EasyViper Overview

EasyVIPER is a generic workflow engine. VIPER stands for VIrtual Process Engine with Reconfiguration.
Indeed its architecture is based on Frascati, a component-based framework following the SCA standard allowing to reconfigure the engine and workflows at runtime.

It is mainly used in relationship with EasyBPEL but is able to accept any upper model managing processes execution.

The following SCA schema represents the main components and services provided by EasyVIPER.

EasyVIPER main components SCA model.

The EasyVIPER main component is the Workflow engine component that receives and sends messages coming from and going to an external environment. The external environment component is an abstract component dedicated to external / internal messages conversion. The abstract model component is an abstract component dedicated to workflow model management (when there is one), that is to say, a model registry and a model compilation module.

EasyVIPER is a SCA-based application, using Frascati implementation.
It's basically a library allowing to build services-oriented workflows where nodes of the execution graph are SCA components.
The main component that manages these workflows are the Workflow engine.

Moreover, as EasyVIPER is intended to be used in a concomitant way with a workflow model, a SCA component for an abstract model has been designed. This model component can be implemented by various specifications (BPEL, XPDL, BPMN, ...) provided that a registry of model instances and a compiler are developed.

Finally the external environment component is in charge of messages sending and arrival, and their conversion between internal (EasyVIPER) and external (JBI, SOAP, ...) environment.

Frascati is developped by the INRIA team Adam. EasyVIPER and EasyBPEL have been made SCA-based thanks to their help and we would like to thank them.

Moreover, these libraries are used in the Frascati BPEL engine implementation.

If you want know how to use EasyViper library, please consult the list of How-tos.
If you have any questions, please use the [EasyViper contact form|Contact].

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