Speaker
Dr
Carlo Baffa
(INAF - Osservatorio di Arcetri)
Description
The CSP–LMC, as the other LMCs, will have a layered structure. As a consequence, each level of our layered structure maintains a 'summary' status of the physical conditions of lower level devices. But we need to let higher levels, engineering interface, and TM to get detailed parameters values of those lower devices.
We devised a flexible approach to this operation. We propose a new command: getLowerStatus. When a device server receives such a command it sends the same command to lower level device server with its argument, recursionLevel, decreased by one. If recursionLevel is already at zero, the device server doesn't send such a request. After getting the response from lower level devices (or at once, if recursionLevel is at zero), each device server builds a json1 object composed by all its parameters and by the lower level device answers, and sends the resulting blob to the device immediately above, via a Tango Pipe.
To limit the amount of data exchanged, we can devise some provision for 'data pruning' or direct device addressing, as, for instance, defining the start point of command execution (e.g. the class which start the real execution of the command).
Comments and suggestions?
Summary
We propose a new command: getLowerStatus to let higher levels, engineering interface, and TM to get detailed parameters values of lower devices in a flexible way.
Primary author
Dr
Carlo Baffa
(INAF - Osservatorio di Arcetri)
Co-author
Dr
Elisabetta Giani
(INAF - Osservatorio di Arcetri)
