spring-batch ItemProcessListener 源码
spring-batch ItemProcessListener 代码
文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/ItemProcessListener.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.ItemProcessor;
import org.springframework.lang.Nullable;
/**
* Listener interface for the processing of an item. Implementations of this interface are
* notified before and after an item is passed to the {@link ItemProcessor} and in the
* event of any exceptions thrown by the processor.
*
* @author Dave Syer
* @author Mahmoud Ben Hassine
*
*/
public interface ItemProcessListener<T, S> extends StepListener {
/**
* Called before {@link ItemProcessor#process(Object)}.
* @param item to be processed.
*/
default void beforeProcess(T item) {
}
/**
* Called after {@link ItemProcessor#process(Object)} returns. If the processor
* returns {@code null}, this method is still called, with a {@code null} result,
* allowing for notification of "filtered" items.
* @param item to be processed
* @param result of processing
*/
default void afterProcess(T item, @Nullable S result) {
}
/**
* Called if an exception was thrown from {@link ItemProcessor#process(Object)}.
* @param item attempted to be processed
* @param e - exception thrown during processing.
*/
default void onProcessError(T item, Exception e) {
}
}
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