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
17 package org.springframework.batch.repeat.support;
18
19 import org.springframework.batch.repeat.RepeatStatus;
20 import org.springframework.batch.repeat.RepeatContext;
21
22 /**
23 * Interface for result holder.
24 *
25 * @author Dave Syer
26 */
27 interface ResultHolder {
28 /**
29 * Get the result for client from this holder. Does not block if none is
30 * available yet.
31 *
32 * @return the result, or null if there is none.
33 * @throws IllegalStateException
34 */
35 RepeatStatus getResult();
36
37 /**
38 * Get the error for client from this holder if any. Does not block if
39 * none is available yet.
40 *
41 * @return the error, or null if there is none.
42 * @throws IllegalStateException
43 */
44 Throwable getError();
45
46 /**
47 * Get the context in which the result evaluation is executing.
48 *
49 * @return the context of the result evaluation.
50 */
51 RepeatContext getContext();
52 }