September 2017
Beginner to intermediate
360 pages
8h 13m
English
book
Practical Real-time Data Processing and Analytics
by Shilpi Saxena, Selva raj Ramasamy, Prateek Bhati, Saurabh Gupta
Content preview from Practical Real-time Data Processing and Analytics
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Aggregate
Each batch of the tuple is aggregated in isolation. In aggregates the process, initially tuples are repartitioned using global grouping. We will discuss grouping in the next section in detail:
stream.aggregate(new Count(), new Fields("count"))
The preceding statement will give the count of a batch.
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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.