private boolean sendMessages(
RingBuffer<byte[]> ringBuffer, long messagesPerSecond, int runtimeSeconds)
throws InterruptedException {
LOGGER.info("Rate: " + messagesPerSecond + ", for " + runtimeSeconds + "s");
long runtimeNanos = TimeUnit.SECONDS.toNanos(runtimeSeconds);
long t0 = System.nanoTime();
long delta = 0;
long sent = 0;
try {
do {
delta = System.nanoTime() - t0;
long shouldHaveSent = (messagesPerSecond * delta) / 1000000000;
for (; sent < shouldHaveSent; sent++) {
if (!send(ringBuffer)) {
return false;
}
}
LockSupport.parkNanos(1);
} while (delta <= runtimeNanos);
Thread.sleep(1000);
return ringBuffer.hasAvailableCapacity(ringBuffer.getBufferSize());
} finally {
while (!ringBuffer.hasAvailableCapacity(ringBuffer.getBufferSize())) {
Thread.sleep(1000);
}
}
}
private boolean send(RingBuffer<byte[]> ringBuffer) {
if (ringBuffer.hasAvailableCapacity(1)) {
long next = ringBuffer.next();
byte[] event = ringBuffer.get(next);
System.arraycopy(input, 0, event, 0, event.length);
ringBuffer.publish(next);
return true;
} else {
errorCount++;
return false;
}
}
/** Returns {@code true} if the specified disruptor still has unprocessed events. */
private static boolean hasBacklog(final Disruptor<?> theDisruptor) {
final RingBuffer<?> ringBuffer = theDisruptor.getRingBuffer();
return !ringBuffer.hasAvailableCapacity(ringBuffer.getBufferSize());
}