[keycloak-user] Adapter workflow

HI, When a secured restful URL is hit in the browser,  this request will reach the web server ,say wildlfy, first and then touch the keycloak for authentication.  I am debugging a wildfly8 adapter to try to understand this workflow. I want to intercept at the moment before adapter to send request to keycloak. I don't know where to set a  breakpoint . I have tried several places in  the keycloak.adapter.core package but failed.   Thanks. Mai