package org.apache.helix.agent;
/*
* 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
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import java.io.File;
import java.util.Date;
import org.apache.helix.ConfigAccessor;
import org.apache.helix.ScriptTestHelper;
import org.apache.helix.TestHelper;
import org.apache.helix.ZkUnitTestBase;
import org.apache.helix.manager.zk.ZNRecordSerializer;
import org.apache.helix.manager.zk.ZkClient;
import org.apache.helix.mock.controller.ClusterController;
import org.apache.helix.model.HelixConfigScope;
import org.apache.helix.model.HelixConfigScope.ConfigScopeProperty;
import org.apache.helix.model.builder.HelixConfigScopeBuilder;
import org.apache.helix.tools.ClusterSetup;
import org.apache.helix.tools.ClusterStateVerifier;
import org.apache.helix.tools.ClusterStateVerifier.BestPossAndExtViewZkVerifier;
import org.testng.Assert;
import org.testng.annotations.Test;
public class TestHelixAgent extends ZkUnitTestBase {
// disable this test
// @Test
public void test() throws Exception {
String className = TestHelper.getTestClassName();
String methodName = TestHelper.getTestMethodName();
final String clusterName = className + "_" + methodName;
final int n = 1;
final String zkAddr = ZK_ADDR;
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
1, // partitions per resource
n, // number of nodes
1, // replicas
"MasterSlave",
true); // do rebalance
// set cluster config
ZkClient client = new ZkClient(zkAddr,
ZkClient.DEFAULT_SESSION_TIMEOUT,
ZkClient.DEFAULT_CONNECTION_TIMEOUT,
new ZNRecordSerializer());
HelixConfigScope scope = new HelixConfigScopeBuilder(ConfigScopeProperty.CLUSTER)
.forCluster(clusterName)
.build();
ConfigAccessor configAccessor = new ConfigAccessor(client);
// run foo_test.py during S->M
String workingDir = ScriptTestHelper.getPrefix() + ScriptTestHelper.INTEGRATION_SCRIPT_DIR;
String pidFile = ScriptTestHelper.getPrefix() + ScriptTestHelper.INTEGRATION_LOG_DIR + "/default/foo_{PARTITION_NAME}_pid.txt";
// System.out.println("workingDir: " + workingDir);
// the pid file path for the first partition
// delete it if exists
String pidFileFirstPartition = ScriptTestHelper.getPrefix() + ScriptTestHelper.INTEGRATION_LOG_DIR + "/default/foo_TestDB0_0_pid.txt";
File file = new File(pidFileFirstPartition);
if (file.exists()) {
file.delete();
}
CommandConfig.Builder builder = new CommandConfig.Builder();
CommandConfig cmdConfig = builder.setTransition("SLAVE", "MASTER")
.setCommand("dds_driver.py -c foo_test -o start")
.setCommandWorkingDir(workingDir)
.setCommandTimeout("0")
.setPidFile(pidFile)
.build();
configAccessor.set(scope, cmdConfig.toKeyValueMap());
// nop for O->S, M->S, and S->O
builder = new CommandConfig.Builder();
cmdConfig = builder.setTransition("OFFLINE", "SLAVE")
.setCommand(CommandAttribute.NOP.getName())
.build();
configAccessor.set(scope, cmdConfig.toKeyValueMap());
builder = new CommandConfig.Builder();
cmdConfig = builder.setTransition("MASTER", "SLAVE")
.setCommand(CommandAttribute.NOP.getName())
.build();
configAccessor.set(scope, cmdConfig.toKeyValueMap());
builder = new CommandConfig.Builder();
cmdConfig = builder.setTransition("SLAVE", "OFFLINE")
.setCommand(CommandAttribute.NOP.getName())
.build();
configAccessor.set(scope, cmdConfig.toKeyValueMap());
builder = new CommandConfig.Builder();
cmdConfig = builder.setTransition("OFFLINE", "DROPPED")
.setCommand(CommandAttribute.NOP.getName())
.build();
configAccessor.set(scope, cmdConfig.toKeyValueMap());
// start controller
ClusterController controller =
new ClusterController(clusterName, "controller_0", zkAddr);
controller.syncStart();
// start helix-agent
for (int i = 0; i < n; i++) {
final String instanceName = "localhost_" + (12918 + i);
Thread agentThread = new Thread() {
@Override
public void run() {
try {
HelixAgentMain.main(new String[]{"--zkSvr", zkAddr, "--cluster", clusterName,
"--instanceName", instanceName, "--stateModel", "MasterSlave"});
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
};
agentThread.start();
// wait participant thread to start
Thread.sleep(100);
}
boolean result =
ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
clusterName));
Assert.assertTrue(result);
// read the pid file should get current process id
String readPid = SystemUtil.getPidFromFile(new File(pidFileFirstPartition));
Assert.assertNotNull(readPid, "readPid is the pid for foo_test.py. should NOT be null");
// String name = ManagementFactory.getRuntimeMXBean().getName();
// String currentPid = name.substring(0,name.indexOf("@"));
// System.out.println("read-pid: " + readPid + ", current-pid: " + currentPid);
// drop resource will trigger M->S and S->O transitions
ClusterSetup.processCommandLineArgs(new String[]{"--zkSvr", ZK_ADDR, "--dropResource", clusterName, "TestDB0"});
result =
ClusterStateVerifier.verifyByZkCallback(new BestPossAndExtViewZkVerifier(ZK_ADDR,
clusterName));
Assert.assertTrue(result);
System.out.println("END " + clusterName + " at "
+ new Date(System.currentTimeMillis()));
}
}