| 13 | | * Control System -- |
| 14 | | A Control System is a stand alone program that performs a set of functions. It may receive commands from other systems and will emit events containing information that it |
| 15 | | knows about. It may send commands to other systems and may listen to events from other systems. A Control System |
| | 13 | * Control System --- |
| | 14 | A Control System is a stand alone program that performs a set of functions. It may receive commands |
| | 15 | from other systems and will emit events containing information that it |
| | 16 | knows about. It may send commands to other systems and may listen to events from other systems. |
| | 17 | Current Control Systems are tracker_server, tcs_server, pasServer, pfipServer, tcsGui, apcGui, and tcsnamed. |
| | 18 | Other Control Systems will be developed in the future to replace older operations systems. |
| 17 | | * Subsystems -- |
| 18 | | A Subsystem |
| | 20 | * Subsystems --- |
| | 21 | A Subsystem is essentially a smaller self-contained system with in a Control System. An example would |
| | 22 | be the Structure Subsystem with in the legacy Control System. |
| | 23 | |
| | 24 | * Route --- |
| | 25 | A Route is a Uniform Resource Identifier (URI) that is used by Control System clients to talk to other |
| | 26 | Control Systems. Commands and requests to Control System handlers are |
| | 27 | sent to the route address. The URI is of the form |
| | 28 | tcp://xxx.xxx.xxx.xxx:nnnnn where xxx.xxx.xxx.xxx is an IP address |
| | 29 | and nnnnn is a port number. For example, the Route to the tcs_server |
| | 30 | is tcp://192.168.66.31:30300. The 'tcp' is the protocol and may be a |
| | 31 | different protocol, however, all control systems within Tcs use the |
| | 32 | TCP protocol. |
| | 33 | |
| | 34 | * Event Route --- |
| | 35 | An Event Route is a URI that is used by a control system to emit |
| | 36 | events. Clients and other control systems may listen to these events |
| | 37 | to obtain state information about the control systems. The URI's port |
| | 38 | number is normally one higher than the control system route port. For |
| | 39 | example, the tcs_server route is on port 30300 and its event route is |
| | 40 | on port 30301. |
| | 41 | |
| | 42 | * Handler --- |
| | 43 | A handler is a function with in a Control System that may be run be |
| | 44 | a client. A Handler is commanded via the Route to the Control System. |
| | 45 | When the Handler completes, a return message is sent to the client. |
