| package org.apache.helix.lockmanager; |
| |
| /* |
| * 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.StateModelInfo; |
| import org.apache.helix.participant.statemachine.Transition; |
| |
| @StateModelInfo(initialState = "OFFLINE", states = { |
| "OFFLINE", "ONLINE" |
| }) |
| public class Lock extends StateModel { |
| private String lockName; |
| |
| public Lock(String lockName) { |
| this.lockName = lockName; |
| } |
| |
| @Transition(from = "OFFLINE", to = "ONLINE") |
| public void lock(Message m, NotificationContext context) { |
| System.out.println(context.getManager().getInstanceName() + " acquired lock:" + lockName); |
| } |
| |
| @Transition(from = "ONLINE", to = "OFFLINE") |
| public void release(Message m, NotificationContext context) { |
| System.out.println(context.getManager().getInstanceName() + " releasing lock:" + lockName); |
| } |
| |
| } |