javaorchestrationsoa
What are the responsibilities of an Orchestration engine vs a Message Driven System.
If I have to build a system which have to string together different independent components(cross-technology/platform components which need not expose a web service end point), which is the toolset to be chosen?
Is there a better option?
If you really want to decouple web app and engine,you can also deploy the engine in a different server and expose the API as web service calls (WS-* or REST).
Basic technologies (such as XML, SOAP, WSDL) provide means to describe, locate, and invoke services as an entity in its own right. However, these technologies do not give a rich behavioral detail about the role of the service in more complex collaboration. This collaboration includes a sequence of activities and relationships between activities, which build the business process. There are two ways to build this process: service orchestration and service choreography.
Service orchestration represents a single centralized executable business process (the orchestrator) that coordinates the interaction among different services. The orchestrator is responsible for invoking and combining the services.
The relationship between all the participating services are described by a single endpoint (i.e., the composite service). The orchestration includes the management of transactions between individual services. Orchestration employs a centralized approach for service composition.
Service choreography is a global description of the participating services, which is defined by exchange of messages, rules of interaction and agreements between two or more endpoints. Choreography employs a decentralized approach for service composition.
The choreography describes the interactions between multiple services, where as orchestration represents control from one party's perspective. This means that a choreography differs from an orchestration with respect to where the logic that controls the interactions between the services involved should reside.
Best Answer
Use openESB with netbeans editor or any other open source BPEL engines which provides standard way or orchestrating the process. if you think performance is very important than standardization you can try out some proprietary ESB or BPM tools like Jboss jBPM or mule ESB etc.
Please note BPEL can be used only to consume Web Services if your components are not web services then you may have to use some ESB like Mule which can support some 200+ protocols with extensions.