private async Task <IPlugin> CreatePluginAsync(
string filePath,
IEnumerable <string> arguments,
IRequestHandlers requestHandlers,
ConnectionOptions options,
CancellationToken sessionCancellationToken)
{
var args = string.Join(" ", arguments);
#if IS_DESKTOP
var startInfo = new ProcessStartInfo(filePath)
{
Arguments = args,
UseShellExecute = false,
RedirectStandardError = false,
RedirectStandardInput = true,
RedirectStandardOutput = true,
StandardOutputEncoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false),
WindowStyle = ProcessWindowStyle.Hidden,
};
#else
var startInfo = new ProcessStartInfo
{
FileName = Environment.GetEnvironmentVariable("DOTNET_HOST_PATH"),
Arguments = $"\"{filePath}\" " + args,
UseShellExecute = false,
RedirectStandardError = false,
RedirectStandardInput = true,
RedirectStandardOutput = true,
StandardOutputEncoding = new UTF8Encoding(encoderShouldEmitUTF8Identifier: false),
WindowStyle = ProcessWindowStyle.Hidden,
};
#endif
var pluginProcess = new PluginProcess(startInfo);
string pluginId = Plugin.CreateNewId();
using (var combinedCancellationTokenSource = CancellationTokenSource.CreateLinkedTokenSource(sessionCancellationToken))
{
// Process ID is unavailable until we start the process; however, we want to wire up this event before
// attempting to start the process in case the process immediately exits.
EventHandler <IPluginProcess> onExited = null;
Connection connection = null;
onExited = (object eventSender, IPluginProcess exitedProcess) =>
{
exitedProcess.Exited -= onExited;
OnPluginProcessExited(eventSender, exitedProcess, pluginId);
if (connection?.State == ConnectionState.Handshaking)
{
combinedCancellationTokenSource.Cancel();
}
};
pluginProcess.Exited += onExited;
var stopwatch = Stopwatch.StartNew();
pluginProcess.Start();
if (_logger.IsEnabled)
{
WriteCommonLogMessages(_logger);
}
var sender = new Sender(pluginProcess.StandardInput);
var receiver = new StandardOutputReceiver(pluginProcess);
var processingHandler = new InboundRequestProcessingHandler(new HashSet <MessageMethod> {
MessageMethod.Handshake, MessageMethod.Log
});
var messageDispatcher = new MessageDispatcher(requestHandlers, new RequestIdGenerator(), processingHandler, _logger);
connection = new Connection(messageDispatcher, sender, receiver, options, _logger);
var plugin = new Plugin(
filePath,
connection,
pluginProcess,
isOwnProcess: false,
idleTimeout: _pluginIdleTimeout,
id: pluginId);
if (_logger.IsEnabled)
{
_logger.Write(new PluginInstanceLogMessage(_logger.Now, plugin.Id, PluginState.Started, pluginProcess.Id));
}
try
{
// Wire up handlers before calling ConnectAsync(...).
plugin.Faulted += OnPluginFaulted;
plugin.Idle += OnPluginIdle;
await connection.ConnectAsync(combinedCancellationTokenSource.Token);
// It's critical that this be registered after ConnectAsync(...).
// If it's registered before, stuff could be disposed, which would lead to unexpected exceptions.
// If the plugin process exited before this event is registered, an exception should be caught below.
plugin.Exited += OnPluginExited;
}
catch (ProtocolException ex)
{
plugin.Dispose();
throw new ProtocolException(
string.Format(CultureInfo.CurrentCulture, Strings.Plugin_Exception, plugin.Name, ex.Message));
}
catch (TaskCanceledException ex)
{
stopwatch.Stop();
plugin.Dispose();
throw new PluginException(
string.Format(
CultureInfo.CurrentCulture,
Strings.Plugin_FailedOnCreation,
plugin.Name,
stopwatch.Elapsed.TotalSeconds,
pluginProcess.ExitCode),
ex);
}
catch (Exception)
{
plugin.Dispose();
throw;
}
return(plugin);
}
}