spring-batch ChunkHandler 源码
spring-batch ChunkHandler 代码
文件路径：/spring-batch-integration/src/main/java/org/springframework/batch/integration/chunk/ChunkHandler.java
/*
* Copyright 2006-2007 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.integration.chunk;
/**
* Interface for a remote worker in the Remote Chunking pattern. A request comes from a
* manager process containing some items to be processed. Once the items are done with a
* response needs to be generated containing a summary of the result.
*
* @author Dave Syer
* @param <T> the type of the items to be processed (it is recommended to use a Memento
* like a primary key)
*/
public interface ChunkHandler<T> {
/**
* Handle the chunk, processing all the items and returning a response summarising the
* result. If the result is a failure then the response should say so. The handler
* only throws an exception if it needs to roll back a transaction and knows that the
* request will be re-delivered (if not to the same handler then to one processing the
* same Step).
* @param chunk a request containing the chunk to process
* @return a response summarising the result
* @throws Exception if the handler needs to roll back a transaction and have the
* chunk re-delivered
*/
ChunkResponse handleChunk(ChunkRequest<T> chunk) throws Exception;
}
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