/**
* Returns true if lock succeeded, or no lock was needed. Returns false if locking was
* unsuccessfull.
*/
protected boolean lockJobIfNeeded() {
try {
if (job.isExclusive()) {
commandExecutor.execute(new LockExclusiveJobCmd(job));
}
} catch (Throwable lockException) {
if (log.isDebugEnabled()) {
log.debug(
"Exception during exclusive job acquisition. Retrying job.",
lockException.getMessage());
}
commandExecutor.execute(
new Command<Void>() {
public Void execute(CommandContext commandContext) {
commandContext.getJobEntityManager().retryAsyncJob(job);
return null;
}
});
return false;
}
return true;
}
protected void unlockJobIfNeeded() {
try {
if (job.isExclusive()) {
commandExecutor.execute(new UnlockExclusiveJobCmd(job));
}
} catch (ActivitiOptimisticLockingException optimisticLockingException) {
if (log.isDebugEnabled()) {
log.debug(
"Optimistic locking exception while unlocking the job. If you have multiple async executors running against the same database, "
+ "this exception means that this thread tried to acquire an exclusive job, which already was changed by another async executor thread."
+ "This is expected behavior in a clustered environment. "
+ "You can ignore this message if you indeed have multiple job executor acquisition threads running against the same database. "
+ "Exception message: {}",
optimisticLockingException.getMessage());
}
} catch (Throwable t) {
log.error("Error while unlocking exclusive job " + job.getId(), t);
}
}
