NamingServiceImpl.java Source File (original) (raw)

00001 00002 00003 00004 00005 00006 00007 00008 00009 00010 00011 00012 00013 00014 00015 00016 00017 00018 00019 00020 00021 00022 00023 00024 00025 00026 00027 00028 00029 00030 00031 00032 00033 00034 00035 package org.hebe.mps; 00036 00037 import org.hebe.mps.naming.Binding; 00038 import org.hebe.mps.naming.NamingServiceServer; 00039 import java.util.Hashtable; 00040 import java.util.Enumeration; 00041 import java.net.*; 00042 00043 00044 00045 00046 00047 00048 00049 00050 00051 00052 00053 00054 public class NamingServiceImpl implements org.hebe.mps.naming.NamingService { 00055 00056 00057 00058 public static void main(String [] args) { 00059 if (args.length > 2 || (args.length > 0 && args[0].equals("-h"))) { 00060 usage(); 00061 return; 00062 } 00063 00064 int portNumber = 9091; 00065 InetAddress hostname = null; 00066 00067 if (args.length > 0) { 00068 try { 00069 portNumber = Integer.parseInt(args[0]); 00070 } catch (NumberFormatException nfe) { 00071 System.out.println("Invalid port number."); 00072 usage(); 00073 return; 00074 } 00075 } 00076 00077 if (args.length > 1) { 00078 try { 00079 hostname = InetAddress.getByName(args[1]); 00080 } catch (UnknownHostException uhe) { 00081 System.out.println("Unknown host "" + args[1] + """); 00082 return; 00083 } 00084 } 00085 00086 try { 00087 NamingServiceImpl impl = new NamingServiceImpl(); 00088 NamingServiceServer svr = 00089 new NamingServiceServer("NamingService", hostname, portNumber, impl); 00090 impl.bind("NamingService", svr.getBoundName(), true); 00091 } catch (Exception e) { 00092 e.printStackTrace(); 00093 } 00094 } 00095 00096 00097 00098 00099 public static void usage() { 00100 System.out.println("Usage: org.hebe.mps.NamingServiceImpl [] []"); 00101 System.out.println(" defaults to 9091"); 00102 System.out.println(" defaults to INADDR_ANY"); 00103 } 00104 00105 00106 00107 00108 00109 00110 00111 private Hashtable names = new Hashtable(); 00112 00113 public NamingServiceImpl() { 00114 } 00115 00116 00117 00118 00119 00120 00121 00122 public String resolve(String name) { 00123 if (name.startsWith("mps:")) 00124 return name; 00125 00126 if (names.containsKey(name)) { 00127 String result = (String) names.get(name); 00128 if (result != null) 00129 return result; 00130 } 00131 00132 return ""; 00133 } 00134 00135 00136 00137 00138 00139 00140 00141 00142 00143 public boolean bind(String name, String cname, boolean replace) { 00144 if (name.startsWith("mps:")) 00145 return true; 00146 00147 if (names.containsKey(name) && !replace) 00148 return false; 00149 00150 System.out.println("Binding "" + name + "" to "" + cname + """); 00151 names.put(name, cname); 00152 return true; 00153 } 00154 00155 00156 00157 00158 00159 00160 00161 public boolean unbind(String name) { 00162 if (names.containsKey(name) && 00163 names.get(name) != null) { 00164 names.put(name, null); 00165 return true; 00166 } 00167 00168 return false; 00169 } 00170 00171 00172 00173 00174 00175 00176 00177 public Binding[] enumerate() { 00178 Binding[] results = new Binding[names.size()]; 00179 int i = 0; 00180 00181 for (Enumeration e = names.keys(); 00182 e.hasMoreElements(); 00183 i++) { 00184 String name = (String) e.nextElement(); 00185 String cname = (String) names.get(name); 00186 results[i] = new Binding(name, cname); 00187 } 00188 return results; 00189 } 00190 }