package org.apache.helix.mock.participant;
/*
* 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 org.apache.commons.cli.CommandLine;
import org.apache.commons.cli.CommandLineParser;
import org.apache.commons.cli.GnuParser;
import org.apache.commons.cli.HelpFormatter;
import org.apache.commons.cli.Option;
import org.apache.commons.cli.OptionBuilder;
import org.apache.commons.cli.OptionGroup;
import org.apache.commons.cli.Options;
import org.apache.commons.cli.ParseException;
import org.apache.helix.HelixManager;
import org.apache.helix.HelixManagerFactory;
import org.apache.helix.InstanceType;
import org.apache.helix.NotificationContext;
import org.apache.helix.model.Message;
import org.apache.helix.participant.StateMachineEngine;
import org.apache.helix.participant.statemachine.StateModel;
import org.apache.helix.participant.statemachine.StateModelFactory;
import org.apache.log4j.Logger;
public class DummyProcess
{
private static final Logger logger = Logger.getLogger(DummyProcess.class);
public static final String zkServer = "zkSvr";
public static final String cluster = "cluster";
public static final String hostAddress = "host";
public static final String hostPort = "port";
public static final String relayCluster = "relayCluster";
public static final String help = "help";
public static final String transDelay = "transDelay";
public static final String helixManagerType = "helixManagerType";
// public static final String rootNamespace = "rootNamespace";
private final String _zkConnectString;
private final String _clusterName;
private final String _instanceName;
private DummyStateModelFactory stateModelFactory;
// private StateMachineEngine genericStateMachineHandler;
private int _transDelayInMs = 0;
private final String _clusterMangerType;
public DummyProcess(String zkConnectString,
String clusterName,
String instanceName,
String clusterMangerType,
int delay)
{
_zkConnectString = zkConnectString;
_clusterName = clusterName;
_instanceName = instanceName;
_clusterMangerType = clusterMangerType;
_transDelayInMs = delay > 0 ? delay : 0;
}
static void sleep(long transDelay)
{
try
{
if (transDelay > 0)
{
Thread.sleep(transDelay);
}
}
catch (InterruptedException e)
{
// TODO Auto-generated catch block
e.printStackTrace();
}
}
public HelixManager start() throws Exception
{
HelixManager manager = null;
// zk cluster manager
if (_clusterMangerType.equalsIgnoreCase("zk"))
{
manager = HelixManagerFactory.getZKHelixManager(_clusterName,
_instanceName,
InstanceType.PARTICIPANT,
_zkConnectString);
}
else
{
throw new IllegalArgumentException("Unsupported cluster manager type:" + _clusterMangerType);
}
stateModelFactory = new DummyStateModelFactory(_transDelayInMs);
DummyLeaderStandbyStateModelFactory stateModelFactory1 = new DummyLeaderStandbyStateModelFactory(_transDelayInMs);
DummyOnlineOfflineStateModelFactory stateModelFactory2 = new DummyOnlineOfflineStateModelFactory(_transDelayInMs);
// genericStateMachineHandler = new StateMachineEngine();
StateMachineEngine stateMach = manager.getStateMachineEngine();
stateMach.registerStateModelFactory("MasterSlave", stateModelFactory);
stateMach.registerStateModelFactory("LeaderStandby", stateModelFactory1);
stateMach.registerStateModelFactory("OnlineOffline", stateModelFactory2);
manager.connect();
// manager.getMessagingService().registerMessageHandlerFactory(MessageType.STATE_TRANSITION.toString(), genericStateMachineHandler);
return manager;
}
public static class DummyStateModelFactory extends StateModelFactory<DummyStateModel>
{
int _delay;
public DummyStateModelFactory(int delay)
{
_delay = delay;
}
@Override
public DummyStateModel createNewStateModel(String stateUnitKey)
{
DummyStateModel model = new DummyStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyLeaderStandbyStateModelFactory extends StateModelFactory<DummyLeaderStandbyStateModel>
{
int _delay;
public DummyLeaderStandbyStateModelFactory(int delay)
{
_delay = delay;
}
@Override
public DummyLeaderStandbyStateModel createNewStateModel(String stateUnitKey)
{
DummyLeaderStandbyStateModel model = new DummyLeaderStandbyStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyOnlineOfflineStateModelFactory extends StateModelFactory<DummyOnlineOfflineStateModel>
{
int _delay;
public DummyOnlineOfflineStateModelFactory(int delay)
{
_delay = delay;
}
@Override
public DummyOnlineOfflineStateModel createNewStateModel(String stateUnitKey)
{
DummyOnlineOfflineStateModel model = new DummyOnlineOfflineStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyStateModel extends StateModel
{
int _transDelay = 0;
public void setDelay(int delay)
{
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeSlaveFromOffline(Message message,
NotificationContext context)
{
String db = message.getPartitionName();
String instanceName = context.getManager().getInstanceName();
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeSlaveFromOffline(), instance:" + instanceName
+ ", db:" + db);
}
public void onBecomeSlaveFromMaster(Message message,
NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeSlaveFromMaster()");
}
public void onBecomeMasterFromSlave(Message message,
NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeMasterFromSlave()");
}
public void onBecomeOfflineFromSlave(Message message,
NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeOfflineFromSlave()");
}
public void onBecomeDroppedFromOffline(Message message, NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeDroppedFromOffline()");
}
}
public static class DummyOnlineOfflineStateModel extends StateModel
{
int _transDelay = 0;
public void setDelay(int delay)
{
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeOnlineFromOffline(Message message,
NotificationContext context)
{
String db = message.getPartitionName();
String instanceName = context.getManager().getInstanceName();
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeOnlineFromOffline(), instance:" + instanceName
+ ", db:" + db);
}
public void onBecomeOfflineFromOnline(Message message,
NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeOfflineFromOnline()");
}
public void onBecomeDroppedFromOffline(Message message, NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyStateModel.onBecomeDroppedFromOffline()");
}
}
public static class DummyLeaderStandbyStateModel extends StateModel
{
int _transDelay = 0;
public void setDelay(int delay)
{
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeLeaderFromStandby(Message message,
NotificationContext context)
{
String db = message.getPartitionName();
String instanceName = context.getManager().getInstanceName();
DummyProcess.sleep(_transDelay);
logger.info("DummyLeaderStandbyStateModel.onBecomeLeaderFromStandby(), instance:" + instanceName
+ ", db:" + db);
}
public void onBecomeStandbyFromLeader(Message message,
NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyLeaderStandbyStateModel.onBecomeStandbyFromLeader()");
}
public void onBecomeDroppedFromOffline(Message message, NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyLeaderStandbyStateModel.onBecomeDroppedFromOffline()");
}
public void onBecomeStandbyFromOffline(Message message, NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyLeaderStandbyStateModel.onBecomeStandbyFromOffline()");
}
public void onBecomeOfflineFromStandby(Message message, NotificationContext context)
{
DummyProcess.sleep(_transDelay);
logger.info("DummyLeaderStandbyStateModel.onBecomeOfflineFromStandby()");
}
}
// TODO hack OptionBuilder is not thread safe
@SuppressWarnings("static-access")
synchronized private static Options constructCommandLineOptions()
{
Option helpOption = OptionBuilder.withLongOpt(help)
.withDescription("Prints command-line options info").create();
Option clusterOption = OptionBuilder.withLongOpt(cluster)
.withDescription("Provide cluster name").create();
clusterOption.setArgs(1);
clusterOption.setRequired(true);
clusterOption.setArgName("Cluster name (Required)");
Option hostOption = OptionBuilder.withLongOpt(hostAddress)
.withDescription("Provide host name").create();
hostOption.setArgs(1);
hostOption.setRequired(true);
hostOption.setArgName("Host name (Required)");
Option portOption = OptionBuilder.withLongOpt(hostPort)
.withDescription("Provide host port").create();
portOption.setArgs(1);
portOption.setRequired(true);
portOption.setArgName("Host port (Required)");
Option cmTypeOption = OptionBuilder.withLongOpt(helixManagerType)
.withDescription("Provide cluster manager type (e.g. 'zk', 'static-file', or 'dynamic-file'").create();
cmTypeOption.setArgs(1);
cmTypeOption.setRequired(true);
cmTypeOption.setArgName("Clsuter manager type (e.g. 'zk', 'static-file', or 'dynamic-file') (Required)");
Option zkServerOption = OptionBuilder.withLongOpt(zkServer)
.withDescription("Provide zookeeper address").create();
zkServerOption.setArgs(1);
zkServerOption.setRequired(true);
zkServerOption.setArgName("ZookeeperServerAddress(Required for zk-based cluster manager)");
// Option rootNsOption = OptionBuilder.withLongOpt(rootNamespace)
// .withDescription("Provide root namespace for dynamic-file based cluster manager").create();
// rootNsOption.setArgs(1);
// rootNsOption.setRequired(true);
// rootNsOption.setArgName("Root namespace (Required for dynamic-file based cluster manager)");
Option transDelayOption = OptionBuilder.withLongOpt(transDelay)
.withDescription("Provide state trans delay").create();
transDelayOption.setArgs(1);
transDelayOption.setRequired(false);
transDelayOption.setArgName("Delay time in state transition, in MS");
OptionGroup optionGroup = new OptionGroup();
optionGroup.addOption(zkServerOption);
Options options = new Options();
options.addOption(helpOption);
options.addOption(clusterOption);
options.addOption(hostOption);
options.addOption(portOption);
options.addOption(transDelayOption);
options.addOption(cmTypeOption);
options.addOptionGroup(optionGroup);
return options;
}
public static void printUsage(Options cliOptions)
{
HelpFormatter helpFormatter = new HelpFormatter();
helpFormatter.printHelp("java " + DummyProcess.class.getName(), cliOptions);
}
public static CommandLine processCommandLineArgs(String[] cliArgs)
throws Exception
{
CommandLineParser cliParser = new GnuParser();
Options cliOptions = constructCommandLineOptions();
// CommandLine cmd = null;
try
{
return cliParser.parse(cliOptions, cliArgs);
} catch (ParseException pe)
{
System.err
.println("CommandLineClient: failed to parse command-line options: "
+ pe.toString());
printUsage(cliOptions);
System.exit(1);
}
return null;
}
public static void main(String[] args) throws Exception
{
String cmType = "zk";
String zkConnectString = "localhost:2181";
String clusterName = "testCluster";
String instanceName = "localhost_8900";
String cvFileStr = null;
// String rootNs = null;
int delay = 0;
if (args.length > 0)
{
CommandLine cmd = processCommandLineArgs(args);
zkConnectString = cmd.getOptionValue(zkServer);
clusterName = cmd.getOptionValue(cluster);
String host = cmd.getOptionValue(hostAddress);
String portString = cmd.getOptionValue(hostPort);
int port = Integer.parseInt(portString);
instanceName = host + "_" + port;
cmType = cmd.getOptionValue(helixManagerType);
if (cmd.hasOption(transDelay))
{
try
{
delay = Integer.parseInt(cmd.getOptionValue(transDelay));
if (delay < 0)
{
throw new Exception("delay must be positive");
}
} catch (Exception e)
{
e.printStackTrace();
delay = 0;
}
}
}
// Espresso_driver.py will consume this
logger.info("Dummy process started, instanceName:" + instanceName);
DummyProcess process = new DummyProcess(zkConnectString,
clusterName,
instanceName,
cmType,
delay);
HelixManager manager = process.start();
try
{
Thread.currentThread().join();
}
catch (InterruptedException e)
{
// ClusterManagerFactory.disconnectManagers(instanceName);
logger.info("participant:" + instanceName + ", " +
Thread.currentThread().getName() + " interrupted");
// if (manager != null)
// {
// manager.disconnect();
// }
}
finally
{
if (manager != null)
{
manager.disconnect();
}
}
}
}