diff options
Diffstat (limited to 'opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt')
| -rw-r--r-- | opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt b/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt new file mode 100644 index 00000000..ddd30483 --- /dev/null +++ b/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt @@ -0,0 +1,121 @@ +/* + * 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.harness.engine + +import kotlinx.coroutines.flow.Flow +import kotlinx.coroutines.flow.collect +import kotlinx.coroutines.runBlocking +import org.opendc.harness.api.ExperimentDefinition +import org.opendc.harness.engine.scheduler.ExperimentScheduler +import org.opendc.harness.engine.scheduler.ThreadPoolExperimentScheduler +import org.opendc.harness.engine.strategy.CartesianExperimentStrategy +import org.opendc.harness.engine.strategy.ExperimentStrategy +import org.opendc.harness.internal.CompositeExperimentExecutionListener + +/** + * A builder class for conducting experiments via the [ExperimentEngine]. + */ +public class ExperimentEngineLauncher private constructor( + private val strategy: ExperimentStrategy?, + private val scheduler: ExperimentScheduler?, + private val listeners: List<ExperimentExecutionListener>, + private val repeats: Int +) { + /** + * Construct an [ExperimentEngineLauncher] instance. + */ + public constructor() : this(null, null, emptyList(), 1) + + /** + * Create an [ExperimentEngineLauncher] with the specified [strategy]. + */ + public fun withScheduler(strategy: ExperimentStrategy): ExperimentEngineLauncher { + return ExperimentEngineLauncher(strategy, scheduler, listeners, repeats) + } + + /** + * Create an [ExperimentEngineLauncher] with the specified [scheduler]. + */ + public fun withScheduler(scheduler: ExperimentScheduler): ExperimentEngineLauncher { + return ExperimentEngineLauncher(strategy, scheduler, listeners, repeats) + } + + /** + * Create an [ExperimentEngineLauncher] with the specified [listener] added. + */ + public fun withListener(listener: ExperimentExecutionListener): ExperimentEngineLauncher { + return ExperimentEngineLauncher(strategy, scheduler, listeners + listener, repeats) + } + + /** + * Create an [ExperimentEngineLauncher] with the specified number of repeats. + */ + public fun withRepeats(repeats: Int): ExperimentEngineLauncher { + require(repeats > 0) { "Invalid number of repeats; must be greater than zero. " } + return ExperimentEngineLauncher(strategy, scheduler, listeners, repeats) + } + + /** + * Launch the specified experiments via the [ExperimentEngine] and block execution until finished. + */ + public suspend fun run(experiments: Flow<ExperimentDefinition>) { + val engine = ExperimentEngine(createStrategy(), createScheduler(), createListener(), repeats) + experiments.collect { experiment -> engine.execute(experiment) } + } + + /** + * Launch the specified experiments via the [ExperimentEngine] and block the current thread until finished. + */ + public fun runBlocking(experiments: Flow<ExperimentDefinition>) { + runBlocking { + run(experiments) + } + } + + /** + * Return a string representation of this instance. + */ + public override fun toString(): String = "ExperimentEngineLauncher" + + /** + * Create the [ExperimentStrategy] that explores the experiment design space. + */ + private fun createStrategy(): ExperimentStrategy { + return strategy ?: CartesianExperimentStrategy + } + + /** + * Create the [ExperimentScheduler] that schedules the trials over the compute resources. + */ + private fun createScheduler(): ExperimentScheduler { + return scheduler ?: ThreadPoolExperimentScheduler(Runtime.getRuntime().availableProcessors()) + } + + /** + * Create the [ExperimentExecutionListener] that listens the to the execution of the experiments. + */ + private fun createListener(): ExperimentExecutionListener { + require(listeners.isNotEmpty()) { "No listeners registered." } + return CompositeExperimentExecutionListener(listeners) + } +} |
