private void HandleExceptions(List <Task> tasks)
{
List <Exception> exceptions = new List <Exception>();
for (int i = 0; i < tasks.Count; i++)
{
Task task = tasks[i];
IPluginConfigurationItem plugin = _pluginConfiguration.Plugins.ElementAt(i);
if (task.IsFaulted)
{
var summary = $"An exception was thrown when starting the plugin {plugin.Description}.";
_logger.Write(summary, task.Exception);
exceptions.AddRange(task.Exception.InnerExceptions);
}
else if (task.IsCompleted)
{
_logger.Write($"{plugin.Description} started successfully.");
}
}
if (exceptions.Count > 0)
{
throw new AggregateException("One or more plugins failed to start. See inner exceptions for more details.",
exceptions);
}
}
private void LogPluginInformation(IPluginConfigurationItem pluginConfiguration)
{
var stringBuilder = new StringBuilder();
stringBuilder.AppendLine("=====================================");
stringBuilder.AppendLine($"Description: {pluginConfiguration.Description}");
stringBuilder.AppendLine($"Assembly: {pluginConfiguration.Assembly}");
stringBuilder.AppendLine($"Type: {pluginConfiguration.Type}");
stringBuilder.AppendLine($"Base Directory: {pluginConfiguration.BaseDirectory}");
stringBuilder.AppendLine($"Configuration File: {pluginConfiguration.ConfigurationFile}");
stringBuilder.AppendLine("=====================================");
stringBuilder.AppendLine();
_logger.Write(stringBuilder.ToString());
}
private PluginContext LoadPlugin(IPluginConfigurationItem pluginConfiguration)
{
try
{
string baseDirectory = pluginConfiguration.BaseDirectory;
if (string.IsNullOrEmpty(Path.GetPathRoot(baseDirectory)) || Path.GetPathRoot(baseDirectory) == @"\")
{
// Relative path. Append current directory.
baseDirectory = Path.Combine(_currentDirectory, baseDirectory);
}
if (!Directory.Exists(baseDirectory))
{
throw new DirectoryNotFoundException(baseDirectory);
}
var appDomainSetup = new AppDomainSetup
{
ApplicationBase = baseDirectory,
ApplicationName = pluginConfiguration.Description,
ConfigurationFile = pluginConfiguration.ConfigurationFile
};
var appDomain =
AppDomain.CreateDomain(pluginConfiguration.Description, new Evidence(), appDomainSetup);
PluginService service = (PluginService)appDomain.CreateInstanceAndUnwrap(pluginConfiguration.Assembly,
pluginConfiguration.Type);
return(new PluginContext(appDomain, service));
}
catch (Exception e)
{
var summary = $"Failed to load the plugin {pluginConfiguration.Description}.";
_logger.Write(summary, e);
throw;
}
}
public void AddConfigurationItem(IPluginConfigurationItem pluginConfigurationItem)
{
_pluginConfigurationItems.Add(pluginConfigurationItem);
}
