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.api.StateTransitionHandlerFactory;
import org.apache.helix.api.TransitionHandler;
import org.apache.helix.api.id.PartitionId;
import org.apache.helix.api.id.StateModelDefId;
import org.apache.helix.model.Message;
import org.apache.helix.participant.StateMachineEngine;
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";
private final String _zkConnectString;
private final String _clusterName;
private final String _instanceName;
private DummyStateModelFactory stateModelFactory;
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);
StateMachineEngine stateMach = manager.getStateMachineEngine();
stateMach.registerStateModelFactory(StateModelDefId.MasterSlave, stateModelFactory);
stateMach.registerStateModelFactory(StateModelDefId.LeaderStandby, stateModelFactory1);
stateMach.registerStateModelFactory(StateModelDefId.OnlineOffline, stateModelFactory2);
manager.connect();
return manager;
}
public static class DummyStateModelFactory extends StateTransitionHandlerFactory<DummyStateModel> {
int _delay;
public DummyStateModelFactory(int delay) {
_delay = delay;
}
@Override
public DummyStateModel createStateTransitionHandler(PartitionId partition) {
DummyStateModel model = new DummyStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyLeaderStandbyStateModelFactory extends
StateTransitionHandlerFactory<DummyLeaderStandbyStateModel> {
int _delay;
public DummyLeaderStandbyStateModelFactory(int delay) {
_delay = delay;
}
@Override
public DummyLeaderStandbyStateModel createStateTransitionHandler(PartitionId partition) {
DummyLeaderStandbyStateModel model = new DummyLeaderStandbyStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyOnlineOfflineStateModelFactory extends
StateTransitionHandlerFactory<DummyOnlineOfflineStateModel> {
int _delay;
public DummyOnlineOfflineStateModelFactory(int delay) {
_delay = delay;
}
@Override
public DummyOnlineOfflineStateModel createStateTransitionHandler(PartitionId partition) {
DummyOnlineOfflineStateModel model = new DummyOnlineOfflineStateModel();
model.setDelay(_delay);
return model;
}
}
public static class DummyStateModel extends TransitionHandler {
int _transDelay = 0;
public void setDelay(int delay) {
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeSlaveFromOffline(Message message, NotificationContext context) {
PartitionId db = message.getPartitionId();
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 TransitionHandler {
int _transDelay = 0;
public void setDelay(int delay) {
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeOnlineFromOffline(Message message, NotificationContext context) {
PartitionId db = message.getPartitionId();
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 TransitionHandler {
int _transDelay = 0;
public void setDelay(int delay) {
_transDelay = delay > 0 ? delay : 0;
}
public void onBecomeLeaderFromStandby(Message message, NotificationContext context) {
PartitionId db = message.getPartitionId();
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();
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";
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();
}
}
}
}