| /* |
| * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. Oracle designates this |
| * particular file as subject to the "Classpath" exception as provided |
| * by Oracle in the LICENSE file that accompanied this code. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| package com.sun.corba.se.impl.orbutil.threadpool; |
| |
| import java.util.LinkedList; |
| |
| import com.sun.corba.se.spi.orbutil.threadpool.ThreadPool; |
| import com.sun.corba.se.spi.orbutil.threadpool.Work; |
| import com.sun.corba.se.spi.orbutil.threadpool.WorkQueue; |
| |
| import com.sun.corba.se.impl.orbutil.ORBConstants; |
| import com.sun.corba.se.impl.orbutil.threadpool.ThreadPoolImpl; |
| |
| import com.sun.corba.se.spi.monitoring.MonitoringConstants; |
| import com.sun.corba.se.spi.monitoring.MonitoringFactories; |
| import com.sun.corba.se.spi.monitoring.MonitoredObject; |
| import com.sun.corba.se.spi.monitoring.LongMonitoredAttributeBase; |
| |
| public class WorkQueueImpl implements WorkQueue |
| { |
| private ThreadPool workerThreadPool; |
| private LinkedList theWorkQueue = new LinkedList(); |
| private long workItemsAdded = 0; |
| |
| // Initialized to 1 to avoid divide by zero in averageTimeInQueue() |
| private long workItemsDequeued = 1; |
| |
| private long totalTimeInQueue = 0; |
| |
| // Name of the work queue |
| private String name; |
| |
| // MonitoredObject for work queue |
| private MonitoredObject workqueueMonitoredObject; |
| |
| public WorkQueueImpl() { |
| name=ORBConstants.WORKQUEUE_DEFAULT_NAME; |
| initializeMonitoring(); |
| } |
| |
| public WorkQueueImpl(ThreadPool workerThreadPool) { |
| this(workerThreadPool, ORBConstants.WORKQUEUE_DEFAULT_NAME); |
| } |
| |
| public WorkQueueImpl(ThreadPool workerThreadPool, String name) { |
| this.workerThreadPool = workerThreadPool; |
| this.name = name; |
| initializeMonitoring(); |
| } |
| |
| // Setup monitoring for this workqueue |
| private void initializeMonitoring() { |
| workqueueMonitoredObject = MonitoringFactories. |
| getMonitoredObjectFactory(). |
| createMonitoredObject(name, |
| MonitoringConstants.WORKQUEUE_MONITORING_DESCRIPTION); |
| |
| LongMonitoredAttributeBase b1 = new |
| LongMonitoredAttributeBase(MonitoringConstants.WORKQUEUE_TOTAL_WORK_ITEMS_ADDED, |
| MonitoringConstants.WORKQUEUE_TOTAL_WORK_ITEMS_ADDED_DESCRIPTION) { |
| public Object getValue() { |
| return new Long(WorkQueueImpl.this.totalWorkItemsAdded()); |
| } |
| }; |
| workqueueMonitoredObject.addAttribute(b1); |
| LongMonitoredAttributeBase b2 = new |
| LongMonitoredAttributeBase(MonitoringConstants.WORKQUEUE_WORK_ITEMS_IN_QUEUE, |
| MonitoringConstants.WORKQUEUE_WORK_ITEMS_IN_QUEUE_DESCRIPTION) { |
| public Object getValue() { |
| return new Long(WorkQueueImpl.this.workItemsInQueue()); |
| } |
| }; |
| workqueueMonitoredObject.addAttribute(b2); |
| LongMonitoredAttributeBase b3 = new |
| LongMonitoredAttributeBase(MonitoringConstants.WORKQUEUE_AVERAGE_TIME_IN_QUEUE, |
| MonitoringConstants.WORKQUEUE_AVERAGE_TIME_IN_QUEUE_DESCRIPTION) { |
| public Object getValue() { |
| return new Long(WorkQueueImpl.this.averageTimeInQueue()); |
| } |
| }; |
| workqueueMonitoredObject.addAttribute(b3); |
| } |
| |
| |
| // Package private method to get the monitored object for this |
| // class |
| MonitoredObject getMonitoredObject() { |
| return workqueueMonitoredObject; |
| } |
| |
| public synchronized void addWork(Work work) { |
| workItemsAdded++; |
| work.setEnqueueTime(System.currentTimeMillis()); |
| theWorkQueue.addLast(work); |
| ((ThreadPoolImpl)workerThreadPool).notifyForAvailableWork(this); |
| } |
| |
| synchronized Work requestWork(long waitTime) throws TimeoutException, InterruptedException |
| { |
| Work workItem; |
| ((ThreadPoolImpl)workerThreadPool).incrementNumberOfAvailableThreads(); |
| |
| if (theWorkQueue.size() != 0) { |
| workItem = (Work)theWorkQueue.removeFirst(); |
| totalTimeInQueue += System.currentTimeMillis() - workItem.getEnqueueTime(); |
| workItemsDequeued++; |
| ((ThreadPoolImpl)workerThreadPool).decrementNumberOfAvailableThreads(); |
| return workItem; |
| } |
| |
| try { |
| |
| long remainingWaitTime = waitTime; |
| long finishTime = System.currentTimeMillis() + waitTime; |
| |
| do { |
| |
| this.wait(remainingWaitTime); |
| |
| if (theWorkQueue.size() != 0) { |
| workItem = (Work)theWorkQueue.removeFirst(); |
| totalTimeInQueue += System.currentTimeMillis() - workItem.getEnqueueTime(); |
| workItemsDequeued++; |
| ((ThreadPoolImpl)workerThreadPool).decrementNumberOfAvailableThreads(); |
| return workItem; |
| } |
| |
| remainingWaitTime = finishTime - System.currentTimeMillis(); |
| |
| } while (remainingWaitTime > 0); |
| |
| ((ThreadPoolImpl)workerThreadPool).decrementNumberOfAvailableThreads(); |
| throw new TimeoutException(); |
| |
| } catch (InterruptedException ie) { |
| ((ThreadPoolImpl)workerThreadPool).decrementNumberOfAvailableThreads(); |
| throw ie; |
| } |
| } |
| |
| public void setThreadPool(ThreadPool workerThreadPool) { |
| this.workerThreadPool = workerThreadPool; |
| } |
| |
| public ThreadPool getThreadPool() { |
| return workerThreadPool; |
| } |
| |
| /** |
| * Returns the total number of Work items added to the Queue. |
| * This method is unsynchronized and only gives a snapshot of the |
| * state when it is called |
| */ |
| public long totalWorkItemsAdded() { |
| return workItemsAdded; |
| } |
| |
| /** |
| * Returns the total number of Work items in the Queue to be processed |
| * This method is unsynchronized and only gives a snapshot of the |
| * state when it is called |
| */ |
| public int workItemsInQueue() { |
| return theWorkQueue.size(); |
| } |
| |
| public synchronized long averageTimeInQueue() { |
| return (totalTimeInQueue/workItemsDequeued); |
| } |
| |
| public String getName() { |
| return name; |
| } |
| } |
| |
| // End of file. |