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DALiuGE Application Component Developers Guide

This chapter describes what developers need to do to write a new application component that can be used as an Application Drop during the execution of a DALiuGE graph.

Detailed instructions can be found in the respective sections for each type of components. There are also separate sections describing integration and testing during component development. As mentioned already, for more complex and serious component development we strongly recommend to use the component development template we are providing, please refer to chapter Template Primer for more details. Most of the following sub-sections of this documentation are based on the usage of the template.

NOTE: The DALiuGE Component Developers Guide is work in progress!

• Bash Components
  • ‘Hello World’ in Bash through EAGLE
  • Verification
  • Treatment of Command Line Parameters
  • Advanced Bash Components
• Python Components
  • Basic development method
  • Test Driven Development workflow
  • Remove boilerplate and add your documentation
  • Adding Parameters and App Arguments
  • Adding Input and Output Ports
  • Consider Granularity and Parallelism
• Specialized Components
• Built-in Application Components
• Dynlib Components
• Docker Components
• Service Components
• Pyfunc Components
  • Port Parsers
• DataDROP I/O
  • Serialization
• Wrap Existing Code
• Test And Debug
• Component Description Generation
  • Automatic EAGLE Palette Generation
  • Manual EAGLE Palette Generation
• Deployment Testing