@Version(value="1.0.3")
| Interface | Description | 
|---|---|
| Authenticator | The  Authenticatorinterface defines the service interface which
 may be used by applications to enforce requests to be authenticated (seeAuthenticator.login(HttpServletRequest, HttpServletResponse)) or to end enforced
 authentication (seeAuthenticator.logout(HttpServletRequest, HttpServletResponse)). | 
| Exception | Description | 
|---|---|
| NoAuthenticationHandlerException | The  NoAuthenticationHandlerExceptionis thrown to indicate that
 theAuthenticator.login(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)method could not find a way to authenticate the request user. | 
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