spring-batch CallableTaskletAdapter 源码
spring-batch CallableTaskletAdapter 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/step/tasklet/CallableTaskletAdapter.java
/*
* Copyright 2006-2019 the original author or authors.
*
* Licensed 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
*
* https://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.springframework.batch.core.step.tasklet;
import java.util.concurrent.Callable;
import org.springframework.batch.core.StepContribution;
import org.springframework.batch.core.scope.context.ChunkContext;
import org.springframework.batch.repeat.RepeatStatus;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
/**
* Adapts a {@link Callable}<{@link RepeatStatus}> to the {@link Tasklet} interface.
*
* @author Dave Syer
*
*/
public class CallableTaskletAdapter implements Tasklet, InitializingBean {
private Callable<RepeatStatus> callable;
/**
* Public setter for the {@link Callable}.
* @param callable the {@link Callable} to set
*/
public void setCallable(Callable<RepeatStatus> callable) {
this.callable = callable;
}
/**
* Assert that the callable is set.
*
* @see org.springframework.beans.factory.InitializingBean#afterPropertiesSet()
*/
@Override
public void afterPropertiesSet() throws Exception {
Assert.notNull(callable, "A Callable is required");
}
/**
* Execute the provided Callable and return its {@link RepeatStatus}. Ignores the
* {@link StepContribution} and the attributes.
* @see Tasklet#execute(StepContribution, ChunkContext)
*/
@Nullable
@Override
public RepeatStatus execute(StepContribution contribution, ChunkContext chunkContext) throws Exception {
return callable.call();
}
}
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