spring-batch ItemReadListener 源码
spring-batch ItemReadListener 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/ItemReadListener.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.item.ItemReader;
/**
* Listener interface around the reading of an item.
*
* @author Lucas Ward
* @author Mahmoud Ben Hassine
*
*/
public interface ItemReadListener<T> extends StepListener {
/**
* Called before {@link ItemReader#read()}
*/
default void beforeRead() {
}
/**
* Called after {@link ItemReader#read()}. This method is called only for actual items
* (that is, it is not called when the reader returns {@code null}).
* @param item returned from read()
*/
default void afterRead(T item) {
}
/**
* Called if an error occurs while trying to read.
* @param ex thrown from {@link ItemReader}
*/
default void onReadError(Exception ex) {
}
}
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