November 2017
Beginner to intermediate
290 pages
7h 34m
English
book
Learning Apache Apex
by Ananth Gundabattula, Thomas Weise, Munagala V. Ramanath, David Yan, Kenneth Knowles
Content preview from Learning Apache Apex
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Enrichment
Often, it is necessary to transform incoming tuples by adding new fields to them. As an example, an incoming transaction may contain a customer ID and the corresponding customer name or address should be added from a lookup source. The enricher operator essentially joins a stream with a lookup source and supports lookup from files or JDBC source (Loader) as well as from custom sources.
Lookups are cached. Input and output stream schema are configured with the POJO class and the operator will transform the incoming objects by adding fields from the lookup source. Here are some useful links:
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.