Hi all, Since last year we have been talking on improving airavata workflow component to support latest airavata feature improvements. With the effort of last few months we could able to re energize the workflow component and make it work with the latest Airavata. As a results of that effort we replaced XML based XWF language with JSON based workflow language. Latest Airavata 0.14 release has the all improvements and it supports workflow execution with monitoring.
By looking at the workflow component, it is overloaded with deprecated and unused subcomponents like xsd, WSDL handlers, web services, cloud specific code, and lots of JAXB codes which are deprecated with new JSON based language replacement. Another major minus point to the existing workflow component is, workflow data model is bound with xbaya gui tool. So this limit the support of different workflow languages. Here[1] I am suggesting a new architecture for the workflow component, With this new solution we can provide a clean API to plug different workflow languages to workflow engine and decouple workflow data model with workflow description language. As the first iteration of implement, we can come up with basic features to run a workflow which doesn't have loops or conditional states. Future iterations can extend the workflow engine to support complex scenario like conditional states, optimize resources utilization of workflow process and workflow debugging. I have given permission to comment on the doc. All comments and suggestions are welcome. [1] https://docs.google.com/document/d/1ZpnB3G1L0pR86IHiRrp_0EzSZoTgTxDXCdmS5wK1Ft0/edit -- Best Regards, Shameera Rathnayaka. email: shameera AT apache.org , shameerainfo AT gmail.com Blog : http://shameerarathnayaka.blogspot.com/
