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From neykov <...@git.apache.org>
Subject [GitHub] brooklyn-server pull request #493: Make the Repeater class use a threads to ...
Date Thu, 26 Jan 2017 16:45:47 GMT
Github user neykov commented on a diff in the pull request:

    https://github.com/apache/brooklyn-server/pull/493#discussion_r98035839
  
    --- Diff: utils/common/src/main/java/org/apache/brooklyn/util/repeat/Repeater.java ---
    @@ -301,89 +332,96 @@ public Repeater limitTimeTo(Duration duration) {
         public boolean run() {
             return runKeepingError().getWithoutError();
         }
    -    
    +
         public void runRequiringTrue() {
             Stopwatch timer = Stopwatch.createStarted();
             ReferenceWithError<Boolean> result = runKeepingError();
             result.checkNoError();
    -        if (!result.get()) 
    +        if (!result.get()) {
                 throw new IllegalStateException(description+" unsatisfied after "+Duration.of(timer));
    +        }
         }
    -    
    +
         public ReferenceWithError<Boolean> runKeepingError() {
    -        Preconditions.checkState(body != null, "repeat() method has not been called to
set the body");
    -        Preconditions.checkState(exitCondition != null, "until() method has not been
called to set the exit condition");
    -        Preconditions.checkState(delayOnIteration != null, "every() method (or other
delaySupplier() / backoff() method) has not been called to set the loop delay");
    +        Preconditions.checkNotNull(exitCondition, "until() method has not been called
to set the exit condition");
    +        Preconditions.checkNotNull(delayOnIteration, "every() method (or other delaySupplier()
/ backoff() method) has not been called to set the loop delay");
     
             boolean hasLoggedTransientException = false;
             Throwable lastError = null;
             int iterations = 0;
             CountdownTimer timer = timeLimit!=null ? CountdownTimer.newInstanceStarted(timeLimit)
: CountdownTimer.newInstancePaused(Duration.PRACTICALLY_FOREVER);
     
    -        while (true) {
    -            Duration delayThisIteration = delayOnIteration.apply(iterations);
    -            iterations++;
    -
    -            try {
    -                body.call();
    -            } catch (Throwable e) {
    -                log.warn(description, e);
    -                if (rethrowImmediatelyCondition.apply(e)) throw Exceptions.propagate(e);
    -            }
    -
    -            boolean done = false;
    -            try {
    -                lastError = null;
    -                done = exitCondition.call();
    -                hasLoggedTransientException = false;
    -            } catch (Throwable e) {
    -                if (hasLoggedTransientException) {
    -                    if (log.isDebugEnabled()) log.debug(description + " (repeated failure;
excluding stacktrace): " + e);
    -                } else {
    -                    if (log.isDebugEnabled()) log.debug(description, e);
    -                    hasLoggedTransientException = true;
    +        try {
    +            while (true) {
    +                Duration delayThisIteration = delayOnIteration.apply(iterations);
    +                iterations++;
    +
    +                Future<?> call = executor.submit(body);
    +                try {
    +                    call.get(delayThisIteration.toMilliseconds(), TimeUnit.MILLISECONDS);
    --- End diff --
    
    I think a separate time out is needed here, especially when used with `backoff`, but happy
to go with this.


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