106 lines
3.3 KiB
Java
106 lines
3.3 KiB
Java
/*
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* Copyright (c) 2015, 2016 OpenStack Foundation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.openstack.storlet.daemon;
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import java.io.OutputStream;
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import java.io.IOException;
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import java.util.HashMap;
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import java.util.UUID;
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import org.slf4j.LoggerFactory;
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import ch.qos.logback.classic.Logger;
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import ch.qos.logback.classic.Level;
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import java.util.concurrent.*;
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/*----------------------------------------------------------------------------
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* SExecutionManager
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*
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* This class manages thread workers to execute storlet application
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* */
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public class SExecutionManager {
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private Logger logger_;
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private ExecutorService threadPool_;
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private String strStorletName_;
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private int nPoolSize;
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private HashMap<String, Future> taskIdToTask_;
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private static int nDefaultTimeoutToWaitBeforeShutdown_ = 3;
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public SExecutionManager(final String strStorletName,
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final Logger logger, final int nPoolSize) {
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this.strStorletName_ = strStorletName;
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this.logger_ = logger;
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this.nPoolSize = nPoolSize;
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}
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public void initialize() {
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this.logger_.trace("Initialising thread pool with "
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+ nPoolSize + " threads");
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this.threadPool_ = Executors.newFixedThreadPool(nPoolSize);
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this.taskIdToTask_ = new HashMap<String, Future>();
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}
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public void terminate() {
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this.logger_.info(this.strStorletName_ + ": Shutting down threadpool");
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try {
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this.threadPool_.awaitTermination(
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nDefaultTimeoutToWaitBeforeShutdown_,
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TimeUnit.SECONDS);
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} catch (InterruptedException e) {
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e.printStackTrace();
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}
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this.threadPool_.shutdown();
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this.logger_.info(this.strStorletName_ + ": threadpool down");
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}
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public String submitTask(final SExecutionTask sTask) {
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Future futureTask = threadPool_.submit(sTask);
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UUID uuid = UUID.randomUUID();
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String taskId = uuid.toString().substring(8);
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synchronized (this.taskIdToTask_) {
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this.taskIdToTask_.put(taskId, futureTask);
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}
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return taskId;
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}
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public boolean cancelTask(final String taskId) {
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boolean bStatus = true;
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if (this.taskIdToTask_.get(taskId) == null) {
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this.logger_.trace(this.strStorletName_ + ": " + taskId + " is not found");
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bStatus = false;
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} else {
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this.logger_.trace(this.strStorletName_ + ": cancelling " + taskId);
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(this.taskIdToTask_.get(taskId)).cancel(true);
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synchronized (this.taskIdToTask_) {
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this.taskIdToTask_.remove(taskId);
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}
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}
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return bStatus;
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}
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public void cleanupTask(final String taskId) {
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synchronized (this.taskIdToTask_) {
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this.taskIdToTask_.remove(taskId);
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}
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}
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}
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