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From Gabriele Ricciardi <lele.riccia...@gmail.com>
Subject Re: Publisher / subscriber implementation for Celix
Date Mon, 19 Dec 2016 11:00:13 GMT
Thanks for your contribution, we look forward to integrate your pull
request! :-)


2016-12-19 11:58 GMT+01:00 Gabriele Ricciardi <lele.ricciardi@gmail.com>:

> 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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