Hi Akalanka, Could we also consider the approach used by the ProtocolProcessor of Moquette ?
Where all the subscriptions are kept in a Tree based on their hierarchy and when a message is published, the published topic is split into tokens, and then the tree will be traversed for a match. When a match is found, the message would be sent to the ancestral node and its descendants. It might also be good if we could find a way to point to the functionality Moquette has introduced for cluster wide subscription identification as well. This way if the protocol introduces a different set of wild cards, the change will be reflected from the library itself. WDYT ? Thanks, Pamod On Thu, Dec 4, 2014 at 12:34 AM, Chamila De Alwis <[email protected]> wrote: > Hi Akalanka, > > Even though for the multi-level wildcard using if else might be simpler, > since the single-level wildcard can appear in several places of the topic > name wouldn't it be better to follow the regex approach? > > > Regards, > Chamila de Alwis > Software Engineer | WSO2 | +94772207163 > Blog: code.chamiladealwis.com > > > > On Wed, Dec 3, 2014 at 2:49 PM, Akalanka Pagoda Arachchi < > [email protected]> wrote: > >> Hi all, >> >> I am implementing wildcard support for MQTT in WSO2 MB. >> >> The MQTT 3.1 Specification [1] provides details about how the wildcards >> should behave. >> >> According to this, to implement this match making I can either use >> java.lang.String functions and if else conditions or use a regular >> expression. >> >> I believe a regular expression will be a bit more complex to understand >> and hence prefer to use if else conditions. What will be best way to >> approach this? >> >> [1] - >> http://docs.oasis-open.org/mqtt/mqtt/v3.1.1/os/mqtt-v3.1.1-os.html#_Toc398718107 >> >> Thanks, >> Akalanka >> -- >> *Akalanka Pagoda Arachchi,* >> *Software Engineer* >> *078-4721791 <078-4721791>* >> >> _______________________________________________ >> Dev mailing list >> [email protected] >> http://wso2.org/cgi-bin/mailman/listinfo/dev >> >> > > _______________________________________________ > Dev mailing list > [email protected] > http://wso2.org/cgi-bin/mailman/listinfo/dev > > -- *Pamod Sylvester * *Senior Software Engineer * Integration Technologies Team, WSO2 Inc.; http://wso2.com email: [email protected] cell: +94 77 7779495
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