Hi Mike,
On 2/28/2014 7:48 AM, Mike Wilson wrote:
> like Holger already wrote I think there is no safe way to transport arbitrary
graphs over the wire
<stuff deleted>
And no MQ-like solutions for remote services, so JMS could be used for
the load-balancing?
ECF has a JMS provider as well as support for other mq protocols...e.g.
mqtt [1]. We have plans to create others (e.g. possibly zeromq, rabbitmq).
We have used the JMS provider to do load balancing examples [2].
Scott
[1] https://github.com/ECF
[2] https://wiki.eclipse.org/Load_Balancing_Remote_Services
Hm, this makes me think of EJB. Are there any OSGi-friendly EJB
implementations that could provide service access over JMS?
Best regards
Mike
Christian Schneiderwrote:
Hi Mike,
I think almost all remoting solutions will require your data to be
in a kind a tree form. This can be considered a smell as it may
require conversions between your inner domain model which probably
has cycles and the data sent over the wires which may not have them.
In fact though like Holger already wrote I think there is no safe
way to transport arbitrary graphs over the wire. So you most
probably will have to cope with this.
Load balancing is an interesting question. CXF DOSGi does not
handle this itself. It will simply provide all available endpoints
as OSGi services. So this provides at least failover and you can
add load balancing based on these local services if you like.
Christian
2014-02-28 10:28 GMT+01:00 Mike Wilson <mike...@hotmail.com
<mailto:mike...@hotmail.com>>:
We're doing remote calls between OSGi containers on different
servers and I'm looking at Remote Services to do the job. I've
noticed that Apache CXF/DOSGi
http://cxf.apache.org/distributed-osgi is the reference
implementation.
DOSGi's distribution provider is based on SOAP so it
seems this implementation will limit the expressiveness in
data transferred as arguments and return values, such as
duplicating objects that are referenced more than once and not
supporting cycles at all.
Can you recommend any Remote Service distribution provider
implementations that offer better support for keeping
"referential integrity" within the data transferred to the
remote server?
Bonus question: What's a good setup for load balancing Remote
Service calls between multiple remote servers?
Thanks
Mike Wilson
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Christian Schneider
http://www.liquid-reality.de
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Open Source Architect
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