Spring Cloud Stream Applications


Spring Cloud Stream Applications are standalone executable applications that communicate over messaging middleware such as Apache Kafka and RabbitMQ.

These applications can run independently on a variety of runtime platforms, including Kubernetes, Docker, Cloud Foundry, or even on your laptop.


  • Out-of-the-box applications ready to run as standalone Spring Boot applications.

  • Assemble a set of applications into a coherent streaming data pipeline in Spring Cloud Data Flow.

  • Override configuration parameters via application properties, environment variables, or in the YAML file.

Quick Start

Step 1 - Download the latest time-source application from here [eg: /3.0.0-SNAPSHOT/time-source-kafka-3.0.0-SNAPSHOT.jar]

Step 2 - Download the latest log-sink application from here [eg: /3.0.0-SNAPSHOT/log-sink-kafka-3.0.0-SNAPSHOT.jar]

Step 3 - Start Kafka

Step 4 - Start the Time Source producer application pointing to ticktock topic in Kafka

java -jar time-source-kafka-***.jar

Step 5 - Start the Log Sink consumer application pointing to ticktock topic in Kafka

java -jar log-sink-kafka-***.jar

Step 6 - Verify ticktock output in the log-sink logs

HTTP Repository Location for Apps

Versions: Boot / Stream

Rabbit MQ

Apache Kafka

Spring Boot 2.3.x / Spring Cloud Stream 3.0.x

Stable Release / Latest Snapshot

Stable Release / Latest Snapshot

Spring Initializr

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Each Spring project has its own; it explains in great details how you can use project features and what you can achieve with them.
2020.0.1 CURRENT GA Reference Doc. API Doc.
2020.0.0 GA Reference Doc. API Doc.
2020.0.0-SNAPSHOT SNAPSHOT Reference Doc. API Doc.