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Service implementation types

Service implementation types are the implementations of the service components.

The standard implementations of the services are described in this section. These implementations will appear in services in the assembly editor and or within BPEL processes.

• Java objects
  An implementation of a component in Java™ is referred to as a Java object. One common implementation is a component that is written in Java. This implementation is sometimes nicknamed a "plain old Java object" or POJO.
• BPEL process
  The Business Process Execution Language (BPEL) is a standard industry language. A BPEL process component implements a business process.
• State machines
  A state machine is an alternative way of creating a business process. A state machine is suited for processes related to changing states rather than a flow of control. A state defines what an artifact can do at a point in time.
• Business rules
  Business rules complement business processes and state machines. If there is condition with a variable, for example, you can use a business rule to change the value in that variable at run time.
• Selectors
  Integrated applications contain many ways to interact. A selector is used to route an operation from a client application to one of several possible components for implementation.
• Human tasks
  A human task component implements a task done by a person. It represents the involvement of a person in a business process.
• Mediation flows
  Mediation is a way of mediating or intervening dynamically between services. A mediation flow implements a mediation.
• Stand-alone references
  Stand-alone references are references to applications that are not defined as SCA components (for example, JavaServer Pages or servlets). Stand-alone references permit these applications to interact with Service Component Architecture components.

SCA

Related concepts:
Service components
Service data objects
Service qualifiers
Modules
Imports and exports