spring-batch ChunkListener 源码
spring-batch ChunkListener 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/ChunkListener.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;
import org.springframework.batch.core.scope.context.ChunkContext;
/**
* Listener interface for the lifecycle of a chunk. A chunk can be thought of as a
* collection of items that are committed together.
*
* @author Lucas Ward
* @author Michael Minella
* @author Mahmoud Ben Hassine
* @author Parikshit Dutta
*/
public interface ChunkListener extends StepListener {
/**
* The key for retrieving the rollback exception.
*/
String ROLLBACK_EXCEPTION_KEY = "sb_rollback_exception";
/**
* Callback before the chunk is executed, but inside the transaction.
* @param context The current {@link ChunkContext}
*/
default void beforeChunk(ChunkContext context) {
}
/**
* Callback after the chunk is executed, outside the transaction.
* @param context The current {@link ChunkContext}
*/
default void afterChunk(ChunkContext context) {
}
/**
* Callback after a chunk has been marked for rollback. It is invoked after
* transaction rollback. While the rollback will have occurred, transactional
* resources might still be active and accessible. Due to this, data access code
* within this callback still "participates" in the original transaction unless it
* declares that it runs in its own transaction. <em>As a result, you should use
* {@code PROPAGATION_REQUIRES_NEW} for any transactional operation that is called
* from here.</em>
* @param context the chunk context containing the exception that caused the
* underlying rollback.
*/
default void afterChunkError(ChunkContext context) {
}
}
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