worker/singular: new package

worker/singular: new package

This acts as a wrapper that will allow us to
start workers that require only one instance.

https://code.launchpad.net/~rogpeppe/juju-core/535-worker-singular/+merge/213874

(do not edit description out of merge proposal)

[rog, 2014-04-02 15:23:44]

Please take a look.

[wwitzel3, 2014-04-02 16:02:52]

LGTM

https://codereview.appspot.com/83300047/diff/20001/worker/singular/singular.go
File worker/singular/singular.go (right):

https://codereview.appspot.com/83300047/diff/20001/worker/singular/singular.g...
worker/singular/singular.go:61: 
Even though it is internal it might be nice to at least have a small comment
that points to the great implications of the use of pinger else where since to
me it is isn't obviously clear its purpose .. though that just might be me being
naive about golang.

[rog, 2014-04-02 16:06:59]

Please take a look.

https://codereview.appspot.com/83300047/diff/20001/worker/singular/singular.go
File worker/singular/singular.go (right):

https://codereview.appspot.com/83300047/diff/20001/worker/singular/singular.g...
worker/singular/singular.go:61: 
On 2014/04/02 16:02:52, wwitzel3 wrote:
> Even though it is internal it might be nice to at least have a small comment
> that points to the great implications of the use of pinger else where since to
> me it is isn't obviously clear its purpose .. though that just might be me
being
> naive about golang.

Done.