public void executeOnCompletion(final IOAsyncTask completion) {
if (errorCode != -1) {
completion.onError(errorCode, errorMessage);
return;
}
boolean executeNow = false;
synchronized (this) {
if (tasks == null) {
tasks = new LinkedList<TaskHolder>();
minimalReplicated = replicationLineUp.intValue();
minimalStore = storeLineUp.intValue();
minimalPage = pageLineUp.intValue();
}
// On this case, we can just execute the context directly
if (replicationLineUp.intValue() == replicated
&& storeLineUp.intValue() == stored
&& pageLineUp.intValue() == paged) {
// We want to avoid the executor if everything is complete...
// However, we can't execute the context if there are executions pending
// We need to use the executor on this case
if (executorsPending.get() == 0) {
// No need to use an executor here or a context switch
// there are no actions pending.. hence we can just execute the task directly on the same
// thread
executeNow = true;
} else {
execute(completion);
}
} else {
tasks.add(new TaskHolder(completion));
}
}
if (executeNow) {
// Executing outside of any locks
completion.done();
}
}
/** @param task */
private void execute(final IOAsyncTask task) {
executorsPending.incrementAndGet();
try {
executor.execute(
new Runnable() {
public void run() {
try {
// If any IO is done inside the callback, it needs to be done on a new context
OperationContextImpl.clearContext();
task.done();
} finally {
executorsPending.decrementAndGet();
}
}
});
} catch (Throwable e) {
HornetQServerLogger.LOGGER.errorExecutingIOAsyncTask(e);
executorsPending.decrementAndGet();
task.onError(
HornetQExceptionType.INTERNAL_ERROR.getCode(),
"It wasn't possible to complete IO operation - " + e.getMessage());
}
}