BBjAPI::getGlobalNamespace

Description

In BBj 3.00 and higher, this method retrieves a BBjNamespace.

Syntax

Return Value	Method
BBjNamespace	getGlobalNamespace()

Parameters

None.

Return Value

Returns a BBjNamespace that refers to the persistent global Namespace.

Remarks

The global Namespace is accessible to any BBjProcess. It should be used with care because any BBjProcess can modify it. The global Namespace is unique in that it persists, even if there are no processes that have references to it.

The globalNamespace will continue to exist until BBjServices is restarted.

The method getGlobal Namespace() provides a mechanism by which all BBj Processes may share data and communicate with all running BBjProcesses.

Example

sysgui = unt
open (sysgui)"X0"
api! = BBjAPI()
sysgui! = api!.getSysGui()

rem 'retrieve a namespace, get value of count
switch argc
    case 1
        rem 'run from command line with no namespace name
        prefix$ = "basis.eng.test.namespace"
        sharedNSName$ = "test"
        sharedNS! = api!.getNamespace(prefix$, sharedNSName$, 1)
        break
    case 2
        rem 'run from command line with a namespace name
        prefix$ = argv(1)
        sharedNSName$ = "test"
        sharedNS! = api!.getNamespace(prefix$, sharedNSName$, 1)
        break
    case 3
        rem 'run from within MDI
        prefix$ = "basis.eng.test"
        sharedNSName$ = argv(1)
        sharedNS! = api!.getExistingNamespace(sharedNSName$)
        break
swend
count = sharedNS!.getValue("count", err = setCount)
privateNS! = api!.getNewNamespace(prefix$)
privateNS!.setValue("count",0)
name$ = "client-" + privateNS!.getName()

rem 'retrieve position
rem 'x = sharedNS!.getValue("x", err = setXY)
y = sharedNS!.getValue("y", err = setXY)

rem 'increment position
rem 'sharedNS!.setValue("x", x+50)
sharedNS!.setValue("y", y+50)

rem 'create window
rem 'window! = sysgui!.addWindow(x,y,300,200,name$)
plus! = window!.addButton(1,5,10,90,30,"Increment")
minus! = window!.addButton(2,105,10,90,30,"Decrement")
window!.addStaticText(101,5,50,290,30,"sharedCount:   ")
window!.addStaticText(102,5,70,290,30,"privateCount: ")
sharedCount! = window!.addStaticText(103,200,50,290,15,str(count))
privateCount! = window!.addStaticText(104,200,70,290,15,str(0))
break! = window!.addButton(3,5,110,90,30,"Break")
break!.setCallback(break!.ON_BUTTON_PUSH,"onBreak")

rem 'set callback for controls
rem 'plus!.setCallback(plus!.ON_BUTTON_PUSH, "onPlus")
minus!.setCallback(plus!.ON_BUTTON_PUSH, "onMinus")
window!.setCallback(window!.ON_ACTIVATE, "onActivate")

rem 'set callback that is to be called when count changes
sharedNS!.setCallbackForVariable("count", "showCount")
privateNS!.setCallbackForVariable("count", "showCount")

rem 'call onActivate to set tell others we have activated
gosub onActivate
callback(ON_CLOSE,done,sysgui!.getContext())
process_events

onPlus:
    sharedNS!.setValue("count", 1 + sharedNS!.getValue("count"))
    privateNS!.setValue("count", 1 + privateNS!.getValue("count"))
return

onMinus:
    sharedNS!.setValue("count", -1 + sharedNS!.getValue("count"))
    privateNS!.setValue("count", -1 + privateNS!.getValue("count"))
    count = count - 1
return

onActivate:
    print "onActivate called"
    sharedNS!.setValue("activeClientNS", privateNS!.getName())
    sharedNS!.setValue("activeClientName",name$)
return

showCount:
    sharedcount!.setText(str(sharedNS!.getValue("count")))
    privatecount!.setText(str(privateNS!.getValue("count")))
return

onBreak:
    escape
return

done:
release

setXY:
    x = 100
    y = 100
    sharedNS!.setValue("x", x)
    sharedNS!.setValue("y", y)
retry

setCount:
    count = 0
    sharedNS!.setValue("count", count)
retry