+/*******************************************************************************
+ * Copyright (c) 2009, 2011 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
+ *******************************************************************************/
+
package org.eclipse.linuxtools.lttng.ui.views.histogram;
-import org.eclipse.linuxtools.lttng.event.LttngEvent;
-import org.eclipse.linuxtools.tmf.event.TmfEvent;
-import org.eclipse.linuxtools.tmf.event.TmfTimeRange;
-import org.eclipse.linuxtools.tmf.request.TmfEventRequest;
+import org.eclipse.linuxtools.lttng.core.LttngConstants;
+import org.eclipse.linuxtools.lttng.core.event.LttngEvent;
+import org.eclipse.linuxtools.tmf.core.event.TmfTimeRange;
+import org.eclipse.linuxtools.tmf.core.request.ITmfDataRequest;
+import org.eclipse.linuxtools.tmf.core.request.TmfEventRequest;
+/**
+ * <b><u>HistogramRequest</u></b>
+ * <p>
+ */
public class HistogramRequest extends TmfEventRequest<LttngEvent> {
-
- final static int MAX_EVENTS_PER_REQUEST = 1;
- final static int REDRAW_EVERY_NB_EVENTS = 10000;
-
- private HistogramContent histogramContent = null;
-
- private int lastPos = 0;
- private long lastRangeTime = 0L;
- private long nbEventsInRange = 1;
-
- private int nbPosNotEmpty = 1;
- private int nbEventRead = 0;
-
- private TraceCanvas parentCanvas = null;
-
- private boolean requestCompleted = false;
-
- @SuppressWarnings("unchecked")
- public HistogramRequest(Class<? extends TmfEvent> dataType, TmfTimeRange range, int nbRequested, HistogramContent newContent, TraceCanvas newParentCanvas, Long timeInterval) {
- super((Class<LttngEvent>)dataType, range, nbRequested, MAX_EVENTS_PER_REQUEST);
-
- // *** FIXME ***
- // This does not work! The request won't be processed or the number of events returned is wrong!
- // We cannot use this !
- //super((Class<LttngEvent>)dataType, range);
-
- histogramContent = newContent;
- parentCanvas = newParentCanvas;
-
- histogramContent.resetContentData();
- histogramContent.setStartTime(range.getStartTime().getValue());
- histogramContent.setEndTime(range.getEndTime().getValue());
- histogramContent.setIntervalTime(timeInterval);
- histogramContent.resetTable();
-
- lastRangeTime = histogramContent.getStartTime();
+
+ // ------------------------------------------------------------------------
+ // Attributes
+ // ------------------------------------------------------------------------
+
+ private final Histogram fHistogram;
+
+ // ------------------------------------------------------------------------
+ // Constructor
+ // ------------------------------------------------------------------------
+
+ public HistogramRequest(Histogram histogram, TmfTimeRange range, int rank, int nbEvents, ITmfDataRequest.ExecutionType execType) {
+ super(LttngEvent.class, range, rank, nbEvents, LttngConstants.DEFAULT_BLOCK_SIZE, execType);
+ fHistogram = histogram;
}
- @Override
- public void handleData() {
- TmfEvent[] result = getData();
- TmfEvent[] evt = new TmfEvent[1];
-
- evt[0] = (result.length > 0) ? result[0] : null;
-
- // *** FIXME ***
- // *** EVIL BUG ***
- // The request by timerange only does not work! (see constructor above)
- // However, the request with number of events will loop until it reach its number or EOF
- // We have to filter out ourself the extra useless events!
- //
- if ( (evt[0] != null) && (requestCompleted == false) ) {
- LttngEvent tmpEvent = (LttngEvent)evt[0];
-
- // This check is linked to the evil fix mentionned above
- if ( tmpEvent.getTimestamp().getValue() <= histogramContent.getEndTime() ) {
-
- long distance = ( tmpEvent.getTimestamp().getValue() - lastRangeTime );
-
- if ( distance > histogramContent.getIntervalTime() ) {
-
- histogramContent.getElementByIndex(lastPos).intervalNbEvents = nbEventsInRange;
- lastRangeTime = tmpEvent.getTimestamp().getValue();
-
- lastPos = (int)((lastRangeTime - histogramContent.getStartTime()) / histogramContent.getIntervalTime() );
-
- // *** HACK ***
- // Because of the threads, weird phenomenons seem to happen here, like a position after the
- // element range because another request was issued.
- // This enforce the position but may result in slightly inconsistent result (i.e. a weird misplaced bar sometime).
- if ( lastPos < 0 ) {
- lastPos = 0;
- }
- else if ( lastPos >= histogramContent.getNbElement() ) {
- lastPos = (histogramContent.getNbElement()-1);
- }
-
- histogramContent.getElementByIndex(lastPos).firstIntervalTimestamp = lastRangeTime;
- histogramContent.setReadyUpToPosition(lastPos);
-
- nbPosNotEmpty++;
- nbEventsInRange = 1;
- }
- else {
- nbEventsInRange++;
- if ( nbEventsInRange > histogramContent.getHeighestEventCount() ) {
- histogramContent.setHeighestEventCount(nbEventsInRange);
- }
- }
-
- nbEventRead++;
-
- if ( nbEventRead % REDRAW_EVERY_NB_EVENTS == 0 ) {
- redrawAsyncronously();
- }
- }
- else {
- // *** FIXME ***
- // *** EVIL FIX ***
- // Because of the other evil bug (see above), we have to ignore extra useless events we will get
- // However, we might be far away from the end so we better start a redraw now
- redrawAsyncronously();
- requestCompleted = true;
-
- // Althought it won't do anything, try to call control functions to stop the request
- done();
- cancel();
- fail();
- }
- }
+ public HistogramRequest(Histogram histogram, TmfTimeRange range, ITmfDataRequest.ExecutionType execType) {
+ this(histogram, range, 0, ALL_DATA, execType);
}
-
- @Override
- public void handleCompleted() {
- redrawAsyncronously();
+
+ public HistogramRequest(Histogram histogram, TmfTimeRange range, int rank, ITmfDataRequest.ExecutionType execType) {
+ this(histogram, range, rank, ALL_DATA, execType);
}
-
+
+ // ------------------------------------------------------------------------
+ // TmfEventRequest
+ // ------------------------------------------------------------------------
+
@Override
- public void handleSuccess() {
- // Nothing different from completed.
+ public void handleData(LttngEvent event) {
+ super.handleData(event);
+ if (event != null) {
+ long timestamp = event.getTimestamp().getValue();
+ fHistogram.countEvent(timestamp);
+ }
}
-
+
@Override
- public void handleFailure() {
- // Nothing different from cancel.
+ public void handleCompleted() {
+ fHistogram.refresh();
+ super.handleCompleted();
}
-
+
@Override
public void handleCancel() {
- redrawAsyncronously();
- requestCompleted = true;
- }
-
-
- public void updateEventsInfo() {
- int averageNumberOfEvents = nbEventRead / nbPosNotEmpty;
- histogramContent.setAverageNumberOfEvents(averageNumberOfEvents);
- histogramContent.recalculateEventHeight();
+ fHistogram.refresh();
+ super.handleCancel();
}
-
- public void redrawAsyncronously() {
- updateEventsInfo();
- // canvas redraw is already asynchronous
- parentCanvas.redrawAsynchronously();
- }
-
+
}
projects / deliverable / tracecompass.git / blobdiff