/// <summary>
/// Creates the dependency graph asynchronously.
/// </summary>
/// <param name="path">The dependency definition file.</param>
/// <param name="log">The logger to log messages with.</param>
/// <param name="userCallback">The user callback.</param>
/// <param name="userState">The state of the user.</param>
/// <returns>AsyncResult object</returns>
public IAsyncResult BeginGetDependencyGraph(string path, ILogger log, AsyncCallback userCallback, object userState)
{
Logger.Instance().Log(TraceLevel.Info, "Starting asynchronous graph generation ...");
var asyncResult = new AsyncResult <IGraph>(userCallback, userState);
ThreadPool.QueueUserWorkItem(o =>
{
try
{
var graph = GetDependencyGraph(path, log);
asyncResult.SetAsCompleted(graph, false);
Logger.Instance().Log(TraceLevel.Info, "Asynchronous graph generation finished successfully");
}
catch (Exception ex)
{
var error =
new DependencyServiceException(
"Error while retrieving the dependency graph: " +
ex.Message, ex);
asyncResult.SetAsCompleted(error, false);
Logger.Instance().Log(TraceLevel.Error, "Asynchronous graph download failed: {0}", ex.Message);
}
});
return(asyncResult);
}
/// <summary>
/// Cleans up the downloaded components asynchronously.
/// </summary>
/// <param name="graph">The dependency graph.</param>
/// <param name="log">The logger to log messages with.</param>
/// <param name="userCallback">The user callback.</param>
/// <param name="userState">State of the user.</param>
/// <returns>IAsyncResult object</returns>
public IAsyncResult BeginCleanupGraph(IGraph graph, ILogger log, AsyncCallback userCallback, object userState)
{
Logger.Instance().Log(TraceLevel.Info, "Starting asynchronous graph cleanup ...");
var asyncResult = new AsyncResult <bool>(userCallback, userState);
ThreadPool.QueueUserWorkItem(o =>
{
try
{
CleanupGraph(graph, log);
asyncResult.SetAsCompleted(true, false);
Logger.Instance().Log(TraceLevel.Info, "Asyncronous graph cleanup finished successfully");
}
catch (Exception ex)
{
var error =
new DependencyServiceException(
"Error while cleaning up the dependency graph: " +
ex.Message, ex);
asyncResult.SetAsCompleted(error, false);
Logger.Instance().Log(TraceLevel.Error, "Asynchronous graph cleanup failed: {0}", ex.Message);
}
});
return(asyncResult);
}
