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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Application configuration
The application is configured via the properties.xml file, in the resources/META-INF directory, and includes the following elements:
- The Kafka input topic
- The Kafka broker address and port
- A schema of input records and its name
- A schema of output records and its name
- The SQL query used to filter and project
- The output filename
- The output directory
The first two are straightforward:
<property>
<name>apex.operator.KafkaInput.prop.topics</name>
<value>ETLTopic</value>
</property><property>
<name>apex.operator.KafkaInput.prop.clusters</name>
<value>localhost:9092</value> <!-- broker (NOT zookeeper) address -->
</property>
The topics property of the KafkaInput operator defines the topic for input records, and the ...
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