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1   /*
2    * Copyright 2006-2007 the original author or authors.
3    *
4    * Licensed under the Apache License, Version 2.0 (the "License");
5    * you may not use this file except in compliance with the License.
6    * You may obtain a copy of the License at
7    *
8    *      http://www.apache.org/licenses/LICENSE-2.0
9    *
10   * Unless required by applicable law or agreed to in writing, software
11   * distributed under the License is distributed on an "AS IS" BASIS,
12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13   * See the License for the specific language governing permissions and
14   * limitations under the License.
15   */
16  package org.springframework.batch.core.job.flow.support.state;
17  
18  import java.util.Collection;
19  
20  import org.springframework.batch.core.job.flow.FlowExecution;
21  import org.springframework.batch.core.job.flow.FlowExecutionStatus;
22  
23  /**
24   * Strategy interface for aggregating {@link FlowExecution} instances into a
25   * single exit status.
26   * 
27   * @author Dave Syer
28   * @since 2.0
29   */
30  public interface FlowExecutionAggregator {
31  
32  	/**
33  	 * @param executions the executions to aggregate
34  	 * @return a summary status for the whole lot
35  	 */
36  	FlowExecutionStatus aggregate(Collection<FlowExecution> executions);
37  
38  }