package org.apache.helix.tools;
/*
* 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 java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.helix.ZNRecord;
import org.apache.helix.manager.zk.ZNRecordSerializer;
import org.apache.helix.model.StateModelDefinition.StateModelDefinitionProperty;
public class StateModelConfigGenerator
{
public static void main(String[] args)
{
ZNRecordSerializer serializer = new ZNRecordSerializer();
StateModelConfigGenerator generator = new StateModelConfigGenerator();
System.out.println(new String(serializer.serialize(generator.generateConfigForMasterSlave())));
}
/**
* count -1 dont care any numeric value > 0 will be tried to be satisfied based on
* priority N all nodes in the cluster will be assigned to this state if possible R all
* remaining nodes in the preference list will be assigned to this state, applies only
* to last state
*/
public ZNRecord generateConfigForStorageSchemata()
{
ZNRecord record = new ZNRecord("STORAGE_DEFAULT_SM_SCHEMATA");
record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
"OFFLINE");
List<String> statePriorityList = new ArrayList<String>();
statePriorityList.add("MASTER");
statePriorityList.add("OFFLINE");
statePriorityList.add("DROPPED");
statePriorityList.add("ERROR");
record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
statePriorityList);
for (String state : statePriorityList)
{
String key = state + ".meta";
Map<String, String> metadata = new HashMap<String, String>();
if (state.equals("MASTER"))
{
metadata.put("count", "N");
record.setMapField(key, metadata);
}
else if (state.equals("OFFLINE"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
else if (state.equals("DROPPED"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
else if (state.equals("ERROR"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
}
for (String state : statePriorityList)
{
String key = state + ".next";
if (state.equals("MASTER"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("OFFLINE", "OFFLINE");
metadata.put("DROPPED", "OFFLINE");
record.setMapField(key, metadata);
}
if (state.equals("OFFLINE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("MASTER", "MASTER");
metadata.put("DROPPED", "DROPPED");
record.setMapField(key, metadata);
}
if (state.equals("ERROR"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("OFFLINE", "OFFLINE");
record.setMapField(key, metadata);
}
}
List<String> stateTransitionPriorityList = new ArrayList<String>();
stateTransitionPriorityList.add("MASTER-OFFLINE");
stateTransitionPriorityList.add("OFFLINE-MASTER");
record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
stateTransitionPriorityList);
return record;
}
public ZNRecord generateConfigForMasterSlave()
{
ZNRecord record = new ZNRecord("MasterSlave");
record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
"OFFLINE");
List<String> statePriorityList = new ArrayList<String>();
statePriorityList.add("MASTER");
statePriorityList.add("SLAVE");
statePriorityList.add("OFFLINE");
statePriorityList.add("DROPPED");
statePriorityList.add("ERROR");
record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
statePriorityList);
for (String state : statePriorityList)
{
String key = state + ".meta";
Map<String, String> metadata = new HashMap<String, String>();
if (state.equals("MASTER"))
{
metadata.put("count", "1");
record.setMapField(key, metadata);
}
else if (state.equals("SLAVE"))
{
metadata.put("count", "R");
record.setMapField(key, metadata);
}
else if (state.equals("OFFLINE"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
else if (state.equals("DROPPED"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
else if (state.equals("ERROR"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
}
for (String state : statePriorityList)
{
String key = state + ".next";
if (state.equals("MASTER"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("SLAVE", "SLAVE");
metadata.put("OFFLINE", "SLAVE");
metadata.put("DROPPED", "SLAVE");
record.setMapField(key, metadata);
}
else if (state.equals("SLAVE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("MASTER", "MASTER");
metadata.put("OFFLINE", "OFFLINE");
metadata.put("DROPPED", "OFFLINE");
record.setMapField(key, metadata);
}
else if (state.equals("OFFLINE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("SLAVE", "SLAVE");
metadata.put("MASTER", "SLAVE");
metadata.put("DROPPED", "DROPPED");
record.setMapField(key, metadata);
}
else if (state.equals("ERROR"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("OFFLINE", "OFFLINE");
record.setMapField(key, metadata);
}
}
List<String> stateTransitionPriorityList = new ArrayList<String>();
stateTransitionPriorityList.add("MASTER-SLAVE");
stateTransitionPriorityList.add("SLAVE-MASTER");
stateTransitionPriorityList.add("OFFLINE-SLAVE");
stateTransitionPriorityList.add("SLAVE-OFFLINE");
stateTransitionPriorityList.add("OFFLINE-DROPPED");
record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
stateTransitionPriorityList);
return record;
// ZNRecordSerializer serializer = new ZNRecordSerializer();
// System.out.println(new String(serializer.serialize(record)));
}
public ZNRecord generateConfigForLeaderStandby()
{
ZNRecord record = new ZNRecord("LeaderStandby");
record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
"OFFLINE");
List<String> statePriorityList = new ArrayList<String>();
statePriorityList.add("LEADER");
statePriorityList.add("STANDBY");
statePriorityList.add("OFFLINE");
statePriorityList.add("DROPPED");
record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
statePriorityList);
for (String state : statePriorityList)
{
String key = state + ".meta";
Map<String, String> metadata = new HashMap<String, String>();
if (state.equals("LEADER"))
{
metadata.put("count", "1");
record.setMapField(key, metadata);
}
if (state.equals("STANDBY"))
{
metadata.put("count", "R");
record.setMapField(key, metadata);
}
if (state.equals("OFFLINE"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
if (state.equals("DROPPED"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
}
for (String state : statePriorityList)
{
String key = state + ".next";
if (state.equals("LEADER"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("STANDBY", "STANDBY");
metadata.put("OFFLINE", "STANDBY");
metadata.put("DROPPED", "STANDBY");
record.setMapField(key, metadata);
}
if (state.equals("STANDBY"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("LEADER", "LEADER");
metadata.put("OFFLINE", "OFFLINE");
metadata.put("DROPPED", "OFFLINE");
record.setMapField(key, metadata);
}
if (state.equals("OFFLINE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("STANDBY", "STANDBY");
metadata.put("LEADER", "STANDBY");
metadata.put("DROPPED", "DROPPED");
record.setMapField(key, metadata);
}
}
List<String> stateTransitionPriorityList = new ArrayList<String>();
stateTransitionPriorityList.add("LEADER-STANDBY");
stateTransitionPriorityList.add("STANDBY-LEADER");
stateTransitionPriorityList.add("OFFLINE-STANDBY");
stateTransitionPriorityList.add("STANDBY-OFFLINE");
stateTransitionPriorityList.add("OFFLINE-DROPPED");
record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
stateTransitionPriorityList);
return record;
// ZNRecordSerializer serializer = new ZNRecordSerializer();
// System.out.println(new String(serializer.serialize(record)));
}
public ZNRecord generateConfigForOnlineOffline()
{
ZNRecord record = new ZNRecord("OnlineOffline");
record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(),
"OFFLINE");
List<String> statePriorityList = new ArrayList<String>();
statePriorityList.add("ONLINE");
statePriorityList.add("OFFLINE");
statePriorityList.add("DROPPED");
record.setListField(StateModelDefinitionProperty.STATE_PRIORITY_LIST.toString(),
statePriorityList);
for (String state : statePriorityList)
{
String key = state + ".meta";
Map<String, String> metadata = new HashMap<String, String>();
if (state.equals("ONLINE"))
{
metadata.put("count", "R");
record.setMapField(key, metadata);
}
if (state.equals("OFFLINE"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
if (state.equals("DROPPED"))
{
metadata.put("count", "-1");
record.setMapField(key, metadata);
}
}
for (String state : statePriorityList)
{
String key = state + ".next";
if (state.equals("ONLINE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("OFFLINE", "OFFLINE");
metadata.put("DROPPED", "OFFLINE");
record.setMapField(key, metadata);
}
if (state.equals("OFFLINE"))
{
Map<String, String> metadata = new HashMap<String, String>();
metadata.put("ONLINE", "ONLINE");
metadata.put("DROPPED", "DROPPED");
record.setMapField(key, metadata);
}
}
List<String> stateTransitionPriorityList = new ArrayList<String>();
stateTransitionPriorityList.add("OFFLINE-ONLINE");
stateTransitionPriorityList.add("ONLINE-OFFLINE");
stateTransitionPriorityList.add("OFFLINE-DROPPED");
record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(),
stateTransitionPriorityList);
return record;
// ZNRecordSerializer serializer = new ZNRecordSerializer();
// System.out.println(new String(serializer.serialize(record)));
}
}