/** Resets all the event measurements. */
public static final void reset() {
if (!_isEnabled) {
return;
}
Enumeration eventNames = _events.keys();
while (eventNames.hasMoreElements()) {
String eventName = (String) eventNames.nextElement();
EventProfile eventProfile = (EventProfile) _events.get(eventName);
eventProfile.reset();
}
}
/**
* Prints the collected event measurements to the specified writer.
*
* @param writer Writer.
*/
public static final void print(PrintWriter writer) {
if (!_isEnabled) {
return;
}
Iterator profiles = _events.values().iterator();
while (profiles.hasNext()) {
EventProfile eventProfile = (EventProfile) profiles.next();
StringBuffer msg = new StringBuffer();
msg.append(eventProfile.getEvent() + ":\n");
msg.append(" count = " + eventProfile.getCount());
msg.append(" total = " + eventProfile.getTotalTime() + " (ms)");
msg.append(" average = " + eventProfile.getAverageTime() + " (ms)");
if (_isMemoryEnabled) {
msg.append("\n");
msg.append(" memory consumed = " + eventProfile.getTotalConsumedMemory() + " (bytes)");
msg.append(" memory collected = " + eventProfile.getTotalCollectedMemory() + " (bytes)");
}
msg.append("\n");
writer.println(msg.toString());
}
writer.flush();
}
/**
* Designates the ending of an event being measured.
*
* @param event Event description.
* @return Event duration (in milliseconds).
*/
public static final long end(String event) {
if (!_isEnabled) {
return 0;
}
long elapsedTime = 0;
long endTime = System.currentTimeMillis();
long endMemory = 0;
if (_isMemoryEnabled) {
endMemory = Runtime.getRuntime().freeMemory();
}
Stack threadStack = getThreadStack();
synchronized (threadStack) {
ThreadTrace nextTrace = (ThreadTrace) threadStack.peek();
if (!nextTrace.getEvent().equals(event)) {
System.err.println("Begin/end mismatch occurred at stack trace:");
printStackTrace(new PrintWriter(System.err, true));
System.err.println("Profiler has been disabled.");
enable(false);
return 0;
}
ThreadTrace trace = (ThreadTrace) threadStack.pop();
EventProfile eventProfile = getEventProfile(trace.getEvent());
elapsedTime = endTime - trace.getStartTime();
eventProfile.update(elapsedTime);
if (_isMemoryEnabled) {
long memory = trace.getStartMemory() - endMemory;
eventProfile.updateMemory(memory);
}
}
return elapsedTime;
}