Possible to return property/value/state from a flow?

[PaulON]

Hey,

is is possible to set a value/property (not a tuple) with a flow and then access it outside of the flow?

We are trying to log when an even happens within a flow so we can take specific action outside of cascading.

We could do it by having specific counters for each event type, but was hoping for an nicer approach?

I see flow.getProperty() but since there is no corresponding setProperty() I guess these are immutable job properties?

Cheers!

P.

[Ken Krugler]

Those are one-way (into the job).

And yes, as far as I know using counters is the easiest approach that works.

For specific situations in the past we’ve added a field to an operation’s output tuple that records (rare) events, and is null most of the time.

Then you can partitioned (or split) on that, but in general counters have been Good Enough.

— Ken

--------------------------

Ken Krugler

+1 530-210-6378

http://www.scaleunlimited.com

custom big data solutions & training

Hadoop, Cascading, Cassandra & Solr

[Andre Kelpe]

Flow.getProperty resolves settings that have been determined at plan
time. There is no mechanism to set a property cluster side and have it
show up on the client side. The only exception are counters, since
those are provided by the underlying platform as a way to communicate
things back.

- Andre

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André Kelpe
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