Source Code Cross Referenced for Gate.java in  » 6.0-JDK-Modules » java-3d » com » db » server » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » 6.0 JDK Modules » java 3d » com.db.server 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 2001 Silvere Martin-Michiellot All Rights Reserved.
003:         *
004:         * Silvere Martin-Michiellot grants you ("Licensee") a non-exclusive,
005:         * royalty free, license to use, modify and redistribute this
006:         * software in source and binary code form,
007:         * provided that i) this copyright notice and license appear on all copies of
008:         * the software; and ii) Licensee does not utilize the software in a manner
009:         * which is disparaging to Silvere Martin-Michiellot.
010:         *
011:         * This software is provided "AS IS," without a warranty of any kind. ALL
012:         * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING ANY
013:         * IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE OR
014:         * NON-INFRINGEMENT, ARE HEREBY EXCLUDED. Silvere Martin-Michiellot
015:         * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES
016:         * SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING
017:         * OR DISTRIBUTING THE SOFTWARE OR ITS DERIVATIVES. IN NO EVENT WILL
018:         * Silvere Martin-Michiellot OR ITS LICENSORS BE LIABLE
019:         * FOR ANY LOST REVENUE, PROFIT OR DATA, OR FOR DIRECT,
020:         * INDIRECT, SPECIAL, CONSEQUENTIAL, INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER
021:         * CAUSED AND REGARDLESS OF THE THEORY OF LIABILITY, ARISING OUT OF THE USE OF
022:         * OR INABILITY TO USE SOFTWARE, EVEN IF Silvere Martin-Michiellot HAS BEEN
023:         * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
024:         *
025:         * This software is not designed or intended for use in on-line control of
026:         * aircraft, air traffic, aircraft navigation or aircraft communications; or in
027:         * the design, construction, operation or maintenance of any nuclear
028:         * facility. Licensee represents and warrants that it will not use or
029:         * redistribute the Software for such purposes.
030:         *
031:         * @Author: Silvere Martin-Michiellot
032:         *
033:         */
034:
035:        package com.db.server;
036:
037:        import java.io.*;
038:        import java.net.*;
039:        import java.util.Hashtable;
040:
041:        import com.db.net.*;
042:
043:        //Gate is used for two different purposes:
044:        //it defines a kind of UniverseServerBasicInformation (equivalent to WorldSpotBasicInformation)
045:        //it defines an access point to distant servers
046:
047:        public class Gate {
048:
049:            private Hashtable information;
050:            private InetAddress IP;
051:            private int port;
052:
053:            public Gate(InetAddress IP, int port) {
054:
055:                this .IP = IP;
056:                this .port = port;
057:
058:            }
059:
060:            public Gate(Hashtable information, InetAddress IP, int port) {
061:
062:                this .information = information;
063:                this .IP = IP;
064:                this .port = port;
065:
066:            }
067:
068:            public final Hashtable getInformation(UniverseServer universeServer) {
069:
070:                if (this .information == null) {
071:                    this .updateInformation(universeServer);
072:                }
073:                return this .information;
074:
075:            }
076:
077:            //to refresh informations may be not up to date in getInformation()
078:            public final void updateInformation(UniverseServer universeServer) {
079:
080:                Socket socket;
081:                ObjectOutputStream objectOutputStream;
082:                ObjectInputStream objectInputStream;
083:
084:                ControlRequest controlRequest;
085:                ControlReply controlReply;
086:
087:                //query distant server and fetch informations
088:
089:                try {
090:
091:                    socket = new Socket(universeServer.getIP(), universeServer
092:                            .getPort(), this .getIP(), this .getPort());
093:
094:                    objectInputStream = new ObjectInputStream(socket
095:                            .getInputStream());
096:                    objectOutputStream = new ObjectOutputStream(socket
097:                            .getOutputStream());
098:
099:                    controlRequest = new ControlRequest(
100:                            ControlRequest.INFORMATION);
101:                    // send request
102:                    objectOutputStream.writeObject(controlRequest);
103:
104:                    // read response
105:                    try {
106:
107:                        controlReply = (ControlReply) objectInputStream
108:                                .readObject();
109:
110:                        if (controlReply.getReplyKind() != ControlReply.REFUSED) {
111:
112:                            this .information = (Hashtable) controlReply
113:                                    .getObjectValue();
114:
115:                        } else {
116:
117:                            this .information = new Hashtable();
118:
119:                        }
120:
121:                    } catch (ClassNotFoundException classNotFoundException) {
122:                    }
123:
124:                    objectOutputStream.flush();
125:                    objectInputStream.close();
126:                    objectOutputStream.close();
127:
128:                    socket.close();
129:
130:                } catch (IOException iOException) {
131:                }
132:
133:            }
134:
135:            public final InetAddress getIP() {
136:
137:                return this .IP;
138:
139:            }
140:
141:            public final void setIP(InetAddress IP) {
142:
143:                this .IP = IP;
144:
145:            }
146:
147:            public final int getPort() {
148:
149:                return this .port;
150:
151:            }
152:
153:            public final void setPort(int port) {
154:
155:                this.port = port;
156:
157:            }
158:
159:        }
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