public interface ContainerRequestFilter
By default, i.e. if no
name binding is applied
to the filter implementation class, the filter instance is applied globally,
however only after the incoming request has been matched to a particular resource
by the runtime.
If there is a
applied to the filter, the filter will also be executed at the post-match
request extension point, but only in case the matched
resource or sub-resource method is bound to the same name-binding annotation.
In case the filter should be applied at the pre-match extension point,
i.e. before any request matching has been performed by the runtime, the
filter MUST be annotated with a
Use a pre-match request filter to update the input to the matching algorithm, e.g., the HTTP method, Accept header, return cached responses etc. Otherwise, the use of a request filter invoked at the post-match request extension point (after a successful resource method matching) is recommended.
Filters implementing this interface must be annotated with
@Provider to be discovered by the
runtime. Container request filter instances may also be discovered and
dynamically to particular resource methods.
void filter(ContainerRequestContext requestContext) throws java.io.IOException
Filters in the filter chain are ordered according to their
class-level annotation value.
If a request filter produces a response by calling
method, the execution of the (either pre-match or post-match) request filter
chain is stopped and the response is passed to the corresponding response
filter chain (either pre-match or post-match). For example, a pre-match
caching filter may produce a response in this way, which would effectively
skip any post-match request filters as well as post-match response filters.
Note however that a responses produced in this manner would still be processed
by the pre-match response filter chain.
requestContext- request context.
java.io.IOException- if an I/O exception occurs.