| 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.step; |
| 17 | |
| 18 | import org.springframework.batch.core.StepExecution; |
| 19 | |
| 20 | import edu.emory.mathcs.backport.java.util.concurrent.Semaphore; |
| 21 | |
| 22 | /** |
| 23 | * An implementation of the {@link StepExecutionSynchronizer} that uses Backport Concurrent Utilities. |
| 24 | * |
| 25 | * @author Dave Syer |
| 26 | * @author Ben Hale |
| 27 | */ |
| 28 | class BackportConcurrentStepExecutionSynchronizer implements StepExecutionSynchronizer { |
| 29 | |
| 30 | private Semaphore semaphore = new Semaphore(1); |
| 31 | |
| 32 | public void lock(StepExecution stepExecution) throws InterruptedException { |
| 33 | semaphore.acquire(); |
| 34 | } |
| 35 | |
| 36 | public void release(StepExecution stepExecution) { |
| 37 | semaphore.release(); |
| 38 | } |
| 39 | |
| 40 | } |