public DistStageAck executeOnSlave() {
if (!isServiceRunning()) {
log.info("Not running test on this slave as service is not running.");
return successfulResponse();
}
runningTest = (RunningTest) slaveState.get(RunningTest.nameFor(testName));
if (runningTest == null) {
runningTest = new RunningTest();
slaveState.put(RunningTest.nameFor(testName), runningTest);
slaveState.addServiceListener(runningTest);
} else if (runningTest.isTerminated()) {
return errorResponse("The test was terminated in previous iteration");
}
prepare();
runningTest.setMinThreadCreationDelay(minThreadCreationDelay);
runningTest.setMinWaitingThreads(rampUpMinWaitingThreads);
runningTest.setMaxThreads(maxThreads);
runningTest.setLogExceptions(logRequestExceptions, logTransactionExceptions);
runningTest.updateSelector(createSelector());
log.info("Starting test " + testName + " ramp-up");
int minThreads = Math.max(this.minThreads, rampUpMinWaitingThreads + 1);
while (runningTest.getUsedThreads() < minThreads) {
// one of the started threads may already create his sibling;
// fail silently if we attempt to reach the limit
runningTest.addStressor(true);
}
int lastThreads = 0;
long now = TimeService.currentTimeMillis();
long lastThreadsChange = now;
long startTime = now;
while (!runningTest.isTerminated()) {
int currentThreads = runningTest.getUsedThreads();
if (currentThreads != lastThreads) {
lastThreadsChange = now;
lastThreads = currentThreads;
}
if (now < startTime + rampUpMinDuration || now < lastThreadsChange + rampUpMinSteadyPeriod) {
if (rampUpMaxDuration > 0 && now > startTime + rampUpMaxDuration) {
break;
}
try {
Thread.sleep(1000);
} catch (InterruptedException e) {
log.warn("Interruptions should not happen.", e);
}
} else {
break;
}
now = TimeService.currentTimeMillis();
}
if (runningTest.isTerminated()) {
return errorResponse("Test was terminated during ramp-up");
} else if (rampUpMaxDuration > 0 && now >= startTime + rampUpMaxDuration) {
return errorResponse("Ramp-up has not stabilized within timeout");
} else if (runningTest.isReachedMax()) {
return errorResponse("Max thread count reached during ramp-up");
}
return successfulResponse();
}
private boolean check(List<Event> history) {
if (history.isEmpty()) return !changed;
long lastChange = history.get(history.size() - 1).getTime().getTime();
long current = TimeService.currentTimeMillis();
boolean hasChanged = lastChange + period > current;
return hasChanged == changed;
}