[GitHub] [pulsar] wolfstudy edited a comment on issue #5520: Missing documentation for window functions

[GitBox <gi...@apache.org>]

wolfstudy edited a comment on issue #5520: Missing documentation for window functions
URL: https://github.com/apache/pulsar/issues/5520#issuecomment-550707625
 
 
   Sorry, I missed this message.
   
   > But I'd still like to see documentation for what windowing is supposed to do :-)
   
   @candlerb Currently, does not support `window function` in Python Function. 
   
   ```
   private static void doPythonChecks(FunctionConfig functionConfig) {
           if (functionConfig.getProcessingGuarantees() == FunctionConfig.ProcessingGuarantees.EFFECTIVELY_ONCE) {
               throw new RuntimeException("Effectively-once processing guarantees not yet supported in Python");
           }
   
           if (functionConfig.getWindowConfig() != null) {
               throw new IllegalArgumentException("There is currently no support windowing in python");
           }
   
           if (functionConfig.getMaxMessageRetries() != null && functionConfig.getMaxMessageRetries() >= 0) {
               throw new IllegalArgumentException("Message retries not yet supported in python");
           }
       }
   ```

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