As revised 2006.05.04
Bionic Buffalo Tech Note #55
object is downloaded to the client from a carousel, the downloaded object is
implemented on the client, but supports only a limited subset of the defined operations. The downloaded
object state consists of references (taps) describing the network address of a broadcast program. No
interactive playback support is provided.
12. Abstract Interfaces
Some interfaces described in DSMCC are abstract and not instantiable. In other words, they can be
inherited by other DSMCC interfaces, but an object with such an interface alone never exists.
defines attributes which provides size, update time and date, lock status, and a mask of
which user groups have manager, broker, writer, or reader access to an object. Most instantiable DSM
CC interfaces inherit
provides two operations:
, for the destruction of objects and
for the release of references. Most instantiable DSMCC interfaces inherit
allows a set of child objects to be associated with a given (parent) object; the
parent object inherits the
interface. A version is associated with each child object.
The interface exists for the convenience of developers, and is not required by any part of the DSMCC
is used to implement a form of asynchronous operation call on the object which inherits
interface. An attribute
is used to switch the operation calls between
synchronous and asynchronous mode. In asynchronous mode, calls immediately return a request handle
from the stub, without waiting for the operation to complete. With the
request handle may be used to check status. With the
operation, the handle may be used later to
wait for operation completion.
may be inherited by DSM::Stream. It is by an application to intercept event information
embedded in the content stream. The
operation subscribes to an event, while
cancels a subscription. The
operation blocks, not returning until one of
the subscribed events has been received.
may be inherited by a
object. It provides two operations:
to obtain a reference to the primary service
may be inherited by any instantiable interface. It provides two operations:
determine if an object supports a given interface, and
to list the interfaces supported by an
Copyright 2006 Bionic Buffalo. All rights reserved.
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