or you can specify the field as final and initialize it with a thread
safe list.
There are actually three ways to handle changes in the list of
FileReaderService services
1) let SCR modify the list
@Reference(cardinality = ReferenceCardinality.AT_LEAST_ONE,
policy=ReferencePolicy.DYNAMIC)
Perhaps you should enable this reference to be dynamic. In your current
configuration it's static which means that resolution of services happens
at the moment the component is instantiated and never beyond that, even if
later services might satisfy it as well.
You probably want something that is
multiple-dynamic-reluctant and multiple-dynamic-greedy have exactly the same
behavior, you could specify either one, i.e. you can leave out the policyOption.
Just to make things more complicated, if you are configuring your component
with config admin and know exactly how many services will
um, multiple and dynamic is greedy anyway, so you don’t need to specify it
explicitly. multiple and static requires specifying greedy explicitly to get
the greedy behavior.
Other than that, I think your explanation is correct.
david jencks
> On Jan 22, 2016, at 7:20 AM, Raymond Auge
One last thing, the field has to be declared volatile. Otherwise, you
get the following error:
Field availableServices in component class org.test.FileReaderFactory
must be declared volatile to handle a dynamic reference
In the end, here is what I use:
@Reference(cardinality =
Hi everyone,
I'm back with my issue for an erratum: the solution I provided does not
completely work. When I use:
@Reference(cardinality = ReferenceCardinality.AT_LEAST_ONE)
private List availableServices;
Only one of the file reader services is inserted in the list. Output of
the code is:
In fact, its worst than that. Both ReferenceCardinality.MULTIPLE and
ReferenceCardinality.AT_LEAST_ONE seem to be randomly failing.
There seems to be some kind of concurrent problem when both services
start at the same time: sometimes both are added to the service list,
sometimes only one.
Hi David,
By looking in Felix SCR source code I found the lines causing the
exception:
// field value type
if ( !m_isMultiple )
{
// value type must not be specified for unary references
if ( m_field_collection_type != null )
{
throw componentMetadata.validationFailure(
Hi everyone,
I have a ComponentException in Felix SCR that I don't understand.
Here is my use case:
1) I have a file reader service that reads a file:
public interface FileReaderService {
/**
* Reads the given file.
* @param filePath Path of the file to read
* @return the
Yes, this is a better place to ask :-)
I don’t see what’s wrong by just looking, I’m hoping to have enough time
shortly to try your code, unless someone else gets there first.
thanks
david jencks
> On Jan 12, 2016, at 11:02 PM, b...@petinou.fr wrote:
>
> Hi everyone,
>
> I have a
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