It's the same batch ID already, no?
Or why not simply put the logic of both in one function? or write one
function that calls both?
On Sat, Mar 4, 2023 at 2:07 PM Mich Talebzadeh <mich.talebza...@gmail.com>
wrote:
>
> This is probably pretty straight forward but somehow is does not look
> that way
>
>
>
> On Spark Structured Streaming, "foreachBatch" performs custom write logic
> on each micro-batch through a call function. Example,
>
> foreachBatch(sendToSink) expects 2 parameters, first: micro-batch as
> DataFrame or Dataset and second: unique id for each batch
>
>
>
> In my case I simultaneously read two topics through two separate functions
>
>
>
> 1. foreachBatch(sendToSink). \
> 2. foreachBatch(sendToControl). \
>
> This is the code
>
> def sendToSink(df, batchId):
> if(len(df.take(1))) > 0:
> print(f"""From sendToSink, md, batchId is {batchId}, at
> {datetime.now()} """)
> #df.show(100,False)
> df. persist()
> # write to BigQuery batch table
> #s.writeTableToBQ(df, "append",
> config['MDVariables']['targetDataset'],config['MDVariables']['targetTable'])
> df.unpersist()
> #print(f"""wrote to DB""")
> else:
> print("DataFrame md is empty")
>
> def sendToControl(dfnewtopic, batchId2):
> if(len(dfnewtopic.take(1))) > 0:
> print(f"""From sendToControl, newtopic batchId is {batchId2}""")
> dfnewtopic.show(100,False)
> queue = dfnewtopic.first()[2]
> status = dfnewtopic.first()[3]
> print(f"""testing queue is {queue}, and status is {status}""")
> if((queue == config['MDVariables']['topic']) & (status ==
> 'false')):
> spark_session = s.spark_session(config['common']['appName'])
> active = spark_session.streams.active
> for e in active:
> name = e.name
> if(name == config['MDVariables']['topic']):
> print(f"""\n==> Request terminating streaming process for
> topic {name} at {datetime.now()}\n """)
> e.stop()
> else:
> print("DataFrame newtopic is empty")
>
>
> The problem I have is to share batchID from the first function in the
> second function sendToControl(dfnewtopic, batchId2) so I can print it
> out.
>
>
> Defining a global did not work.. So it sounds like I am missing something
> rudimentary here!
>
>
> Thanks
>
>
> view my Linkedin profile
> <https://www.linkedin.com/in/mich-talebzadeh-ph-d-5205b2/>
>
>
> https://en.everybodywiki.com/Mich_Talebzadeh
>
>
>
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