[66] | 1 | package com.framsticks.net.client3D; |
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| 2 | |
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| 3 | import java.io.BufferedReader; |
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| 4 | import java.io.IOException; |
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| 5 | import java.io.InputStreamReader; |
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| 6 | import java.io.PrintWriter; |
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| 7 | import java.net.Socket; |
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| 8 | import java.util.ArrayList; |
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| 9 | |
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| 10 | /** |
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| 11 | * Communication class. |
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| 12 | * |
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| 13 | * @author MoMaT (modified by vorg @ 2007/01/25) |
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| 14 | */ |
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| 15 | public class Communication { |
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| 16 | private Socket socket = null; |
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| 17 | private PrintWriter out = null; |
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| 18 | private BufferedReader in = null; |
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| 19 | protected boolean connected = false; |
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| 20 | |
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| 21 | private ArrayList<String> log = new ArrayList<String>(); |
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| 22 | |
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| 23 | /** |
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| 24 | * Connect to a server. |
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| 25 | * |
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| 26 | * @param ip |
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| 27 | * @param port |
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| 28 | * @throws IOException |
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| 29 | * Thrown on I/O error. |
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| 30 | */ |
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| 31 | public void connect(String ip, int port) throws IOException { |
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| 32 | try { |
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| 33 | socket = new Socket(ip, port); |
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| 34 | out = new PrintWriter(socket.getOutputStream(), true); |
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| 35 | in = new BufferedReader(new InputStreamReader( |
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| 36 | socket.getInputStream())); |
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| 37 | |
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| 38 | connected = true; |
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| 39 | sendMessage("version 3"); |
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| 40 | String message = in.readLine(); |
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| 41 | log.add("> " + message); |
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| 42 | |
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| 43 | } catch (Exception e) { |
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| 44 | Log.getInstance().log("err", e.toString()); |
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| 45 | } |
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| 46 | } |
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| 47 | |
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| 48 | /** |
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| 49 | * Close connection. |
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| 50 | * |
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| 51 | * @throws IOException |
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| 52 | * Thrown on socket close error. |
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| 53 | */ |
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| 54 | public void disconnect() throws IOException { |
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| 55 | connected = false; |
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| 56 | out.close(); |
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| 57 | in.close(); |
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| 58 | socket.close(); |
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| 59 | } |
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| 60 | |
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| 61 | /** |
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| 62 | * Read a server response. |
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| 63 | * |
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| 64 | * @return server answer |
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| 65 | * @throws IOException |
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| 66 | * Thrown on read error. |
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| 67 | * @throws InterruptedException |
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| 68 | * Thrown on thread sleep interruption. |
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| 69 | * @throws CommunicationErrorException |
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| 70 | * Thrown on protocol error. |
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| 71 | */ |
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| 72 | public ArrayList<String> readMessage() throws IOException, |
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| 73 | InterruptedException, CommunicationErrorException { |
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| 74 | if (!connected) { |
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| 75 | Log.getInstance().log("wrn", |
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| 76 | "Reading message failed. You are not connected!"); |
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| 77 | return new ArrayList<String>(); |
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| 78 | } |
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| 79 | String message = null; |
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| 80 | ArrayList<String> buffer = new ArrayList<String>(); |
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| 81 | |
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| 82 | // gentle wait for input on socket |
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| 83 | // elapsedTime added by vorg to avoid infinite loop |
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| 84 | int elapsedTime = 0; |
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| 85 | while (false == in.ready()) { |
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| 86 | Thread.sleep(100); |
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| 87 | elapsedTime++; |
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| 88 | if (elapsedTime > 100) { |
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| 89 | throw new InterruptedException("Request timeout"); |
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| 90 | } |
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| 91 | } |
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| 92 | |
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| 93 | // read server answer |
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| 94 | while ((message = in.readLine()) != null) { |
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| 95 | log.add("> " + message); |
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| 96 | // stop if reading complete |
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| 97 | if (message.startsWith("ok")) { |
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| 98 | // add ok line if it contains additional info |
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| 99 | if (3 < message.length()) { |
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| 100 | buffer.add(message); |
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| 101 | } |
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| 102 | break; |
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| 103 | } else if (message.startsWith("error")) { |
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| 104 | String error = message.substring(message.indexOf(' ')); |
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| 105 | throw new CommunicationErrorException(error); |
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| 106 | } |
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| 107 | buffer.add(message); |
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| 108 | } |
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| 109 | return buffer; |
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| 110 | } |
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| 111 | |
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| 112 | /** |
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| 113 | * Send request to a server. |
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| 114 | * |
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| 115 | * @param message |
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| 116 | */ |
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| 117 | public void sendMessage(String message) { |
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| 118 | Log.getInstance().log(">>>", message); |
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| 119 | log.add(message); |
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| 120 | if (!connected) { |
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| 121 | Log.getInstance().log("wrn", |
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| 122 | "Sending message failed. You are not connected!"); |
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| 123 | return; |
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| 124 | } |
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| 125 | out.println(message); |
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| 126 | } |
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| 127 | |
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| 128 | /** |
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| 129 | * Log getter. |
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| 130 | * |
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| 131 | * @return log array |
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| 132 | */ |
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| 133 | public ArrayList<String> getLog() { |
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| 134 | return log; |
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| 135 | } |
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| 136 | |
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| 137 | public Boolean isConnected() { |
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| 138 | return connected; |
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| 139 | } |
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| 140 | } |
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