[BEAM-14320] Update programming-guide w/Java GroupByKey example

• Type: Task
• Status: Resolved
• Priority: P3
• Resolution: Done
• Fix Version/s: Not applicable
• Component/s: website
• Labels: apache-beam stale-assigned website

Language

English Java

• Assignee: Denise Case
• Reporter: Denise Case
• Created: 18/Apr/22 17:05
• Updated: 28/May/22 19:05
• Resolved: 28/May/22 19:05

Description

Minor addition to assist new users with a GroupByKey example in Java. Specifically:

Add the following content to provide a Java example at the end of section 4.2.2. GroupByKey.

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

Using GroupByKey is straightforward:

< highlight java >
// The input PCollection.
PCollection<KV<String, String>> mapped = ...;

// Apply GroupByKey to the PCollection mapped.
// Save the result as the PCollection reduced.
PCollection<KV<String, Iterable>> reduced =
mapped.apply(GroupByKey.<String, String>create());

{\{< /highlight >}

}

Issue Links

• links to: GitHub Pull Request #17369