I need to extract a value from a PySpark structured streaming Dataframe to a string variable to check something. 

I tried this code. 

agentName = kinesisDF.select(kinesisDF.agentName.getItem(0).alias("agentName")).collect()[0][0]

This works on a non-streaming Dataframe only. In a streaming Dataframe, collect is not supported. 

Any workaround for this?

Nick