package org.apache.helix.integration;
/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
import java.util.Date;
import org.apache.helix.PropertyKey;
import org.apache.helix.TestHelper;
import org.apache.helix.ZkTestHelper;
import org.apache.helix.manager.zk.MockParticipant;
import org.apache.helix.manager.zk.MockController;
import org.apache.helix.manager.zk.ZKHelixAdmin;
import org.apache.helix.manager.zk.ZKHelixDataAccessor;
import org.apache.helix.model.ExternalView;
import org.apache.helix.model.LiveInstance;
import org.apache.helix.testutil.ZkTestBase;
import org.apache.helix.tools.ClusterStateVerifier;
import org.testng.Assert;
import org.testng.annotations.Test;
/**
* Test clean external-view - if current-state is remove externally, controller should remove the
* orphan external-view
*/
public class TestCleanupExternalView extends ZkTestBase {
@Test
public void test() throws Exception {
// Logger.getRootLogger().setLevel(Level.INFO);
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
String clusterName = className + "_" + methodName;
int n = 2;
System.out.println("START " + clusterName + " at " + new Date(System.currentTimeMillis()));
TestHelper.setupCluster(clusterName, _zkaddr, 12918, // participant port
"localhost", // participant name prefix
"TestDB", // resource name prefix
1, // resources
2, // partitions per resource
n, // number of nodes
2, // replicas
"MasterSlave", true); // do rebalance
MockController controller =
new MockController(_zkaddr, clusterName, "controller_0");
controller.syncStart();
// start participants
MockParticipant[] participants = new MockParticipant[n];
for (int i = 0; i < n; i++) {
String instanceName = "localhost_" + (12918 + i);
participants[i] = new MockParticipant(_zkaddr, clusterName, instanceName);
participants[i].syncStart();
}
boolean result =
ClusterStateVerifier
.verifyByZkCallback(new ClusterStateVerifier.BestPossAndExtViewZkVerifier(_zkaddr,
clusterName));
Assert.assertTrue(result);
// disable controller
ZKHelixAdmin admin = new ZKHelixAdmin(_zkclient);
admin.enableCluster(clusterName, false);
// wait all pending zk-events being processed, otherwise remove current-state will cause
// controller send O->S message
ZkTestHelper.tryWaitZkEventsCleaned(controller.getZkClient());
// System.out.println("paused controller");
// drop resource
admin.dropResource(clusterName, "TestDB0");
// delete current-state manually, controller shall remove external-view when cluster is enabled
// again
ZKHelixDataAccessor accessor =
new ZKHelixDataAccessor(clusterName, _baseAccessor);
PropertyKey.Builder keyBuilder = accessor.keyBuilder();
// System.out.println("remove current-state");
LiveInstance liveInstance = accessor.getProperty(keyBuilder.liveInstance("localhost_12918"));
accessor.removeProperty(keyBuilder.currentState("localhost_12918", liveInstance
.getTypedSessionId().stringify(), "TestDB0"));
liveInstance = accessor.getProperty(keyBuilder.liveInstance("localhost_12919"));
accessor.removeProperty(keyBuilder.currentState("localhost_12919", liveInstance
.getTypedSessionId().stringify(), "TestDB0"));
// re-enable controller shall remove orphan external-view
// System.out.println("re-enabling controller");
admin.enableCluster(clusterName, true);
ExternalView externalView = null;
for (int i = 0; i < 10; i++) {
Thread.sleep(100);
externalView = accessor.getProperty(keyBuilder.externalView("TestDB0"));
// System.out.println("externalView: " + externalView);
if (externalView == null) {
break;
}
}
Assert.assertNull(externalView, "external-view for TestDB0 should be removed, but was: "
+ externalView);
// clean up
controller.syncStop();
for (int i = 0; i < n; i++) {
participants[i].syncStop();
}
System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}
}