| package org.apache.helix.examples; |
| |
| /* |
| * 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.helix.controller.HelixControllerMain; |
| import org.apache.helix.manager.zk.ZKHelixAdmin; |
| import org.apache.helix.manager.zk.ZNRecordSerializer; |
| import org.apache.helix.manager.zk.client.HelixZkClient; |
| import org.apache.helix.manager.zk.client.SharedZkClientFactory; |
| import org.apache.helix.model.IdealState; |
| import org.apache.helix.model.IdealState.RebalanceMode; |
| import org.apache.helix.model.InstanceConfig; |
| import org.apache.helix.model.StateModelDefinition; |
| import org.apache.helix.model.builder.CustomModeISBuilder; |
| import org.apache.helix.model.builder.FullAutoModeISBuilder; |
| import org.apache.helix.model.builder.SemiAutoModeISBuilder; |
| import org.apache.helix.tools.StateModelConfigGenerator; |
| |
| public class IdealStateBuilderExample { |
| |
| private static String buildPartitionName(String resourceName, int partitionNum) { |
| return resourceName + "_" + partitionNum; |
| } |
| |
| public static void main(String[] args) { |
| |
| if (args.length < 3) { |
| System.err |
| .println("USAGE: java IdealStateBuilderExample zkAddress clusterName idealStateMode" |
| + " (FULL_AUTO, SEMI_AUTO, CUSTOMIZED, or USER_DEFINED)"); |
| System.exit(1); |
| } |
| |
| final String zkAddr = args[0]; |
| final String clusterName = args[1]; |
| RebalanceMode idealStateMode = RebalanceMode.valueOf(args[2].toUpperCase()); |
| |
| HelixZkClient.ZkClientConfig clientConfig = new HelixZkClient.ZkClientConfig(); |
| clientConfig.setZkSerializer(new ZNRecordSerializer()); |
| final HelixZkClient zkClient = SharedZkClientFactory.getInstance() |
| .buildZkClient(new HelixZkClient.ZkConnectionConfig(zkAddr), clientConfig); |
| ZKHelixAdmin admin = new ZKHelixAdmin(zkClient); |
| |
| // add cluster |
| admin.addCluster(clusterName, true); |
| |
| // add MasterSlave state model definition |
| admin.addStateModelDef(clusterName, "MasterSlave", new StateModelDefinition( |
| StateModelConfigGenerator.generateConfigForMasterSlave())); |
| |
| // add 2 participants: "localhost:{12918, 12919}" |
| int n = 2; |
| for (int i = 0; i < n; i++) { |
| int port = 12918 + i; |
| InstanceConfig config = new InstanceConfig("localhost_" + port); |
| config.setHostName("localhost"); |
| config.setPort(Integer.toString(port)); |
| config.setInstanceEnabled(true); |
| admin.addInstance(clusterName, config); |
| } |
| |
| // add ideal-state according to ideal-state-mode |
| String resourceName = "TestDB"; |
| IdealState idealState = null; |
| switch (idealStateMode) { |
| case SEMI_AUTO: { |
| SemiAutoModeISBuilder builder = new SemiAutoModeISBuilder(resourceName); |
| builder.setStateModel("MasterSlave").setNumPartitions(2).setNumReplica(2); |
| builder.assignPreferenceList(buildPartitionName(resourceName, 0), "localhost_12918", |
| "localhost_12919").assignPreferenceList(buildPartitionName(resourceName, 1), |
| "localhost_12919", "localhost_12918"); |
| |
| idealState = builder.build(); |
| break; |
| } |
| case FULL_AUTO: { |
| FullAutoModeISBuilder builder = new FullAutoModeISBuilder(resourceName); |
| builder.setStateModel("MasterSlave").setNumPartitions(2).setNumReplica(2) |
| .setMaxPartitionsPerNode(2); |
| builder.add(buildPartitionName(resourceName, 0)).add(buildPartitionName(resourceName, 1)); |
| |
| idealState = builder.build(); |
| break; |
| } |
| case CUSTOMIZED: { |
| CustomModeISBuilder builder = new CustomModeISBuilder(resourceName); |
| builder.setStateModel("MasterSlave").setNumPartitions(2).setNumReplica(2); |
| builder |
| .assignInstanceAndState(buildPartitionName(resourceName, 0), "localhost_12918", "MASTER") |
| .assignInstanceAndState(buildPartitionName(resourceName, 0), "localhost_12919", "SLAVE") |
| .assignInstanceAndState(buildPartitionName(resourceName, 1), "localhost_12918", "SLAVE") |
| .assignInstanceAndState(buildPartitionName(resourceName, 1), "localhost_12919", "MASTER"); |
| idealState = builder.build(); |
| break; |
| } |
| default: |
| break; |
| } |
| |
| admin.addResource(clusterName, resourceName, idealState); |
| |
| // start helix controller |
| new Thread(new Runnable() { |
| @Override |
| public void run() { |
| try { |
| HelixControllerMain.main(new String[] { |
| "--zkSvr", zkAddr, "--cluster", clusterName |
| }); |
| } catch (Exception e) { |
| // TODO Auto-generated catch block |
| e.printStackTrace(); |
| } |
| } |
| }).start(); |
| |
| // start dummy participants |
| for (int i = 0; i < n; i++) { |
| int port = 12918 + i; |
| final String instanceName = "localhost_" + port; |
| new Thread(new Runnable() { |
| @Override |
| public void run() { |
| DummyParticipant.main(new String[] { |
| zkAddr, clusterName, instanceName |
| }); |
| } |
| }).start(); |
| } |
| } |
| } |