Re: [iot-wg] Questions regarding MQTT/Paho

[Ian Craggs <icraggs@xxxxxxxxxxxxxxxxxxxxxxx>]

Hi Jens,

what Benjamin says is correct.  It is a manual step to reconnect in the 
callback.  This is for a number of reasons.

1.  MQTT is defined as a protocol rather than an API, so the APIs have 
been written to be close to the behaviour of MQTT.  This makes it easy 
to understand the APIs in the context of MQTT, and provides maximum 
flexibility.

2. Depending on the connect options used, will message or clean session 
for instance, disconnection and reconnection can have effects which you 
need to know about and/or control.  You may want to change connect 
options when you reconnect, or delay reconnection.  To allow all these 
combinations on automatic reconnection would require a complicated API.

Ian

On 07/25/2014 02:08 PM, Benjamin Cabé wrote:
> Hi Jens,
>
> I think you may want to post this question on the paho-dev mailing list (I
> cross-posted there)!
> My understanding though is that when the MqttCallback#connectionLost()
> method is called, it's up to you to decide whether you want to reconnect
> or not.
>
> Benjamin.
>
>
> Le 25/07/2014 14:47, « Jens Reimann » <jens.reimann@xxxxxxxxxxxxxxx> a
> écrit :
>
> > Hi,
> >
> > maybe somebody can give me a short hint about the MqttAsyncClient from
> > Paho.
> >
> > I found the javadoc, and know how to connect and disconnect. What I
> > don't know is, what will happen when the connection breaks. Does it
> > automatically re-connect, or is this a "manual" step?
> >
> > Thanks for helping
> >
> > Jens
> >
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--
Ian Craggs
icraggs@xxxxxxxxxx                 IBM United Kingdom
Committer on Paho, Mosquitto