javax.batch.api.Decider Maven / Gradle / Ivy
/*
* Copyright 2012 International Business Machines Corp.
*
* See the NOTICE file distributed with this work for additional information
* regarding copyright ownership. 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
*
* http://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 javax.batch.api;
import javax.batch.runtime.context.BatchContext;
/**
* Decider determines batch exit status and to influence sequencing between
* steps, splits, and flows in a Job XML. The decider returns a String value
* which becomes the exit status value on which the decision chooses the next
* transition.
*
* @param
* specifies the type of the transient data in the batch context.
*/
public interface Decider {
/**
* The decide method receives control during job processing to set exit
* status between a step, split, or flow. The return value updates the
* current job execution's exit status.
*
* @param ctx
* specifies the last execution element's batch context. It may
* be a StepContext, FlowContext, or SplitContext.
* @return updated job exit status
* @throws Exception
* is thrown if an error occurs.
*/
public String decide(BatchContext ctx) throws Exception;
}