001/* 002 * Copyright 2006-2013 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.springframework.batch.core.step.tasklet; 017 018import java.util.concurrent.Callable; 019 020import org.springframework.batch.core.StepContribution; 021import org.springframework.batch.core.scope.context.ChunkContext; 022import org.springframework.batch.repeat.RepeatStatus; 023import org.springframework.beans.factory.InitializingBean; 024import org.springframework.util.Assert; 025 026/** 027 * Adapts a {@link Callable}<{@link RepeatStatus}> to the {@link Tasklet} 028 * interface. 029 * 030 * @author Dave Syer 031 * 032 */ 033public class CallableTaskletAdapter implements Tasklet, InitializingBean { 034 035 private Callable<RepeatStatus> callable; 036 037 /** 038 * Public setter for the {@link Callable}. 039 * @param callable the {@link Callable} to set 040 */ 041 public void setCallable(Callable<RepeatStatus> callable) { 042 this.callable = callable; 043 } 044 045 /** 046 * Assert that the callable is set. 047 * 048 * @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet() 049 */ 050 @Override 051 public void afterPropertiesSet() throws Exception { 052 Assert.notNull(callable, "A Callable is required"); 053 } 054 055 /** 056 * Execute the provided Callable and return its {@link RepeatStatus}. Ignores 057 * the {@link StepContribution} and the attributes. 058 * @see Tasklet#execute(StepContribution, ChunkContext) 059 */ 060 @Override 061 public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception { 062 return callable.call(); 063 } 064 065}