Github user alasdairhodge commented on a diff in the pull request:
https://github.com/apache/brooklyn-server/pull/583#discussion_r104893802
--- Diff: core/src/main/java/org/apache/brooklyn/core/entity/Entities.java
---
@@ -1139,6 +1141,29 @@ public static void warnOnIgnoringConfig(Entity
entity, ConfigKey<?> key) {
log.warn("Ignoring "+key+" set on "+entity+"
("+entity.getConfig(key)+")");
}
+ /** Waits until the passed entity satisfies the supplied predicate. */
+ public static void waitFor(Entity entity, Predicate<Entity> condition,
Duration timeout) {
+ try {
+ String description = "Waiting for " + condition + " on " +
entity;
+ Tasks.setBlockingDetails(description);
+
+ Repeater repeater = Repeater.create(description)
+ .until(isSatisfied(entity, condition))
+ .limitTimeTo(timeout)
+ .backoffTo(Duration.ONE_SECOND)
+ .rethrowException();
+
+ if (!repeater.run()) {
--- End diff --
Timeout is indicated by the `run` method returning `false`, rather than via
an exception. Since we set `rethrowException`, anything thrown by the passed
`Callable` will be rethrown on timeout.
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