Examples with HelixCustomCodeRunner org.apache.helix.participant.HelixCustomCodeRunner used on opensource projects

Example 1 with HelixCustomCodeRunner

use of org.apache.helix.participant.HelixCustomCodeRunner in project helix by apache.

the class TestDisableCustomCodeRunner method test.

@Test
public void test() throws Exception {
    String className = TestHelper.getTestClassName();
    String methodName = TestHelper.getTestMethodName();
    String clusterName = className + "_" + methodName;
    System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
    // participant port
    TestHelper.setupCluster(// participant port
    clusterName, // participant port
    ZK_ADDR, // participant port
    12918, // participant name prefix
    "localhost", // resource name prefix
    "TestDB", // resources
    1, // partitions per resource
    PARTITION_NUM, // number of nodes
    N, // replicas
    2, "MasterSlave", // do rebalance
    true);
    ClusterControllerManager controller = new ClusterControllerManager(ZK_ADDR, clusterName, "controller");
    controller.syncStart();
    // start participants
    Map<String, MockParticipantManager> participants = new HashMap<String, MockParticipantManager>();
    Map<String, HelixCustomCodeRunner> customCodeRunners = new HashMap<String, HelixCustomCodeRunner>();
    Map<String, DummyCallback> callbacks = new HashMap<String, DummyCallback>();
    for (int i = 0; i < N; i++) {
        String instanceName = "localhost_" + (12918 + i);
        participants.put(instanceName, new MockParticipantManager(ZK_ADDR, clusterName, instanceName));
        customCodeRunners.put(instanceName, new HelixCustomCodeRunner(participants.get(instanceName), ZK_ADDR));
        callbacks.put(instanceName, new DummyCallback());
        customCodeRunners.get(instanceName).invoke(callbacks.get(instanceName)).on(ChangeType.LIVE_INSTANCE).usingLeaderStandbyModel("TestParticLeader").start();
        participants.get(instanceName).syncStart();
    }
    boolean result = ClusterStateVerifier.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // Make sure callback is registered
    BaseDataAccessor<ZNRecord> baseAccessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
    final HelixDataAccessor accessor = new ZKHelixDataAccessor(clusterName, baseAccessor);
    PropertyKey.Builder keyBuilder = accessor.keyBuilder();
    final String customCodeRunnerResource = customCodeRunners.get("localhost_12918").getResourceName();
    ExternalView extView = accessor.getProperty(keyBuilder.externalView(customCodeRunnerResource));
    Map<String, String> instanceStates = extView.getStateMap(customCodeRunnerResource + "_0");
    String leader = null;
    for (String instance : instanceStates.keySet()) {
        String state = instanceStates.get(instance);
        if ("LEADER".equals(state)) {
            leader = instance;
            break;
        }
    }
    Assert.assertNotNull(leader);
    for (String instance : callbacks.keySet()) {
        DummyCallback callback = callbacks.get(instance);
        if (instance.equals(leader)) {
            Assert.assertTrue(callback.isInitTypeInvoked());
        } else {
            Assert.assertFalse(callback.isInitTypeInvoked());
        }
        callback.reset();
    }
    // Disable custom-code runner resource
    HelixAdmin admin = new ZKHelixAdmin(_gZkClient);
    admin.enableResource(clusterName, customCodeRunnerResource, false);
    // Verify that states of custom-code runner are all OFFLINE
    result = TestHelper.verify(new TestHelper.Verifier() {

        @Override
        public boolean verify() throws Exception {
            PropertyKey.Builder keyBuilder = accessor.keyBuilder();
            ExternalView extView = accessor.getProperty(keyBuilder.externalView(customCodeRunnerResource));
            if (extView == null) {
                return false;
            }
            Set<String> partitionSet = extView.getPartitionSet();
            if (partitionSet == null || partitionSet.size() != PARTITION_NUM) {
                return false;
            }
            for (String partition : partitionSet) {
                Map<String, String> instanceStates = extView.getStateMap(partition);
                for (String state : instanceStates.values()) {
                    if (!"OFFLINE".equals(state)) {
                        return false;
                    }
                }
            }
            return true;
        }
    }, 10 * 1000);
    Assert.assertTrue(result);
    // Change live-instance should not invoke any custom-code runner
    LiveInstance fakeInstance = new LiveInstance("fakeInstance");
    fakeInstance.setSessionId("fakeSessionId");
    fakeInstance.setHelixVersion("0.6");
    accessor.setProperty(keyBuilder.liveInstance("fakeInstance"), fakeInstance);
    Thread.sleep(1000);
    for (Map.Entry<String, DummyCallback> e : callbacks.entrySet()) {
        String instance = e.getKey();
        DummyCallback callback = e.getValue();
        Assert.assertFalse(callback.isInitTypeInvoked());
        Assert.assertFalse(callback.isCallbackTypeInvoked());
        // Ensure that we were told that a leader stopped being the leader
        if (instance.equals(leader)) {
            Assert.assertTrue(callback.isFinalizeTypeInvoked());
        }
    }
    // Remove fake instance
    accessor.removeProperty(keyBuilder.liveInstance("fakeInstance"));
    // Re-enable custom-code runner
    admin.enableResource(clusterName, customCodeRunnerResource, true);
    result = ClusterStateVerifier.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR, clusterName));
    Assert.assertTrue(result);
    // Verify that custom-invoke is invoked again
    extView = accessor.getProperty(keyBuilder.externalView(customCodeRunnerResource));
    instanceStates = extView.getStateMap(customCodeRunnerResource + "_0");
    leader = null;
    for (String instance : instanceStates.keySet()) {
        String state = instanceStates.get(instance);
        if ("LEADER".equals(state)) {
            leader = instance;
            break;
        }
    }
    Assert.assertNotNull(leader);
    for (String instance : callbacks.keySet()) {
        DummyCallback callback = callbacks.get(instance);
        if (instance.equals(leader)) {
            Assert.assertTrue(callback.isInitTypeInvoked());
        } else {
            Assert.assertFalse(callback.isInitTypeInvoked());
        }
        callback.reset();
    }
    // Add a fake instance should invoke custom-code runner
    accessor.setProperty(keyBuilder.liveInstance("fakeInstance"), fakeInstance);
    Thread.sleep(1000);
    for (String instance : callbacks.keySet()) {
        DummyCallback callback = callbacks.get(instance);
        if (instance.equals(leader)) {
            Assert.assertTrue(callback.isCallbackTypeInvoked());
        } else {
            Assert.assertFalse(callback.isCallbackTypeInvoked());
        }
    }
    // Clean up
    controller.syncStop();
    for (MockParticipantManager participant : participants.values()) {
        participant.syncStop();
    }
    System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}

Example 2 with HelixCustomCodeRunner

use of org.apache.helix.participant.HelixCustomCodeRunner in project helix by apache.

the class TestHelixCustomCodeRunner method registerCustomCodeRunner.

private void registerCustomCodeRunner(HelixManager manager) {
    try {
        // so there will be a leadership transfer from localhost_12919 to 12918
        if (manager.getInstanceName().equals("localhost_12918")) {
            Thread.sleep(2000);
        }
        HelixCustomCodeRunner customCodeRunner = new HelixCustomCodeRunner(manager, ZK_ADDR);
        customCodeRunner.invoke(_callback).on(ChangeType.LIVE_INSTANCE).usingLeaderStandbyModel("TestParticLeader").start();
    } catch (Exception e) {
        LOG.error("Exception do pre-connect job", e);
    }
}