Buuhuu commented on a change in pull request #16: SLING-8946 non deterministic
resource observation
URL:
https://github.com/apache/sling-org-apache-sling-resourceresolver/pull/16#discussion_r363835997
##########
File path:
src/test/java/org/apache/sling/resourceresolver/impl/providers/ResourceProviderTrackerTest.java
##########
@@ -240,6 +248,62 @@ public void providerRemoved(String name, String pid,
boolean stateful, boolean u
assertThat(tracker.getResourceProviderStorage().getAllHandlers().size(),
equalTo(0));
}
+ /**
+ * This test verifies that shadowing of Resource observation is
deterministic when ResourceProviders get registered and unregistered,
+ * meaning it is independent of the order in which those events happen.
+ * <p>
+ * It does so by
+ * 1) registering a ResourceProvider A on a deeper path then root
(shadowing root)
+ * 2) registering a ResourceProvider B on root
+ * 3) unregistering the ResourceProvider A
+ * 4) and registering the ResoucreProvider A
+ * <p>
+ * This guarantees in both cases (A before B and B before A) the same
excludes are applied in the ObservationReporter.
+ *
+ * @throws InvalidSyntaxException
+ */
+ @Test
+ public void testDeterministicObservationShadowing() throws
InvalidSyntaxException {
+ final ResourceProviderTracker tracker = new ResourceProviderTracker();
+ final Map<String, List<String>> excludeSets = new HashMap<>();
+
+ tracker.activate(context.bundleContext(), eventAdmin, null);
+ tracker.setObservationReporterGenerator(new
SimpleObservationReporterGenerator(new DoNothingObservationReporter()) {
+ @Override
+ public ObservationReporter create(Path path, PathSet excludes) {
+ List<String> excludeSetsPerPath =
excludeSets.get(path.getPath());
+ if (excludeSetsPerPath == null) {
+ excludeSetsPerPath = new ArrayList<>(1);
+ excludeSets.put(path.getPath(), excludeSetsPerPath);
+ }
+
+ excludeSetsPerPath.clear();
+ for (Iterator<Path> excludesIt = excludes.iterator();
excludesIt.hasNext(); ) {
+ excludeSetsPerPath.add(excludesIt.next().getPath());
+ }
+
+ return super.create(path, excludes);
+ }
+ });
+
+ ResourceProvider rp = mock(ResourceProvider.class);
+ ResourceProviderInfo info;
+ // register on RP on /content/B2C, empty exclude set expected
Review comment:
I will remove those project specifics
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