Bosch BIS 2.3 Installation Manual page 97

BIS 2.3 - Access Engine
Transactor are inserted into each application module, e.g. one
for access control, one for configuration data management, etc.
The client dialogs never execute the updates directly in the
database; instead, they always transmit a corresponding
request to their transactor. However, many actions of the
dialogs cause more than one update of the databases. Such
extensive actions can be combined into database transactions;
all necessary actions are concentrated in the transactor instead
of being divided up among many user dialogs. In client/server
terminology, this approach is known as "business rules" and is
sometimes regarded as a third link between the client and
server. The "business rule" link is inserted into the DMS in the
form of transactor processes, which receive central knowledge
about, for example, how ID cards are activated or deactivated,
how a person's access rights are changed or how an
authorization model is deleted.
The existence of these "business rules" is the reason why all
interactive database changes can only be executed by the
dialogs of the DMS, and tools such as MS Query or MS Access
are not used. The use of such tools would enable the user to
make changes to a database table without transmitting these
changes to the other tables. These tools should therefore only
be used in "read-only" mode.
Transactors are processes that take over the database changes.
There are different transactors for different areas of the system,
e.g.
–
–
–
Transactor for access control (ACTA)
All updates of the access control data are executed by a single
process on the server side. This process is called the transactor
Bosch Sicherheitssysteme GmbH
ACTA (Access Control Transactor) - transactor for the
access control system
CDTA (Configuration Data Transactor) - transactor for the
configuration data
CALTA (Calendar Transactor) - transactor for the data of
the calendar model
Installation manual
DMS - Data Management System | en
F.01U.028.713 | V 2.3.0.1 | 2009.11
97