| 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.NotificationContext; |
| import org.apache.helix.model.Message; |
| import org.apache.helix.participant.statemachine.StateModel; |
| import org.apache.helix.participant.statemachine.StateModelFactory; |
| |
| public class LeaderStandbyStateModelFactory extends StateModelFactory<StateModel> { |
| int _delay; |
| String _instanceName = ""; |
| |
| public LeaderStandbyStateModelFactory(int delay) { |
| _delay = delay; |
| } |
| |
| public LeaderStandbyStateModelFactory(String instanceName) { |
| _instanceName = instanceName; |
| _delay = 10; |
| } |
| |
| public LeaderStandbyStateModelFactory(String instanceName, int delay) { |
| _instanceName = instanceName; |
| _delay = delay; |
| } |
| |
| public LeaderStandbyStateModelFactory() { |
| this(10); |
| } |
| |
| public void setInstanceName(String instanceName) { |
| _instanceName = instanceName; |
| } |
| |
| @Override public StateModel createNewStateModel(String resourceName, String partitionName) { |
| LeaderStandbyStateModel stateModel = new LeaderStandbyStateModel(); |
| stateModel.setDelay(_delay); |
| stateModel.setInstanceName(_instanceName); |
| stateModel.setPartitionName(partitionName); |
| return stateModel; |
| } |
| |
| public static class LeaderStandbyStateModel extends StateModel { |
| int _transDelay = 0; |
| String partitionName; |
| String _instanceName = ""; |
| |
| public String getPartitionName() { |
| return partitionName; |
| } |
| |
| public void setPartitionName(String partitionName) { |
| this.partitionName = partitionName; |
| } |
| |
| public void setInstanceName(String instanceName) { |
| _instanceName = instanceName; |
| } |
| |
| |
| public void setDelay(int delay) { |
| _transDelay = delay > 0 ? delay : 0; |
| } |
| |
| public void onBecomeLeaderFromStandby(Message message, NotificationContext context) { |
| System.out.println("LeaderStandbyStateModel.onBecomeLeaderFromStandby():" + _instanceName |
| + " transitioning from " + message.getFromState() + " to " + message.getToState() |
| + " for " + message.getResourceName() + " " + message.getPartitionName()); |
| sleep(); |
| } |
| |
| public void onBecomeStandbyFromLeader(Message message, NotificationContext context) { |
| System.out.println("LeaderStandbyStateModel.onBecomeStandbyFromLeader():" + _instanceName |
| + " transitioning from " + message.getFromState() + " to " + message.getToState() |
| + " for " + message.getResourceName() + " " + message.getPartitionName()); |
| sleep(); |
| } |
| |
| public void onBecomeStandbyFromOffline(Message message, NotificationContext context) { |
| System.out.println("LeaderStandbyStateModel.onBecomeStandbyFromOffline():" + _instanceName |
| + " transitioning from " + message.getFromState() + " to " + message.getToState() |
| + " for " + message.getResourceName() + " " + message.getPartitionName()); |
| sleep(); |
| } |
| |
| public void onBecomeOfflineFromStandby(Message message, NotificationContext context) { |
| System.out.println("LeaderStandbyStateModel.onBecomeOfflineFromStandby():" + _instanceName |
| + " transitioning from " + message.getFromState() + " to " + message.getToState() |
| + " for " + message.getResourceName() + " " + message.getPartitionName()); |
| sleep(); |
| } |
| |
| public void onBecomeDroppedFromOffline(Message message, NotificationContext context) { |
| System.out.println("LeaderStandbyStateModel.onBecomeDroppedFromOffline():" + _instanceName |
| + " transitioning from " + message.getFromState() + " to " + message.getToState() |
| + " for " + message.getResourceName() + " " + message.getPartitionName()); |
| sleep(); |
| |
| } |
| |
| private void sleep() { |
| try { |
| Thread.sleep(_transDelay); |
| } catch (Exception e) { |
| e.printStackTrace(); |
| } |
| } |
| } |
| } |