[77] | 1 | package com.framsticks.communication; |
---|
| 2 | |
---|
[85] | 3 | import com.framsticks.util.io.Encoding; |
---|
[84] | 4 | import com.framsticks.util.lang.Pair; |
---|
[77] | 5 | import org.apache.log4j.Logger; |
---|
| 6 | import java.io.BufferedReader; |
---|
| 7 | import java.io.IOException; |
---|
| 8 | import java.io.InputStreamReader; |
---|
[85] | 9 | import java.io.OutputStreamWriter; |
---|
[77] | 10 | import java.io.PrintWriter; |
---|
| 11 | import java.net.Socket; |
---|
| 12 | import java.net.SocketTimeoutException; |
---|
| 13 | import java.util.regex.Matcher; |
---|
| 14 | import java.util.regex.Pattern; |
---|
| 15 | |
---|
[85] | 16 | import com.framsticks.util.dispatching.RunAt; |
---|
| 17 | import com.framsticks.util.dispatching.Thread; |
---|
| 18 | |
---|
[77] | 19 | public abstract class Connection { |
---|
| 20 | |
---|
[84] | 21 | protected final static Logger log = Logger.getLogger(Connection.class); |
---|
[77] | 22 | |
---|
| 23 | protected PrintWriter output = null; |
---|
| 24 | protected BufferedReader input = null; |
---|
| 25 | |
---|
| 26 | protected Socket socket = null; |
---|
| 27 | |
---|
| 28 | protected volatile boolean connected = false; |
---|
| 29 | |
---|
| 30 | public boolean requestIdEnabled = false; |
---|
| 31 | |
---|
| 32 | protected int protocolVersion = -1; |
---|
| 33 | |
---|
[85] | 34 | protected final Thread<Connection> senderThread = new Thread<>(); |
---|
| 35 | protected final Thread<Connection> receiverThread = new Thread<>(); |
---|
[77] | 36 | |
---|
| 37 | public boolean isConnected() { |
---|
| 38 | return connected; |
---|
| 39 | } |
---|
| 40 | |
---|
| 41 | public void close() { |
---|
| 42 | protocolVersion = -1; |
---|
| 43 | try { |
---|
| 44 | connected = false; |
---|
| 45 | |
---|
[84] | 46 | senderThread.interrupt(); |
---|
| 47 | senderThread.join(); |
---|
[77] | 48 | |
---|
[85] | 49 | receiverThread.interrupt(); |
---|
| 50 | receiverThread.join(); |
---|
| 51 | |
---|
[77] | 52 | if (output != null) { |
---|
| 53 | output.close(); |
---|
| 54 | output = null; |
---|
| 55 | } |
---|
| 56 | |
---|
| 57 | if (input != null) { |
---|
| 58 | input.close(); |
---|
| 59 | input = null; |
---|
| 60 | } |
---|
| 61 | |
---|
| 62 | |
---|
| 63 | if (socket != null) { |
---|
| 64 | socket.close(); |
---|
| 65 | socket = null; |
---|
| 66 | } |
---|
| 67 | |
---|
[84] | 68 | log.info("connection closed"); |
---|
[77] | 69 | } catch (Exception e) { |
---|
[84] | 70 | log.error(e); |
---|
[77] | 71 | } |
---|
| 72 | |
---|
| 73 | } |
---|
| 74 | |
---|
| 75 | protected static final String ARGUMENT_PATTERN_FRAGMENT = "((?:\\S+)|(?:\"[^\"]*\"))"; |
---|
[85] | 76 | protected static final Pattern requestIdEnabledPattern = Pattern.compile("^\\s*([0-9]+)(?:\\s+" + ARGUMENT_PATTERN_FRAGMENT + ")?\\n$"); |
---|
| 77 | protected static final Pattern requestIDisabledPattern = Pattern.compile("^\\s*" + ARGUMENT_PATTERN_FRAGMENT + "?\\n$"); |
---|
| 78 | protected static final Pattern eventPattern = Pattern.compile("^\\s*(\\S+)\\s*(\\S+)\\n"); |
---|
[77] | 79 | |
---|
| 80 | |
---|
[84] | 81 | protected final Pair<Integer, String> parseRest(String rest) { |
---|
| 82 | Matcher matcher = (requestIdEnabled ? requestIdEnabledPattern : requestIDisabledPattern).matcher(rest); |
---|
| 83 | if (!matcher.matches()) { |
---|
| 84 | log.fatal("unmatched first line of input: " + rest); |
---|
| 85 | return null; |
---|
| 86 | } |
---|
| 87 | return new Pair<Integer, String>(requestIdEnabled ? Integer.parseInt(matcher.group(1)) : null, matcher.group(requestIdEnabled ? 2 : 1)); |
---|
| 88 | } |
---|
[77] | 89 | |
---|
[84] | 90 | static final int BUFFER_LENGTH = 1024; |
---|
[77] | 91 | |
---|
[84] | 92 | int readChars = 0; |
---|
| 93 | int iterator = 0; |
---|
| 94 | int bufferStart = 0; |
---|
| 95 | char[] readBuffer = new char[BUFFER_LENGTH]; |
---|
[77] | 96 | |
---|
[84] | 97 | protected String getLine() throws Exception { |
---|
| 98 | StringBuilder lineBuffer = new StringBuilder(); |
---|
| 99 | while (!Thread.interrupted()) { |
---|
| 100 | while (iterator < readChars) { |
---|
| 101 | if (readBuffer[iterator] != '\n') { |
---|
| 102 | ++iterator; |
---|
| 103 | continue; |
---|
| 104 | } |
---|
| 105 | lineBuffer.append(readBuffer, bufferStart, iterator - bufferStart + 1); |
---|
| 106 | ++iterator; |
---|
| 107 | bufferStart = iterator; |
---|
| 108 | return lineBuffer.toString(); |
---|
| 109 | } |
---|
| 110 | lineBuffer.append(readBuffer, bufferStart, readChars - bufferStart); |
---|
[77] | 111 | |
---|
[84] | 112 | readChars = 0; |
---|
| 113 | while (readChars == 0) { |
---|
| 114 | try { |
---|
| 115 | readChars = input.read(readBuffer); |
---|
| 116 | } catch (SocketTimeoutException ignored) { |
---|
| 117 | //timeout - continue |
---|
| 118 | } |
---|
| 119 | } |
---|
| 120 | iterator = 0; |
---|
| 121 | bufferStart = 0; |
---|
| 122 | } |
---|
| 123 | throw new InterruptedException(); |
---|
| 124 | } |
---|
[77] | 125 | |
---|
[84] | 126 | protected abstract void receiverThreadRoutine() throws Exception; |
---|
[77] | 127 | |
---|
[84] | 128 | protected void runThreads() { |
---|
| 129 | try { |
---|
[85] | 130 | output = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), Encoding.getFramsticksCharset()), true); |
---|
| 131 | input = new BufferedReader(new InputStreamReader(socket.getInputStream(), Encoding.getFramsticksCharset())); |
---|
[84] | 132 | } catch (IOException e) { |
---|
| 133 | log.error("buffer creation failure"); |
---|
| 134 | close(); |
---|
| 135 | return; |
---|
| 136 | } |
---|
[77] | 137 | |
---|
[84] | 138 | senderThread.setName(this + "-sender"); |
---|
[85] | 139 | receiverThread.setName(this + "-receiver"); |
---|
| 140 | |
---|
| 141 | senderThread.start(); |
---|
| 142 | receiverThread.start(); |
---|
| 143 | |
---|
| 144 | receiverThread.invokeLater(new RunAt<Connection>() { |
---|
[84] | 145 | @Override |
---|
| 146 | public void run() { |
---|
| 147 | try { |
---|
| 148 | receiverThreadRoutine(); |
---|
| 149 | } catch (InterruptedException ignored) { |
---|
| 150 | log.debug("receiver thread interrupted"); |
---|
| 151 | } catch (Exception e) { |
---|
| 152 | log.error("error: " + e); |
---|
| 153 | close(); |
---|
| 154 | } |
---|
| 155 | } |
---|
| 156 | }); |
---|
[77] | 157 | |
---|
[84] | 158 | } |
---|
[77] | 159 | |
---|
| 160 | |
---|
| 161 | /** |
---|
| 162 | * Returns Query associated with query getId. |
---|
| 163 | * |
---|
| 164 | * @return Query associated with query getId. |
---|
| 165 | */ |
---|
| 166 | |
---|
| 167 | public int getProtocolVersion() { |
---|
| 168 | return protocolVersion; |
---|
| 169 | } |
---|
| 170 | |
---|
| 171 | |
---|
| 172 | |
---|
| 173 | } |
---|