| /* |
| * 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.twill.api; |
| |
| /** |
| * A {@link TwillRunner} that provides lifecycle management functions. |
| * The {@link #start()} method needs to be called before calling any other method of this interface. |
| * When done with this service, call {@link #stop()} to release any resources that it holds. |
| */ |
| public interface TwillRunnerService extends TwillRunner { |
| |
| /** |
| * Starts the service. Calling this method on a already started instance has no effect. |
| * A service that is stopped cannot be started again. |
| * |
| * @throws RuntimeException if the service failed to start. |
| */ |
| void start(); |
| |
| /** |
| * Stops the service. Calling this method on a already stopped instance has no effect. |
| * |
| * @throws RuntimeException if the service failed to start. |
| */ |
| void stop(); |
| } |