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README.md

ewarp: Erlang WAR packager

Package Erlang apps as Java WAR file with an embedded Erjang runtime. The WAR file can be run on any standard Java servlet container, such as Tomcat or Jetty. Deployment in the cloud (PaaS) is easy using a WAR file. Popular options are Amazon Elastic Beanstalk and CloudFoundry. The Erlang app does not necessarily need to be Web-aware, the servlet container simply acts as a convenient and standardized runtime container, which is provided by many (cloud) hosting providers.

This project is currently work in progress.

Planned feature set:

  • Single script call to create a WAR file from a simple Erlang app. Possibly integration with rebar
  • Many customization options
  • Automatic cluster management in cloud environments via customizable NodeFinders. Example: all nodes in a Elastic Beanstalk environment can be found via the Amazon EC2 and Beanstalk APIs and are automatically made known
  • Full access to the Java world and additional libraries/frameworks
  • Java-Erlang web bridge
  • Triggering of Erlang functions on startup/shutdown/specified web calls

How to use

Note: as this is work in progress, there are not yet full instructions...

  1. Get and build Erjang from GitHub:

    git clone https://github.com/trifork/erjang.git
    cd erjang
    ant jar otpjar
    
  2. Get and build ewarp from GitHub: Build using Gradle, which is downloaded automatically, when called as ./gradlew

    git clone https://github.com/jetztgradnet/ewarp.git
    cd ewarp
    ./gradlew war
    
  3. Upload the created .WAR-file (build/libs/ewarp-0.1.war) to your Servlet container (e.g. Tomcat or Jetty) The Gradle-based build allows to run the WAR file inline using the following command:

    ./gradlew jettyRun
    
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