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DSOM Framework Quick Reference

SOMObject

BOA

Context

Class Organization

Basic Object Adapter. Abstract class which defines basic interfaces that a

server process uses to access services of an Object Request Broker like

DSOM. Defines methods for creating and exporting object references,

registering and activating implementations, and authenticating requests.

Context. List of properties (Environment variables) that can be

passed in a method invocation. Each property consists of a name

and a string value.

SOMDServer

DSOM Server. Base class which defines and implements methods for

managing objects in a server. Includes methods for object creation and

deletion, and mapping between SOM objects and object references. Also

supports intercepting and redispatching method calls.

ImplementationDef

ImplRepository

Implementation Repository. Defines and implements methods used to

query and update the DSOM implementation repository, which stores

copies of the ImplementationDef objects.

Implementation Definition. Attributes define the implementation of a server.

SOMOA

SOM Object Adapter. Subclass of BOA. Implements BOA methods, and

introduces methods for receiving and dispatching requests.

ObjectMgr

Object Manager. Abstract class which defines basic interfaces for

creating objects, destroying objects, and mapping between objects and

their ids.

SOMDObjectMgr

DSOM Object Manager. Provides a DSOM-specific implementations

of the ObjectMgr abstract class. Also, introduces methods for finding

DSOM server implementations, by id, alias, and class.

SOMDObject

DSOM Object. Implements an “object reference” in DSOM. Includes

methods for getting an implementation or interface from a reference,

testing whether it is nil, and duplicating or releasing the reference.

SOMDClientProxy

DSOM Client Proxy. Subclass of SOMDObject. This “mixin” class is

used to implement proxy objects in client processes. Provides the

remote dispatching function used to forward requests to target objects.

Also supports the construction of dynamic requests to be invoked

against the proxy object.

NVList

Named Value List. Implements a list of <name,value> pairs. NVLists

are used in building Request objects and Context objects.

ORB

Object Request Broker. Defines and implements various utility

methods as defined in the CORBA 1.1 specification. Included are

methods for converting object references to and from strings, for

creating NVLists to be used in building specific Requests, and for

obtaining a default Context object.

Request

Request. Represents a method call and parameters, in the Dynamic

Invocation Interface. Includes methods used to invoke the request,

either synchronously (waits for a response) or asynchronously.

Principal

Principal. Attributes contain the ids of the user and host from which a

request originated. Used by application for access control checking.

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SOMDServerMgr

DSOM Server Mgr. Provides a programmatic interface to manage

server processes. Server processes that can be managed are limited

to those in the Implementation Repository (as set by the SOMDDIR

environment variable).

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