| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.reef.examples.suspend; |
| |
| import org.apache.reef.client.*; |
| import org.apache.reef.tang.Configuration; |
| import org.apache.reef.tang.JavaConfigurationBuilder; |
| import org.apache.reef.tang.Tang; |
| import org.apache.reef.tang.annotations.Parameter; |
| import org.apache.reef.tang.annotations.Unit; |
| import org.apache.reef.tang.exceptions.BindException; |
| import org.apache.reef.util.EnvironmentUtils; |
| import org.apache.reef.wake.EventHandler; |
| |
| import javax.inject.Inject; |
| import java.io.IOException; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| /** |
| * Client for suspend example. |
| */ |
| @Unit |
| public class SuspendClient { |
| |
| /** |
| * Standard java logger. |
| */ |
| private static final Logger LOG = Logger.getLogger(SuspendClient.class.getName()); |
| |
| /** |
| * Job Driver configuration. |
| */ |
| private final Configuration driverConfig; |
| |
| /** |
| * Reference to the REEF framework. |
| */ |
| private final REEF reef; |
| |
| /** |
| * Controller that listens for suspend/resume commands on a specified port. |
| */ |
| private final SuspendClientControl controlListener; |
| |
| /** |
| * @param reef reference to the REEF framework. |
| * @param controlListener suspend client control listener. |
| * @param numCycles number of cycles to run in the task. |
| * @param delay delay in seconds between cycles in the task. |
| */ |
| @Inject |
| SuspendClient( |
| final REEF reef, |
| final SuspendClientControl controlListener, |
| @Parameter(Launch.NumCycles.class) final int numCycles, |
| @Parameter(Launch.Delay.class) final int delay) throws BindException, IOException { |
| |
| final JavaConfigurationBuilder cb = Tang.Factory.getTang().newConfigurationBuilder() |
| .bindNamedParameter(Launch.NumCycles.class, Integer.toString(numCycles)) |
| .bindNamedParameter(Launch.Delay.class, Integer.toString(delay)); |
| |
| cb.addConfiguration(DriverConfiguration.CONF |
| .set(DriverConfiguration.GLOBAL_LIBRARIES, EnvironmentUtils.getClassLocation(SuspendDriver.class)) |
| .set(DriverConfiguration.DRIVER_IDENTIFIER, "suspend-" + System.currentTimeMillis()) |
| .set(DriverConfiguration.ON_TASK_RUNNING, SuspendDriver.RunningTaskHandler.class) |
| .set(DriverConfiguration.ON_TASK_COMPLETED, SuspendDriver.CompletedTaskHandler.class) |
| .set(DriverConfiguration.ON_TASK_SUSPENDED, SuspendDriver.SuspendedTaskHandler.class) |
| .set(DriverConfiguration.ON_TASK_MESSAGE, SuspendDriver.TaskMessageHandler.class) |
| .set(DriverConfiguration.ON_EVALUATOR_ALLOCATED, SuspendDriver.AllocatedEvaluatorHandler.class) |
| .set(DriverConfiguration.ON_CONTEXT_ACTIVE, SuspendDriver.ActiveContextHandler.class) |
| .set(DriverConfiguration.ON_CLIENT_MESSAGE, SuspendDriver.ClientMessageHandler.class) |
| .set(DriverConfiguration.ON_DRIVER_STARTED, SuspendDriver.StartHandler.class) |
| .set(DriverConfiguration.ON_DRIVER_STOP, SuspendDriver.StopHandler.class) |
| .build()); |
| |
| this.driverConfig = cb.build(); |
| this.reef = reef; |
| this.controlListener = controlListener; |
| } |
| |
| /** |
| * Start the job driver. |
| */ |
| public void submit() { |
| LOG.info("Start the job driver"); |
| this.reef.submit(this.driverConfig); |
| } |
| |
| /** |
| * Wait for the job to complete. |
| */ |
| public void waitForCompletion() throws Exception { |
| LOG.info("Waiting for the Job Driver to complete."); |
| try { |
| synchronized (this) { |
| this.wait(); |
| } |
| } catch (final InterruptedException ex) { |
| LOG.log(Level.WARNING, "Waiting for result interrupted.", ex); |
| } |
| this.reef.close(); |
| this.controlListener.close(); |
| } |
| |
| /** |
| * Receive notification from the driver that the job is about to run. |
| * RunningJob object is a proxy to the running job driver that can be used for sending messages. |
| */ |
| final class RunningJobHandler implements EventHandler<RunningJob> { |
| @Override |
| public void onNext(final RunningJob job) { |
| LOG.log(Level.INFO, "Running job: {0}", job.getId()); |
| SuspendClient.this.controlListener.setRunningJob(job); |
| } |
| } |
| |
| /** |
| * Receive notification from the driver that the job had failed. |
| * <p> |
| * FailedJob is a proxy for the failed job driver |
| * (contains job ID and exception thrown from the driver). |
| */ |
| final class FailedJobHandler implements EventHandler<FailedJob> { |
| @Override |
| public void onNext(final FailedJob job) { |
| LOG.log(Level.SEVERE, "Failed job: " + job.getId(), job.getReason().orElse(null)); |
| synchronized (SuspendClient.this) { |
| SuspendClient.this.notify(); |
| } |
| } |
| } |
| |
| /** |
| * Receive notification from the driver that the job had completed successfully. |
| */ |
| final class CompletedJobHandler implements EventHandler<CompletedJob> { |
| @Override |
| public void onNext(final CompletedJob job) { |
| LOG.log(Level.INFO, "Completed job: {0}", job.getId()); |
| synchronized (SuspendClient.this) { |
| SuspendClient.this.notify(); |
| } |
| } |
| } |
| |
| /** |
| * Receive notification that there was an exception thrown from the job driver. |
| */ |
| final class RuntimeErrorHandler implements EventHandler<FailedRuntime> { |
| @Override |
| public void onNext(final FailedRuntime error) { |
| LOG.log(Level.SEVERE, "ERROR: " + error, error.getReason().orElse(null)); |
| synchronized (SuspendClient.this) { |
| SuspendClient.this.notify(); |
| } |
| } |
| } |
| } |