protected long await(long nanoSeconds) throws InterruptedException {
long target_nano = System.nanoTime() + nanoSeconds;
if (!signaled.get()) {
// We release the lock at the same time as waiting on the
// condition
lock.acquired = false;
sendAwaitConditionRequest(lock.name, lock.owner);
boolean interrupted = false;
while (!signaled.get()) {
long wait_nano = target_nano - System.nanoTime();
// If we waited max time break out
if (wait_nano > 0) {
parker.set(Thread.currentThread());
LockSupport.parkNanos(this, wait_nano);
if (Thread.interrupted()) {
// If we were interrupted and haven't received a response yet then we try to
// clean up the lock request and throw the exception
if (!signaled.get()) {
sendDeleteAwaitConditionRequest(lock.name, lock.owner);
throw new InterruptedException();
}
// In the case that we were signaled and interrupted
// we want to return the signal but still interrupt
// our thread
interrupted = true;
}
} else {
break;
}
}
if (interrupted) Thread.currentThread().interrupt();
}
// We set as if this signal was no released. This way if the
// condition is reused again, but the client condition isn't lost
// we won't think we were signaled immediately
// If we weren't signaled then delete our request
if (!signaled.getAndSet(false)) {
sendDeleteAwaitConditionRequest(lock.name, lock.owner);
}
return target_nano - System.nanoTime();
}
@Override
public long awaitNanos(long nanosTimeout) throws InterruptedException {
long beforeLock;
InterruptedException ex = null;
try {
beforeLock = await(nanosTimeout) + System.nanoTime();
} catch (InterruptedException e) {
ex = e;
throw ex;
} finally {
lock.lock();
// If we are throwing an InterruptedException
// then clear the interrupt state as well.
if (ex != null) {
Thread.interrupted();
}
}
return beforeLock - System.nanoTime();
}
public Responses findMembers(
final List<Address> members, final boolean initial_discovery, boolean async) {
num_discovery_requests++;
int num_expected = members != null ? members.size() : 0;
int capacity = members != null ? members.size() : 16;
final Responses rsps =
new Responses(num_expected, initial_discovery && break_on_coord_rsp, capacity);
synchronized (ping_responses) {
ping_responses.put(System.nanoTime(), rsps);
}
if (async || async_discovery)
timer.execute(() -> findMembers(members, initial_discovery, rsps));
else findMembers(members, initial_discovery, rsps);
weedOutCompletedDiscoveryResponses();
return rsps;
}
/**
* Removes responses which are done or whose timeout has expired (in the latter case, an expired
* response is marked as done)
*/
@ManagedOperation(description = "Removes expired or completed responses")
public void weedOutCompletedDiscoveryResponses() {
synchronized (ping_responses) {
for (Iterator<Map.Entry<Long, Responses>> it = ping_responses.entrySet().iterator();
it.hasNext(); ) {
Map.Entry<Long, Responses> entry = it.next();
long timestamp = entry.getKey();
Responses rsps = entry.getValue();
if (rsps.isDone()
|| TimeUnit.MILLISECONDS.convert(System.nanoTime() - timestamp, TimeUnit.NANOSECONDS)
> discovery_rsp_expiry_time) {
it.remove();
rsps.done();
}
}
}
}
protected void addResponse(PingData rsp, boolean overwrite) {
synchronized (ping_responses) {
for (Iterator<Map.Entry<Long, Responses>> it = ping_responses.entrySet().iterator();
it.hasNext(); ) {
Map.Entry<Long, Responses> entry = it.next();
long timestamp = entry.getKey();
Responses rsps = entry.getValue();
rsps.addResponse(rsp, overwrite);
if (rsps.isDone()
|| TimeUnit.MILLISECONDS.convert(System.nanoTime() - timestamp, TimeUnit.NANOSECONDS)
> discovery_rsp_expiry_time) {
it.remove();
rsps.done();
}
}
}
}
