spring-batch Step 源码
spring-batch Step 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/Step.java
/*
* Copyright 2006-2022 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;
/**
* Batch domain interface representing the configuration of a step. As with a {@link Job},
* a {@link Step} is meant to explicitly represent the configuration of a step by a
* developer but also the ability to execute the step.
*
* @author Dave Syer
* @author Mahmoud Ben Hassine
*
*/
public interface Step {
/**
* The key to use when retrieving the batch step type.
*/
String STEP_TYPE_KEY = "batch.stepType";
/**
* @return the name of this step.
*/
String getName();
/**
* @return {@code true} if a step that is already marked as complete can be started
* again. Defaults to {@code false}.
*/
default boolean isAllowStartIfComplete() {
return false;
}
/**
* @return the number of times a step can be (re)started for the same job instance.
* Defaults to {@code Integer.MAX_VALUE}
*/
default int getStartLimit() {
return Integer.MAX_VALUE;
}
/**
* Process the step and assign progress and status meta information to the
* {@link StepExecution} provided. The {@link Step} is responsible for setting the
* meta information and also saving it, if required by the implementation.<br>
*
* It is not safe to reuse an instance of {@link Step} to process multiple concurrent
* executions.
* @param stepExecution an entity representing the step to be executed.
* @throws JobInterruptedException if the step is interrupted externally.
*/
void execute(StepExecution stepExecution) throws JobInterruptedException;
}
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