| package org.apache.helix.model; |
| |
| /* |
| * 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.HelixDefinedState; |
| import org.apache.helix.ZNRecord; |
| import org.apache.helix.manager.zk.DefaultSchedulerMessageHandlerFactory; |
| import org.apache.helix.model.builder.StateTransitionTableBuilder; |
| |
| /** |
| * Helix built-in SchedulerTaskQueue state model definition |
| */ |
| public final class ScheduledTaskSMD extends StateModelDefinition { |
| public static final String name = DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE; |
| |
| public enum States { |
| COMPLETED, |
| OFFLINE |
| } |
| |
| public ScheduledTaskSMD() { |
| super(generateConfigForScheduledTaskQueue()); |
| } |
| |
| /** |
| * Build SchedulerTaskQueue state model definition |
| * @return |
| */ |
| public static StateModelDefinition build() { |
| StateModelDefinition.Builder builder =new StateModelDefinition.Builder(name); |
| // init state |
| builder.initialState(States.OFFLINE.name()); |
| |
| // add states |
| builder.addState(States.COMPLETED.name(), 0); |
| builder.addState(States.OFFLINE.name(), 1); |
| for (HelixDefinedState state : HelixDefinedState.values()) { |
| builder.addState(state.name()); |
| } |
| |
| // add transitions |
| builder.addTransition(States.COMPLETED.name(), States.OFFLINE.name(), 0); |
| builder.addTransition(States.OFFLINE.name(), States.COMPLETED.name(), 1); |
| builder.addTransition(States.OFFLINE.name(), HelixDefinedState.DROPPED.name()); |
| |
| // bounds |
| builder.dynamicUpperBound(States.COMPLETED.name(), "1"); |
| |
| return builder.build(); |
| } |
| |
| /** |
| * Generate SchedulerTaskQueue state model definition |
| * Replaced by SchedulerTaskQueueSMD#build() |
| * @return |
| */ |
| @Deprecated |
| public static ZNRecord generateConfigForScheduledTaskQueue() { |
| ZNRecord record = new ZNRecord(DefaultSchedulerMessageHandlerFactory.SCHEDULER_TASK_QUEUE); |
| record.setSimpleField(StateModelDefinitionProperty.INITIAL_STATE.toString(), "OFFLINE"); |
| List<String> statePriorityList = new ArrayList<String>(); |
| statePriorityList.add("COMPLETED"); |
| 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("COMPLETED")) { |
| metadata.put("count", "1"); |
| 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); |
| } |
| } |
| |
| List<String> states = new ArrayList<String>(); |
| states.add("COMPLETED"); |
| states.add("DROPPED"); |
| states.add("OFFLINE"); |
| |
| List<Transition> transitions = new ArrayList<Transition>(); |
| transitions.add(new Transition("OFFLINE", "COMPLETED")); |
| transitions.add(new Transition("OFFLINE", "DROPPED")); |
| transitions.add(new Transition("COMPLETED", "DROPPED")); |
| |
| StateTransitionTableBuilder builder = new StateTransitionTableBuilder(); |
| Map<String, Map<String, String>> next = builder.buildTransitionTable(states, transitions); |
| |
| for (String state : statePriorityList) { |
| String key = state + ".next"; |
| record.setMapField(key, next.get(state)); |
| } |
| List<String> stateTransitionPriorityList = new ArrayList<String>(); |
| stateTransitionPriorityList.add("OFFLINE-COMPLETED"); |
| stateTransitionPriorityList.add("OFFLINE-DROPPED"); |
| stateTransitionPriorityList.add("COMPLETED-DROPPED"); |
| |
| record.setListField(StateModelDefinitionProperty.STATE_TRANSITION_PRIORITYLIST.toString(), |
| stateTransitionPriorityList); |
| return record; |
| } |
| } |