Emby.Server.Implementations/Diagnostics/CommonProcess.cs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155

using System;
using System.Diagnostics;
using System.IO;
using System.Threading.Tasks;
using MediaBrowser.Model.Diagnostics;
using System.Threading;

namespace Emby.Server.Implementations.Diagnostics
{
    public class CommonProcess : IProcess
    {
        public event EventHandler Exited;

        private readonly ProcessOptions _options;
        private readonly Process _process;

        public CommonProcess(ProcessOptions options)
        {
            _options = options;

            var startInfo = new ProcessStartInfo
            {
                Arguments = options.Arguments,
                FileName = options.FileName,
                WorkingDirectory = options.WorkingDirectory,
                UseShellExecute = options.UseShellExecute,
                CreateNoWindow = options.CreateNoWindow,
                RedirectStandardError = options.RedirectStandardError,
                RedirectStandardInput = options.RedirectStandardInput,
                RedirectStandardOutput = options.RedirectStandardOutput
            };

            startInfo.ErrorDialog = options.ErrorDialog;

            if (options.IsHidden)
            {
                startInfo.WindowStyle = ProcessWindowStyle.Hidden;
            }

            _process = new Process
            {
                StartInfo = startInfo
            };

            if (options.EnableRaisingEvents)
            {
                _process.EnableRaisingEvents = true;
                _process.Exited += _process_Exited;
            }
        }

        private bool _hasExited;
        private bool HasExited
        {
            get
            {
                if (_hasExited)
                {
                    return true;
                }

                try
                {
                    _hasExited = _process.HasExited;
                }
                catch (InvalidOperationException)
                {
                    _hasExited = true;
                }

                return _hasExited;
            }
        }

        private void _process_Exited(object sender, EventArgs e)
        {
            _hasExited = true;
            if (Exited != null)
            {
                Exited(this, e);
            }
        }

        public ProcessOptions StartInfo
        {
            get { return _options; }
        }

        public StreamWriter StandardInput
        {
            get { return _process.StandardInput; }
        }

        public StreamReader StandardError
        {
            get { return _process.StandardError; }
        }

        public StreamReader StandardOutput
        {
            get { return _process.StandardOutput; }
        }

        public int ExitCode
        {
            get { return _process.ExitCode; }
        }

        public void Start()
        {
            _process.Start();
        }

        public void Kill()
        {
            _process.Kill();
        }

        public bool WaitForExit(int timeMs)
        {
            return _process.WaitForExit(timeMs);
        }

        public Task<bool> WaitForExitAsync(int timeMs)
        {
            //if (_process.WaitForExit(100))
            //{
            //    return Task.FromResult(true);
            //}

            //timeMs -= 100;
            timeMs = Math.Max(0, timeMs);

            var tcs = new TaskCompletionSource<bool>();

            var cancellationToken = new CancellationTokenSource(timeMs).Token;

            if (HasExited)
            {
                return Task.FromResult(true);
            }

            _process.Exited += (sender, args) => tcs.TrySetResult(true);

            cancellationToken.Register(() => tcs.TrySetResult(HasExited));

            return tcs.Task;
        }

        public void Dispose()
        {
            _process.Dispose();
        }
    }
}