onobc / stream-applications

Functions and Spring Cloud Stream Applications for data driven microservices

Stream Applications

In this repository, you will find a collection of components that can meet various data integration use cases and requirements.

This repository builds on top of the Spring Functions Catalog and generates standalone Spring Cloud Stream applications that can run against Spring Cloud Stream’s RabbitMQ or Apache Kafka binder implementations. It is also possible to extend the generator to bundle the Java functions with the other supported binder implementations.

These applications can run standalone or as part of a data flow, such as the one orchestrated using Spring Cloud Data Flow.

Project Structure

The following are the various components of this repository.

• Common Core Components for Applications

• Spring Cloud Stream Applications

• Build Parent

• Release Train

Reusable Spring Cloud Stream Applications

Source	Processor	Sink
Debezium supplier	Aggregator	Analytics
File	Bridge	Cassandra
FTP	Filter	Elasticsearch
	Groovy	File
HTTP	Header-Enricher	FTP
JDBC	HTTP Request
JMS		JDBC
Load-Generator		Log
Mail		MongoDB
MongoDB		MQTT
MQTT	Script	Pgcopy
RabbitMQ	Splitter	RabbitMQ
AWS S3	Transform	Redis
SFTP	Twitter Trend	Router
Syslog		RSocket
TCP		SFTP
Time
Twitter Message		TCP
Twitter Search		Throughput
Twitter Stream		Twitter Message
Websocket		Twitter Update
XMPP		Wavefront
		Websocket
		XMPP

Build

This build requires GraalVM JDK 17 distribution in order to build the script function and processor.

If you are building locally and don’t want to publish to a repository set: export LOCAL=true

Quick Compile

This will compile all jars and publish to local repo.

./quick-compile.sh

Boil the Ocean

This will build and test / integration test all the modules.

./full-build-test.sh

Core

This will build the core functionality and all functions.

./build-core.sh

You can then build the desired apps.

Application

./build-app.sh . applications/sink/log-sink

Note	In order to disable metrics by default there needs to be application properties configured like in default-application.properties. The build-app.sh script will copy default-application.properties into src/main/resources if no application.properties,yml,yaml or json is present.

Additional Resources

Here is a list of resources where you can find out more about using and developing functions and stream applications:

• Function Composition

• Contributing a New Function or Application to this Repository

Code of Conduct

Please see our Code of Conduct