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/*******************************************************************************
* Copyright (c) 2009, 2011, 2012 Ericsson
*
* All rights reserved. This program and the accompanying materials are
* made available under the terms of the Eclipse Public License v1.0 which
* accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* William Bourque - Initial API and implementation
* Yuriy Vashchuk - Heritage correction.
* Francois Chouinard - Cleanup and refactoring
* Francois Chouinard - Moved from LTTng to TMF
*******************************************************************************/
package org.eclipse.linuxtools.tmf.ui.views.histogram;
import org.eclipse.linuxtools.tmf.core.event.ITmfEvent;
import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange;
import org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest;
import org.eclipse.linuxtools.tmf.core.request.TmfEventRequest;
import org.eclipse.linuxtools.tmf.core.trace.ITmfTrace;
/**
* Class to request events for given time range from a trace to fill a HistogramDataModel and HistogramView.
*
* @version 1.0
* @author Francois Chouinard
* <p>
*/
public class HistogramRequest extends TmfEventRequest<ITmfEvent> {
// ------------------------------------------------------------------------
// Attributes
// ------------------------------------------------------------------------
/**
* The histogram data model to fill.
*/
protected final HistogramDataModel fHistogram;
// ------------------------------------------------------------------------
// Constructor
// ------------------------------------------------------------------------
/**
* Constructor
*
* @param histogram
* The histogram data model
* @param range
* The time range to request data
* @param rank
* The index of the first event to retrieve
* @param nbEvents
* The number of events requested
* @param blockSize
* The number of events per block
* @param execType
* The requested execution priority
*
*/
public HistogramRequest(HistogramDataModel histogram, TmfTimeRange range,
int rank, int nbEvents, int blockSize,
ITmfDataRequest.ExecutionType execType) {
super(ITmfEvent.class, range, rank, nbEvents,
(blockSize > 0) ? blockSize : ITmfTrace.DEFAULT_TRACE_CACHE_SIZE,
execType);
fHistogram = histogram;
}
// ------------------------------------------------------------------------
// TmfEventRequest
// ------------------------------------------------------------------------
/**
* Handle the event from the trace by updating the histogram data model.
*
* @param event a event from the trace
* @see org.eclipse.linuxtools.tmf.core.request.TmfDataRequest#handleData(org.eclipse.linuxtools.tmf.core.event.ITmfEvent)
*/
@Override
public void handleData(ITmfEvent event) {
super.handleData(event);
if (event != null) {
long timestamp = event.getTimestamp().normalize(0, -9).getValue();
fHistogram.countEvent(getNbRead(), timestamp);
}
}
/**
* Complete the request. It also notifies the histogram model about the completion.
*
* @see org.eclipse.linuxtools.tmf.core.request.TmfDataRequest#handleCompleted()
*/
@Override
public void handleCompleted() {
fHistogram.complete();
super.handleCompleted();
}
}
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