1 /***
2 * Copyright 2003-2010 Terracotta, Inc.
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 net.sf.ehcache.config;
17
18 import net.sf.ehcache.Element;
19 import net.sf.ehcache.store.compound.CopyStrategy;
20 import net.sf.ehcache.store.compound.LegacyCopyStrategyAdapter;
21 import net.sf.ehcache.store.compound.ReadWriteCopyStrategy;
22 import net.sf.ehcache.util.ClassLoaderUtil;
23
24 /***
25 * @author Alex Snaps
26 */
27 public class CopyStrategyConfiguration {
28
29 private volatile String className = "net.sf.ehcache.store.compound.ReadWriteSerializationCopyStrategy";
30 private ReadWriteCopyStrategy<Element> strategy;
31
32 /***
33 * Returns the fully qualified class name for the CopyStrategy to use
34 *
35 * @return FQCN to the CopyStrategy implementation to use
36 */
37 public String getClassName() {
38 return className;
39 }
40
41 /***
42 * Sets the fully qualified class name for the CopyStrategy to use
43 *
44 * @param className
45 * FQCN
46 */
47 public void setClass(final String className) {
48 this.className = className;
49 }
50
51 /***
52 * Sets the CopyStrategy instance to use
53 *
54 * @param copyStrategy the copy strategy
55 */
56 public synchronized void setCopyStrategyInstance(ReadWriteCopyStrategy<Element> copyStrategy) {
57 this.strategy = copyStrategy;
58 }
59
60 /***
61 * Get (and potentially) instantiate the instance
62 *
63 * @return the instance
64 */
65 public synchronized ReadWriteCopyStrategy<Element> getCopyStrategyInstance() {
66 if (strategy == null) {
67 Class copyStrategy = null;
68 try {
69 copyStrategy = ClassLoaderUtil.loadClass(className);
70 Object strategyObject = copyStrategy.newInstance();
71 if (strategyObject instanceof CopyStrategy) {
72 strategy = new LegacyCopyStrategyAdapter((CopyStrategy) strategyObject);
73 } else {
74 strategy = (ReadWriteCopyStrategy<Element>) strategyObject;
75 }
76 } catch (ClassNotFoundException e) {
77 throw new RuntimeException("Couldn't find the CopyStrategy class!", e);
78 } catch (InstantiationException e) {
79 throw new RuntimeException("Couldn't instantiate the CopyStrategy instance!", e);
80 } catch (IllegalAccessException e) {
81 throw new RuntimeException("Couldn't instantiate the CopyStrategy instance!", e);
82 } catch (ClassCastException e) {
83 throw new RuntimeException(copyStrategy != null ? copyStrategy.getSimpleName()
84 + " doesn't implement net.sf.ehcache.store.compound.CopyStrategy" : "Error with CopyStrategy", e);
85 }
86 }
87 return strategy;
88 }
89
90 /***
91 * Make copy of this configuration
92 * @return a copy of this configuration
93 */
94 protected CopyStrategyConfiguration copy() {
95 CopyStrategyConfiguration clone = new CopyStrategyConfiguration();
96 clone.setClass(getClassName());
97 return clone;
98 }
99
100 /***
101 * {@inheritDoc}
102 */
103 @Override
104 public int hashCode() {
105 final int prime = 31;
106 int result = 1;
107 result = prime * result + ((className == null) ? 0 : className.hashCode());
108 return result;
109 }
110
111 /***
112 * {@inheritDoc}
113 */
114 @Override
115 public boolean equals(Object obj) {
116 if (this == obj) {
117 return true;
118 }
119 if (obj == null) {
120 return false;
121 }
122 if (getClass() != obj.getClass()) {
123 return false;
124 }
125 CopyStrategyConfiguration other = (CopyStrategyConfiguration) obj;
126 if (className == null) {
127 if (other.className != null) {
128 return false;
129 }
130 } else if (!className.equals(other.className)) {
131 return false;
132 }
133 return true;
134 }
135
136 }