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Apache ODE

Software information
DeveloperApache Software Foundation
Stable release1.3.5
Latest release dateFebruary 06, 2011
Development statusActive
Written inJava
Operating systemCross-platform
Available inJava
TypeWorkflow engine, Middleware
LicenseApache License 2.0

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Apache ODE (Apache Orchestration Director Engine) 'executes' or 'runs' one or more business process which has been expressed in the Web Services Business Process Execution Language (WS-BPEL). It principally communicates with one or more Web service, sending and receiving messages, manipulating data and handling exceptions ('errors') as defined by any given process. The engine is capable of running both long and short living processes to coordinate all the services which make up a service or application (orchestration).

WS-BPEL itself is based upon the XML language and includes a number of ways in which business processes can be expressed. These include conditional clauses, repeating loops, calls to web services and the exchange of messages. Where interfaces with web services are required, it makes use of Web Services Description Language (WSDL) to express them. Messages can be handled in a flexible way by reading either part or all of the message into variables, which can then be used for onward communication.

The engine has two communication layers, with which it interacts with the outside world. :

* Apache Axis2 integration layer: supports the communication over Web services.

* Layer based on the JBI standard: supports communication via JBI messages.

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