package org.apache.helix;
/*
* 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 java.util.List;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
import org.apache.helix.model.InstanceConfig;
import org.apache.helix.testutil.ZkTestBase;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestListenerCallback extends ZkTestBase {
class TestListener implements InstanceConfigChangeListener, ScopedConfigChangeListener {
boolean _instanceConfigChanged = false;
boolean _configChanged = false;
@Override
public void onConfigChange(List<HelixProperty> configs, NotificationContext context) {
_configChanged = true;
System.out.println("onConfigChange invoked: " + configs.size() + ", " + configs);
}
@Override
public void onInstanceConfigChange(List<InstanceConfig> instanceConfigs,
NotificationContext context) {
_instanceConfigChanged = true;
System.out.println("onInstanceConfigChange invoked: " + instanceConfigs);
}
}
@Test
public void testBasic() 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
32, // partitions per resource
n, // number of nodes
2, // replicas
"MasterSlave", true); // do rebalance
HelixManager manager =
HelixManagerFactory.getZKHelixManager(clusterName, "localhost", InstanceType.SPECTATOR,
_zkaddr);
manager.connect();
TestListener listener = new TestListener();
listener._instanceConfigChanged = false;
manager.addInstanceConfigChangeListener(listener);
Assert.assertTrue(listener._instanceConfigChanged,
"Should get initial instanceConfig callback invoked");
listener._configChanged = false;
manager.addConfigChangeListener(listener, ConfigScopeProperty.CLUSTER);
Assert.assertTrue(listener._configChanged, "Should get initial clusterConfig callback invoked");
listener._configChanged = false;
manager.addConfigChangeListener(listener, ConfigScopeProperty.RESOURCE);
Assert
.assertTrue(listener._configChanged, "Should get initial resourceConfig callback invoked");
// test change content
HelixDataAccessor accessor = manager.getHelixDataAccessor();
Builder keyBuilder = accessor.keyBuilder();
String instanceName = "localhost_12918";
HelixProperty value = accessor.getProperty(keyBuilder.instanceConfig(instanceName));
value._record.setSimpleField("" + System.currentTimeMillis(), "newValue");
listener._instanceConfigChanged = false;
accessor.setProperty(keyBuilder.instanceConfig(instanceName), value);
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._instanceConfigChanged,
"Should get instanceConfig callback invoked since we change instanceConfig");
value = accessor.getProperty(keyBuilder.clusterConfig());
value._record.setSimpleField("" + System.currentTimeMillis(), "newValue");
listener._configChanged = false;
accessor.setProperty(keyBuilder.clusterConfig(), value);
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._configChanged,
"Should get clusterConfig callback invoked since we change clusterConfig");
String resourceName = "TestDB_0";
value = new HelixProperty(resourceName);
value._record.setSimpleField("" + System.currentTimeMillis(), "newValue");
listener._configChanged = false;
accessor.setProperty(keyBuilder.resourceConfig(resourceName), value);
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._configChanged,
"Should get resourceConfig callback invoked since we add resourceConfig");
value._record.setSimpleField("" + System.currentTimeMillis(), "newValue");
listener._configChanged = false;
accessor.setProperty(keyBuilder.resourceConfig(resourceName), value);
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._configChanged,
"Should get resourceConfig callback invoked since we change resourceConfig");
listener._configChanged = false;
accessor.removeProperty(keyBuilder.resourceConfig(resourceName));
Thread.sleep(1000); // wait zk callback
Assert.assertTrue(listener._configChanged,
"Should get resourceConfig callback invoked since we delete resourceConfig");
System.out.println("END " + clusterName + " at " + new Date(System.currentTimeMillis()));
}
}