| 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.core.repository.dao; |
| 18 | |
| 19 | import java.io.Serializable; |
| 20 | import java.util.concurrent.ConcurrentMap; |
| 21 | |
| 22 | import org.springframework.batch.core.JobExecution; |
| 23 | import org.springframework.batch.core.StepExecution; |
| 24 | import org.springframework.batch.item.ExecutionContext; |
| 25 | import org.springframework.batch.support.SerializationUtils; |
| 26 | import org.springframework.batch.support.transaction.TransactionAwareProxyFactory; |
| 27 | |
| 28 | /** |
| 29 | * In-memory implementation of {@link ExecutionContextDao} backed by maps. |
| 30 | * |
| 31 | * @author Robert Kasanicky |
| 32 | * @author Dave Syer |
| 33 | */ |
| 34 | public class MapExecutionContextDao implements ExecutionContextDao { |
| 35 | |
| 36 | private final ConcurrentMap<ContextKey, ExecutionContext> contexts = TransactionAwareProxyFactory |
| 37 | .createAppendOnlyTransactionalMap(); |
| 38 | |
| 39 | private static final class ContextKey implements Comparable<ContextKey>, Serializable { |
| 40 | |
| 41 | private static enum Type { STEP, JOB; } |
| 42 | |
| 43 | private final Type type; |
| 44 | private final long id; |
| 45 | |
| 46 | private ContextKey(Type type, long id) { |
| 47 | if(type == null) throw new IllegalStateException("Need a non-null type for a context"); |
| 48 | this.type = type; |
| 49 | this.id = id; |
| 50 | } |
| 51 | |
| 52 | public int compareTo(ContextKey them) { |
| 53 | if(them == null) return 1; |
| 54 | final int idCompare = new Long(this.id).compareTo(new Long(them.id)); // JDK6 Make this Long.compare(x,y) |
| 55 | if(idCompare != 0) return idCompare; |
| 56 | final int typeCompare = this.type.compareTo(them.type); |
| 57 | if(typeCompare != 0) return typeCompare; |
| 58 | return 0; |
| 59 | } |
| 60 | |
| 61 | @Override |
| 62 | public boolean equals(Object them) { |
| 63 | if(them == null) return false; |
| 64 | if(them instanceof ContextKey) return this.equals((ContextKey)them); |
| 65 | return false; |
| 66 | } |
| 67 | |
| 68 | public boolean equals(ContextKey them) { |
| 69 | if(them == null) return false; |
| 70 | return this.id == them.id && this.type.equals(them.type); |
| 71 | } |
| 72 | |
| 73 | @Override |
| 74 | public int hashCode() { |
| 75 | int value = (int)(id^(id>>>32)); |
| 76 | switch(type) { |
| 77 | case STEP: return value; |
| 78 | case JOB: return ~value; |
| 79 | default: throw new IllegalStateException("Unknown type encountered in switch: " + type); |
| 80 | } |
| 81 | } |
| 82 | |
| 83 | public static ContextKey step(long id) { return new ContextKey(Type.STEP, id); } |
| 84 | |
| 85 | public static ContextKey job(long id) { return new ContextKey(Type.JOB, id); } |
| 86 | } |
| 87 | |
| 88 | public void clear() { |
| 89 | contexts.clear(); |
| 90 | } |
| 91 | |
| 92 | private static ExecutionContext copy(ExecutionContext original) { |
| 93 | return (ExecutionContext) SerializationUtils.deserialize(SerializationUtils.serialize(original)); |
| 94 | } |
| 95 | |
| 96 | public ExecutionContext getExecutionContext(StepExecution stepExecution) { |
| 97 | return copy(contexts.get(ContextKey.step(stepExecution.getId()))); |
| 98 | } |
| 99 | |
| 100 | public void updateExecutionContext(StepExecution stepExecution) { |
| 101 | ExecutionContext executionContext = stepExecution.getExecutionContext(); |
| 102 | if (executionContext != null) { |
| 103 | contexts.put(ContextKey.step(stepExecution.getId()), copy(executionContext)); |
| 104 | } |
| 105 | } |
| 106 | |
| 107 | public ExecutionContext getExecutionContext(JobExecution jobExecution) { |
| 108 | return copy(contexts.get(ContextKey.job(jobExecution.getId()))); |
| 109 | } |
| 110 | |
| 111 | public void updateExecutionContext(JobExecution jobExecution) { |
| 112 | ExecutionContext executionContext = jobExecution.getExecutionContext(); |
| 113 | if (executionContext != null) { |
| 114 | contexts.put(ContextKey.job(jobExecution.getId()), copy(executionContext)); |
| 115 | } |
| 116 | } |
| 117 | |
| 118 | public void saveExecutionContext(JobExecution jobExecution) { |
| 119 | updateExecutionContext(jobExecution); |
| 120 | } |
| 121 | |
| 122 | public void saveExecutionContext(StepExecution stepExecution) { |
| 123 | updateExecutionContext(stepExecution); |
| 124 | } |
| 125 | |
| 126 | } |