/// <summary>
/// Initializes a new instance of the <see cref="PipelineEventArgs"/> class.
/// </summary>
/// <param name="message">The pipe message.</param>
/// <param name="pipeline">The pipeline.</param>
/// <param name="pipeFilter">The pipe filter.</param>
/// <param name="exception">The exception.</param>
public PipelineEventArgs(PipeMessage message, Pipeline pipeline, IPipeFilter pipeFilter, Exception exception = null)
{
this.Message = message;
this.Pipeline = pipeline;
this.PipeFilter = pipeFilter;
this.InnerException = exception;
}
/// <summary>
/// Method RaiseEvent.
/// </summary>
/// <param name="eventHandler">Instance of EventHandler.</param>
/// <param name="message">The pipe message.</param>
/// <param name="pipeFilter">The pipe filter.</param>
/// <param name="exception">The exception.</param>
private void RaiseEvent(EventHandler <PipelineEventArgs> eventHandler, PipeMessage message, IPipeFilter pipeFilter, Exception exception = null)
{
// Copy a reference to the delegate field now into a temporary field for thread safety.
EventHandler <PipelineEventArgs> temp = Interlocked.CompareExchange(ref eventHandler, null, null);
if (temp != null)
{
temp(this, new PipelineEventArgs(message, this, pipeFilter, exception));
}
}
/// <summary>
/// Initializes a new instance of the <see cref="PipeMessage"/> class.
/// </summary>
/// <param name="originalMessage">The original message.</param>
private PipeMessage(PipeMessage originalMessage)
{
this.Id = originalMessage.Id;
this.CreatedAt = originalMessage.CreatedAt;
this.SentAt = originalMessage.SentAt;
this.ReceivedAt = originalMessage.ReceivedAt;
this.LastPipeline = originalMessage.LastPipeline;
this.LastFilter = originalMessage.LastFilter;
this.Value = originalMessage.Value;
this._bodyObject = originalMessage._bodyObject;
this._properties = originalMessage._properties;
}
/// <summary>
/// Occurs after the filter processed message.
/// </summary>
/// <param name="filter">The filter done processed message.</param>
/// <param name="message">The output message.</param>
protected virtual void AfterFilterProcessed(IPipeFilter filter, PipeMessage message)
{
}
/// <summary>
/// Occurs before the filter processing message.
/// </summary>
/// <param name="filter">The filter going to process message.</param>
/// <param name="message">The input message.</param>
protected virtual void BeforeFilterProcessing(IPipeFilter filter, PipeMessage message)
{
}
/// <summary>
/// Occurs after the pipeline processed message.
/// </summary>
/// <param name="message">The output message.</param>
protected virtual void AfterPipelinePumped(PipeMessage message)
{
}
/// <summary>
/// Occurs before the pipeline processing message.
/// </summary>
/// <param name="message">The input message.</param>
protected virtual void BeforePipelinePumping(PipeMessage message)
{
}
/// <summary>
/// Pumps the specified input PipeMessage to the pipeline and start to process.
/// </summary>
/// <param name="input">The input PipeMessage.</param>
/// <returns>The final PipeMessage output.</returns>
public PipeMessage Pump(PipeMessage input)
{
var nextInput = input.Clone();
nextInput.ReceivedAt = DateTime.Now;
nextInput.SentAt = nextInput.ReceivedAt;
nextInput.LastPipeline = this.Name;
nextInput.LastFilter = null;
this.RaiseEvent(this.PipelinePumping, nextInput, null);
this.BeforePipelinePumping(nextInput);
lock (Utilities.GetSyncRoot(this._filterChain))
{
try
{
foreach (var filter in this._filterChain)
{
try
{
var receivedAt = DateTime.Now;
nextInput.ReceivedAt = receivedAt;
nextInput.LastPipeline = this.Name;
this.RaiseEvent(this.FilterProcessing, nextInput, filter);
this.BeforeFilterProcessing(filter, nextInput);
var output = filter.Process(nextInput);
output.ReceivedAt = receivedAt;
output.SentAt = DateTime.Now;
output.LastPipeline = this.Name;
output.LastFilter = filter.Name;
this.AfterFilterProcessed(filter, output);
nextInput = output.Clone();
this.RaiseEvent(this.FilterProcessed, output, filter);
}
catch (Exception e)
{
InternalLogger.Log(e);
this.RaiseEvent(this.ErrorOccurred, nextInput, filter, e);
throw;
}
}
}
catch (Exception e)
{
InternalLogger.Log(e);
this.RaiseEvent(this.ErrorOccurred, nextInput, null, e);
throw;
}
}
this.AfterPipelinePumped(nextInput);
var result = nextInput.Clone();
this.RaiseEvent(this.PipelinePumped, nextInput, null);
return(result);
}
