kezhuw commented on code in PR #501:
URL: https://github.com/apache/curator/pull/501#discussion_r1601593750
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curator-x-discovery/src/test/java/org/apache/curator/x/discovery/TestServiceCache.java:
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@@ -114,6 +117,81 @@ public void stateChanged(CuratorFramework client,
ConnectionState newState) {}
}
}
+ @Test
+ public void testInitialLoadUsingExecutor() throws Exception {
+ List<Closeable> closeables = Lists.newArrayList();
+ ExecutorService runSafeExec = new ThreadPoolExecutor(2, 2, 0,
TimeUnit.SECONDS, new ArrayBlockingQueue<>(5));
+ try {
+ CuratorFramework client = CuratorFrameworkFactory.builder()
+ .connectString(server.getConnectString())
+ .retryPolicy(new RetryOneTime(1))
+ .runSafeService(runSafeExec)
+ .build();
+ closeables.add(client);
+ client.start();
+
+ ServiceDiscovery<String> discovery =
ServiceDiscoveryBuilder.builder(String.class)
+ .basePath("/discovery")
+ .client(client)
+ .build();
+ closeables.add(discovery);
+ discovery.start();
+
+ ServiceInstance<String> instance1 =
ServiceInstance.<String>builder()
+ .payload("test")
+ .name("test")
+ .port(10064)
+ .build();
+ discovery.registerService(instance1);
+
+ ServiceCache<String> cache =
+ discovery.serviceCacheBuilder().name("test").build();
+ closeables.add(cache);
+
+ final CountDownLatch latch = new CountDownLatch(2);
+ ServiceCacheListener listener = new ServiceCacheListener() {
+ @Override
+ public void cacheChanged() {
+ latch.countDown();
+ }
+
+ @Override
+ public void stateChanged(CuratorFramework client,
ConnectionState newState) {}
+ };
+ cache.addListener(listener);
+ cache.start();
+ //assertEquals(1, cache.getInstances().size());
+
+ ServiceInstance<String> instance2 =
ServiceInstance.<String>builder()
+ .payload("test")
+ .name("test")
+ .port(10065)
+ .build();
+ ServiceInstance<String> instance3 =
ServiceInstance.<String>builder()
+ .payload("test")
+ .name("test")
+ .port(10066)
+ .build();
+ discovery.registerService(instance2);
+ discovery.registerService(instance3);
+ assertEquals(3, cache.getInstances().size());
Review Comment:
`ServiceCache::start` is a blocking operation, immediate `getInstances`
reflects initial cache after start. `ServiceCacheListener::cacheChanged` will
be called every time there is a change after start.
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