1 | // Copyright 2012 Georg-August-Universität Göttingen, Germany |
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2 | // |
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3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
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4 | // you may not use this file except in compliance with the License. |
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5 | // You may obtain a copy of the License at |
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6 | // |
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7 | // http://www.apache.org/licenses/LICENSE-2.0 |
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8 | // |
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9 | // Unless required by applicable law or agreed to in writing, software |
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10 | // distributed under the License is distributed on an "AS IS" BASIS, |
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11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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12 | // See the License for the specific language governing permissions and |
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13 | // limitations under the License. |
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14 | |
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15 | package de.ugoe.cs.autoquest.httpmonitor; |
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16 | |
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17 | import javax.servlet.Servlet; |
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18 | |
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19 | import org.eclipse.jetty.server.Server; |
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20 | import org.eclipse.jetty.servlet.ServletContextHandler; |
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21 | import org.eclipse.jetty.servlet.ServletHolder; |
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22 | |
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23 | import de.ugoe.cs.util.console.Console; |
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24 | |
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25 | /** |
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26 | * <p> |
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27 | * this is the web server, that is used either for the monitor or the proxy. It is initialized with |
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28 | * a port and the servlet to be deployed. It implements the {@link HttpMonitorComponent} to be |
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29 | * simply initialized, started, and stopped. |
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30 | * </p> |
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31 | * |
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32 | * @author Patrick Harms |
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33 | */ |
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34 | public class HttpMonitorServer implements HttpMonitorComponent { |
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35 | |
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36 | /** |
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37 | * the port to listen on |
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38 | */ |
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39 | private int port; |
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40 | |
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41 | /** |
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42 | * the jetty web server used for receiving messages |
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43 | */ |
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44 | private Server server; |
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45 | |
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46 | /** |
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47 | * the message listener to forward the messages to |
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48 | */ |
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49 | private Servlet servlet; |
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50 | |
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51 | /** |
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52 | * <p> |
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53 | * initializes the server with the port to listen on and the servlet to be deployed. |
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54 | * </p> |
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55 | * |
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56 | * @param port the port to listen on |
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57 | * @param servlet the servlet to be deployed |
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58 | */ |
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59 | public HttpMonitorServer(int port, Servlet servlet) { |
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60 | this.port = port; |
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61 | this.servlet = servlet; |
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62 | } |
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63 | |
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64 | /* (non-Javadoc) |
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65 | * @see de.ugoe.cs.autoquest.htmlmonitor.HttpMonitorComponent#init() |
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66 | */ |
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67 | @Override |
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68 | public synchronized void init() { |
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69 | if (server != null) { |
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70 | throw new IllegalStateException("already initialized. First call stop()"); |
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71 | } |
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72 | |
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73 | server = new Server(port); |
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74 | |
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75 | /* |
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76 | // the following code can be used to support SSL directly |
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77 | server = new Server(); |
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78 | |
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79 | SslSocketConnector connector = new SslSocketConnector(); |
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80 | connector.setPort(port); |
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81 | connector.setKeystore("data/keystore"); |
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82 | connector.setPassword("123456"); |
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83 | connector.setKeyPassword("123456"); |
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84 | connector.setTruststore("data/keystore"); |
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85 | connector.setTrustPassword("123456"); |
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86 | server.addConnector(connector);*/ |
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87 | |
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88 | ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS); |
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89 | context.setContextPath("/"); |
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90 | server.setHandler(context); |
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91 | |
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92 | context.addServlet(new ServletHolder(servlet), "/*"); |
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93 | } |
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94 | |
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95 | /* (non-Javadoc) |
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96 | * @see de.ugoe.cs.autoquest.htmlmonitor.HttpMonitorComponent#start() |
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97 | */ |
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98 | @Override |
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99 | public synchronized void start() throws HttpMonitorException { |
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100 | if (server == null) { |
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101 | throw new IllegalStateException("server not initialized yet. First call init()"); |
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102 | } |
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103 | |
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104 | try { |
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105 | server.start(); |
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106 | } |
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107 | catch (Exception e) { |
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108 | throw new HttpMonitorException("could not start server", e); |
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109 | } |
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110 | } |
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111 | |
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112 | |
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113 | /* (non-Javadoc) |
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114 | * @see de.ugoe.cs.autoquest.htmlmonitor.HttpMonitorComponent#stop() |
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115 | */ |
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116 | @Override |
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117 | public synchronized void stop() { |
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118 | try { |
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119 | if (server != null) { |
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120 | server.stop(); |
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121 | } |
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122 | } |
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123 | catch (Exception e) { |
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124 | Console.printerrln("could not stop server: " + e.getMessage()); |
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125 | Console.logException(e); |
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126 | } |
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127 | } |
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128 | |
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129 | } |
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