org.eclipse.linuxtools.lttng.ui/src/org/eclipse/linuxtools/lttng/ui/views/histogram/HistogramRequest.java

   1 /*******************************************************************************
   2  * Copyright (c) 2009, 2011 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  *   William Bourque - Initial API and implementation
  11  *   Yuriy Vashchuk - Heritage correction.
  12  *   Francois Chouinard - Cleanup and refactoring
  13  *******************************************************************************/
  14
  15 package org.eclipse.linuxtools.lttng.ui.views.histogram;
  16
  17 import org.eclipse.linuxtools.lttng.LttngConstants;
  18 import org.eclipse.linuxtools.lttng.event.LttngEvent;
  19 import org.eclipse.linuxtools.tmf.event.TmfTimeRange;
  20 import org.eclipse.linuxtools.tmf.request.ITmfDataRequest;
  21 import org.eclipse.linuxtools.tmf.request.TmfEventRequest;
  22
  23 /**
  24  * <b><u>HistogramRequest</u></b>
  25  * <p>
  26  */
  27 public class HistogramRequest extends TmfEventRequest<LttngEvent> {
  28
  29     // ------------------------------------------------------------------------
  30     // Attributes
  31     // ------------------------------------------------------------------------
  32
  33     private final Histogram fHistogram;
  34
  35     // ------------------------------------------------------------------------
  36     // Constructor
  37     // ------------------------------------------------------------------------
  38
  39     public HistogramRequest(Histogram histogram, TmfTimeRange range, int nbEvents, ITmfDataRequest.ExecutionType execType) {
  40         super(LttngEvent.class, range, nbEvents, LttngConstants.DEFAULT_BLOCK_SIZE, execType);
  41         fHistogram = histogram;
  42     }
  43
  44     public HistogramRequest(Histogram histogram, TmfTimeRange range, ITmfDataRequest.ExecutionType execType) {
  45         this(histogram, range, ALL_DATA, execType);
  46     }
  47
  48     // ------------------------------------------------------------------------
  49     // TmfEventRequest
  50     // ------------------------------------------------------------------------
  51
  52     @Override
  53     public void handleData(LttngEvent event) {
  54         super.handleData(event);
  55         if (event != null) {
  56             long timestamp = event.getTimestamp().getValue();
  57             fHistogram.countEvent(timestamp);
  58         }
  59     }
  60
  61     @Override
  62     public void handleCompleted() {
  63         fHistogram.refresh();
  64         super.handleCompleted();
  65     }
  66
  67     @Override
  68     public void handleCancel() {
  69         fHistogram.refresh();
  70         super.handleCancel();
  71     }
  72
  73 }