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
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* KIND, either express or implied. See the License for the
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import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.helix.TestHelper;
import org.apache.helix.ZNRecord;
import org.apache.helix.PropertyKey.Builder;
import org.apache.helix.controller.HelixControllerMain;
import org.apache.helix.manager.zk.ZkBaseDataAccessor;
import org.apache.helix.mock.participant.MockParticipant;
import org.apache.helix.tools.ClusterStateVerifier;
import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier;
import org.apache.helix.tools.ClusterStateVerifier.MasterNbInExtViewVerifier;
import org.apache.zookeeper.data.Stat;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestExternalViewUpdates extends ZkIntegrationTestBase
{
@Test
public void testExternalViewUpdates() throws Exception
{
System.out.println("START testExternalViewUpdates at "
+ new Date(System.currentTimeMillis()));
String clusterName = getShortClassName();
MockParticipant[] participants = new MockParticipant[5];
int resourceNb = 10;
TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, // participant port
"localhost", // participant name prefix
"TestDB", // resource name prefix
resourceNb, // resources
1, // partitions per resource
5, // number of nodes
1, // replicas
"MasterSlave",
true); // do rebalance
TestHelper.startController(clusterName,
"controller_0",
ZK_ADDR,
HelixControllerMain.STANDALONE);
// start participants
for (int i = 0; i < 5; i++)
{
String instanceName = "localhost_" + (12918 + i);
participants[i] = new MockParticipant(clusterName, instanceName, ZK_ADDR, null);
participants[i].syncStart();
}
boolean result =
ClusterStateVerifier.verifyByZkCallback(new MasterNbInExtViewVerifier(ZK_ADDR,
clusterName));
Assert.assertTrue(result);
result =
ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
clusterName));
Assert.assertTrue(result);
// need to verify that each ExternalView's version number is 2
Builder keyBuilder = new Builder(clusterName);
ZkBaseDataAccessor<ZNRecord> accessor = new ZkBaseDataAccessor<ZNRecord>(_gZkClient);
String parentPath = keyBuilder.externalViews().getPath();
List<String> childNames = accessor.getChildNames(parentPath, 0);
List<String> paths = new ArrayList<String>();
for (String name : childNames)
{
paths.add(parentPath + "/" + name);
}
// Stat[] stats = accessor.getStats(paths);
for (String path : paths)
{
Stat stat = accessor.getStat(path, 0);
Assert.assertTrue(stat.getVersion() <= 2, "ExternalView should be updated at most 2 times");
}
// TODO: need stop controller and participants
System.out.println("END testExternalViewUpdates at "
+ new Date(System.currentTimeMillis()));
}
}