/*******************************************************************************
- * Copyright (c) 2011-2012 Ericsson, Ecole Polytechnique de Montreal and others
+ * Copyright (c) 2011, 2013 Ericsson, Ecole Polytechnique de Montreal and others
*
* 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: Matthew Khouzam - Initial API and implementation
- * Contributors: Alexandre Montplaisir - Initial API and implementation
+ * Contributors:
+ * Matthew Khouzam - Initial API and implementation
+ * Alexandre Montplaisir - Initial API and implementation
*******************************************************************************/
package org.eclipse.linuxtools.ctf.core.trace;
+import java.util.ArrayList;
import java.util.Collection;
+import java.util.List;
import java.util.PriorityQueue;
import java.util.Set;
-import java.util.Vector;
import org.eclipse.linuxtools.ctf.core.event.EventDefinition;
import org.eclipse.linuxtools.internal.ctf.core.Activator;
+import org.eclipse.linuxtools.internal.ctf.core.trace.StreamInputReaderTimestampComparator;
+
/**
- * Reads the events of a trace.
+ * A CTF trace reader. Reads the events of a trace.
+ *
+ * @version 1.0
+ * @author Matthew Khouzam
+ * @author Alexandre Montplaisir
*/
-
public class CTFTraceReader {
// ------------------------------------------------------------------------
/**
* Vector of all the trace file readers.
*/
- private final Vector<StreamInputReader> streamInputReaders = new Vector<StreamInputReader>();
+ private final List<StreamInputReader> streamInputReaders = new ArrayList<StreamInputReader>();
/**
* Priority queue to order the trace file readers by timestamp.
*/
- protected PriorityQueue<StreamInputReader> prio;
+ private PriorityQueue<StreamInputReader> prio;
/**
* Array to count the number of event per trace file.
*/
- private int[] eventCountPerTraceFile;
+ private long[] eventCountPerTraceFile;
/**
* Timestamp of the first event in the trace
*
* @param trace
* The trace to read from.
- * @throws CTFReaderException
*/
public CTFTraceReader(CTFTrace trace) {
this.trace = trace;
+ streamInputReaders.clear();
/**
* Create the trace file readers.
populateStreamInputReaderHeap();
/**
- * Get the start Time of this trace
+ * Get the start Time of this trace bear in mind that the trace could be
+ * empty.
*/
- this.startTime = prio.peek().getCurrentEvent().timestamp;
- this.endTime = this.startTime;
+ this.startTime = 0;
+ if (hasMoreEvents()) {
+ this.startTime = prio.peek().getCurrentEvent().getTimestamp();
+ this.setEndTime(this.startTime);
+ }
}
/**
* Copy constructor
+ *
+ * @return The new CTFTraceReader
*/
public CTFTraceReader copyFrom() {
CTFTraceReader newReader = null;
newReader = new CTFTraceReader(this.trace);
newReader.startTime = this.startTime;
- newReader.endTime = this.endTime;
+ newReader.setEndTime(this.endTime);
return newReader;
}
+ /**
+ * Dispose the CTFTraceReader
+ * @since 2.0
+ */
+ public void dispose() {
+ for (StreamInputReader reader : streamInputReaders) {
+ if (reader != null) {
+ reader.dispose();
+ }
+ }
+ streamInputReaders.clear();
+ }
+
// ------------------------------------------------------------------------
// Getters/Setters/Predicates
// ------------------------------------------------------------------------
return this.startTime;
}
+ /**
+ * Set the trace's end time
+ *
+ * @param endTime
+ * The end time to use
+ */
+ protected final void setEndTime(long endTime) {
+ this.endTime = endTime;
+ }
+
+ /**
+ * Get the priority queue of this trace reader.
+ *
+ * @return The priority queue of input readers
+ * @since 2.0
+ */
+ protected PriorityQueue<StreamInputReader> getPrio() {
+ return prio;
+ }
+
+
// ------------------------------------------------------------------------
// Operations
// ------------------------------------------------------------------------
/*
* Create the array to count the number of event per trace file.
*/
- this.eventCountPerTraceFile = new int[this.streamInputReaders.size()];
+ this.eventCountPerTraceFile = new long[this.streamInputReaders.size()];
}
/**
* lower next event timestamp.
*/
private void populateStreamInputReaderHeap() {
+ if (this.streamInputReaders.isEmpty()) {
+ this.prio = new PriorityQueue<StreamInputReader>();
+ return;
+ }
+
/*
* Create the priority queue with a size twice as bigger as the number
* of reader in order to avoid constant resizing.
* Add each trace file reader in the priority queue, if we are able
* to read an event from it.
*/
+ reader.setParent(this);
if (reader.readNextEvent()) {
this.prio.add(reader);
* of the trace.
*/
public EventDefinition getCurrentEventDef() {
- StreamInputReader top = this.prio.peek();
+ StreamInputReader top = getTopStream();
return (top != null) ? top.getCurrentEvent() : null;
}
if (top == null) {
return false;
}
-
/*
* Read the next event of this reader.
*/
* Add it back in the queue.
*/
this.prio.add(top);
- final long topEnd = top.getCurrentEvent().timestamp;
- this.endTime = Math.max(topEnd, this.endTime);
+ final long topEnd = this.trace.timestampCyclesToNanos(top.getCurrentEvent().getTimestamp());
+ this.setEndTime(Math.max(topEnd, this.getEndTime()));
this.eventCountPerTraceFile[top.getName()]++;
- }
+ if (top.getCurrentEvent() != null) {
+ this.endTime = Math.max(top.getCurrentEvent().getTimestamp(),
+ this.endTime);
+ }
+ }
/*
* If there is no reader in the queue, it means the trace reader reached
* the end of the trace.
/**
* Go to the last event in the trace.
- *
- * @throws CTFReaderException
*/
- public void goToLastEvent() throws CTFReaderException {
-
- this.seek(0);
- for (StreamInputReader streamInputReader : this.streamInputReaders) {
- /*
- * Seek the trace reader.
- */
- streamInputReader.goToLastEvent();
- }
- int count = prio.size();
- for (int i = 0; i < (count); i++) {
- advance();
+ public void goToLastEvent() {
+ seek(this.getEndTime());
+ while (this.prio.size() > 1) {
+ this.advance();
}
}
/**
- * Seeks to a given timestamp It will go to the event just after the
- * timestamp or the timestamp itself. if a if a trace is 10 20 30 40 and
- * you're looking for 19, it'll give you 20, it you want 20, you'll get 20,
- * if you want 21, you'll get 30. You want -inf, you'll get the first
- * element, you want +inf, you'll get the end of the file with no events.
+ * Seeks to a given timestamp. It will seek to the nearest event greater or
+ * equal to timestamp. If a trace is [10 20 30 40] and you are looking for
+ * 19, it will give you 20. If you want 20, you will get 20, if you want 21,
+ * you will get 30. The value -inf will seek to the first element and the
+ * value +inf will seek to the end of the file (past the last event).
*
* @param timestamp
* the timestamp to seek to
- * @return true if the trace has more events following the timestamp
+ * @return true if there are events above or equal the seek timestamp,
+ * false if seek at the end of the trace (no valid event).
*/
public boolean seek(long timestamp) {
/*
* Remove all the trace readers from the priority queue
*/
this.prio.clear();
-
for (StreamInputReader streamInputReader : this.streamInputReaders) {
/*
* Seek the trace reader.
this.prio.add(streamInputReader);
}
}
-
return hasMoreEvents();
}
+ /**
+ * Gets the stream with the oldest event
+ *
+ * @return the stream with the oldest event
+ */
+ public StreamInputReader getTopStream() {
+ return this.prio.peek();
+ }
+
/**
* Does the trace have more events?
*
* @return true if yes.
*/
- public boolean hasMoreEvents() {
+ public final boolean hasMoreEvents() {
return this.prio.size() > 0;
}
return;
}
- for (int i : this.eventCountPerTraceFile) {
+ for (long i : this.eventCountPerTraceFile) {
numEvents += i;
}
for (int j = 0; j < this.eventCountPerTraceFile.length; j++) {
StreamInputReader se = this.streamInputReaders.get(j);
- int len = (width * this.eventCountPerTraceFile[se.getName()])
+ long len = (width * this.eventCountPerTraceFile[se.getName()])
/ numEvents;
- StringBuilder sb = new StringBuilder(
- se.getStreamInput().getFilename() + "\t["); //$NON-NLS-1$
+ StringBuilder sb = new StringBuilder(se.getFilename());
+ sb.append("\t["); //$NON-NLS-1$
for (int i = 0; i < len; i++) {
sb.append('+');
}
- for (int i = len; i < width; i++) {
+ for (long i = len; i < width; i++) {
sb.append(' ');
}
sb.append("]\t" + this.eventCountPerTraceFile[se.getName()] + " Events"); //$NON-NLS-1$//$NON-NLS-2$
- Activator.getDefault().log(sb.toString());
+ Activator.log(sb.toString());
}
}
+ /**
+ * Gets the last event timestamp that was read. This is NOT necessarily the
+ * last event in a trace, just the last one read so far.
+ *
+ * @return the last event
+ */
public long getEndTime() {
return this.endTime;
}
public int hashCode() {
final int prime = 31;
int result = 1;
- result = (prime * result) + (int) (endTime ^ (endTime >>> 32));
result = (prime * result) + (int) (startTime ^ (startTime >>> 32));
- result = (prime * result)
- + ((streamInputReaders == null) ? 0
- : streamInputReaders.hashCode());
+ result = (prime * result) + streamInputReaders.hashCode();
result = (prime * result) + ((trace == null) ? 0 : trace.hashCode());
return result;
}
if (obj == null) {
return false;
}
- if (getClass() != obj.getClass()) {
+ if (!(obj instanceof CTFTraceReader)) {
return false;
}
CTFTraceReader other = (CTFTraceReader) obj;
- if (endTime != other.endTime) {
- return false;
- }
- if (startTime != other.startTime) {
- return false;
- }
- if (streamInputReaders == null) {
- if (other.streamInputReaders != null) {
- return false;
- }
- } else if (!streamInputReaders.equals(other.streamInputReaders)) {
+ if (!streamInputReaders.equals(other.streamInputReaders)) {
return false;
}
if (trace == null) {
return true;
}
- /*
- * (non-Javadoc)
- *
- * @see java.lang.Object#toString()
- */
@Override
public String toString() {
/* Only for debugging, shouldn't be externalized */
return "CTFTraceReader [trace=" + trace + ']'; //$NON-NLS-1$
}
+ /**
+ * Gets the parent trace
+ *
+ * @return the parent trace
+ */
public CTFTrace getTrace() {
return trace;
}
projects / deliverable / tracecompass.git / blobdiff