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Dahu: Data Analysis RPC server over Tango

Software chunks initially developped for ID02 upgrade program in 2012-2014.

Dahu is a lightweight plugin based framework...
... technically a JSON-RPC server over Tango:
  • plugins can be class or can be generated from any state-less function written in Python
  • a plugin is executed within a job, each job lives in its own thread.
  • plugins have empty constructors plus 4 methods (or more)
  • setup allows to set the input parameters. Sanitization is performed here.
  • process does the work.
  • teardown sets the output, the logging and cleans up (if needed).
  • abort can be used to stop the processing if a plugin is a daemon.
  • the job is responsible for serializing on disk of the plugin's input and output
  • jobs can be launched using the tango interface (or other ...)
  • plugins have a single input and output, they are simple JSON-serializable dictionaries.