Github user aledsage commented on a diff in the pull request:
https://github.com/apache/incubator-brooklyn/pull/83#discussion_r15518554
--- Diff:
software/webapp/src/main/java/brooklyn/entity/webapp/DynamicWebAppClusterImpl.java
---
@@ -127,4 +158,140 @@ protected boolean calculateServiceUp() {
}
return up;
}
+
+ // TODO this will probably be useful elsewhere ... but where to put it?
+ /** Waits for the given target to report service up, then runs the
given task
+ * (often an invocation on that entity), with the given name.
+ * If the target goes away, this task marks itself inessential
+ * before failing so as not to cause a parent task to fail. */
+ static <T> Task<T> whenServiceUp(final Entity target, final
TaskAdaptable<T> task, String name) {
+ return Tasks.<T>builder().name(name).dynamic(true).body(new
Callable<T>() {
+ @Override
+ public T call() {
+ try {
+ while (true) {
+ if (!Entities.isManaged(target)) {
+ Tasks.markInessential();
+ throw new IllegalStateException("Target
"+target+" is no longer managed");
+ }
+ if (target.getAttribute(Attributes.SERVICE_UP)) {
--- End diff --
Will cause NPE if SERVICE_UP attribute value is null. Do `if
(Boolean.TRUE.equals(target.getAttribute(Attributes.SERVICE_UP))) {`
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