void lockParticipant(final Participant p, final CoordinationImpl c) {
synchronized (participants) {
// wait for participant to be released
long cutOff = System.currentTimeMillis() + participationTimeOut;
long waitTime =
(participationTimeOut > 500) ? participationTimeOut / 500 : participationTimeOut;
CoordinationImpl current = participants.get(p);
while (current != null && current != c) {
if (current.getThread() == c.getThread()) {
throw new CoordinationException(
"Participant "
+ p
+ " already participating in Coordination "
+ current.getId()
+ "/"
+ current.getName()
+ " in this thread",
c,
CoordinationException.DEADLOCK_DETECTED);
}
try {
participants.wait(waitTime);
} catch (InterruptedException ie) {
throw new CoordinationException(
"Interrupted waiting to add Participant "
+ p
+ " currently participating in Coordination "
+ current.getId()
+ "/"
+ current.getName()
+ " in this thread",
c,
CoordinationException.LOCK_INTERRUPTED);
}
// timeout waiting for participation
if (System.currentTimeMillis() > cutOff) {
throw new CoordinationException(
"Timed out waiting to join coordinaton", c, CoordinationException.UNKNOWN);
}
// check again
current = participants.get(p);
}
// lock participant into coordination
participants.put(p, c);
}
}
