[65] | 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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