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From Gabriele Ricciardi <lele.riccia...@gmail.com>
Subject Re: Publisher / subscriber implementation for Celix
Date Mon, 19 Dec 2016 10:58:57 GMT
Hi Roy,

welcome to the Celix community!

2016-12-16 14:58 GMT+01:00 Roy Lenferink <lenferinkroy@gmail.com>:

> Hi everyone,
>
> I'm Roy Lenferink, a software engineering student at Saxion University of
> Applied Sciences.
> For my 3rd year I'm having an internship at Thales Nederland.
>
> Over the past few months I've been working together with Pepijn Noltes,
> Erjan Altena and
> Gabriele Ricciardi on a (secure) publisher / subscriber implementation,
> which is based on
> the concepts of the remote service admin (i.e. rsa / topology / discovery
> pattern).
>
> Publishers are senders of data, subscribers can receive data. Publishers
> can publish/send
> data to certain channels (called 'topics' further on), subscribers can
> subscribe to these
> topics. For every topic a publisher service is created by the pubsub admin.
> This publisher
> is announced through etcd. So etcd is used for discovery of the publishers.
> Subscribers are
> also registered as a service by the pubsub admin and will watch etcd for
> changes and when
> a new publisher is announced, the subscriber will check if the topic
> matches its interests.
> If the subscriber is interested in/subscribed to a certain topic, a
> connection between
> publisher and subscriber will be instantiated by the pubsub admin.
>
> The dfi library is used for message serialization. The publisher /
> subscriber implementation
> will arrange that every message which will be send gets an unique id.
>
> For communication between publishers and subscribers UDP and ZeroMQ can be
> used. When using
> ZeroMQ it's also possible to setup a secure connection to encrypt the
> traffic being send
> between publishers and subscribers. This connection can be secured with
> ZeroMQ by using
> a curve25519 key pair per topic.
>
> The publisher/subscriber implementation supports sending of a single
> message and sending
> of multipart messages.
>
> Soon I will create a JIRA issue together with a pull request to get this
> part included within Celix.
>
> If you have any further questions, just reply to this mail!
>
> Roy
>

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