Harbinger

The proof-of-concept library for loading and executing scripts in runtime.

Getting started

clone this project and build via maven

mvn -U clean install

Run ExampleRunner class to see example. Used ini files is example.ini and example2.ini

Run ReloadExampleRunner to see how reloading works. Used ini file is reloadable.ini

Test your snippets after changing

mvn test

Concept

Given:

• An ini-style file with numbers as keys and java source code or keywords as values

Requirements:

• Ability to reload scripts in runtime
• Divide huge blocks of code into small files
• Ability to test these files
• Be able to use simple precompiled processors such as copy value processor

Used tech

• Groovy language to compile, load and reload files into metaspace
• Byte-buddy to create Processor interface implementations on-the-fly
• Spock to test processors

ToDo List

• Cover with tests
• Think about one more dimension for scripting to have several methods in one processor

Links

• Serverless for the poor
• Byte Buddy
• Integrating groovy into applications
• Attempt to implement loadable groovy scripts over REST
• Spock framework