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17 package org.apache.logging.log4j.core.selector;
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19 import java.net.URI;
20 import java.util.ArrayList;
21 import java.util.Collections;
22 import java.util.List;
23 import java.util.Map;
24 import java.util.concurrent.ConcurrentHashMap;
25 import java.util.concurrent.ConcurrentMap;
26 import javax.naming.NamingException;
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28 import org.apache.logging.log4j.core.LoggerContext;
29 import org.apache.logging.log4j.core.impl.ContextAnchor;
30 import org.apache.logging.log4j.core.net.JndiManager;
31 import org.apache.logging.log4j.core.util.Constants;
32 import org.apache.logging.log4j.status.StatusLogger;
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86 public class JndiContextSelector implements NamedContextSelector {
87
88 private static final LoggerContext CONTEXT = new LoggerContext("Default");
89
90 private static final ConcurrentMap<String, LoggerContext> CONTEXT_MAP =
91 new ConcurrentHashMap<>();
92
93 private static final StatusLogger LOGGER = StatusLogger.getLogger();
94
95 public JndiContextSelector() {
96 if (!JndiManager.isJndiContextSelectorEnabled()) {
97 throw new IllegalStateException("JNDI must be enabled by setting log4j2.enableJndiContextSelector=true");
98 }
99 }
100
101 @Override
102 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext) {
103 return getContext(fqcn, loader, currentContext, null);
104 }
105
106 @Override
107 public LoggerContext getContext(final String fqcn, final ClassLoader loader, final boolean currentContext,
108 final URI configLocation) {
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110 final LoggerContext lc = ContextAnchor.THREAD_CONTEXT.get();
111 if (lc != null) {
112 return lc;
113 }
114
115 String loggingContextName = null;
116
117 try (final JndiManager jndiManager = JndiManager.getDefaultManager()) {
118 loggingContextName = jndiManager.lookup(Constants.JNDI_CONTEXT_NAME);
119 } catch (final NamingException ne) {
120 LOGGER.error("Unable to lookup {}", Constants.JNDI_CONTEXT_NAME, ne);
121 }
122
123 return loggingContextName == null ? CONTEXT : locateContext(loggingContextName, null, configLocation);
124 }
125
126 @Override
127 public LoggerContext locateContext(final String name, final Object externalContext, final URI configLocation) {
128 if (name == null) {
129 LOGGER.error("A context name is required to locate a LoggerContext");
130 return null;
131 }
132 if (!CONTEXT_MAP.containsKey(name)) {
133 final LoggerContext ctx = new LoggerContext(name, externalContext, configLocation);
134 CONTEXT_MAP.putIfAbsent(name, ctx);
135 }
136 return CONTEXT_MAP.get(name);
137 }
138
139 @Override
140 public void removeContext(final LoggerContext context) {
141
142 for (final Map.Entry<String, LoggerContext> entry : CONTEXT_MAP.entrySet()) {
143 if (entry.getValue().equals(context)) {
144 CONTEXT_MAP.remove(entry.getKey());
145 }
146 }
147 }
148
149 @Override
150 public LoggerContext removeContext(final String name) {
151 return CONTEXT_MAP.remove(name);
152 }
153
154 @Override
155 public List<LoggerContext> getLoggerContexts() {
156 return Collections.unmodifiableList(new ArrayList<>(CONTEXT_MAP.values()));
157 }
158
159 }