private void SpotFeedRequestCallback( IAsyncResult ar )
{
Thread.MemoryBarrier( );
var asyncChainedState = ( AsyncChainedState<TrackerState> ) ar.AsyncState;
try
{
TrackerState result = this.currentRequest.EndRequest( ar );
if ( result.Error != null )
LogFailedRequestEnd( asyncChainedState, result );
bool needContinue = false;
if ( result.Error == null ||
result.Error.Type == Data.ErrorType.ResponseHasNoData )
{ // Might be there is a result from the prev.pages, so try to merge it:
result = MergeWithExistingData( result, out needContinue );
// If it was an error with ResponseHasNoData, but there were data from the prev.pages,
// then now result has Error == null.
}
bool isSubsequentRequestStarted = false;
if ( result.Error == null )
{
if ( !needContinue )
{
LogSuccRequestEnd( asyncChainedState );
}
else
{
this.currentRequest =
new SpotFeedRequest(
this.Id,
this.currentRequest.Page + 1,
asyncChainedState.Id,
this.consequentErrorsCounter == null
? null
: this.consequentErrorsCounter.UnexpectedForeignErrorsCounter
);
// If isAborted but we're here then "bad" (timed out?) request was finished and closed.
if ( !this.isAborted )
{
this.currentRequest.BeginRequest( SpotFeedRequestCallback, asyncChainedState );
isSubsequentRequestStarted = true;
}
}
}
if ( !isSubsequentRequestStarted )
asyncChainedState.SetAsCompleted( result );
}
catch ( Exception exc )
{
asyncChainedState.SetAsCompleted( exc );
}
}
public TestLocationRequest( RequestParams requestParams, string testXml )
: base(requestParams)
{
this.spotFeedRequest = new SpotFeedRequest( requestParams.Id, testXml, -1 );
}
public override IAsyncResult BeginReadLocation( AsyncCallback callback, object state )
{
lock ( this.sync )
{
if ( this.inCall )
throw new InvalidOperationException( "BeginReadLocation has already been called for this instance" );
this.inCall = true;
}
var asyncChainedState = new AsyncChainedState<TrackerState>( callback, state );
Lrid = asyncChainedState.Id;
this.currentRequest =
new SpotFeedRequest(
this.Id,
0,
asyncChainedState.Id,
this.consequentErrorsCounter == null
? null
: this.consequentErrorsCounter.UnexpectedForeignErrorsCounter
);
Log.InfoFormat( "Created request for {0}, lrid {1}", this.Id, asyncChainedState.Id );
this.currentRequest.BeginRequest( SpotFeedRequestCallback, asyncChainedState );
return asyncChainedState.FinalAsyncResult;
}
