1 /*
2 * Copyright 2006-2010 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
17 package org.springframework.batch.integration.chunk;
18
19 import java.util.Collection;
20
21 import org.springframework.batch.core.StepContribution;
22 import org.springframework.batch.core.StepExecution;
23
24 /**
25 * A source of {@link StepContribution} instances that can be aggregated and used to update an ongoing
26 * {@link StepExecution}.
27 *
28 * @author Dave Syer
29 *
30 */
31 public interface StepContributionSource {
32
33 /**
34 * Get the currently available contributions and drain the source. The next call would return an empty collection,
35 * unless new contributions have arrived.
36 *
37 * @return a collection of {@link StepContribution} instances
38 */
39 Collection<StepContribution> getStepContributions();
40
41 }