spring-batch RepeatContext 源码
spring-batch RepeatContext 代码
文件路径：/spring-batch-infrastructure/src/main/java/org/springframework/batch/repeat/RepeatContext.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.repeat;
import org.springframework.core.AttributeAccessor;
/**
* Base interface for context which controls the state and completion / termination of a
* batch step. A new context is created for each call to the {@link RepeatOperations}.
* Within a batch callback code can communicate via the {@link AttributeAccessor}
* interface.
*
* @author Dave Syer
* @see RepeatOperations#iterate(RepeatCallback)
*
*/
public interface RepeatContext extends AttributeAccessor {
/**
* If batches are nested, then the inner batch will be created with the outer one as a
* parent. This is an accessor for the parent if it exists.
* @return the parent context or null if there is none
*/
RepeatContext getParent();
/**
* Public access to a counter for the number of operations attempted.
* @return the number of batch operations started.
*/
int getStartedCount();
/**
* Signal to the framework that the current batch should complete normally,
* independent of the current {@link CompletionPolicy}.
*/
void setCompleteOnly();
/**
* Public accessor for the complete flag.
* @return indicator if the repeat is complete
*/
boolean isCompleteOnly();
/**
* Signal to the framework that the current batch should complete abnormally,
* independent of the current {@link CompletionPolicy}.
*/
void setTerminateOnly();
/**
* Public accessor for the termination flag. If this flag is set then the complete
* flag will also be.
* @return indicates if the repeat should terminate
*/
boolean isTerminateOnly();
/**
* Register a callback to be executed on close, associated with the attribute having
* the given name. The {@link Runnable} callback should not throw any exceptions.
* @param name the name of the attribute to associated this callback with. If this
* attribute is removed the callback should never be called.
* @param callback a {@link Runnable} to execute when the context is closed.
*/
void registerDestructionCallback(String name, Runnable callback);
/**
* Allow resources to be cleared, especially in destruction callbacks. Implementations
* should ensure that any registered destruction callbacks are executed here, as long
* as the corresponding attribute is still available.
*/
void close();
}
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