package com.linkedin.helix;
import java.util.Date;
import java.util.List;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.linkedin.helix.ConfigScope.ConfigScopeProperty;
import com.linkedin.helix.PropertyKey.Builder;
import com.linkedin.helix.model.InstanceConfig;
public class TestListenerCallback extends ZkUnitTestBase
{
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, ZK_ADDR, 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, ZK_ADDR);
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()));
}
}