Currently RuntimeDelegate.createEndpoint() is not supported in RESTEasy. This is now required for Java SE environments per the speciication.

2.3.1. Java SE

There are two alternative ways of publishing on Java SE: Creating SE endpoints directly or using the SE
bootstrap API. Both are described in this section.

2.3.1.1. Java SE Endpoint

In a Java SE environment a configured instance of an endpoint class can be obtained using the
createEndpoint method of RuntimeDelegate. The application supplies an instance of Application and the
type of endpoint required. An implementation MAY support zero or more endpoint types of any
desired type.

How the resulting endpoint class instance is used to publish the application is outside the scope of this
specification.