TheNeuralBit commented on a change in pull request #13448:
URL: https://github.com/apache/beam/pull/13448#discussion_r533049574
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File path:
runners/java-fn-execution/src/test/java/org/apache/beam/runners/fnexecution/control/DefaultJobBundleFactoryTest.java
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@@ -459,27 +461,28 @@ public void loadBalancesBundles() throws Exception {
verify(envFactory, Mockito.times(2)).createEnvironment(eq(environment),
any());
long tms = System.currentTimeMillis();
- AtomicBoolean closed = new AtomicBoolean();
- // close to free up environment for another bundle
- TimerTask closeBundleTask =
- new TimerTask() {
- @Override
- public void run() {
- try {
- b2.close();
- closed.set(true);
- } catch (Exception e) {
- throw new RuntimeException(e);
- }
- }
- };
- new Timer().schedule(closeBundleTask, 100);
-
+ ScheduledExecutorService executor =
Executors.newSingleThreadScheduledExecutor();
+ ScheduledFuture<Optional<Exception>> closingFuture =
+ executor.schedule(
+ () -> {
+ try {
+ b2.close();
+ return Optional.empty();
+ } catch (Exception e) {
+ return Optional.of(e);
+ }
+ },
+ 100,
+ TimeUnit.MILLISECONDS);
+
+ // This call should block until closingFuture has finished closing b2
RemoteBundle b3 = sbf.getBundle(orf, srh,
BundleProgressHandler.ignored());
- // ensure we waited for close
+ // ensure the previous call waited for close
Assert.assertThat(System.currentTimeMillis() - tms,
greaterThanOrEqualTo(100L));
- Assert.assertThat(closed.get(), is(true));
+ // This assertion includes a small delay to give the forked thread a
chance to finish if it's
+ // been blocked
+ Assert.assertThat(closingFuture.get(1, TimeUnit.MILLISECONDS),
equalTo(Optional.empty()));
Review comment:
Yeah agree a small delay isn't ideal.. my concern with blocking
indefinitely is that it could return much later and the test would still pass
which wouldn't be correct. It _should_ be done.
Maybe I'm just splitting hairs, the prior assertion on System time is pretty
strong so we could just do without this one.
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