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Appendix C
Resource Adaptors and Resource Adaptor
Entities
C.1 Introduction
The SLEE architecture defines the following resource adaptor concepts:
Resource adaptor type: A resource adaptor type specifies the common definitions for a set of resource adaptors. It
defines the Java interfaces implemented by the resource adaptors of the same resource adaptor type. Typically, a resource
adaptor type is defined by an organisation of collaborating SLEE or resource vendors, such as the SLEE expert group.
An administrator installs resource adaptor types in the SLEE.
Resource adaptor: A resource adaptor is an implementation of particular resource adaptor type. Typically, a resource
adaptor is provided either by a resource vendor or a SLEE vendor to adapt a particular resource implementation to a
SLEE, such as particular vendor s implementation of a SIP stack. An administrator installs resource adaptors in the
SLEE.
Resource adaptor entity: A resource adaptor entity is an instance of a resource adaptor. Multiple resource adaptor
entities may be instantiated from a single resource adaptor. Typically, an administrator instantiates a resource adaptor
entity from resource adaptor installed in the SLEE by providing the parameters required by the resource adaptor to bind
to a particular resource. In Rhino, a single resource adaptor entity may have many Java object instances, for example
when running more than one Java Virtual Machine in a Rhino cluster, each event processing node will contain a Java
object instance that represents the resource adaptor entity in the Virtual Machine address space.
The lifecycle and APIs for resource adaptors are out of scope of the SLEE specification. Rhino defines its own Resource
Adaptor framework. This chapter describes the lifecycle of resource adaptor entities in Rhino.
C.2 Entity Lifecycle
The administrator controls the lifecycle of the resource adaptor entity. This section discusses the resource adaptor entity lifecycle
state machine as shown in figure C.1.
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