Hi,
On 15 May 2014 at 20:26:49, MV ([email protected]) wrote:
Hello,
I am trying to use DI with Spring and Akka actors. I found the template example
at TypesafeActivator but I had question for a case that is not working for me.
The example uses AnnotationBased DI and I would like to use XMl based for the
following reason:
I have two algorithm implementations for my project which project my results to
the end user in different formats. The algorithms are also significantly
different and I have a single JAVA interface that these 2 algorithms implement.
I don't prefer the annotation based binding because I want the tester during
integration testing to change the algorithm we use in an XML file or property
file because if the chnage is done in a JAVA file, it warrants a new release of
software version at the Integration test site. I want the tester to be able to
run the jar with different algorithms based on an external XML/ java properties
file.
Qn 1) The example on the website to create the actor system and Props uses Java
annotation technique. How do I convert that to a regular <bean>....</bean> kind
of thing?
If you don't want to convert everything, then you can mix annotations and XML
by adding this to your spring context before you call refresh().
XmlBeanDefinitionReader xmlReader = new XmlBeanDefinitionReader(ctx);
xmlReader.loadBeanDefinitions("spring.xml");
If you do want to convert everything, then I guess you would just have to wire
the things up by hand in the same way that they are wired by the annotations.
Qn 2) I want to create a few actors as simple UntypedActors and few Actors as
ConsistentHashingRouter where the number of workers comes from a Java
Properties file. Is this as simple as having another props() method? How can I
translate this props() method to an XML format so that I can make it follow the
way I want to in Qn (1). As of now, I do not want a mix of dependency injection
techniques and would like to stick to one format.
So the props method doesn't care how you wired up your beans, it only looks up
a named bean. Configuration of akka is usually done in code or in the
application.conf file described in the documentation. If you would want full
control of that from Spring, then you would probably have to add another props
method, that looks up some named configuration bean that tells you which router
add with which router configuration.
B/
Any help will be really appreciated because I am a novice to Spring DI with
Akka actors.
Thanks in advance,
Meena Venkat
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