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1/*
2 * Copyright (c) Contributors, http://opensimulator.org/
3 * See CONTRIBUTORS.TXT for a full list of copyright holders.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 * * Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * * Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 * * Neither the name of the OpenSim Project nor the
13 * names of its contributors may be used to endorse or promote products
14 * derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
18 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
19 * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
20 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
21 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
22 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
23 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
25 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27using System;
28using System.Collections;
29using System.Diagnostics;
30using System.IO;
31using System.Reflection;
32using System.Text;
33using System.Threading;
34using log4net;
35
36namespace OpenSim.GridLaunch
37{
38 internal partial class AppExecutor : IDisposable
39 {
40 // How long to wait for process to shut down by itself
41 private static readonly int shutdownWaitSeconds = 10;
42
43 private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
44
45 //private StreamWriter Input { get { return process.StandardInput; } }
46 //private StreamReader Output { get { return process.StandardOutput; } }
47 //private StreamReader Error { get { return process.StandardError; } }
48
49 private StreamWriter Input { get; set; }
50 private StreamReader Output { get; set; }
51 private StreamReader Error { get; set; }
52
53 private object processLock = new object();
54
55 private bool isRunning = false;
56 public bool IsRunning { get { return isRunning; } }
57
58 private string file;
59 public string File { get { return file; } }
60
61 Process process;
62
63 public AppExecutor(string File)
64 {
65 file = File;
66 }
67
68 #region Dispose of unmanaged resources
69 ~AppExecutor()
70 {
71 Dispose();
72 }
73 private bool isDisposed = false;
74 public void Dispose()
75 {
76 if (!isDisposed)
77 {
78 isDisposed = true;
79 Stop();
80 }
81 }
82 #endregion
83
84 #region Start / Stop process
85 public void Start()
86 {
87 if (isDisposed)
88 throw new ApplicationException("Attempt to start process in Disposed instance of AppExecutor.");
89 // Stop before starting
90 Stop();
91
92 lock (processLock)
93 {
94 isRunning = true;
95
96 m_log.InfoFormat("Starting \"{0}\".", file);
97
98 // Start the process
99 process = new Process();
100 process.StartInfo.FileName = file;
101 process.StartInfo.Arguments = "";
102 process.StartInfo.CreateNoWindow = true;
103 process.StartInfo.UseShellExecute = false;
104 process.StartInfo.ErrorDialog = false;
105 process.EnableRaisingEvents = true;
106
107
108 // Redirect all standard input/output/errors
109 process.StartInfo.RedirectStandardInput = true;
110 process.StartInfo.RedirectStandardOutput = true;
111 process.StartInfo.RedirectStandardError = true;
112
113 // Start process
114 process.Start();
115
116 Input = process.StandardInput;
117 Output = process.StandardOutput;
118 Error = process.StandardError;
119
120 // Start data copying
121 timer_Start();
122
123 // We will flush manually
124 //Input.AutoFlush = false;
125
126 }
127 }
128
129 public void Stop()
130 {
131 // Shut down process
132 // We will ignore some exceptions here, against good programming practice... :)
133
134 lock (processLock)
135 {
136 // Running?
137 if (!isRunning)
138 return;
139 isRunning = false;
140
141 timer_Stop();
142
143 m_log.InfoFormat("Stopping \"{0}\".", file);
144
145 // Send exit command to console
146 try
147 {
148 if (Input != null)
149 {
150 _writeLine("");
151 _writeLine("exit");
152 _writeLine("quit");
153 // Wait for process to exit
154 process.WaitForExit(1000 * shutdownWaitSeconds);
155 }
156 }
157 catch (Exception ex)
158 {
159 m_log.ErrorFormat("Exeption asking \"{0}\" to shut down: {1}", file, ex.ToString());
160 }
161
162 try
163 {
164 // Forcefully kill it
165 if (process.HasExited != true)
166 process.Kill();
167 }
168 catch (Exception ex)
169 {
170 m_log.ErrorFormat("Exeption killing \"{0}\": {1}", file, ex.ToString());
171 }
172
173 try
174 {
175 // Free resources
176 process.Close();
177 }
178 catch (Exception ex)
179 {
180 m_log.ErrorFormat("Exeption freeing resources for \"{0}\": {1}", file, ex.ToString());
181 }
182
183 // Dispose of stream and process object
184 //SafeDisposeOf(Input);
185 //SafeDisposeOf(Output);
186 //SafeDisposeOf(Error);
187 Program.SafeDisposeOf(process);
188 }
189
190 // Done stopping process
191 }
192
193 #endregion
194
195 #region Write to stdInput
196 public void Write(string Text)
197 {
198 // Lock so process won't shut down while we write, and that we won't write while proc is shutting down
199 lock (processLock)
200 {
201 _write(Text);
202 }
203 }
204 public void _write(string Text)
205 {
206 if (Input != null)
207 {
208 try
209 {
210 Input.Write(Text);
211 Input.Flush();
212 }
213 catch (Exception ex)
214 {
215 m_log.ErrorFormat("Exeption sending text \"{0}\" to \"{1}\": {2}", file, Text, ex.ToString());
216 }
217
218 }
219 }
220 public void WriteLine(string Text)
221 {
222 // Lock so process won't shut down while we write, and that we won't write while proc is shutting down
223 lock (processLock)
224 {
225 _writeLine(Text);
226 }
227 }
228 public void _writeLine(string Text)
229 {
230 if (Input != null)
231 {
232 try
233 {
234 m_log.DebugFormat("\"{0}\": Sending: \"{1}\"", file, Text);
235 Input.WriteLine(Text);
236 Input.Flush();
237 }
238 catch (Exception ex)
239 {
240 m_log.ErrorFormat("Exeption sending text \"{0}\" to \"{1}\": {2}", file, Text, ex.ToString());
241 }
242 }
243 }
244 #endregion
245
246 }
247}