Simple Proof of Concept to show Apache Kafka and Neo4j

Requirements

• Java 8
• Gradle
• Access to Maven packages in the build.gradle
• Apache Kafka, Apache ZooKeeper, and Neo4j running (Dockerfile coming soon)

Fake Producing data into Kafka

• Fake authors and posts data is provided in the resources/fake/data.json
• Producer.java produces the fake data on a particular topics, and key

Getting Started

• Check out Main.java and the Helpful CLI Commands section below.

Consumers

• Coming Soon!
• Test a Consumer via CLI:

kafka-console-consumer --bootstrap-server 127.0.0.1:9092 --topic author_topic --group group_cli --from-beginning

{"id":"A","firstName":"fnameA","lastName":"lnameA"}
{"id":"B","firstName":"fnameB","lastName":"lnameB"}
{"id":"C","firstName":"fnameC","lastName":"lnameC"}

Helpful CLI Commands below

Spawn ZooKeeper, default configuration, on port 2181

zookeeper-server-start config/zookeeper.properties

Spawn Kafka, defaulting configuration, on port 9092

kafka-server-start config/server.properties

Create Topics we need (running locally for 1 replication factor)

Create the Author Topic.

kafka-topics --zookeeper 127.0.0.1:2181 --topic {AUTHOR_TOPIC} --create --partitions 6 --replication-factor 1

Create the Post Topic.

kafka-topics --zookeeper 127.0.0.1:2181 --topic {POST_TOPIC} --create --partitions 6 --replication-factor 1

• {AUTHOR_TOPIC} - default is author_topic
  • The default key that will be published to is in the form id_{AUTHOR_ID}
• {POST_TOPIC} - default is post_topic