Hey Karel,
Sorry to go further than the original question, but seeing as my question
is related to exactly the same thing, maybe you can help me understand it
better.
Using the exact same example as the in the initial post, if I don't put
immediate=true, it won't bind all of the services get created at startup or
get added during the runtime. Is there a reason why it has to be immediate
= true?
I also tried it by using the following notation, and then this it doesn't
even bind any of services:
@Reference(cardinality = ReferenceCardinality.MULTIPLE, policy =
ReferencePolicy.DYNAMIC)
private List<StateMachine> stateMachines = new CopyOnWriteArrayList<>();
Greetings,
Roy
On 28 Nov 2016, at 21:39, Karel Haeck <[email protected]> wrote:
Nicolas,
the spec does not specify that static references should be injected
before dynamic,
but it does specify that references must be processed in sequence as
specified in the component xml:
"When binding services, the references are processed in the order in
which they are specified in the
component description. That is, target services from the first specified
reference are bound before
services from the next specified reference."
In addition the spec specifies how @Reference annotations are ordered:
" In the generated Component Description for a component, the references
must be ordered in ascending
lexicographical order (using String.compareTo ) of the reference names."
Note that the default name is based on the field or method name. In your
case get aclService for the static reference
and "" (empty string) for the dynamic reference as spec states that the
add , bind or set prefix is removed.
( Actually if one uses Java naming conventions the event methods will
have names starting with an upper case character and precede the field
references).
By specifying e.g. @Reference( name = "zStateMachine", cardinality =
ReferenceCardinality.MULTIPLE, policy = ReferencePolicy.DYNAMIC)
the static reference should be bound first.
Note that there is still a potential race condition between the add and
an activate method if present,
or between two concurrent add() executions.
regards,
Karel
On 28/11/2016 12:09, Nicolas Brasey wrote:
Hi,
I have a bind order issue with a component that has :
1) A static reference specified with annotation @Reference on the
private
field
2) A dynamic multiple reference specificed with annotation on a method
The static reference is not bound before the dynamic ones.
The code looks like this:
@Component(immediate = true)
public class MyServiceImpl implements MyService {
@Reference
private AclService aclService;
@Reference(
cardinality = ReferenceCardinality.MULTIPLE,
policy = ReferencePolicy.DYNAMIC
)
public void add(StateMachine stateMachine) {
....
....
}
According to the Declarative Service specifications, the static
references
should always be injected before the activate method.
Does anyone have any idea what might be wrong ?
My env is Apache Karaf 4.0.5 with Felix SCR 2.0.2
Thanks for you help!
Nicolas
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