Mercurial > hg > blitz_condensed
view src/com/go/trove/util/tq/TransactionQueueEvent.java @ 34:6f68e94c1fb8 default tip
Add CondensedStats monitoring utility, equivalent to vmstat
author | Dominic Cleal <dominic-cleal@cdo2.com> |
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date | Thu, 05 Aug 2010 11:07:25 +0100 |
parents | 3dc0c5604566 |
children |
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/* ==================================================================== * Trove - Copyright (c) 1997-2000 Walt Disney Internet Group * ==================================================================== * The Tea Software License, Version 1.1 * * Copyright (c) 2000 Walt Disney Internet Group. All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * 3. The end-user documentation included with the redistribution, * if any, must include the following acknowledgment: * "This product includes software developed by the * Walt Disney Internet Group (http://opensource.go.com/)." * Alternately, this acknowledgment may appear in the software itself, * if and wherever such third-party acknowledgments normally appear. * * 4. The names "Tea", "TeaServlet", "Kettle", "Trove" and "BeanDoc" must * not be used to endorse or promote products derived from this * software without prior written permission. For written * permission, please contact opensource@dig.com. * * 5. Products derived from this software may not be called "Tea", * "TeaServlet", "Kettle" or "Trove", nor may "Tea", "TeaServlet", * "Kettle", "Trove" or "BeanDoc" appear in their name, without prior * written permission of the Walt Disney Internet Group. * * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE WALT DISNEY INTERNET GROUP OR ITS * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * ==================================================================== * * For more information about Tea, please see http://opensource.go.com/. */ package com.go.trove.util.tq; import java.util.EventObject; import java.util.Date; /****************************************************************************** * An event that contains information from a {@link TransactionQueue}. * TransactionQueueEvents can be received by implementing a * {@link TransactionQueueListener}. * * @author Brian S O'Neill * @version * <!--$$Revision: 1.1 $-->, <!--$$JustDate:--> 9/25/00 <!-- $--> */ public class TransactionQueueEvent extends EventObject { private Transaction mTransaction; private Throwable mThrowable; private long mTimestampMillis; private long mStageDuration; private transient Date mTimestamp; public TransactionQueueEvent(TransactionQueue source, Transaction transaction) { super(source); mTransaction = transaction; mTimestampMillis = System.currentTimeMillis(); } public TransactionQueueEvent(TransactionQueue source, Transaction transaction, Throwable throwable) { super(source); mTransaction = transaction; mThrowable = throwable; mTimestampMillis = System.currentTimeMillis(); } /** * Copies the given event, but gives it a new timestamp and computes a * stage duration. */ public TransactionQueueEvent(TransactionQueueEvent event) { super(event.getSource()); mTransaction = event.mTransaction; mThrowable = event.mThrowable; mStageDuration = (mTimestampMillis = System.currentTimeMillis()) - event.mTimestampMillis; } /** * Copies the given event, but gives it a different throwable, a new * timestamp and computes a stage duration. */ public TransactionQueueEvent(TransactionQueueEvent event, Throwable throwable) { super(event.getSource()); mTransaction = event.mTransaction; mThrowable = throwable; mStageDuration = (mTimestampMillis = System.currentTimeMillis()) - event.mTimestampMillis; } public TransactionQueue getTransactionQueue() { return (TransactionQueue)getSource(); } /** * Returns the date and time of this event. */ public Date getTimestamp() { if (mTimestamp == null) { mTimestamp = new Date(mTimestampMillis); } return mTimestamp; } /** * Returns the date and time of this event as milliseconds since 1970. */ public long getTimestampMillis() { return mTimestampMillis; } /** * Returns the amount of time, in milliseconds, that the transaction was * in a TransactionQueue stage. The implied meaning of this value depends * on how this event was passed to a listener. * * @see TransactionQueueListener */ public long getStageDuration() { return mStageDuration; } /** * Returns the transaction that was being processed by the * TransactionQueue. */ public Transaction getTransaction() { return mTransaction; } /** * Returns the exception that occurred while servicing the transaction, if * applicable. */ public Throwable getThrowable() { return mThrowable; } }