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This function allows you to programmatically 'retarget' the Client to a different project and/or different Gateway. You can have it switch to another project on the same Gateway, or another gateway entirely, even across a WAN. This feature makes the vision of a seamless, enterprise-wide SCADA application a reality.
The retarget feature will attempt to transfer the current user credentials over to the new project / Gateway. If the credentials fail on that project, the user will be prompted for a valid username and password. Once valid authentication has been achieved, the currently running project is shut down, and the new project is loaded.
You can pass any information to the other project through the parameters dictionary. All entries in this dictionary will be set in the global scripting namespace in the other project. Even if you don't specify any parameters, the system will set the variable _RETARGET_FROM_PROJECT to the name of the current project and _RETARGET_FROM_GATEWAY to the address of the current Gateway.
This scripting function has no Client Permission restrictions.
As of version 8.0.8, this function accepts keyword arguments.
system.util.retarget(project [, addresses] [, params] [, windows])
String project - The name of the project to retarget to.
String or List addresses - The address of the Gateway that the project resides on. If omitted, the current Gateway will be used. Format is: host:port. [optional]
As of 8.0.8 this can be a list of strings. When using a list, the function will try each address in order, waiting for the timeout period between each address attempt.
PyDictionary params - A dictionary of parameters that will be passed to the new project. They will be set as global variables in the new project's Python scripting environment. [optional]
String[] windows - A list of window paths to use as the startup windows. If omitted, the project's normal startup windows will be opened. If specified, the project's normal startup windows will be ignored, and this list will be used instead. [optional]
Nothing
Vision Client
# This code would switch to a project named 'TankControl' on the same Gateway
# as the currently running project
system.util.retarget("TankControl")
# This code would switch to a project named 'TankControl' on a
# Gateway located at a different IP address running on port 8080, and
# would open the window named "Graph", and set a global jython variable in the
# new project named "retargetOccured" to the value 1 (one).
system.util.retarget("TankControl", "10.30.2.33:8088", {"retargetOccured":1}, ["Graph"])
# This code would switch to a project named 'TankControl' on a
# Gateway located at a different IP address using SSL on port 8043
system.util.retarget("TankControl", "10.30.2.34:8043")
# This code would be put in a button in the target that was retargetted to, # and act as a 'back' button, that would retarget back to the original project. # fetch the global values that are automatically created when you retarget project = system.util.getGlobals()['_RETARGET_FROM_PROJECT'] gateway = system.util.getGlobals()['_RETARGET_FROM_GATEWAY'] # retarget system.util.retarget(project, gateway)
system util retarget, util.retarget