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17 package org.apache.logging.log4j.core.net;
18
19 import java.lang.reflect.InvocationTargetException;
20 import java.lang.reflect.Method;
21 import java.util.HashMap;
22 import java.util.Hashtable;
23 import java.util.Map;
24
25 import org.apache.logging.log4j.Logger;
26 import org.apache.logging.log4j.core.config.plugins.Plugin;
27 import org.apache.logging.log4j.core.util.Integers;
28 import org.apache.logging.log4j.core.util.Loader;
29 import org.apache.logging.log4j.status.StatusLogger;
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38 @Plugin(name = "multicastdns", category = "Core", elementType = "advertiser", printObject = false)
39 public class MulticastDnsAdvertiser implements Advertiser {
40 protected static final Logger LOGGER = StatusLogger.getLogger();
41 private static Object jmDNS = initializeJmDns();
42
43 private static Class<?> jmDNSClass;
44 private static Class<?> serviceInfoClass;
45
46 public MulticastDnsAdvertiser()
47 {
48
49 }
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63 @Override
64 public Object advertise(final Map<String, String> properties) {
65
66 final Map<String, String> truncatedProperties = new HashMap<String, String>();
67 for (final Map.Entry<String, String> entry:properties.entrySet())
68 {
69 if (entry.getKey().length() <= 255 && entry.getValue().length() <= 255)
70 {
71 truncatedProperties.put(entry.getKey(), entry.getValue());
72 }
73 }
74 final String protocol = truncatedProperties.get("protocol");
75 final String zone = "._log4j._"+(protocol != null ? protocol : "tcp") + ".local.";
76
77 final String portString = truncatedProperties.get("port");
78 final int port = Integers.parseInt(portString, 4555);
79
80 final String name = truncatedProperties.get("name");
81
82
83 if (jmDNS != null)
84 {
85 boolean isVersion3 = false;
86 try {
87
88 jmDNSClass.getMethod("create");
89 isVersion3 = true;
90 } catch (final NoSuchMethodException e) {
91
92 }
93 Object serviceInfo;
94 if (isVersion3) {
95 serviceInfo = buildServiceInfoVersion3(zone, port, name, truncatedProperties);
96 } else {
97 serviceInfo = buildServiceInfoVersion1(zone, port, name, truncatedProperties);
98 }
99
100 try {
101 final Method method = jmDNSClass.getMethod("registerService", serviceInfoClass);
102 method.invoke(jmDNS, serviceInfo);
103 } catch(final IllegalAccessException e) {
104 LOGGER.warn("Unable to invoke registerService method", e);
105 } catch(final NoSuchMethodException e) {
106 LOGGER.warn("No registerService method", e);
107 } catch(final InvocationTargetException e) {
108 LOGGER.warn("Unable to invoke registerService method", e);
109 }
110 return serviceInfo;
111 }
112 LOGGER.warn("JMDNS not available - will not advertise ZeroConf support");
113 return null;
114 }
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118
119
120 @Override
121 public void unadvertise(final Object serviceInfo) {
122 if (jmDNS != null) {
123 try {
124 final Method method = jmDNSClass.getMethod("unregisterService", serviceInfoClass);
125 method.invoke(jmDNS, serviceInfo);
126 } catch(final IllegalAccessException e) {
127 LOGGER.warn("Unable to invoke unregisterService method", e);
128 } catch(final NoSuchMethodException e) {
129 LOGGER.warn("No unregisterService method", e);
130 } catch(final InvocationTargetException e) {
131 LOGGER.warn("Unable to invoke unregisterService method", e);
132 }
133 }
134 }
135
136 private static Object createJmDnsVersion1()
137 {
138 try {
139 return jmDNSClass.getConstructor().newInstance();
140 } catch (final InstantiationException e) {
141 LOGGER.warn("Unable to instantiate JMDNS", e);
142 } catch (final IllegalAccessException e) {
143 LOGGER.warn("Unable to instantiate JMDNS", e);
144 } catch (final NoSuchMethodException e) {
145 LOGGER.warn("Unable to instantiate JMDNS", e);
146 } catch (final InvocationTargetException e) {
147 LOGGER.warn("Unable to instantiate JMDNS", e);
148 }
149 return null;
150 }
151
152 private static Object createJmDnsVersion3()
153 {
154 try {
155 final Method jmDNSCreateMethod = jmDNSClass.getMethod("create");
156 return jmDNSCreateMethod.invoke(null, (Object[])null);
157 } catch (final IllegalAccessException e) {
158 LOGGER.warn("Unable to invoke create method", e);
159 } catch (final NoSuchMethodException e) {
160 LOGGER.warn("Unable to get create method", e);
161 } catch (final InvocationTargetException e) {
162 LOGGER.warn("Unable to invoke create method", e);
163 }
164 return null;
165 }
166
167 private static Object buildServiceInfoVersion1(final String zone,
168 final int port,
169 final String name,
170 final Map<String, String> properties) {
171
172 @SuppressWarnings("UseOfObsoleteCollectionType")
173 final Hashtable<String, String> hashtableProperties = new Hashtable<String, String>(properties);
174 try {
175 return serviceInfoClass
176 .getConstructor(String.class, String.class, int.class, int.class, int.class, Hashtable.class)
177 .newInstance(zone, name, port, 0, 0, hashtableProperties);
178 } catch (final IllegalAccessException e) {
179 LOGGER.warn("Unable to construct ServiceInfo instance", e);
180 } catch (final NoSuchMethodException e) {
181 LOGGER.warn("Unable to get ServiceInfo constructor", e);
182 } catch (final InstantiationException e) {
183 LOGGER.warn("Unable to construct ServiceInfo instance", e);
184 } catch (final InvocationTargetException e) {
185 LOGGER.warn("Unable to construct ServiceInfo instance", e);
186 }
187 return null;
188 }
189
190 private static Object buildServiceInfoVersion3(final String zone,
191 final int port,
192 final String name,
193 final Map<String, String> properties) {
194 try {
195 return serviceInfoClass
196 .getMethod("create", String.class, String.class, int.class, int.class, int.class, Map.class)
197 .invoke(null, zone, name, port, 0, 0, properties);
198 } catch (final IllegalAccessException e) {
199 LOGGER.warn("Unable to invoke create method", e);
200 } catch (final NoSuchMethodException e) {
201 LOGGER.warn("Unable to find create method", e);
202 } catch (final InvocationTargetException e) {
203 LOGGER.warn("Unable to invoke create method", e);
204 }
205 return null;
206 }
207
208 private static Object initializeJmDns() {
209 try {
210 jmDNSClass = Loader.loadClass("javax.jmdns.JmDNS");
211 serviceInfoClass = Loader.loadClass("javax.jmdns.ServiceInfo");
212
213 boolean isVersion3 = false;
214 try {
215
216 jmDNSClass.getMethod("create");
217 isVersion3 = true;
218 } catch (final NoSuchMethodException e) {
219
220 }
221
222 if (isVersion3) {
223 return createJmDnsVersion3();
224 }
225 return createJmDnsVersion1();
226 } catch (final ClassNotFoundException e) {
227 LOGGER.warn("JmDNS or serviceInfo class not found", e);
228 } catch (final ExceptionInInitializerError e2) {
229 LOGGER.warn("JmDNS or serviceInfo class not found", e2);
230 }
231 return null;
232 }
233 }