camel-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Claus Ibsen <claus.ib...@gmail.com>
Subject Re: Prototype for reactive streams and a messaging component abstraction
Date Tue, 27 Jun 2017 07:47:55 GMT
Hi

Yeah there is already reactive stuff today in Apache Camel as well some examples
https://github.com/apache/camel/tree/master/examples

The reactive streams is the abstraction API where you can then chose
to use RxJava 2 or Reactor. There is a camel-rx2 in the works for
Camel 2.20. The old camel-rx is for RxJava 1.x and will be deprecated.

There is also a full chapter about Reactive Camel in the CiA2 book,
which will be freely available for online download later, as its been
decided to be a bonus chapter.

The source code for the book has some smaller examples as well
https://github.com/camelinaction/camelinaction2/tree/master/chapter21/reactive-streams

And hopefully Nicola's talk will be posted on youtube as it was
recorded, and it showcased how great Camel already works with Reactive
today.


On Tue, Jun 27, 2017 at 9:40 AM, Zoran Regvart <zoran@regvart.com> wrote:
> Hi Christian,
> that's really cool, the Reactor projects brings about a nice API and a
> lot of functionality out of the box. I think the main thing with Camel
> being fully reactive is to find out how to do that with all the EIPs
> supported.
>
> I think you might find it interesting that Nicola created a way to
> integrate reactive systems with Camel with camel-reactive-streams[1],
> you can find out more in the talk he did recently[2].
>
> zoran
>
> [1] https://github.com/apache/camel/blob/master/components/camel-reactive-streams/src/main/docs/reactive-streams-component.adoc
> [2] https://www.nicolaferraro.me/2017/06/20/jbcnconf-barcelona-integrating-applications-the-reactive-way/
>
> On Tue, Jun 27, 2017 at 9:08 AM, Christian Schneider
> <chris@die-schneider.net> wrote:
>> I recently looked into ways to combine messaging and streaming on OSGi. So
>> the following is a bit OSGi specific regarding finding components but I
>> think this can also be done for non OSGi usage.
>>
>> Interestingly the best reactive streams solution I found for my case was
>> Reactor (by Pivotal) which is the core of spring 5. It works out of the box
>> on OSGi and only has a single dependency.
>> The next thing was how to combine this with messaging in a loosely coupled
>> way. I really like Apache Camel but I think it is not up to date any more
>> and also acquired a lot of weight over time (especially in camel-core). So I
>> was looking into providing a light weight component API and combine it with
>> Reactor.
>>
>> The result is this project:
>>
>> https://github.com/cschneider/streaming-osgi/tree/master/reactortest
>>
>> This is the Component API:
>> https://github.com/cschneider/streaming-osgi/blob/master/reactortest/src/main/java/component/api/MComponent.java
>> Actually I am unsure if the converter must be part of the API but this is
>> the current state.
>>
>> I created some POC components for Mqtt, EventAdmin and Mail.
>>
>> and finally two examples:
>> Listen on eventadmin topic, log and forward to other topic:
>> https://github.com/cschneider/streaming-osgi/blob/master/reactortest/src/main/java/reactortest/ExampleEventAdmin.java
>>
>> Listen to mqtt, compute average over sliding window and forward to other
>> topic:
>> https://github.com/cschneider/streaming-osgi/blob/master/reactortest/src/main/java/reactortest/MqttExampleComponent.java
>>
>> I think there is a lot of potential in Reactor and also in messaging
>> components that do not couple your code to the technology.
>> I would be happy about any feedback on the prototype. Beware the code is not
>> yet split into bundles but I hope the intention is still visible.
>>
>> Best
>>
>> Christian
>>
>> --
>> Christian Schneider
>> http://www.liquid-reality.de
>>
>> Open Source Architect
>> http://www.talend.com
>>
>
>
>
> --
> Zoran Regvart



-- 
Claus Ibsen
-----------------
http://davsclaus.com @davsclaus
Camel in Action 2: https://www.manning.com/ibsen2

Mime
View raw message