001/* 002 * Copyright 2008-2009 the original author or authors. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * https://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.springframework.batch.core.partition.support; 017 018import java.util.Collection; 019 020import org.springframework.batch.core.StepExecution; 021 022/** 023 * Strategy for a aggregating step executions, usually when they are the result 024 * of partitioned or remote execution. 025 * 026 * @author Dave Syer 027 * 028 * @since 2.1 029 * 030 */ 031public interface StepExecutionAggregator { 032 033 /** 034 * Take the inputs and aggregate, putting the aggregates into the result. 035 * 036 * @param result the result to overwrite 037 * @param executions the inputs 038 */ 039 void aggregate(StepExecution result, Collection<StepExecution> executions); 040 041}