001: /*
002: License $Id: MetaClient.java,v 1.5 2005/03/15 20:09:44 hendriks73 Exp $
003:
004: Copyright (c) 2001-2005 tagtraum industries.
005:
006: LGPL
007: ====
008:
009: jo! is free software; you can redistribute it and/or
010: modify it under the terms of the GNU Lesser General Public
011: License as published by the Free Software Foundation; either
012: version 2.1 of the License, or (at your option) any later version.
013:
014: jo! is distributed in the hope that it will be useful,
015: but WITHOUT ANY WARRANTY; without even the implied warranty of
016: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
017: Lesser General Public License for more details.
018:
019: You should have received a copy of the GNU Lesser General Public
020: License along with this library; if not, write to the Free Software
021: Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
022:
023: For LGPL see <http://www.fsf.org/copyleft/lesser.txt>
024:
025:
026: Sun license
027: ===========
028:
029: This release contains software by Sun Microsystems. Therefore
030: the following conditions have to be met, too. They apply to the
031: files
032:
033: - lib/mail.jar
034: - lib/activation.jar
035: - lib/jsse.jar
036: - lib/jcert.jar
037: - lib/jaxp.jar
038: - lib/crimson.jar
039: - lib/servlet.jar
040: - lib/jnet.jar
041: - lib/jaas.jar
042: - lib/jaasmod.jar
043:
044: contained in this release.
045:
046: a. Licensee may not modify the Java Platform
047: Interface (JPI, identified as classes contained within the javax
048: package or any subpackages of the javax package), by creating additional
049: classes within the JPI or otherwise causing the addition to or modification
050: of the classes in the JPI. In the event that Licensee creates any
051: Java-related API and distribute such API to others for applet or
052: application development, you must promptly publish broadly, an accurate
053: specification for such API for free use by all developers of Java-based
054: software.
055:
056: b. Software is confidential copyrighted information of Sun and
057: title to all copies is retained by Sun and/or its licensors. Licensee
058: shall not modify, decompile, disassemble, decrypt, extract, or otherwise
059: reverse engineer Software. Software may not be leased, assigned, or
060: sublicensed, in whole or in part. Software is not designed or intended
061: for use in on-line control of aircraft, air traffic, aircraft navigation
062: or aircraft communications; or in the design, construction, operation or
063: maintenance of any nuclear facility. Licensee warrants that it will not
064: use or redistribute the Software for such purposes.
065:
066: c. Software is provided "AS IS," without a warranty
067: of any kind. ALL EXPRESS OR IMPLIED REPRESENTATIONS AND WARRANTIES,
068: INCLUDING ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A
069: PARTICULAR PURPOSE OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED.
070:
071: d. This License is effective until terminated. Licensee may
072: terminate this License at any time by destroying all copies of Software.
073: This License will terminate immediately without notice from Sun if Licensee
074: fails to comply with any provision of this License. Upon such termination,
075: Licensee must destroy all copies of Software.
076:
077: e. Software, including technical data, is subject to U.S.
078: export control laws, including the U.S. Export Administration Act and its
079: associated regulations, and may be subject to export or import regulations
080: in other countries. Licensee agrees to comply strictly with all such
081: regulations and acknowledges that it has the responsibility to obtain
082: licenses to export, re-export, or import Software. Software may not be
083: downloaded, or otherwise exported or re-exported (i) into, or to a national
084: or resident of, Cuba, Iraq, Iran, North Korea, Libya, Sudan, Syria or any
085: country to which the U.S. has embargoed goods; or (ii) to anyone on the
086: U.S. Treasury Department's list of Specially Designated Nations or the U.S.
087: Commerce Department's Table of Denial Orders.
088:
089:
090: Feedback
091: ========
092:
093: We encourage your feedback and suggestions and want to use your feedback to
094: improve the Software. Send all such feedback to:
095: <feedback@tagtraum.com>
096:
097: For more information on tagtraum industries and jo!
098: please see <http://www.tagtraum.com/>.
099:
100:
101: */
102: package com.tagtraum.metaserver;
103:
104: import java.io.*;
105: import java.net.InetAddress;
106: import java.net.Socket;
107:
108: /**
109: * Realisiert einen sehr simplen Admin-Client. Über ihn
110: * läßt sich der {@link MetaServer} ansprechen. Um ihn zu
111: * starten genügt folgender Aufruf:
112: * <xmp>
113: * java -cp <classpath> com.tagtraum.framework.server.AdminClient <hostname> <port>
114: * </xmp>
115: * Üblicherweise horcht {@link MetaServer} auf Port 9090.
116: * Ein Verbinden ist nur erlaubt, wenn die IP-Adresse, von der
117: * aus der AdminClient gestartet wurde, in der Liste der
118: * priviligierten IP-Addressen des {@link MetaServer}s aufgeführt
119: * ist.<p>
120: * Statt diesem Client kann auch das Programm Telnet benutzt werden:
121: * <xmp>
122: * telnet <hostname> <port>
123: * </xmp>
124: *
125: * @author Hendrik Schreiber
126: * @version 1.1beta1 $Id: MetaClient.java,v 1.5 2005/03/15 20:09:44 hendriks73 Exp $
127: * @see MetaServer
128: */
129: public class MetaClient extends Thread {
130:
131: /**
132: * Source-Version
133: */
134: public static String vcid = "$Id: MetaClient.java,v 1.5 2005/03/15 20:09:44 hendriks73 Exp $";
135:
136: /**
137: * Socket dieses Clients.
138: */
139: protected static Socket mySocket = null;
140:
141: /**
142: * InputStreamReader einer Instanz.
143: */
144: protected InputStreamReader in;
145:
146: /**
147: * PrintWriter einer Instanz.
148: */
149: protected PrintWriter out;
150:
151: /**
152: * Startet den Thread.
153: *
154: * @param in Eingabe-Reader
155: * @param out Ausgabe-Writer
156: */
157: public MetaClient(InputStreamReader in, PrintWriter out) {
158: this .in = in;
159: this .out = out;
160:
161: start();
162: }
163:
164: /**
165: * Liest eine Zeile aus dem Eingabe-Reader und schreibt
166: * sie in die Ausgabe-Writer.
167: */
168: public void run() {
169: String line;
170:
171: try {
172: while ((line = readLine(in)) != null) {
173: out.println(line);
174: }
175: } catch (IOException ioe) {
176: System.err.println(ioe.toString());
177: }
178:
179: System.exit(0);
180: }
181:
182: /**
183: * Liest eine Zeile mit dem Reader.
184: *
185: * @param aReader Reader, mit dem gelesen werden soll
186: * @exception IOException falls beim Lesen was schiefgeht
187: */
188: protected static String readLine(Reader aReader) throws IOException {
189: StringBuffer buf = new StringBuffer(1024);
190: int c;
191:
192: LineLoop: while ((c = aReader.read()) != -1) {
193: switch (c) {
194:
195: case '\n':
196: break LineLoop;
197:
198: default:
199: buf.append((char) c);
200:
201: break;
202: }
203: }
204:
205: if (c == -1 && buf.length() == 0) {
206: return null;
207: }
208:
209: return buf.toString().trim();
210: }
211:
212: /**
213: * Baut die Verbindung auf und instantiiert dann die Klasse
214: * MetaClient zweimal - für jede Kommunikationsrichtung eine.
215: *
216: * @param args Hostname im ersten Argument, Portnummer im zweiten
217: */
218: public static void main(String[] args) throws Exception {
219: if (args.length != 2) {
220: usage();
221: } else {
222: mySocket = new Socket(InetAddress.getByName(args[0]),
223: new Integer(args[1]).intValue());
224:
225: PrintWriter distOut = new PrintWriter(
226: new OutputStreamWriter(mySocket.getOutputStream()),
227: true);
228: PrintWriter localOut = new PrintWriter(System.out, true);
229: InputStreamReader localIn = new InputStreamReader(System.in);
230: InputStreamReader distIn = new InputStreamReader(mySocket
231: .getInputStream());
232:
233: new MetaClient(localIn, distOut);
234: new MetaClient(distIn, localOut);
235: }
236: }
237:
238: /**
239: * Gibt den Usage-Hinweis aus:
240: * <xmp>
241: * Usage: java com.tagtraum.framework.server.MetaClient <hostname> <port>
242: * </xmp>
243: */
244: public static void usage() {
245: System.out
246: .println("Usage: java com.tagtraum.metaserver.MetaClient <hostname> <port>");
247: }
248:
249: }
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