/// <summary>
/// Execute the work item
/// </summary>
private void ExecuteWorkItem()
{
ChoCallerThreadContext ctc = null;
if (null != _callerContext)
{
ctc = ChoCallerThreadContext.Capture();
ChoCallerThreadContext.Apply(_callerContext);
}
Exception exception = null;
object result = null;
try
{
result = _callback(_state);
}
catch (Exception e)
{
// Save the exception so we can rethrow it later
ChoTrace.Write(e);
exception = e;
}
if (null != _callerContext)
{
ChoCallerThreadContext.Apply(ctc);
}
SetResult(result, exception);
}
/// <summary>
/// Captures the current thread context
/// </summary>
/// <returns></returns>
public static ChoCallerThreadContext Capture()
{
ChoCallerThreadContext callerThreadContext = new ChoCallerThreadContext();
Thread thread = Thread.CurrentThread;
callerThreadContext._culture = thread.CurrentCulture;
callerThreadContext._cultureUI = thread.CurrentUICulture;
callerThreadContext._principal = Thread.CurrentPrincipal;
callerThreadContext._context = Thread.CurrentContext;
return(callerThreadContext);
}
/// <summary>
/// Applies the thread context stored earlier
/// </summary>
/// <param name="callerThreadContext"></param>
public static void Apply(ChoCallerThreadContext callerThreadContext)
{
Thread thread = Thread.CurrentThread;
thread.CurrentCulture = callerThreadContext._culture;
thread.CurrentUICulture = callerThreadContext._cultureUI;
Thread.CurrentPrincipal = callerThreadContext._principal;
// Uncomment the following block to enable the Thread.CurrentThread
/*
* if (null != _fieldInfo)
* {
* _fieldInfo.SetValue(
* Thread.CurrentThread,
* callerThreadContext._context);
* }
*/
}
/// <summary>
/// Initialize the callback holding object.
/// </summary>
/// <param name="callback">Callback delegate for the callback.</param>
/// <param name="state">State with which to call the callback delegate.</param>
///
/// We assume that the WorkItem object is created within the thread
/// that meant to run the callback
public WorkItem(
WorkItemCallback callback,
object state,
bool useCallerContext,
PostExecuteWorkItemCallback postExecuteWorkItemCallback,
CallToPostExecute callToPostExecute)
{
if (useCallerContext)
{
_callerContext = ChoCallerThreadContext.Capture();
}
_postExecuteWorkItemCallback = postExecuteWorkItemCallback;
_callToPostExecute = callToPostExecute;
_callback = callback;
_state = state;
_workItemState = WorkItemState.InQueue;
_workItemCompleted = null;
_workItemCompletedRefCount = 0;
_workItemResult = new WorkItemResult(this);
}
