> like Holger already wrote I think there is no safe way to transport arbitrary graphs over the wire Hm, what do you mean by safe? There are many libraries that can safely serialize/deserialize Java object graphs while correctly keeping references inside the serialized data. The only additional thing needed in the serialization is a context that keeps a list of all objects that are part of it. Why wouldn't this work in an OSGi environment? > Load balancing is an interesting question. CXF DOSGi does not handle this itself. Ok, thanks, so this means cooking your own stuff then. And no MQ-like solutions for remote services, so JMS could be used for the load-balancing? 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 Schneider wrote:
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 <[email protected]>: 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 _______________________________________________ OSGi Developer Mail List [email protected] https://mail.osgi.org/mailman/listinfo/osgi-dev -- -- Christian Schneider http://www.liquid-reality.de <https://owa.talend.com/owa/redir.aspx?C=3aa4083e0c744ae1ba52bd062c5a7e46&UR L=http%3a%2f%2fwww.liquid-reality.de> Open Source Architect http://www.talend.com <https://owa.talend.com/owa/redir.aspx?C=3aa4083e0c744ae1ba52bd062c5a7e46&UR L=http%3a%2f%2fwww.talend.com>
_______________________________________________ OSGi Developer Mail List [email protected] https://mail.osgi.org/mailman/listinfo/osgi-dev
