harness: Improve OpenDC Experiment Harness (v1)

This pull request contains several improvements to the OpenDC Experiment Harness, 
which aims to improve user-experience of users when re-running experiments in the repository.

*  Split the harness into separate modules
*  Add support for adding additional classpath entries when running experiments via the console
*  Initial support for configuration of experiments using HOCON.

1 files changed, 0 insertions, 121 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
deleted file mode 100644
index ddd30483..00000000
--- a/opendc-harness/src/main/kotlin/org/opendc/harness/engine/ExperimentEngineLauncher.kt
+++ /dev/null
@@ -1,121 +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.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)
-    }
-}