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.ITmfEventParser;
  22 import org.eclipse.linuxtools.tmf.trace.TmfEventParserStub;
  23 import org.eclipse.linuxtools.tmf.trace.TmfEventStreamStub;
  24 import org.eclipse.linuxtools.tmf.trace.ITmfTrace.StreamContext;
  25
  26 /**
  27  * <b><u>TmfRequestHandlerStub</u></b>
  28  * <p>
  29  * TODO: Implement me. Please.
  30  */
  31 public class TmfRequestHandlerStub implements ITmfRequestHandler<TmfEvent> {
  32
  33     // The test file
  34     private static final String TEST_STREAM = "M-Test-100K";
  35
  36     // A constant to limit the number of events for the tests
  37     public static final int MAX_GENERATED_EVENTS = 1000;
  38
  39     private ITmfEventParser fParser;
  40     private TmfEventStreamStub fStream;
  41
  42     public TmfRequestHandlerStub() throws IOException {
  43         String directory = new File(".").getCanonicalPath() + File.separator + "testfiles";
  44         String filename  = directory + File.separator + TEST_STREAM;
  45
  46         fParser = new TmfEventParserStub();
  47         fStream = new TmfEventStreamStub(filename, fParser);
  48     }
  49
  50     /* (non-Javadoc)
  51      * @see org.eclipse.linuxtools.tmf.eventlog.ITmfRequestHandler#processRequest(org.eclipse.linuxtools.tmf.eventlog.TmfEventRequest, boolean)
  52      */
  53     public void processRequest(final TmfDataRequest<TmfEvent> request, boolean waitForCompletion) {
  54
  55         Thread thread = new Thread() {
  56             @Override
  57             public void run() {
  58                 TmfTimestamp startTime = request.getRange().getStartTime();
  59                 TmfTimestamp endTime   = request.getRange().getEndTime();
  60                 int blockSize = request.getBlockize();
  61
  62                 int nbRequestedEvents = request.getNbRequestedItems();
  63                 if (nbRequestedEvents <= 0) {
  64                     nbRequestedEvents = MAX_GENERATED_EVENTS;
  65                 }
  66
  67                 Vector<TmfEvent> events = new Vector<TmfEvent>();
  68                 int nbEvents = 0;
  69                 StreamContext context = new StreamContext(null);
  70                 TmfEvent event = fStream.getEvent(context, startTime);
  71                 while (!request.isCancelled() && nbEvents < nbRequestedEvents &&
  72                        event != null && event.getTimestamp().compareTo(endTime, false) <= 0 )
  73                 {
  74                     events.add(event);
  75                     if (++nbEvents % blockSize == 0) {
  76                         TmfEvent[] result = new TmfEvent[events.size()];
  77                         events.toArray(result);
  78                         request.setData(result);
  79                         request.handleData();
  80                         events.removeAllElements();
  81                     }
  82                     event = fStream.getNextEvent(context);
  83                 }
  84                 TmfEvent[] result = new TmfEvent[events.size()];
  85                 events.toArray(result);
  86
  87                 request.setData(result);
  88                 request.handleData();
  89                 request.done();
  90             }
  91         };
  92         thread.start();
  93
  94         if (waitForCompletion) {
  95             request.waitForCompletion();
  96         }
  97     }
  98
  99 }