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1
7 package org.jboss.cache.config;
8
9 import org.apache.commons.logging.Log;
10 import org.apache.commons.logging.LogFactory;
11 import org.jboss.cache.CacheImpl;
12
13 import java.io.Serializable  ;
14 import java.util.Collection ;
15 import java.util.Collections ;
16 import java.util.HashSet ;
17 import java.util.Set ;
18
19
27 public class ConfigurationComponent implements Serializable , Cloneable
28 {
29 private static final long serialVersionUID = 4879873994727821938L;
30
31 protected Log log = LogFactory.getLog(getClass());
32 private CacheImpl cache; private Set <ConfigurationComponent> children =
34 Collections.synchronizedSet(new HashSet <ConfigurationComponent>());
35
36 protected ConfigurationComponent()
37 {
38 }
39
40 public void passCacheToChildConfig(ConfigurationComponent child)
41 {
42 if (child != null)
43 {
44 child.setCacheImpl(cache);
45 }
46 }
47
48 protected void addChildConfig(ConfigurationComponent child)
49 {
50 if (child != null && children.add(child))
51 child.setCacheImpl(cache);
52 }
53
54 protected void addChildConfigs(Collection <? extends ConfigurationComponent> toAdd)
55 {
56 if (toAdd != null)
57 {
58 for (ConfigurationComponent child : toAdd)
59 addChildConfig(child);
60 }
61 }
62
63 protected void removeChildConfig(ConfigurationComponent child)
64 {
65 children.remove(child);
66 }
67
68 protected void removeChildConfigs(Collection <? extends ConfigurationComponent> toRemove)
69 {
70 if (toRemove != null)
71 {
72 for (ConfigurationComponent child : toRemove)
73 removeChildConfig(child);
74 }
75 }
76
77 protected void replaceChildConfig(ConfigurationComponent oldConfig, ConfigurationComponent newConfig)
78 {
79 removeChildConfig(oldConfig);
80 addChildConfig(newConfig);
81 }
82
83 protected void replaceChildConfigs(Collection <? extends ConfigurationComponent> oldConfigs,
84 Collection <? extends ConfigurationComponent> newConfigs)
85 {
86 synchronized (children)
87 {
88 removeChildConfigs(oldConfigs);
89 addChildConfigs(newConfigs);
90 }
91 }
92
93
98 protected void testImmutability(String fieldName)
99 {
100 try
101 {
102 if (cache != null && cache.started && !getClass().getDeclaredField(fieldName).isAnnotationPresent(Dynamic.class))
103 {
104 throw new ConfigurationException("Attempted to modify a non-Dynamic configuration element [" + fieldName + "] after the cache has started!");
105 }
106 }
107 catch (NoSuchFieldException e)
108 {
109 log.warn("Field " + fieldName + " not found!!");
110 }
111 }
112
113 protected CacheImpl getTreeCache()
114 {
115 return cache;
116 }
117
118
123 public void setCacheImpl(CacheImpl cache)
124 {
125 this.cache = cache;
126 synchronized (children)
127 {
128 for (ConfigurationComponent child : children)
129 {
130 child.setCacheImpl(cache);
131 }
132 }
133 }
134
135 public ConfigurationComponent clone() throws CloneNotSupportedException
136 {
137 ConfigurationComponent c = (ConfigurationComponent) super.clone();
138 c.setCacheImpl(null);
139 return c;
140 }
141
142
147 protected static boolean safeEquals(Object a, Object b)
148 {
149 return (a == b) || (a != null && a.equals(b));
150 }
151 }
152 |
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