Last reviewed: 12/2/2009
Article ID: H090809
HOW: Tracking API errors
The information in this article applies to:
- GrammarKit 3
- LexiconKit 3
- ProfileKit 3
- SpeechKit 6
- VoiceMarkupKit 3
The GrammarKit (ChantGM), ProfileKit (ChantPM), SpeechKit (ChantAudio, ChantSR, and ChantTTS), and VoiceMarkupKit (ChantVM) components isolate the application from many low-level API issues by design. However, API transparency may make for difficult debugging in cases where the problem is unclear.
A new callback event is available to return API errors directly to the application.
CCAPIError ChantCallback constant is available to register for API error events. This provides a way to track API error conditions and debug API- or engine-specific problems.
The CCAPIError event sets the following event property values:
- ID - return code from the invoking the API function,
- Function - API function invoked that generated the error, and
- Text - error message description if available.
CCAPIError events can be tracked interactively with the Chant Developer Workbench development and testing environment. This provides a comprehensive testing and diagnostic tool for debugging applications.
The following sample illustrates registering for the CCAPIError events:
// Register for the API errors with GrammarKit 3 ChantGM.RegisterCallback(CCAPIError) // Register for the API errors with ProfileKit 3 ChantPM.RegisterCallback(CCAPIError) // Register for the API errors with SpeechKit 6 ChantAudio.RegisterCallback(CCAPIError) ChantSR.RegisterCallback(CCAPIError) ChantTTS.RegisterCallback(CCAPIError) // Register for the API errors with VoiceMarkupKit 3 ChantVM.RegisterCallback(CCAPIError)