Welcome to reka. You can find out a little more at http://nicksellen.github.io/reka.

• runs on JVM, written in Java 8
• build applications as a DAG of operations
• simple DSL for constructing DAG
• client/server architecture, so can deploy to remote server - client part written in golang
• tiny core (519kb jar), everything else implemented in external modules
• fully dogfood'ed - provisioning API and admin UI implemented with reka
• no downtime redeploys for network protocols - [web]socket connections can even be kept open
• available modules in various states of completeness for:
  • network: http, websockets, tcp sockets, ssl
  • email: smtp client/server, imap
  • databases: h2, postgres
  • languages: clojure, ruby (jruby), javascript (nashorn)
  • templating: markdown, mustache, jade
  • other: ssh, child process, irc, jsx
• not suitable for use in production right now.

I'm looking for feedback, inspiration, use cases, thoughts, insults, and cake.

Prequisites:

• java >=8
• maven >=3

If you need to specify special environment, write an env.make file, mine looks like this:

export JAVA_HOME=/usr/lib/jvm/java-8-oracle/
export REKA_ENV=development

make

make run

In the future it might do things like:

• more modules: message queues, more databases, elasticsearch
• modules written in non-JVM languages
• live module reloading via OSGi
• transparent distributed deployment - fundemental architecture totally supports this
• "multi execution" graph architectures - currently each operation is executed once or not at all for a given trigger
• include browser javascript implemention to seamless execute in browser or on backend
• "intellisense"-like service for editors/IDEs
• allow provisioning/configuring of kubernetes/docker instances

Current limitations:

• only single server deployment
• no type verification of data flowing through execution graph
• not good enough solution for error handling yet
• somewhat verbose/complicated to write simple modules in Java
• need documentation on available modules/operations/configuration