spring-batch RepeatListener 源码
spring-batch RepeatListener 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/repeat/RepeatListener.java
/*
* Copyright 2006-2021 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.repeat;
/**
* Interface for listeners to the batch process. Implementers can provide enhance the
* behaviour of a batch in small cross-cutting modules. The framework provides callbacks
* at key points in the processing.
*
* @author Dave Syer
* @author Mahmoud Ben Hassine
*
*/
public interface RepeatListener {
/**
* Called by the framework before each batch item. Implementers can halt a batch by
* setting the complete flag on the context.
* @param context the current batch context.
*/
default void before(RepeatContext context) {
}
/**
* Called by the framework after each item has been processed, unless the item
* processing results in an exception. This method is called as soon as the result is
* known.
* @param context the current batch context
* @param result the result of the callback
*/
default void after(RepeatContext context, RepeatStatus result) {
}
/**
* Called once at the start of a complete batch, before any items are processed.
* Implementers can use this method to acquire any resources that might be needed
* during processing. Implementers can halt the current operation by setting the
* complete flag on the context. To halt all enclosing batches (the whole job), the
* would need to use the parent context (recursively).
* @param context the current batch context
*/
default void open(RepeatContext context) {
}
/**
* Called when a repeat callback fails by throwing an exception. There will be one
* call to this method for each exception thrown during a repeat operation (e.g. a
* chunk).<br>
*
* There is no need to re-throw the exception here - that will be done by the
* enclosing framework.
* @param context the current batch context
* @param e the error that was encountered in an item callback.
*/
default void onError(RepeatContext context, Throwable e) {
}
/**
* Called once at the end of a complete batch, after normal or abnormal completion
* (i.e. even after an exception). Implementers can use this method to clean up any
* resources.
* @param context the current batch context.
*/
default void close(RepeatContext context) {
}
}
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