+++ /dev/null
-/*
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership.
- * The ASF licenses this file to You under the Apache License, Version 2.0
- * (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-package org.apache.log4j.net;
-
-import java.lang.reflect.Constructor;
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.util.HashMap;
-import java.util.Hashtable;
-import java.util.Map;
-
-import org.apache.log4j.helpers.LogLog;
-
-public class ZeroConfSupport {
- private static Object jmDNS = initializeJMDNS();
-
- Object serviceInfo;
- private static Class jmDNSClass;
- private static Class serviceInfoClass;
-
- public ZeroConfSupport(String zone, int port, String name, Map properties) {
- //if version 3 is available, use it to constuct a serviceInfo instance, otherwise support the version1 API
- boolean isVersion3 = false;
- try {
- //create method is in version 3, not version 1
- jmDNSClass.getMethod("create", null);
- isVersion3 = true;
- } catch (NoSuchMethodException e) {
- //no-op
- }
-
- if (isVersion3) {
- LogLog.debug("using JmDNS version 3 to construct serviceInfo instance");
- serviceInfo = buildServiceInfoVersion3(zone, port, name, properties);
- } else {
- LogLog.debug("using JmDNS version 1.0 to construct serviceInfo instance");
- serviceInfo = buildServiceInfoVersion1(zone, port, name, properties);
- }
- }
-
- public ZeroConfSupport(String zone, int port, String name) {
- this(zone, port, name, new HashMap());
- }
-
- private static Object createJmDNSVersion1()
- {
- try {
- return jmDNSClass.newInstance();
- } catch (InstantiationException e) {
- LogLog.warn("Unable to instantiate JMDNS", e);
- } catch (IllegalAccessException e) {
- LogLog.warn("Unable to instantiate JMDNS", e);
- }
- return null;
- }
-
- private static Object createJmDNSVersion3()
- {
- try {
- Method jmDNSCreateMethod = jmDNSClass.getMethod("create", null);
- return jmDNSCreateMethod.invoke(null, null);
- } catch (IllegalAccessException e) {
- LogLog.warn("Unable to instantiate jmdns class", e);
- } catch (NoSuchMethodException e) {
- LogLog.warn("Unable to access constructor", e);
- } catch (InvocationTargetException e) {
- LogLog.warn("Unable to call constructor", e);
- }
- return null;
- }
-
- private Object buildServiceInfoVersion1(String zone, int port, String name, Map properties) {
- //version 1 uses a hashtable
- Hashtable hashtableProperties = new Hashtable(properties);
- try {
- Class[] args = new Class[6];
- args[0] = String.class;
- args[1] = String.class;
- args[2] = int.class;
- args[3] = int.class; //weight (0)
- args[4] = int.class; //priority (0)
- args[5] = Hashtable.class;
- Constructor constructor = serviceInfoClass.getConstructor(args);
- Object[] values = new Object[6];
- values[0] = zone;
- values[1] = name;
- values[2] = new Integer(port);
- values[3] = new Integer(0);
- values[4] = new Integer(0);
- values[5] = hashtableProperties;
- Object result = constructor.newInstance(values);
- LogLog.debug("created serviceinfo: " + result);
- return result;
- } catch (IllegalAccessException e) {
- LogLog.warn("Unable to construct ServiceInfo instance", e);
- } catch (NoSuchMethodException e) {
- LogLog.warn("Unable to get ServiceInfo constructor", e);
- } catch (InstantiationException e) {
- LogLog.warn("Unable to construct ServiceInfo instance", e);
- } catch (InvocationTargetException e) {
- LogLog.warn("Unable to construct ServiceInfo instance", e);
- }
- return null;
- }
-
- private Object buildServiceInfoVersion3(String zone, int port, String name, Map properties) {
- try {
- Class[] args = new Class[6];
- args[0] = String.class; //zone/type
- args[1] = String.class; //display name
- args[2] = int.class; //port
- args[3] = int.class; //weight (0)
- args[4] = int.class; //priority (0)
- args[5] = Map.class;
- Method serviceInfoCreateMethod = serviceInfoClass.getMethod("create", args);
- Object[] values = new Object[6];
- values[0] = zone;
- values[1] = name;
- values[2] = new Integer(port);
- values[3] = new Integer(0);
- values[4] = new Integer(0);
- values[5] = properties;
- Object result = serviceInfoCreateMethod.invoke(null, values);
- LogLog.debug("created serviceinfo: " + result);
- return result;
- } catch (IllegalAccessException e) {
- LogLog.warn("Unable to invoke create method", e);
- } catch (NoSuchMethodException e) {
- LogLog.warn("Unable to find create method", e);
- } catch (InvocationTargetException e) {
- LogLog.warn("Unable to invoke create method", e);
- }
- return null;
- }
-
- public void advertise() {
- try {
- Method method = jmDNSClass.getMethod("registerService", new Class[]{serviceInfoClass});
- method.invoke(jmDNS, new Object[]{serviceInfo});
- LogLog.debug("registered serviceInfo: " + serviceInfo);
- } catch(IllegalAccessException e) {
- LogLog.warn("Unable to invoke registerService method", e);
- } catch(NoSuchMethodException e) {
- LogLog.warn("No registerService method", e);
- } catch(InvocationTargetException e) {
- LogLog.warn("Unable to invoke registerService method", e);
- }
- }
-
- public void unadvertise() {
- try {
- Method method = jmDNSClass.getMethod("unregisterService", new Class[]{serviceInfoClass});
- method.invoke(jmDNS, new Object[]{serviceInfo});
- LogLog.debug("unregistered serviceInfo: " + serviceInfo);
- } catch(IllegalAccessException e) {
- LogLog.warn("Unable to invoke unregisterService method", e);
- } catch(NoSuchMethodException e) {
- LogLog.warn("No unregisterService method", e);
- } catch(InvocationTargetException e) {
- LogLog.warn("Unable to invoke unregisterService method", e);
- }
- }
-
- private static Object initializeJMDNS() {
- try {
- jmDNSClass = Class.forName("javax.jmdns.JmDNS");
- serviceInfoClass = Class.forName("javax.jmdns.ServiceInfo");
- } catch (ClassNotFoundException e) {
- LogLog.warn("JmDNS or serviceInfo class not found", e);
- }
-
- //if version 3 is available, use it to constuct a serviceInfo instance, otherwise support the version1 API
- boolean isVersion3 = false;
- try {
- //create method is in version 3, not version 1
- jmDNSClass.getMethod("create", null);
- isVersion3 = true;
- } catch (NoSuchMethodException e) {
- //no-op
- }
-
- if (isVersion3) {
- return createJmDNSVersion3();
- } else {
- return createJmDNSVersion1();
- }
- }
-
- public static Object getJMDNSInstance() {
- return jmDNS;
- }
-}
git://source.jalview.org / jalview.git / blobdiff