keedio / Storm-filterkey-bolt

This bolt operates filtering data from stream of tuples, according a mapped list of crterias specified in Topology's config

Storm-filterkey-bolt

This bolt operates filtering data from a stream of tuples according a mapped list of crterias specified in Topology's config. The tuple contains a JSON object with two fileds: "extraData" and "message". The value of the second one will never be modified, but will be propagated to next bolt. The value of the first one, this is, "extraData", contains another Json composed of pairs of keys and values intended to be a tag or header for the message. The main goal of this bolt is to reduce the number of pairs in the "extraData". To acomplish, list of criterias must be supplied in Topology's file config, as a list of mapped criterias.

Example:

the tuple received may contains this data:

{ "extraData":{"Name": "Peter", "Age":"33", "City": "London", "Country": "UK"}, "message": "the original body string" }

Just need this information:

 key.selection.criteria.1 = {"key":{"Name":"Peter"},"values":["City"]}" );

the propagated information to next bolt into topology is:

{ "extraData":{"Name": "Peter","City": "London"} "message": "the original body string" }

Dependecies:

guava-18.0.jar

Version history

0.0.1

License

Apache License, Version 2.0 http://www.apache.org/licenses/LICENSE-2.0

www.keedio.org Luis Lázaro [e-mail]