Transactions

• Services can be:
  • Non-Transactional Services
  • Transactional Service
• Non-Transactional services are the services that does not modify data.

E.g. File Adapter, FTP Adapter

• Transactional service can be defined as any service that performs DML operations, where each operation are subject to ACID(Atomicity, Consistency, Isolation, Durability) principles.
• Transactional services are implemented as a java web services or adapter services which are invoked from SOA using BPEL or Mediator
• Transactional boundaries depend on context, configurations and environment of the services that are implemented and invoked.
• Transactional semantics differs for the services that are invoked synchronously compared with services invoked asynchronously.

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