001/* 002 * Copyright 2006-2010 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 */ 016 017package org.springframework.batch.integration.chunk; 018 019import java.util.Collection; 020 021import org.springframework.batch.core.StepContribution; 022import org.springframework.batch.core.StepExecution; 023 024/** 025 * A source of {@link StepContribution} instances that can be aggregated and used to update an ongoing 026 * {@link StepExecution}. 027 * 028 * @author Dave Syer 029 * 030 */ 031public interface StepContributionSource { 032 033 /** 034 * Get the currently available contributions and drain the source. The next call would return an empty collection, 035 * unless new contributions have arrived. 036 * 037 * @return a collection of {@link StepContribution} instances 038 */ 039 Collection<StepContribution> getStepContributions(); 040 041}