View Javadoc

    1   /*
    2    $Id: GroovySocketServer.java,v 1.7 2005/06/10 14:05:02 cstein Exp $
    3
    4    Copyright 2003 (C) James Strachan and Bob Mcwhirter. All Rights Reserved.
    5
    6    Redistribution and use of this software and associated documentation
    7    ("Software"), with or without modification, are permitted provided
    8    that the following conditions are met:
    9
    10   1. Redistributions of source code must retain copyright
    11      statements and notices.  Redistributions must also contain a
    12      copy of this document.
    13
    14   2. Redistributions in binary form must reproduce the
    15      above copyright notice, this list of conditions and the
    16      following disclaimer in the documentation and/or other
    17      materials provided with the distribution.
    18
    19   3. The name "groovy" must not be used to endorse or promote
    20      products derived from this Software without prior written
    21      permission of The Codehaus.  For written permission,
    22      please contact info@codehaus.org.
    23
    24   4. Products derived from this Software may not be called "groovy"
    25      nor may "groovy" appear in their names without prior written
    26      permission of The Codehaus. "groovy" is a registered
    27      trademark of The Codehaus.
    28
    29   5. Due credit should be given to The Codehaus -
    30      http://groovy.codehaus.org/
    31
    32   THIS SOFTWARE IS PROVIDED BY THE CODEHAUS AND CONTRIBUTORS
    33   ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT
    34   NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
    35   FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
    36   THE CODEHAUS OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
    37   INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
    38   (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
    39   SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    40   HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
    41   STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
    42   ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
    43   OF THE POSSIBILITY OF SUCH DAMAGE.
    44
    45   */
    46  package groovy.ui;
    47
    48  import groovy.lang.GroovyShell;
    49  import groovy.lang.Script;
    50
    51  import java.io.BufferedReader;
    52  import java.io.FileInputStream;
    53  import java.io.IOException;
    54  import java.io.InputStreamReader;
    55  import java.io.PrintWriter;
    56  import java.net.InetAddress;
    57  import java.net.ServerSocket;
    58  import java.net.Socket;
    59  import java.net.URL;
    60
    61  /***
    62   * Simple server that executes supplied script against a socket
    63   * @author Jeremy Rayner
    64   */
    65
    66  public class GroovySocketServer implements Runnable {
    67      private URL url;
    68      private GroovyShell groovy;
    69      private boolean isScriptFile;
    70      private String scriptFilenameOrText;
    71      private boolean autoOutput;
    72
    73      public GroovySocketServer(GroovyShell groovy, boolean isScriptFile, String scriptFilenameOrText, boolean autoOutput, int port) {
    74          this.groovy = groovy;
    75          this.isScriptFile = isScriptFile;
    76          this.scriptFilenameOrText = scriptFilenameOrText;
    77          this.autoOutput = autoOutput;
    78          try {
    79              url = new URL("http", InetAddress.getLocalHost().getHostAddress(), port, "/");
    80              System.out.println("groovy is listening on port " + port);
    81          } catch (IOException e) {
    82              e.printStackTrace();
    83          }
    84          new Thread(this).start();
    85      }
    86
    87      public void run() {
    88          try {
    89              ServerSocket serverSocket = new ServerSocket(url.getPort());
    90              while (true) {
    91                  // Create one script per socket connection.
    92                  // This is purposefully not caching the Script
    93                  // so that the script source file can be changed on the fly,
    94                  // as each connection is made to the server.
    95                  Script script;
    96                  if (isScriptFile) {
    97                      GroovyMain gm = new GroovyMain();
    98                      script = groovy.parse(new FileInputStream(gm.huntForTheScriptFile(scriptFilenameOrText)));
    99                  } else {
    100                     script = groovy.parse(scriptFilenameOrText);
    101                 }
    102                 new GroovyClientConnection(script, autoOutput, serverSocket.accept());
    103             }
    104         } catch (Exception e) {
    105             e.printStackTrace();
    106         }
    107     }
    108
    109     class GroovyClientConnection implements Runnable {
    110         private Script script;
    111         private Socket socket;
    112         private BufferedReader reader;
    113         private PrintWriter writer;
    114         private boolean autoOutputFlag;
    115
    116         GroovyClientConnection(Script script, boolean autoOutput,Socket socket) throws IOException {
    117             this.script = script;
    118             this.autoOutputFlag = autoOutput;
    119             this.socket = socket;
    120             reader = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    121             writer = new PrintWriter(socket.getOutputStream());
    122             new Thread(this, "Groovy client connection - " + socket.getInetAddress().getHostAddress()).start();
    123         }
    124         public void run() {
    125             try {
    126                 String line = null;
    127                 script.setProperty("out", writer);
    128                 script.setProperty("socket", socket);
    129                 script.setProperty("init", Boolean.TRUE);
    130                 while ((line = reader.readLine()) != null) {
    131                     // System.out.println(line);
    132                     script.setProperty("line", line);
    133                     Object o = script.run();
    134                     script.setProperty("init", Boolean.FALSE);
    135                     if (o != null) {
    136                         if ("success".equals(o)) {
    137                             break; // to close sockets gracefully etc...
    138                         } else {
    139                             if (autoOutputFlag) {
    140                                 writer.println(o);
    141                             }
    142                         }
    143                     }
    144                     writer.flush();
    145                 }
    146             } catch (IOException e) {
    147                 e.printStackTrace();
    148             } finally {
    149                 try {
    150                     writer.flush();
    151                     writer.close();
    152                 } finally {
    153                     try {
    154                         socket.close();
    155                     } catch (IOException e3) {
    156                         e3.printStackTrace();
    157                     }
    158                 }
    159             }
    160         }
    161     }
    162 }