| /* |
| * 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. |
| */ |
| |
| package org.apache.slider.providers.agent; |
| |
| /** The states a component instance can be. */ |
| public enum Command { |
| NOP, // do nothing |
| INSTALL, // Install the component |
| INSTALL_ADDON, // Install add on packages if any |
| START, // Start the component |
| STOP, // Stop the component |
| UPGRADE, // The component will undergo upgrade |
| TERMINATE; // Send terminate signal to agent |
| |
| public static Command getCommand(String commandVal) { |
| if (commandVal.equals(Command.START.toString())) { |
| return Command.START; |
| } |
| if (commandVal.equals(Command.INSTALL.toString())) { |
| return Command.INSTALL; |
| } |
| if (commandVal.equals(Command.STOP.toString())) { |
| return Command.STOP; |
| } |
| if (commandVal.equals(Command.UPGRADE.toString())) { |
| return Command.UPGRADE; |
| } |
| if (commandVal.equals(Command.TERMINATE.toString())) { |
| return Command.TERMINATE; |
| } |
| |
| return Command.NOP; |
| } |
| |
| public static String transform(Command command, boolean isUpgrade) { |
| switch (command) { |
| case STOP: |
| return isUpgrade ? "UPGRADE_STOP" : command.name(); |
| default: |
| return command.name(); |
| } |
| } |
| } |