/// <summary>
/// Dispatches work into appropriate handler passing through filters.
/// The default implementation processes requests on the calling thread and disposes WorkContext deterministically
/// </summary>
public virtual void Dispatch(WorkContext work)
{
WorkFilter filter = null;
WorkHandler handler = null;
try
{
var filters = m_Filters.OrderedValues.ToList().AsReadOnly();//captures context
filter = filters.FirstOrDefault();
if (filter != null)
{
filter.FilterWork(work, filters, 0);
}
else
{
InvokeHandler(work, out handler);
}
}
catch (Exception error)
{
work.LastError = error;
HandleException(work, filter, handler, error);
}
finally
{
try
{
if (!work.NoDefaultAutoClose)
{
work.Dispose();
}
}
catch (Exception error)
{
HandleException(null, null, null, error);
}
}
}
public FilterPipelineException(WorkFilter filter, Exception inner) : base(inner.Message, inner)
{
Filter = filter;
}
/// <summary>
/// Unregisters filter and returns true if the named instance has been removed
/// Note: it is possible to call this method on active server that is - remove filters while serving requests
/// </summary>
public bool UnRegisterFilter(WorkFilter filter)
{
if (filter==null) return false;
if (filter.Dispatcher!=this.Dispatcher)
throw new WaveException(StringConsts.WRONG_DISPATCHER_FILTER_UNREGISTRATION_ERROR.Args(filter));
return m_Filters.Unregister(filter);
}
/// <summary>
/// Handles processing exception by calling ErrorFilter.HandleException(work, error).
/// All parameters except ERROR can be null - which indicates error that happened during WorkContext dispose
/// </summary>
public virtual void HandleException(WorkContext work, WorkFilter filter, WorkHandler handler, Exception error)
{
try
{
if (m_InstrumentationEnabled) Interlocked.Increment(ref m_Stat_ServerHandleException);
//work may be null (when WorkContext is already disposed)
if (work!=null)
ErrorFilter.HandleException(work, error, m_ErrorShowDumpMatches, m_ErrorLogMatches);
else
Log(MessageType.Error,
StringConsts.SERVER_DEFAULT_ERROR_WC_NULL_ERROR + error.ToMessageWithType(),
"HandleException()",
error);
}
catch(Exception error2)
{
if (m_LogHandleExceptionErrors)
try
{
Log(MessageType.Error,
StringConsts.SERVER_DEFAULT_ERROR_HANDLER_ERROR + error2.ToMessageWithType(),
"HandleException.catch()",
error2,
pars: new
{
OriginalError = error.ToMessageWithType()
}.ToJSON()
);
}
catch{}
}
}
public FilterPipelineException(WorkFilter filter, Exception inner) : base(inner.Message, inner)
{
Filter = filter;
}
/// <summary>
/// Handles processing exception - this implementation uses server-wide behavior.
/// All parameters except ERROR can be null - which indicates error that happened during WorkContext dispose
/// </summary>
public virtual void HandleException(WorkContext work, WorkFilter filter, WorkHandler handler, Exception error)
{
ComponentDirector.HandleException(work, filter, handler, error);
}
