| 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.listener; |
| 17 | |
| 18 | import java.util.Arrays; |
| 19 | import java.util.Iterator; |
| 20 | |
| 21 | import org.springframework.batch.core.ExitStatus; |
| 22 | import org.springframework.batch.core.StepExecution; |
| 23 | import org.springframework.batch.core.StepExecutionListener; |
| 24 | import org.springframework.core.Ordered; |
| 25 | |
| 26 | /** |
| 27 | * @author Lucas Ward |
| 28 | * @author Dave Syer |
| 29 | * |
| 30 | */ |
| 31 | public class CompositeStepExecutionListener implements StepExecutionListener { |
| 32 | |
| 33 | private OrderedComposite<StepExecutionListener> list = new OrderedComposite<StepExecutionListener>(); |
| 34 | |
| 35 | /** |
| 36 | * Public setter for the listeners. |
| 37 | * |
| 38 | * @param listeners |
| 39 | */ |
| 40 | public void setListeners(StepExecutionListener[] listeners) { |
| 41 | list.setItems(Arrays.asList(listeners)); |
| 42 | } |
| 43 | |
| 44 | /** |
| 45 | * Register additional listener. |
| 46 | * |
| 47 | * @param stepExecutionListener |
| 48 | */ |
| 49 | public void register(StepExecutionListener stepExecutionListener) { |
| 50 | list.add(stepExecutionListener); |
| 51 | } |
| 52 | |
| 53 | /** |
| 54 | * Call the registered listeners in reverse order, respecting and |
| 55 | * prioritising those that implement {@link Ordered}. |
| 56 | * @see org.springframework.batch.core.StepExecutionListener#afterStep(StepExecution) |
| 57 | */ |
| 58 | public ExitStatus afterStep(StepExecution stepExecution) { |
| 59 | ExitStatus status = null; |
| 60 | for (Iterator<StepExecutionListener> iterator = list.reverse(); iterator.hasNext();) { |
| 61 | StepExecutionListener listener = (StepExecutionListener) iterator.next(); |
| 62 | ExitStatus close = listener.afterStep(stepExecution); |
| 63 | status = status != null ? status.and(close) : close; |
| 64 | } |
| 65 | return status; |
| 66 | } |
| 67 | |
| 68 | /** |
| 69 | * Call the registered listeners in order, respecting and prioritising those |
| 70 | * that implement {@link Ordered}. |
| 71 | * @see org.springframework.batch.core.StepExecutionListener#beforeStep(StepExecution) |
| 72 | */ |
| 73 | public void beforeStep(StepExecution stepExecution) { |
| 74 | for (Iterator<StepExecutionListener> iterator = list.iterator(); iterator.hasNext();) { |
| 75 | StepExecutionListener listener = (StepExecutionListener) iterator.next(); |
| 76 | listener.beforeStep(stepExecution); |
| 77 | } |
| 78 | } |
| 79 | |
| 80 | } |