/*******************************************************************************
- * Copyright (c) 2009 Ericsson
+ * 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
*
* 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.ITmfDataRequest;
-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>
- * Request class, to perform a request to TMF for the histograms.
- * <p>
*/
public class HistogramRequest extends TmfEventRequest<LttngEvent> {
- protected HistogramContent histogramContent = null;
-
- protected int lastInterval = 0;
- protected long lastRangeTime = 0L;
- protected long nbEventsInInterval = 0L;
-
- protected int nbIntervalNotEmpty = 1;
- protected int nbEventRead = 0;
-
- protected int lastDrawPosition = 0;
-
- protected HistogramCanvas parentCanvas = null;
-
- /**
- * Constructor for HistogramRequest.<p>
- * Prepare the request in TMF and reset the histogram content.
- *
- * @param range Range of the request.
- * @param nbRequested Nb events requested. Can be "Infinity" for all.
- * @param newParentCanvas HistogramCanvas related to the request.
- * @param timeInterval Time interval to consider (i.e. : 1 interval is 1 bar in the histogram)
- *
- * @see org.eclipse.linuxtools.tmf.request.TmfEventRequest
- */
- public HistogramRequest(TmfTimeRange range, int nbRequested, HistogramCanvas newParentCanvas, long timeInterval, ITmfDataRequest.ExecutionType execType) {
- super((Class<LttngEvent>)LttngEvent.class, range, nbRequested, HistogramConstant.MAX_EVENTS_PER_READ, execType);
-
- // *** 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);
-
- parentCanvas = newParentCanvas;
- histogramContent = parentCanvas.getHistogramContent();
-
- // Reset the content of the HistogramContent... the given data better be valid or this will fail.
- histogramContent.clearContentData();
- histogramContent.resetTable(range.getStartTime().getValue(), range.getEndTime().getValue(), timeInterval);
-
- lastRangeTime = range.getStartTime().getValue();
-
- // Notify the UI even before the request started, so we set the timestamp already.
- parentCanvas.notifyParentUpdatedInformationAsynchronously();
+
+ // ------------------------------------------------------------------------
+ // 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;
}
-
- /**
- * HandleData function : will be called by TMF each time a new event is receive for the request.<p>
- * Calculation for the content is done here.
- */
- @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) {
-
- LttngEvent tmpEvent = (LttngEvent)evt[0];
-
- // This check is linked to the evil fix mentionned above
- if ( ( tmpEvent.getTimestamp().getValue() >= histogramContent.getStartTime() ) &&
- ( tmpEvent.getTimestamp().getValue() <= histogramContent.getEndTime() ) )
- {
-
- // Distance (in time) between this event and the last one we read
- long distance = ( tmpEvent.getTimestamp().getValue() - lastRangeTime );
-
- // Check if we changed of interval (the distance is higher than the interval time)
- if ( distance > histogramContent.getElementsTimeInterval() ) {
-
- histogramContent.getElementByIndex(lastInterval).intervalNbEvents = nbEventsInInterval;
- lastRangeTime = tmpEvent.getTimestamp().getValue();
-
- // * NOTE *
- // We can skip several interval at once, so we need to find what was our interval now
- lastInterval = (int)((lastRangeTime - histogramContent.getStartTime()) / histogramContent.getElementsTimeInterval() );
-
- // *** 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 ( lastInterval < 0 ) {
- lastInterval = 0;
- }
- else if ( lastInterval >= histogramContent.getNbElement() ) {
- lastInterval = (histogramContent.getNbElement()-1);
- }
-
- // * NOTE *
- // We save the time we have here. This mean only the FIRST time read in an interval will be saved.
- histogramContent.getElementByIndex(lastInterval).firstIntervalTimestamp = lastRangeTime;
- histogramContent.setReadyUpToPosition(lastInterval);
-
- nbIntervalNotEmpty++;
- nbEventsInInterval = 1L;
- }
- // We are still in the same interval, just keep counting
- else {
- nbEventsInInterval++;
- }
-
- if ( nbEventsInInterval > histogramContent.getHeighestEventCount() ) {
- histogramContent.setHeighestEventCount(nbEventsInInterval);
- }
- nbEventRead++;
-
- // Call an asynchronous redraw every REDRAW_EVERY_NB_EVENTS events
- // That way we don't need to wait until to end to have something on the screen
- if ( nbEventRead % HistogramConstant.REDRAW_EVERY_NB_EVENTS == 0 ) {
- redrawAsyncronously();
- }
- }
- }
- // We got a null event! This mean we reach the end of the request.
- // Save the last interval we had, so we won't miss the very last events at the end.
- else {
- // Save the last events
- histogramContent.getElementByIndex(lastInterval).intervalNbEvents = nbEventsInInterval;
- // We reached the end of the request, so assume we fill up the content as well
- histogramContent.setReadyUpToPosition(histogramContent.getNbElement());
-
- // If the interval wasn't null, count this as a "non empty" interval
- if (nbEventsInInterval > 0) {
- nbIntervalNotEmpty++;
- }
- }
+
+ public HistogramRequest(Histogram histogram, TmfTimeRange range, ITmfDataRequest.ExecutionType execType) {
+ this(histogram, range, 0, ALL_DATA, execType);
}
-
- /**
- * Function that is called when the request completed (successful or not).<p>
- * Update information and redraw the screen.
- */
- @Override
- public void handleCompleted() {
- parentCanvas.notifyParentUpdatedInformationAsynchronously();
- redrawAsyncronously();
+
+ public HistogramRequest(Histogram histogram, TmfTimeRange range, int rank, ITmfDataRequest.ExecutionType execType) {
+ this(histogram, range, rank, ALL_DATA, execType);
}
-
- /**
- * Function that is called when the request completed successfully.<p>
- */
+
+ // ------------------------------------------------------------------------
+ // 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);
+ }
}
-
- /**
- * Function that is called when the request completed in failure.<p>
- */
+
@Override
- public void handleFailure() {
- // Nothing different from cancel.
+ public void handleCompleted() {
+ fHistogram.refresh();
+ super.handleCompleted();
}
-
- /**
- * Function that is called when the request was cancelled.<p>
- * Redraw and set the requestCompleted flag to true;
- */
+
@Override
public void handleCancel() {
- redrawAsyncronously();
- }
-
- /**
- * Update the HistogramContent with the latest information.<p>
- * This will perform some calculation that might be a bit harsh so it should'nt be called too often.
- */
- public void updateEventsInfo() {
- // *** Note ***
- // The average number of event is calculated while skipping empty interval if asked
- int averageNumberOfEvents = 0;
- if ( HistogramConstant.SKIP_EMPTY_INTERVALS_WHEN_CALCULATING_AVERAGE ) {
- averageNumberOfEvents = (int)Math.ceil((double)nbEventRead / (double)nbIntervalNotEmpty);
- }
- else {
- averageNumberOfEvents = (int)Math.ceil((double)nbEventRead / (double)histogramContent.getNbElement());
- }
-
- histogramContent.setAverageNumberOfEvents(averageNumberOfEvents);
-
- // It is possible that the height factor didn't change;
- // If not, we only need to redraw the updated section, no the whole content
- // Save the actual height, recalculate the height and check if there was any changes
- double previousHeightFactor = histogramContent.getHeightFactor();
- histogramContent.recalculateHeightFactor();
- if ( histogramContent.getHeightFactor() != previousHeightFactor ) {
- histogramContent.recalculateEventHeight();
- }
- else {
- histogramContent.recalculateEventHeightInInterval(lastDrawPosition, histogramContent.getReadyUpToPosition());
- }
-
- lastDrawPosition = histogramContent.getReadyUpToPosition();
+ fHistogram.refresh();
+ super.handleCancel();
}
-
- /**
- * Perform an asynchonous redraw of the screen.
- */
- public void redrawAsyncronously() {
- updateEventsInfo();
- // Canvas redraw is already asynchronous
- parentCanvas.redrawAsynchronously();
- }
-
+
}
projects / deliverable / tracecompass.git / blobdiff