org.eclipse.linuxtools.tmf.tests/stubs/org/eclipse/linuxtools/tmf/request/TmfRequestHandlerStub.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009 Ericsson
   3  *
   4  * All rights reserved. This program and the accompanying materials are
   5  * made available under the terms of the Eclipse Public License v1.0 which
   6  * accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *   Francois Chouinard - Initial API and implementation
  11  *******************************************************************************/
  12
  13 package org.eclipse.linuxtools.tmf.request;
  14
  15 import java.io.File;
  16 import java.io.IOException;
  17 import java.util.Vector;
  18
  19 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  20 import org.eclipse.linuxtools.tmf.event.TmfTimestamp;
  21 import org.eclipse.linuxtools.tmf.trace.TmfTraceStub;
  22 import org.eclipse.linuxtools.tmf.trace.ITmfTrace.TmfTraceContext;
  23
  24 /**
  25  * <b><u>TmfRequestHandlerStub</u></b>
  26  * <p>
  27  * TODO: Implement me. Please.
  28  */
  29 public class TmfRequestHandlerStub implements ITmfRequestHandler<TmfEvent> {
  30
  31     // The test file
  32     private static final String TEST_STREAM = "M-Test-100K";
  33
  34     // A constant to limit the number of events for the tests
  35     public static final int MAX_GENERATED_EVENTS = 1000;
  36
  37     private TmfTraceStub fTrace;
  38
  39     public TmfRequestHandlerStub() throws IOException {
  40         String directory = new File(".").getCanonicalPath() + File.separator + "testfiles";
  41         String filename  = directory + File.separator + TEST_STREAM;
  42         fTrace = new TmfTraceStub(filename);
  43     }
  44
  45     /* (non-Javadoc)
  46      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfRequestHandler#processRequest(org.eclipse.linuxtools.tmf.eventlog.TmfEventRequest, boolean)
  47      */
  48     public void processRequest(final TmfDataRequest<TmfEvent> request, boolean waitForCompletion) {
  49
  50         Thread thread = new Thread() {
  51             @Override
  52             public void run() {
  53                 TmfTimestamp startTime = request.getRange().getStartTime();
  54                 TmfTimestamp endTime   = request.getRange().getEndTime();
  55                 int blockSize = request.getBlockize();
  56
  57                 int nbRequestedEvents = request.getNbRequestedItems();
  58                 if (nbRequestedEvents <= 0) {
  59                     nbRequestedEvents = MAX_GENERATED_EVENTS;
  60                 }
  61
  62                 Vector<TmfEvent> events = new Vector<TmfEvent>();
  63                 int nbEvents = 0;
  64                 TmfTraceContext context = new TmfTraceContext(null);
  65                 TmfEvent event = fTrace.getEvent(context, startTime);
  66                 while (!request.isCancelled() && nbEvents < nbRequestedEvents &&
  67                        event != null && event.getTimestamp().compareTo(endTime, false) <= 0 )
  68                 {
  69                     events.add(event);
  70                     if (++nbEvents % blockSize == 0) {
  71                         TmfEvent[] result = new TmfEvent[events.size()];
  72                         events.toArray(result);
  73                         request.setData(result);
  74                         request.handleData();
  75                         events.removeAllElements();
  76                     }
  77                     event = fTrace.getNextEvent(context);
  78                 }
  79                 TmfEvent[] result = new TmfEvent[events.size()];
  80                 events.toArray(result);
  81
  82                 request.setData(result);
  83                 request.handleData();
  84                 request.done();
  85             }
  86         };
  87         thread.start();
  88
  89         if (waitForCompletion) {
  90             request.waitForCompletion();
  91         }
  92     }
  93
  94 }