A framework for sharing data between network-connected applications and a
remote procedure call mechanism.
The normal configuration of the Presents system is client/server; generally
with many clients connecting to a single server though a system exists to
allow a network of peer servers to communicate with one another . All
information transfer takes place through the server using the distributed
object system documented below.
For libraries that are build on the distributed object services as well
as most code in a system using the distributed object services, everything
you need are in these packages:
- annotation - annotations
used for dependency resolution, distributed object defintion and
documentation purposes.
- dobj - the core of the
distributed object system.
- tools - ant tasks for
generating ditsributed object setter methods, invocation service and
invocation receiver marshallers.
- util - various utilities that
simplify life for users of the distributed object services.
Systems making use of the distributed object services will need to set
up a client and server. The following packages contain those services and
their implementation:
- client - the client side of
the distributed object client/server framework.
- data - classes that are sent
over the network (and hence shared by the client and server); constant
definition interfaces.
- net - classes used to define and
implement the Presents protocol.
- server - the server side of
the distributed object client/server framework.
Systems that need to scale beyond a single server will need to make use
of services in the peer package which provides a mechanism by which
multiple servers can operate in concert.