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/*
 * 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.partition;

import java.io.Serializable;

import javax.batch.runtime.BatchStatus;
/**
 * PartitionAnalyzer receives control to process  
 * data and final results from each partition. If
 * a PartitionCollector is configured on the step,  
 * the PartitionAnalyzer receives control to process 
 * the data and results from the partition collector.  
 * While a separate PartitionCollector instance is 
 * invoked on each thread processing a step partition,  
 * a single PartitionAnalyzer instance runs on a single, 
 * consistent thread each time it is invoked.  
 *
 */
public interface PartitionAnalyzer {
	/**
	 * The analyzeCollectorData method receives 
	 * control each time a Partition collector sends 
	 * its payload.  It receives the 
	 * Serializable object from the collector as an
	 * input.
	 * @param data specifies the payload sent by a 
	 * PartitionCollector. 
	 * @throws Exception is thrown if an error occurs.
	 */
	public void analyzeCollectorData(Serializable data) throws Exception;
	/**
	 * The analyzeStatus method receives control each time a 
	 * partition ends.  It receives the batch and exit 
	 * status strings of the partition as inputs.
	 * @param batchStatus specifies the batch status of a partition.
	 * @param exitStatus specifies the exit status of a partition. 
	 * @throws Exception is thrown if an error occurs.
	 */
	public void analyzeStatus(BatchStatus batchStatus, String exitStatus) throws Exception;
}