org.eclipse.linuxtools.tmf.tests/stubs/org/eclipse/linuxtools/tmf/component/TmfSyntheticEventProviderStub.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2010 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.component;
  14
  15 import java.util.concurrent.TimeUnit;
  16
  17 import org.eclipse.linuxtools.tmf.event.TmfEvent;
  18 import org.eclipse.linuxtools.tmf.event.TmfSyntheticEventStub;
  19 import org.eclipse.linuxtools.tmf.event.TmfTimeRange;
  20 import org.eclipse.linuxtools.tmf.request.ITmfDataRequest;
  21 import org.eclipse.linuxtools.tmf.request.ITmfEventRequest;
  22 import org.eclipse.linuxtools.tmf.request.TmfEventRequest;
  23 import org.eclipse.linuxtools.tmf.trace.ITmfContext;
  24 import org.eclipse.linuxtools.tmf.trace.TmfContext;
  25
  26 /**
  27  * <b><u>TmfSyntheticEventProviderStub</u></b>
  28  * <p>
  29  * TODO: Implement me. Please.
  30  */
  31 public class TmfSyntheticEventProviderStub extends TmfEventProvider<TmfSyntheticEventStub> {
  32
  33     public static final int BLOCK_SIZE = 100;
  34     public static final int NB_EVENTS  = 1000;
  35
  36     public TmfSyntheticEventProviderStub() {
  37                 super("TmfSyntheticEventProviderStub", TmfSyntheticEventStub.class);
  38         }
  39
  40         @SuppressWarnings("unchecked")
  41         @Override
  42         public ITmfContext armRequest(final ITmfDataRequest<TmfSyntheticEventStub> request) {
  43
  44                 // Get the TmfSyntheticEventStub provider
  45                 ITmfDataProvider<TmfEvent>[] eventProviders = (ITmfDataProvider<TmfEvent>[]) TmfProviderManager.getProviders(TmfEvent.class, TmfEventProviderStub.class);
  46                 ITmfDataProvider<TmfEvent> provider = eventProviders[0];
  47
  48                 // make sure we have the right type of request
  49                 if (!(request instanceof ITmfEventRequest<?>)) {
  50                         request.cancel();
  51                         return null;
  52                 }
  53
  54                 TmfEventRequest<TmfSyntheticEventStub> eventRequest = (TmfEventRequest<TmfSyntheticEventStub>) request;
  55         TmfTimeRange range = eventRequest.getRange();
  56         final TmfEventRequest<TmfEvent> subRequest =
  57                 new TmfEventRequest<TmfEvent>(TmfEvent.class, range, NB_EVENTS, BLOCK_SIZE) {
  58                 @Override
  59                 public void handleData() {
  60                         TmfEvent[] events = getData();
  61                         if (events.length > 0) {
  62                                 for (TmfEvent e : events) {
  63                                         handleIncomingData(e);
  64                                 }
  65                         } else {
  66                                 request.done();
  67                         }
  68                 }
  69                 };
  70         provider.sendRequest(subRequest);
  71
  72         // Return a dummy context
  73         return new TmfContext();
  74         }
  75
  76         // Queue 2 synthetic events per base event
  77         private void handleIncomingData(TmfEvent e) {
  78                 queueResult(new TmfSyntheticEventStub(e));
  79                 queueResult(new TmfSyntheticEventStub(e));
  80         }
  81
  82         private static final int TIMEOUT = 10000;
  83
  84         @Override
  85         public TmfSyntheticEventStub getNext(ITmfContext context) {
  86                 TmfSyntheticEventStub data = null;
  87                 try {
  88                         data = fDataQueue.poll(TIMEOUT, TimeUnit.MILLISECONDS);
  89                         if (data == null) {
  90                                 throw new InterruptedException();
  91                         }
  92                 }
  93                 catch (InterruptedException e) {
  94                 }
  95                 return data;
  96         }
  97
  98         public void queueResult(TmfSyntheticEventStub data) {
  99                 boolean ok = false;
 100                 try {
 101                         ok = fDataQueue.offer(data, TIMEOUT, TimeUnit.MILLISECONDS);
 102                         if (!ok) {
 103                                 throw new InterruptedException();
 104                         }
 105                 }
 106                 catch (InterruptedException e) {
 107                 }
 108         }
 109
 110 }