| RE: [equinox-dev] Registering two services in the same bundle |
|
Hi Neil, Thank you for your answer, I agree with you, in the final deployment, I should not be able
to get two interfaces from the same object because in this case it would better
to merge them in another interface3 as you said, I just wanted to ask the
different ways to do that. David De:
equinox-dev-bounces@xxxxxxxxxxx [mailto:equinox-dev-bounces@xxxxxxxxxxx] En
nombre de Neil Bartlett David, While Thomas's suggestion is absolutely correct, I think you
need to step back from the problem a little and ask if this is the right
approach. If your consumer bundle needs the Interface1 service then it
should simply bind to an instance of Interface1. If it also needs the
Interface2 service then it should just bind to Interface2. The consumer should
not *require* both services to be offered by the same object, because this will
severely limit the ability of other producers to offer an alternative
implementation for those services. In other words, you are coupling your
consumer to an implementation detail of the producer which it shouldn't care
about. On the other hand, if your API is such that these interfaces
really should be published and consumed as a unit, then maybe you should just
merge them into one interface, or declare a new Interface3 that extends both
Interface1 and Interface2. Neil On Mon, Nov 16, 2009 at 3:38 PM, David Conde <dconde@xxxxxxxx> wrote: Hi
Thomas, Thank
you for your answer, So
once I get ServiceReference = X getServiceReferences using the filter that you
told me "(&(objectClass=Interface1)(objectClass=Interface2))", I
have to use two castings for getting two different services like Object1 =
(Interface1) BundleContext.getReference (X) and Object2= (Interface2)
BundleContext.getReference(X), and then use two instances of the same object for
using two different interfaces implemented by this same object, am I right? Is
there any other mechanism for using the same object for two different
interfaces, because really the object provides two different services (2
different interfaces) Thank
you in advance David De: equinox-dev-bounces@xxxxxxxxxxx
[mailto:equinox-dev-bounces@xxxxxxxxxxx]
En nombre de Thomas Watson You can use the
registerService(java.lang.String[] clazzes,java.lang.Object service,
java.util.Dictionary properties) to register your service object under multiple
service interfaces. This will allow you to control the registration with a
single ServiceRegistration object. But in order to get a ServiceReference that
is guaranteed to implement both service interfaces then you must use the
getServiceReferences(String clazz, String filter) with a null clazz and a
filter that looks something like this:
|
