joerghoh commented on code in PR #20:
URL:
https://github.com/apache/sling-org-apache-sling-discovery-oak/pull/20#discussion_r3720259946
##########
src/main/java/org/apache/sling/discovery/oak/OakDiscoveryService.java:
##########
@@ -581,6 +604,80 @@ public void updateProperties() {
}
}
+ /**
+ * Returns {@code true} when this component or the framework is shutting
+ * down. Latches {@link #deactivating} on first observation so subsequent
+ * calls are a single volatile read. Package-private for unit testing.
+ */
+ boolean isShuttingDown() {
+ if (deactivating) {
+ return true;
+ }
+ final Bundle sb = systemBundle.get();
+ if (sb == null) {
+ return false;
+ }
+ try {
+ final int state = sb.getState();
+ if (state == Bundle.STOPPING
+ || state == Bundle.RESOLVED
+ || state == Bundle.INSTALLED
+ || state == Bundle.UNINSTALLED) {
+ deactivating = true;
+ logger.info("isShuttingDown: system bundle state {} observed -
"
+ + "OakDiscoveryService will skip further property
writes", state);
+ return true;
+ }
+ } catch (IllegalStateException e) {
+ deactivating = true;
+ logger.info("isShuttingDown: system bundle reference invalidated -
"
+ + "OakDiscoveryService will skip further property writes");
+ return true;
+ }
+ return false;
+ }
+
+ /**
+ * Test-only hook to install a system-bundle reference without going
+ * through {@link #cacheSystemBundle()}.
+ */
+ void setSystemBundleForTesting(final Bundle bundle) {
+ this.systemBundle.set(bundle);
+ }
+
+ private void cacheSystemBundle() {
+ cacheSystemBundle(FrameworkUtil.getBundle(OakDiscoveryService.class));
+ }
+
+ /**
+ * Package-private overload taking the caller-bundle explicitly, so unit
+ * tests can exercise the {@link BundleContext} failure branches without
+ * an OSGi framework.
+ */
+ void cacheSystemBundle(final Bundle ourBundle) {
+ if (ourBundle == null) {
+ logger.debug("cacheSystemBundle: no OSGi framework detected via
FrameworkUtil"
+ + " - shutdown detection degrades to deactivate() only");
+ return;
+ }
+ try {
+ final BundleContext ctx = ourBundle.getBundleContext();
Review Comment:
More a nitpick than an actual issue: There is a version of the
``activate()`` method which passes in the ComponentContext; from that you can
derive the BundleContext of this bundle directly.
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