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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Testing the pipeline at small scale with DirectRunner
As you work, you want quick feedback about how your pipeline is working. You can run the whole pipeline in a local process using DirectRunner. This is an in-process Java runner that runs extra checks to help ensure that your pipeline will be robust when it is really deployed.
For demonstrating the invocation, we will switch to the more full WordCount example that supports command-line configuration. You can get a project set up to run this by following https://beam.apache.org/get-started/quickstart-java/. For our purposes, run this command:
mvn archetype:generate \
-DarchetypeGroupId=org.apache.beam \
-DarchetypeArtifactId=beam-sdks-java-maven-archetypes-examples \
-DarchetypeVersion=2.2.0 ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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