Hello, Christian. Thank you very much for detailed answers and great tutorial!
I have one question - Does blueprint support scopes - I need new instance of service for every consumer? >Понедельник, 20 июля 2015, 9:24 +02:00 от Christian Schneider ><[email protected]>: > > > >Am 20.07.2015 um 07:33 schrieb Alex Sviridov: >> >> I have a few questions (I found some information but I'm afraid it is old): >> >> >> 2) Does blueprint support generating xml files via annotations like DS. If >> yes, then what maven plugin should we use >There is a blueprint-maven-plugin from aries. It supports using JEE >annotations for most of the functionality of blueprint. >Basically the goal is to provide annotations for blueprint that are as >compatible to JEE as possible so people who learned JEE feel at home. >http://aries.apache.org/modules/blueprint-maven-plugin.html >The example below shows a small application that uses just annotations. >In practice you can also add hand written blueprint for things the >plugin does not cover (like e.g. CXF integration). >http://www.liquid-reality.de/display/liquid/2015/03/05/Apache+Karaf+Tutorial+Part+9+-+Annotation+based+blueprint+and+JPA > >The plugin works quite well and is already used in production at one of >our customers. The scope of the plugin is limited a bit though. >For example it already supports simple transaction and jpa injections >but it is not yet compatible to Aries JPA 2. >I will probably need to introduce some extension support for the plugin >so people can extend it to support other blueprint namespaces. > >So I encourage you to try it out and see if it fits your current needs. >As the code of the plugin is quite small you can also just fork it to >adapt to your internal needs >if something does not work like you want. In that case I would be happy >about feedback or even pull requests so I can add such impovements to >the aries version. > >> 3) What is the influence of using proxies for every service on performance >> in comparison with DS? >There is not much performance overhead for proxies. As your service >calls should not be extremely fine grained anyway I do not think you >will notice a problem. >The problem with proxies is more in some other regards. For example >blueprint blocks a service call if a mandatory service goes away. So if >your business code needs to guarantee short response times >this may speak against blueprint. >Proxies also make debugging harder as you often hit the proxy impl code >while stepping thorugh your code. > >> 4) Could anyone provide a link to example of using blueprint of last version? >You can have a look at my Karaf Tutorials. They cover many blueprint >features as well as some of the integrations to other frameworks >blueprint provides. >Starting with my newest Tutorial I will also provide more examples of >DS. My goal is to look into things like security, REST, SOAP. >http://www.liquid-reality.de/display/liquid/Karaf+Tutorials > >Christian > > >--------------------------------------------------------------------- >To unsubscribe, e-mail: [email protected] >For additional commands, e-mail: [email protected] > -- Alex Sviridov
