package com.linkedin.helix.integration;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.testng.Assert;
import org.testng.annotations.Test;
import com.linkedin.helix.ExternalViewChangeListener;
import com.linkedin.helix.HelixManager;
import com.linkedin.helix.HelixManagerFactory;
import com.linkedin.helix.InstanceType;
import com.linkedin.helix.NotificationContext;
import com.linkedin.helix.model.ExternalView;
import com.linkedin.helix.tools.ClusterStateVerifier;
public class TestBasicSpectator extends ZkStandAloneCMTestBase implements ExternalViewChangeListener
{
Map<String, Integer> _externalViewChanges = new HashMap<String, Integer>();
@Test
public void TestSpectator() throws Exception
{
HelixManager relayHelixManager = HelixManagerFactory.getZKHelixManager(CLUSTER_NAME,
null,
InstanceType.SPECTATOR,
ZK_ADDR);
relayHelixManager.connect();
relayHelixManager.addExternalViewChangeListener(this);
_setupTool.addResourceToCluster(CLUSTER_NAME, "NextDB", 64, STATE_MODEL);
_setupTool.rebalanceStorageCluster(CLUSTER_NAME, "NextDB", 3);
boolean result = ClusterStateVerifier.verifyByPolling(
new ClusterStateVerifier.BestPossAndExtViewZkVerifier(ZK_ADDR, CLUSTER_NAME));
Assert.assertTrue(result);
Assert.assertTrue(_externalViewChanges.containsKey("NextDB"));
Assert.assertTrue(_externalViewChanges.containsKey(TEST_DB));
}
@Override
public void onExternalViewChange(List<ExternalView> externalViewList,
NotificationContext changeContext)
{
for(ExternalView view : externalViewList)
{
if(!_externalViewChanges.containsKey(view.getResourceName()))
{
_externalViewChanges.put(view.getResourceName(), 1);
}
else
{
_externalViewChanges.put(view.getResourceName(), _externalViewChanges.get(view.getResourceName())+ 1);
}
}
}
}