org.springframework.batch.item.ItemStream Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of spring-batch-infrastructure Show documentation
Show all versions of spring-batch-infrastructure Show documentation
The Spring Batch Infrastructure is a set of low-level components, interfaces and tools for batch processing applications and optimisations.
/*
* 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.item;
/**
*
* Marker interface defining a contract for periodically storing state and restoring from
* that state should an error occur.
*
*
* @author Dave Syer
* @author Lucas Ward
* @author Mahmoud Ben Hassine
*
*/
public interface ItemStream {
/**
* Open the stream for the provided {@link ExecutionContext}.
* @param executionContext current step's
* {@link org.springframework.batch.item.ExecutionContext}. Will be the
* executionContext from the last run of the step on a restart.
* @throws IllegalArgumentException if context is null
*/
default void open(ExecutionContext executionContext) throws ItemStreamException {
}
/**
* Indicates that the execution context provided during open is about to be saved. If
* any state is remaining, but has not been put in the context, it should be added
* here.
* @param executionContext to be updated
* @throws IllegalArgumentException if executionContext is null.
*/
default void update(ExecutionContext executionContext) throws ItemStreamException {
}
/**
* If any resources are needed for the stream to operate they need to be destroyed
* here. Once this method has been called all other methods (except open) may throw an
* exception.
*/
default void close() throws ItemStreamException {
}
}