Java Reference
In-Depth Information
To manually bind a filter or interceptor to a resource method, the filter or interceptor class must be denoted
with an @NameBinding annotation. An @NameBinding annotation can be coded just like a standard annotation, but
the annotation implementation should also include the @NameBinding annotation in its interface. The following
annotation code could be used to create an @NameBinding annotation that might be placed on a filter that is
responsible for firing alerts:
@Target({ ElementType.TYPE, ElementType.METHOD })
@Retention(value = RetentionPolicy.RUNTIME)
public @interface Alerter { }
To associate the @NameBinding with a filter or interceptor, simply annotate the filter or interceptor class with it.
The following AlertFilter class is a filter implementation that is denoted with the @Alerter annotation:
class AlertFilter implements ContainerRequestFilter,
ContainerResponseFilter {
That filter can now be bound to a resource method by annotating the resource method with the same @
NameBinding as the filter class, as demonstrated here:
public String getJobs(){
this same concept can be applied to Application subclasses in order to globally bind the filter or interceptor.
Setting Priorities
As mentioned in the previous sections, filters and interceptors can be chained. Chains of filters or interceptors invoke
individual filters or interceptors based upon a given priority. To assign priority to a filter or interceptor, denote the
implementation class with the @Priority annotation. The Priorities class in JAX-RS is used to specify the type of
priority that needs to be set. There are built-in priorities for security, header decorators, decoders, and encoders.
In the following example, the priority of a filter, the AlertFilter that was introduced in the previous section, is set to
a priority of Priorities.USER :
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