| 1 | /* |
| 2 | * Copyright 2006-2007 the original author or authors. |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | package org.springframework.batch.core.step.tasklet; |
| 17 | |
| 18 | import java.util.concurrent.Callable; |
| 19 | |
| 20 | import org.springframework.batch.core.StepContribution; |
| 21 | import org.springframework.batch.core.scope.context.ChunkContext; |
| 22 | import org.springframework.batch.repeat.RepeatStatus; |
| 23 | import org.springframework.beans.factory.InitializingBean; |
| 24 | import org.springframework.util.Assert; |
| 25 | |
| 26 | /** |
| 27 | * Adapts a {@link Callable}<{@link RepeatStatus}> to the {@link Tasklet} |
| 28 | * interface. |
| 29 | * |
| 30 | * @author Dave Syer |
| 31 | * |
| 32 | */ |
| 33 | public class CallableTaskletAdapter implements Tasklet, InitializingBean { |
| 34 | |
| 35 | private Callable<RepeatStatus> callable; |
| 36 | |
| 37 | /** |
| 38 | * Public setter for the {@link Callable}. |
| 39 | * @param callable the {@link Callable} to set |
| 40 | */ |
| 41 | public void setCallable(Callable<RepeatStatus> callable) { |
| 42 | this.callable = callable; |
| 43 | } |
| 44 | |
| 45 | /** |
| 46 | * Assert that the callable is set. |
| 47 | * |
| 48 | * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet() |
| 49 | */ |
| 50 | public void afterPropertiesSet() throws Exception { |
| 51 | Assert.notNull(callable); |
| 52 | } |
| 53 | |
| 54 | /** |
| 55 | * Execute the provided Callable and return its {@link RepeatStatus}. Ignores |
| 56 | * the {@link StepContribution} and the attributes. |
| 57 | * @see Tasklet#execute(StepContribution, ChunkContext) |
| 58 | */ |
| 59 | public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception { |
| 60 | return callable.call(); |
| 61 | } |
| 62 | |
| 63 | } |