UML PROFILE FOR SAVECCM - Research

SaveCCM
Unlike components, switches can not be activated, they respond instantly at the
arrival of data or trigger signal on some of the input ports. Switch does any other
computation except evaluation of connection conditions.
To use switch for pre-run-time static configuration, fixed values need to be
statically bound to the data or combined input ports. Switches can also be used
dynamically e.g. for specifying modes and mode-switches, each mode
corresponding to a specific static configuration. By changing the port values at runtime,
a new configuration can be activated, thus achieving a mode-shift.
5.3.3 Assemblies
Assembly is an encapsulated subsystem. Its internal structure, subcomponents
and interconnections are hidden from its environment and can be accessed only
through assembly ports.
Contrary to components, assembly can not be triggered. Data and trigger
signals are immediately processed. Therefore, assembly should not be considered
as a component composition mechanism but as way of naming a collection of
components and hiding its internal structure.
5.3.4 Ports
As it is already mentioned, SaveCCM differentiates several kinds of ports.
Referring to port’s direction, port can be input or output port, and referring to the
signal type, port can be data, trigger or combined port. Component input ports, the
output ports of the whole system, and switch set ports, are one-place buffers with
overwrite semantics. The other ports are only conceptual interaction points
through which data passes immediately.
Every data port has its type and optionally an initial value.
An external port is a special kind of port that is not connected with any other
port in the model, but has an extra label mapping it to some external entity (for
example to I/O-ports, interrupts, and real-time database pointers). The format of
this label depends on the external entity to which the port is mapped. External
ports are not allowed internally within a composite component.
5.3.5 Connections
Connections define how data and control can be transferred between
components. SaveCCM offers two types of connections: immediate and complex.
In SaveCCM reference manual [SaveR 07], immediate connection is defined as a
"loss – less, atomic migration of data or trigger signals from one port to another, as
would typically be the case between components located on the same physical
node". However, in distributed systems and in early stages of modelling, another,
more general connection is convenient – a complex connection. A complex
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