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Lesson 2: Expect Classifiers To Do Less
The initial API was powerful, but required extensive customization in classifiers (incremental classification, etc.)
Solution: Only rely on typical features, such as:
- Read a message
- Write a filtered version of the message
- Perform some header gymnastics
Send TarProxy-specific metatokens to classifiers via header insertion.
Neat Side Effect: Immediate availability of compatible classifiers.
* CORRECTION: After I gave this presentation, I was contacted by Dr. John Graham-Cumming, author of POPFile, and informed that the current version of POPFile does in fact support incremental classification!