AuthenticationEntryPoint (spring-security-docs-manual 5.5.3 API)

All Known Implementing Classes:

BasicAuthenticationEntryPoint, BearerTokenAuthenticationEntryPoint, CasAuthenticationEntryPoint, DelegatingAuthenticationEntryPoint, DigestAuthenticationEntryPoint, Http403ForbiddenEntryPoint, HttpStatusEntryPoint, LoginUrlAuthenticationEntryPoint
```
public interface AuthenticationEntryPoint
```
Used by ExceptionTranslationFilter to commence an authentication scheme.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`commence(javax.servlet.http.HttpServletRequest request, javax.servlet.http.HttpServletResponse response, AuthenticationException authException)`	Commences an authentication scheme.

- Method Detail
  - commence
```
void commence(javax.servlet.http.HttpServletRequest request,
              javax.servlet.http.HttpServletResponse response,
              AuthenticationException authException)
       throws java.io.IOException,
              javax.servlet.ServletException
```
    Commences an authentication scheme.
    ExceptionTranslationFilter will populate the HttpSession attribute named AbstractAuthenticationProcessingFilter.SPRING_SECURITY_SAVED_REQUEST_KEY with the requested target URL before calling this method.
    Implementations should modify the headers on the ServletResponse as necessary to commence the authentication process.
    
    Parameters:
    
    request - that resulted in an AuthenticationException
    
    response - so that the user agent can begin authentication
    
    authException - that caused the invocation
    
    Throws:
    
    java.io.IOException
    
    javax.servlet.ServletException