| 1 | /* |
| 2 | * Copyright 2012-2013 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.configuration.support; |
| 17 | |
| 18 | import java.util.Collection; |
| 19 | import java.util.HashMap; |
| 20 | import java.util.Map; |
| 21 | import java.util.concurrent.ConcurrentHashMap; |
| 22 | import java.util.concurrent.ConcurrentMap; |
| 23 | |
| 24 | import org.springframework.batch.core.Step; |
| 25 | import org.springframework.batch.core.configuration.DuplicateJobException; |
| 26 | import org.springframework.batch.core.configuration.StepRegistry; |
| 27 | import org.springframework.batch.core.launch.NoSuchJobException; |
| 28 | import org.springframework.batch.core.step.NoSuchStepException; |
| 29 | import org.springframework.util.Assert; |
| 30 | |
| 31 | /** |
| 32 | * Simple map-based implementation of {@link StepRegistry}. Access to the map is |
| 33 | * synchronized, guarded by an internal lock. |
| 34 | * |
| 35 | * @author Sebastien Gerard |
| 36 | * @author Stephane Nicoll |
| 37 | */ |
| 38 | public class MapStepRegistry implements StepRegistry { |
| 39 | |
| 40 | private final ConcurrentMap<String, Map<String, Step>> map = new ConcurrentHashMap<String, Map<String, Step>>(); |
| 41 | |
| 42 | @Override |
| 43 | public void register(String jobName, Collection<Step> steps) throws DuplicateJobException { |
| 44 | Assert.notNull(jobName, "The job name cannot be null."); |
| 45 | Assert.notNull(steps, "The job steps cannot be null."); |
| 46 | |
| 47 | |
| 48 | final Map<String, Step> jobSteps = new HashMap<String, Step>(); |
| 49 | for (Step step : steps) { |
| 50 | jobSteps.put(step.getName(), step); |
| 51 | } |
| 52 | final Object previousValue = map.putIfAbsent(jobName, jobSteps); |
| 53 | if (previousValue != null) { |
| 54 | throw new DuplicateJobException("A job configuration with this name [" + jobName |
| 55 | + "] was already registered"); |
| 56 | } |
| 57 | } |
| 58 | |
| 59 | @Override |
| 60 | public void unregisterStepsFromJob(String jobName) { |
| 61 | Assert.notNull(jobName, "Job configuration must have a name."); |
| 62 | map.remove(jobName); |
| 63 | } |
| 64 | |
| 65 | @Override |
| 66 | public Step getStep(String jobName, String stepName) throws NoSuchJobException { |
| 67 | Assert.notNull(jobName, "The job name cannot be null."); |
| 68 | Assert.notNull(stepName, "The step name cannot be null."); |
| 69 | if (!map.containsKey(jobName)) { |
| 70 | throw new NoSuchJobException("No job configuration with the name [" + jobName + "] was registered"); |
| 71 | } else { |
| 72 | final Map<String, Step> jobSteps = map.get(jobName); |
| 73 | if (jobSteps.containsKey(stepName)) { |
| 74 | return jobSteps.get(stepName); |
| 75 | } else { |
| 76 | throw new NoSuchStepException("The step called [" + stepName + "] does not exist in the job [" + |
| 77 | jobName + "]"); |
| 78 | } |
| 79 | } |
| 80 | } |
| 81 | |
| 82 | } |