Package org.objectweb.howl.log.xa

Source Code of org.objectweb.howl.log.xa.XAWorker

/*
* JOnAS: Java(TM) Open Application Server
* Copyright (C) 2004 Bull S.A.
* All rights reserved.
*
* Contact: howl@objectweb.org
*
* This software is licensed under the BSD license.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
*   * Redistributions of source code must retain the above copyright
*     notice, this list of conditions and the following disclaimer.
*    
*   * 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.
*    
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS 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 COPYRIGHT OWNER OR
* 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.
*
* ------------------------------------------------------------------------------
* $Id: XAWorker.java,v 1.7 2005/06/23 23:28:15 girouxm Exp $
* ------------------------------------------------------------------------------
*/
package org.objectweb.howl.log.xa;

import org.objectweb.howl.log.LogException;
import org.objectweb.howl.log.TestDriver;
import org.objectweb.howl.log.TestWorker;
import org.objectweb.howl.log.xa.XACommittingTx;
import org.objectweb.howl.log.xa.XALogger;

/**
* The XAWorker class is used by test cases to write
* XA 2-phase-commit record sequences to a log.
*
* @author Michael Giroux
*/
public class XAWorker extends TestWorker {
  /**
   * Constructor upcasts the TestWorker.log member to an
   * XALogger for these tests.
   */
  final XALogger xalog;
 
  /**
   * constructs an XAWorker thread instance.
   *
   * @param driver provides access to configuration information
   * and other features supplied by the test driver.
   */
  public XAWorker(TestDriver driver)
  {
    super(driver);
    xalog = (XALogger)log;
  }
 
 
  public XACommittingTx logCommit(int id)
      throws LogException, Exception
  {
    // journalize COMMIT record
    updateRecordData(id);
    bytesLogged += commitData.length;
    return xalog.putCommit(commitDataRecord);
  }
 
  public void logDone(XACommittingTx tx)
  throws LogException, Exception
  {
    // journalize FORGET record
    xalog.putDone(doneDataRecord, tx);
    bytesLogged += doneData.length;
    ++transactions;
  }
 
  public void run()
  {
    // recuce count if this worker is doing delays between COMMIT and DONE
    if (delayBeforeDone > 0)
      count = 4;

    try
    {
      // wait till all worker threads have started
      driver.getStartBarrier().barrier();
     
      // generate the log records
      for (int i = 1; i <= count; ++i)
      {
        long startTime = System.currentTimeMillis();
        XACommittingTx tx = logCommit(i);
        if (delayBeforeDone > 0) {
          sleep(delayBeforeDone);
        }
        logDone(tx);
        latency += System.currentTimeMillis() - startTime;
      }
    } catch (Exception e) {
      exception = e;
      System.err.println(e.toString());
    } finally {
      // notify driver that this thread has finishe its work
      driver.getStopBarrier().release();
    }
  }
}
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