How to restart a simple daemon?

[XiaoGuo Liu]

Hi Enwei,

When your app is running, your app definitely knows since it is started.
You can do something there.

When your app is stopped, you can also add a "stop-command" when you define
your snapcraft.yaml. Please refer to
http://snapcraft.io/docs/build-snaps/syntax

I do not know whether there are any hooks for this purpose.

Hope this helps!
XiaoGuo

On Mon, Nov 21, 2016 at 11:22 AM, Enwei Zhang <enwei.zhang at canonical.com>
wrote:

> Hi Xiaoguo and folks,
> Is there a notification/callback mechanism so that when snap
> enable/disable is executed on my snap, my snap can receive notification to
> do some corresponding actions?
> Thanks.
>
> Br
> Enwei
>
> On Mon, Nov 21, 2016 at 10:50 AM, Enwei Zhang <enwei.zhang at canonical.com>
> wrote:
>
>> Thank you so much Xiaoguo.
>>
>> On Mon, Nov 21, 2016 at 10:30 AM, XiaoGuo Liu <xiaoguo.liu at canonical.com>
>> wrote:
>>
>>> Hi Enwei,
>>>
>>> There are a few ways to handle it.
>>>
>>> 1) You do not need to make it a daemon before it is getting stable. When
>>> your run your app, just use "sudo" to run it on command line. When it is
>>> stable, change it to daemon.
>>>
>>> 2) You can use "snap enable/disable" to toggle the state of the app.
>>> When it is enabled, it starts to run again. In your case, your daemon app
>>> will be restarted.
>>>
>>> Best regards,
>>> XiaoGuo
>>>
>>> On Mon, Nov 21, 2016 at 10:23 AM, Enwei Zhang <enwei.zhang at canonical.com
>>> > wrote:
>>>
>>>> Hello,
>>>> When I install a simple daemon snap, the daemon is started right after
>>>> it is installed.
>>>> Suppose it stops due to some condition, is there a way to restart it?
>>>> Thanks a lot.
>>>>
>>>> Br
>>>> Enwei
>>>>
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>>>>
>>>
>>>
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>>> XiaoGuo, Liu
>>>
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>>
>
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-- 
XiaoGuo, Liu
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