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Subject:	You can retrieve the last RRD
Author:	Jim R
Posted:	2015-09-02 11:17

You can retrieve the last RRD value using something like URL/UID/getRRDValuedsname=DPNAME and add that to your java script for the device.

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Subject:	Awesome, works great. Thanks
Author:	[Not Specified]
Posted:	2015-09-02 23:52

Awesome, works great. Thanks a lot!!

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Subject:	Harsszegi, maybe you'd be
Author:	[Not Specified]
Posted:	2015-09-08 08:15

Harsszegi, maybe you'd be willing to write up a wiki page for how you did that What files you edited, what you added, for others to follow as an example.

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Subject:	Actually not too much was
Author:	[Not Specified]
Posted:	2015-09-08 08:23

Actually not too much was needed:
create a getter in the device's .py code
which simply does a self.getRRDValue('rrdfieldname')
Then simply define the membervariable in
info.py with a @property and call your getter in
the device.
But will update this thread with a bit nore details tomorrow

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Subject:	A lot of what you wrote there
Author:	[Not Specified]
Posted:	2015-09-08 08:26

A lot of what you wrote there must seem blindingly obvious to you but the rest of us have no idea what you're talking about. :)

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Subject:	So here it goes:
Author:	[Not Specified]
Posted:	2015-09-09 01:35

So here it goes:

a.) You have your Device or DeviceComponent, your create something like this:
- if you are a DeviceComponent

def getCPUFanStatus(self):
return self.device().getRRDValue('CPUFanStatus')

- if you are a Device

def getCPUFanStatus(self):
return self.getRRDValue('CPUFanStatus')

b.) You create something like this in your info.py

class CpuInfo(ComponentInfo):
implements(ICpuInfo)

@property
@info
def CPUFanStatus(self):
return self._object.getCPUFanStatus()

c.) You create the appropriate DataSource either manually or in your objects.xml,
e.g.

So practically you don't ProxyProperty the variable back to a variable in your device, but instead you
create a wrapper,so practically whenever ZenOss interacts with the "CPUFanStatus" ""variable"",
it'll automatically call "getCPUFanStatus()" underneath, hence you'll get your RRD value on the fly.