use of org.apache.flink.kubernetes.kubeclient.resources.TestingLeaderCallbackHandler in project flink by apache.
the class KubernetesStateHandleStoreITCase method testMultipleKubernetesStateHandleStores.
@Test
public void testMultipleKubernetesStateHandleStores() throws Exception {
final Configuration configuration = kubernetesResource.getConfiguration();
final String leaderConfigMapName = LEADER_CONFIGMAP_NAME + System.currentTimeMillis();
final int leaderNum = 3;
final KubernetesLeaderElector[] leaderElectors = new KubernetesLeaderElector[leaderNum];
final FlinkKubeClient[] kubeClients = new FlinkKubeClient[leaderNum];
final TestingLeaderCallbackHandler[] leaderCallbackHandlers = new TestingLeaderCallbackHandler[leaderNum];
@SuppressWarnings("unchecked") final KubernetesStateHandleStore<TestingLongStateHandleHelper.LongStateHandle>[] stateHandleStores = new KubernetesStateHandleStore[leaderNum];
try {
for (int i = 0; i < leaderNum; i++) {
final String lockIdentity = UUID.randomUUID().toString();
kubeClients[i] = kubeClientFactory.fromConfiguration(configuration, "testing");
leaderCallbackHandlers[i] = new TestingLeaderCallbackHandler(lockIdentity);
leaderElectors[i] = kubeClients[i].createLeaderElector(new KubernetesLeaderElectionConfiguration(leaderConfigMapName, lockIdentity, configuration), leaderCallbackHandlers[i]);
stateHandleStores[i] = new KubernetesStateHandleStore<>(kubeClients[i], leaderConfigMapName, new TestingLongStateHandleHelper(), (ignore) -> true, lockIdentity);
leaderElectors[i].run();
}
// Wait for the leader
final String lockIdentity = TestingLeaderCallbackHandler.waitUntilNewLeaderAppears(TIMEOUT);
Long expectedState = null;
for (int i = 0; i < leaderNum; i++) {
// leader
if (leaderCallbackHandlers[i].getLockIdentity().equals(lockIdentity)) {
expectedState = (long) i;
}
stateHandleStores[i].addAndLock(KEY, new TestingLongStateHandleHelper.LongStateHandle(i));
}
// Only the leader could add successfully
assertThat(expectedState, is(notNullValue()));
assertThat(stateHandleStores[0].getAllAndLock().size(), is(1));
assertThat(stateHandleStores[0].getAllAndLock().get(0).f0.retrieveState().getValue(), is(expectedState));
assertThat(stateHandleStores[0].getAllAndLock().get(0).f1, is(KEY));
} finally {
TestingLongStateHandleHelper.clearGlobalState();
// Cleanup the resources
for (int i = 0; i < leaderNum; i++) {
if (leaderElectors[i] != null) {
leaderElectors[i].stop();
}
if (kubeClients[i] != null) {
kubeClients[i].close();
}
}
kubernetesResource.getFlinkKubeClient().deleteConfigMap(leaderConfigMapName).get();
}
}
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