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Application 2 Application Services

Application 2 Application Services
Application 2 Application Services is services which orchestrates services from several applications, typically asynchronous and workflow-backed. I.e. a Auction type request against a set of suppliers or an booking/order/delivery process.
Suggestion for a more presise definition
An A2A service is a service which is responsible for collaboration between several human or automated actors.

Characteristics

Two types:

*Process Services

  • Services orchestrated to produce real business value
  • Workflow-oriented processes
  • Orchestrated functionality from several services
  • ACS/CS services as Business/Domain Objects
  • External applications for sub-processes & tasks
  • Long running processes
  • Should not have any long-running transactions
  • Could (should) have cache (state full)

Application Integration Service Endpoints

  • Services which integrate and map against external application endpoints
  • Should (internally) provide for SLA and contractual requirements (via cache, rebind, fail-over and such)
  • Works as an external data anti-corruption layer for external application endpoints to reduce dependencies and facilitate evolve ability

Patterns for Application 2 Application Services


Application 2 Application Services

Technology/Implementation strategy (Java)

Technology, implementation and products

  • Pick your favorite JEE/ESB/SOA platform vendor
    • Sun, IBM, Oracle
  • Choose your favorite open source ESB/SOA platform
    • OpenESB or another Open Source JBI container
    • write a simple admin framework (upgrade tool support)

Technology/Implementation strategy (.NET)

Technology, implementation and products

  • BizTalk Server
  • Enterprise Human Workflow products can do some tasks
    • Enterprise Human Workflow with K2.NET / Skelta/ Captaris++
    • Portal connectors useful

Design rules


Other technical details

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