public data class DependenciesTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = compareBy { - it.task.dependencies.size.let { if (ascending) it else -it } - } - - override fun toString(): String { - return "Task-Dependencies(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependentsTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependentsTaskOrderPolicy.kt deleted file mode 100644 index 4fb835d7..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DependentsTaskOrderPolicy.kt +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the number of dependent tasks it has. - */ -public data class DependentsTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = compareBy { - it.dependents.size.let { if (ascending) it else -it } - } - - override fun toString(): String { - return "Task-Dependents(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationHistoryTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationHistoryTaskOrderPolicy.kt deleted file mode 100644 index 3a634de7..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationHistoryTaskOrderPolicy.kt +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the average duration of the preceding tasks in the job. - */ -public data class DurationHistoryTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = - object : Comparator<TaskState>, WorkflowSchedulerListener { - private val results = HashMap<JobState, MutableList<Long>>() - - init { - scheduler.addListener(this) - } - - override fun jobStarted(job: JobState) { - results[job] = mutableListOf() - } - - override fun jobFinished(job: JobState) { - results.remove(job) - } - - override fun taskFinished(task: TaskState) { - results.getValue(task.job) += task.finishedAt - task.startedAt - } - - override fun compare(o1: TaskState, o2: TaskState): Int { - return compareValuesBy(o1, o2) { key -> - val history = results.getValue(key.job) - if (history.isEmpty()) { - Long.MAX_VALUE - } else { - history.average() - } - }.let { if (ascending) it else -it } - } - } - - override fun toString(): String { - return "Task-Duration-History(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationTaskOrderPolicy.kt deleted file mode 100644 index d9fde53a..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/DurationTaskOrderPolicy.kt +++ /dev/null @@ -1,69 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.api.WORKFLOW_TASK_DEADLINE -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import java.util.* -import kotlin.collections.HashMap -import kotlin.collections.getValue -import kotlin.collections.set - -/** - * A [TaskOrderPolicy] orders tasks based on the pre-specified (approximate) duration of the task. - */ -public data class DurationTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = - object : Comparator<TaskState>, WorkflowSchedulerListener { - private val results = HashMap<UUID, Long>() - - init { - scheduler.addListener(this) - } - - override fun taskReady(task: TaskState) { - val deadline = task.task.metadata[WORKFLOW_TASK_DEADLINE] as? Long? - results[task.task.uid] = deadline ?: Long.MAX_VALUE - } - - override fun taskFinished(task: TaskState) { - results -= task.task.uid - } - - private val TaskState.duration: Long - get() = results.getValue(task.uid) - - override fun compare(o1: TaskState, o2: TaskState): Int { - return compareValuesBy(o1, o2) { state -> state.duration }.let { - if (ascending) it else -it - } - } - } - - override fun toString(): String { - return "Task-Duration(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitPerJobTaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitPerJobTaskEligibilityPolicy.kt deleted file mode 100644 index 229460df..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitPerJobTaskEligibilityPolicy.kt +++ /dev/null @@ -1,68 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.JobState -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskEligibilityPolicy] that limits the number of active tasks of a job in the system. - */ -public data class LimitPerJobTaskEligibilityPolicy(public val limit: Int) : TaskEligibilityPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): TaskEligibilityPolicy.Logic = - object : TaskEligibilityPolicy.Logic, WorkflowSchedulerListener { - private val active = mutableMapOf<JobState, Int>() - - init { - scheduler.addListener(this) - } - - override fun jobStarted(job: JobState) { - active[job] = 0 - } - - override fun jobFinished(job: JobState) { - active.remove(job) - } - - override fun taskAssigned(task: TaskState) { - active.merge(task.job, 1, Int::plus) - } - - override fun taskFinished(task: TaskState) { - active.merge(task.job, -1, Int::plus) - } - - override fun invoke(task: TaskState): TaskEligibilityPolicy.Advice { - val activeForJob = active[task.job]!! - return if (activeForJob <= limit) - TaskEligibilityPolicy.Advice.ADMIT - else - TaskEligibilityPolicy.Advice.DENY - } - } - - override fun toString(): String = "Limit-Active-Job($limit)" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitTaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitTaskEligibilityPolicy.kt deleted file mode 100644 index 57aa0d58..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/LimitTaskEligibilityPolicy.kt +++ /dev/null @@ -1,43 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskEligibilityPolicy] that limits the total number of active tasks in the system. - */ -public data class LimitTaskEligibilityPolicy(val limit: Int) : TaskEligibilityPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): TaskEligibilityPolicy.Logic = object : TaskEligibilityPolicy.Logic { - override fun invoke( - task: TaskState - ): TaskEligibilityPolicy.Advice = - if (scheduler.activeTasks.size < limit) - TaskEligibilityPolicy.Advice.ADMIT - else - TaskEligibilityPolicy.Advice.STOP - } - - override fun toString(): String = "Limit-Active($limit)" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/NullTaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/NullTaskEligibilityPolicy.kt deleted file mode 100644 index cfe2aeed..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/NullTaskEligibilityPolicy.kt +++ /dev/null @@ -1,41 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskEligibilityPolicy] that always allows new tasks to enter. - */ -public object NullTaskEligibilityPolicy : TaskEligibilityPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): TaskEligibilityPolicy.Logic = Logic - - private object Logic : TaskEligibilityPolicy.Logic { - override fun invoke( - task: TaskState - ): TaskEligibilityPolicy.Advice = TaskEligibilityPolicy.Advice.ADMIT - } - - override fun toString(): String = "Always" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskEligibilityPolicy.kt deleted file mode 100644 index a01439c2..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskEligibilityPolicy.kt +++ /dev/null @@ -1,45 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import java.util.* - -/** - * A [TaskEligibilityPolicy] that randomly accepts tasks in the system with some [probability]. - */ -public data class RandomTaskEligibilityPolicy(val probability: Double = 0.5) : TaskEligibilityPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): TaskEligibilityPolicy.Logic = object : TaskEligibilityPolicy.Logic { - val random = Random(123) - - override fun invoke(task: TaskState): TaskEligibilityPolicy.Advice = - if (random.nextDouble() <= probability || scheduler.activeTasks.isEmpty()) - TaskEligibilityPolicy.Advice.ADMIT - else { - TaskEligibilityPolicy.Advice.DENY - } - } - - override fun toString(): String = "Random($probability)" -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskOrderPolicy.kt deleted file mode 100644 index c12d6a66..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/RandomTaskOrderPolicy.kt +++ /dev/null @@ -1,60 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.api.Task -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowSchedulerListener -import org.opendc.workflow.service.internal.WorkflowServiceImpl -import kotlin.random.Random - -/** - * A [TaskOrderPolicy] that orders the tasks randomly. - */ -public object RandomTaskOrderPolicy : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = - object : Comparator<TaskState>, WorkflowSchedulerListener { - private val random = Random(123) - private val ids = HashMap<Task, Int>() - - init { - scheduler.addListener(this) - } - - override fun taskReady(task: TaskState) { - ids[task.task] = random.nextInt() - } - - override fun taskFinished(task: TaskState) { - ids.remove(task.task) - } - - override fun compare(o1: TaskState, o2: TaskState): Int { - return compareValuesBy(o1, o2) { ids.getValue(it.task) } - } - } - - override fun toString(): String { - return "Random" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/SubmissionTimeTaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/SubmissionTimeTaskOrderPolicy.kt deleted file mode 100644 index e9bbf815..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/SubmissionTimeTaskOrderPolicy.kt +++ /dev/null @@ -1,39 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.internal.WorkflowServiceImpl - -/** - * A [TaskOrderPolicy] that orders tasks based on the order of arrival in the queue. - */ -public data class SubmissionTimeTaskOrderPolicy(public val ascending: Boolean = true) : TaskOrderPolicy { - override fun invoke(scheduler: WorkflowServiceImpl): Comparator<TaskState> = compareBy { - it.job.submittedAt.let { if (ascending) it else -it } - } - - override fun toString(): String { - return "Submission-Time(${if (ascending) "asc" else "desc"})" - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskEligibilityPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskEligibilityPolicy.kt deleted file mode 100644 index ee31aee2..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskEligibilityPolicy.kt +++ /dev/null @@ -1,70 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.scheduler.StagePolicy - -/** - * A policy interface for determining the eligibility of tasks in a scheduling cycle. - */ -public interface TaskEligibilityPolicy : StagePolicy<TaskEligibilityPolicy.Logic> { - public interface Logic { - /** - * Determine whether the specified [TaskState] is eligible to be scheduled. - * - * @param task The task instance to schedule. - * @return The advice for marking the task. - */ - public operator fun invoke(task: TaskState): Advice - } - - /** - * The advice given to the scheduler by an admission policy. - * - * @property admit A flag to indicate to the scheduler that the job should be admitted. - * @property stop A flag to indicate the scheduler should immediately stop admitting jobs to the scheduling queue and wait - * for the next scheduling cycle. - */ - public enum class Advice(public val admit: Boolean, public val stop: Boolean) { - /** - * Admit the current job to the scheduling queue and continue admitting jobs. - */ - ADMIT(true, false), - - /** - * Admit the current job to the scheduling queue and stop admitting jobs. - */ - ADMIT_LAST(true, true), - - /** - * Deny the current job, but continue admitting jobs. - */ - DENY(false, false), - - /** - * Deny the current job and also stop admitting jobs. - */ - STOP(false, true) - } -} diff --git a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskOrderPolicy.kt b/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskOrderPolicy.kt deleted file mode 100644 index fffcb765..00000000 --- a/simulator/opendc-workflow/opendc-workflow-service/src/main/kotlin/org/opendc/workflow/service/scheduler/task/TaskOrderPolicy.kt +++ /dev/null @@ -1,32 +0,0 @@ -/* - * Copyright (c) 2021 AtLarge Research - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in all - * copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE - * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE - * SOFTWARE. - */ - -package org.opendc.workflow.service.scheduler.task - -import org.opendc.workflow.service.internal.TaskState -import org.opendc.workflow.service.scheduler.StagePolicy - -/** - * This interface represents the **T2** stage of the Reference Architecture for Topology Schedulers and provides the - * scheduler with a sorted list of tasks to schedule. - */ -public interface TaskOrderPolicy : StagePolicy<Comparator<TaskState>> |