#Spring Cloud Stream Consumer ###Spring Cloud Stream

• This is a Spring framework that enables application developers to write event-driven applications that use the strong foundations of Spring Boot and Spring Integration.
• The underpinning of all these is the binder implementation, which is responsible for communication between the application and the message broker.
• These binders are "MessageChannel"-based implementation.

###Apache Kafka

• This is an open-source distributed even streaming platform used by thousands o companies for high-performance data pipelines, streaming analytics, data integration, and mission-critical applications.

###Zookeeper

• This is an important part of Apache Kafka. Zookeeper is a cornerstone for so many distributed applications, as it provides fantastic features.
• Zookeeper is used by Kafka to store information regarding the Kafka cluster, as well as user info, in short, we can say Zookeeper store metadata about the kafka cluster.

###How to Run

1. start ZooKeeper server locally from Command Prompt (not Git Bash)
   • ..bin\windows>zookeeper-server-start.bat ....\config\zookeeper.properties
2. start Kafka server locally from Command Prompt (not Git Bash)
   • ..bin\windows>kafka-server-start.bat ....\config\server.properties
3. create Topic
   • ..bin\windows>kafka-topics.bat --create --zookeeper localhost:2181 --replication-factor 1 --partitions 1 -topic dummytopic
4. list all available topics
   • ..bin\windows>kafka-topics.bat --list --zookeeper localhost:2181
5. Start Spring-Cloud-Stream-Publisher producer microservice
6. Start Spring-Cloud-Stream-Consumer microservice
7. Open up Postman, and hit the /publish endpoint in the producer
   • POST: http://localhost:8080/publish BODY: {"id":1, "name": "dummy"}