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17 package org.apache.logging.log4j.core.lookup;
18
19 import javax.naming.NamingException;
20
21 import org.apache.logging.log4j.Logger;
22 import org.apache.logging.log4j.Marker;
23 import org.apache.logging.log4j.MarkerManager;
24 import org.apache.logging.log4j.core.LogEvent;
25 import org.apache.logging.log4j.core.config.plugins.Plugin;
26 import org.apache.logging.log4j.core.net.JndiManager;
27 import org.apache.logging.log4j.status.StatusLogger;
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32 @Plugin(name = "jndi", category = StrLookup.CATEGORY)
33 public class JndiLookup extends AbstractLookup {
34
35 private static final Logger LOGGER = StatusLogger.getLogger();
36 private static final Marker LOOKUP = MarkerManager.getMarker("LOOKUP");
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39 static final String CONTAINER_JNDI_RESOURCE_PATH_PREFIX = "java:comp/env/";
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44 public JndiLookup() {
45 if (!JndiManager.isJndiLookupEnabled()) {
46 throw new IllegalStateException("JNDI must be enabled by setting log4j2.enableJndiLookup=true");
47 }
48 }
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56 @Override
57 public String lookup(final LogEvent event, final String key) {
58 if (key == null) {
59 return null;
60 }
61 final String jndiName = convertJndiName(key);
62 final JndiManager jndiManager = JndiManager.getDefaultManager();
63 try {
64 return jndiManager.lookup(jndiName);
65 } catch (final NamingException e) {
66 LOGGER.warn(LOOKUP, "Error looking up JNDI resource [{}].", jndiName, e);
67 return null;
68 } finally {
69 jndiManager.release();
70 }
71 }
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80 private String convertJndiName(final String jndiName) {
81 if (!jndiName.startsWith(CONTAINER_JNDI_RESOURCE_PATH_PREFIX) && jndiName.indexOf(':') == -1) {
82 return CONTAINER_JNDI_RESOURCE_PATH_PREFIX + jndiName;
83 }
84 return jndiName;
85 }
86 }