node-apache-kafka

Sample project to demonstrate NodeJS and Apache Kafka (Windows)

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Table of contents

• Prerequisites
• Configuration
• Running Application
• Project Structure

Prerequisites

Tool	Version
Node JS	8.11.x
kafka	kafka_2.12-2.3.0
zookeeper	zookeeper-3.5.5

Configuration

1. Update kafka server.properties

   /kafka_2.12-2.3.0/config/server.properties

2. Copy zoo_sample.cfg to zoo.cfg and update dataDir (The directory where the snapshot is stored) value

   /zookeeper-3.5.5/conf/zoo.cfg

3. Start ZooKeeper

   Open a command prompt and type zkserver

4. Start kafka service - Under kafka extracted directory

   kafka_2.12-2.3.0 >.\bin\windows\kafka-server-start.bat .\config\server.properties

5. Create two topics (As per configuration /config/config.development.js)

   'TEST_TOPIC' and 'NODE_KAFKA'

   kafka-topics.bat --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic TEST_TOPIC

   kafka-topics.bat --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 --topic NODE_KAFKA

Running Application

1. Under roor directory - Spin up kafka consumers

   node src/index.js

2. To generate message

   node kafka-producers/node_kafka.producer.js

3. Message received at kafka-consumer - NODE_KAFKA

   Log folder : node-apache-kafka/logs/node_topic_out.log

   Output : Message received at NODE_KAFKA. Message [ NODE_KAFKA ]

Project Structure

.
├── node-apache-kafka                                             
|   ├── /config                # Configuration files
|   ├── /kafka-consumers       # Kafka Consumers scripts
|   ├── /kafka-producers       # Kafka Producers scripts
|   ├── /logs                  # Log files
│   |   ├── *_out.log          # Stdout logs
│   |   ├── *.log              # Log
│   |   └── *_err.log          # Stderr logs
|   ├── /src                   # Source scripts
│   |   └── index.js           # Entry point file - _Spin up consumers_
|   ├── /node_modules          # Contains Node packages as specified as dependencies in package.json
│   |   ├── :                  # -|-
│   |   ├── :                  # -|-
│   |   └── :                  # -|-
│   ├── .gitignore             # git configuration to ignore some files and folder
│   ├── package.json           # Standard npm package specification
│   ├── LICENSE                # LICENSE information
└───└── README.md              # **node-apache-kafka** documentation