Difference between registerglobal(), configure(), configureglobal(),configureglobalsecurity in spring security

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I have below three code snippets all doing the same thing creating in-memory authentication. So how it impacts defining it in different method names?

registerGlobal
configure
configureGlobal
configureGlobalSecurity

ONE

Java

public void registerGlobal(AuthenticationManagerBuilder auth) throws 

Exception {
    auth
    .inMemoryAuthentication()
      .withUser("user").password("password").roles("USER").and()
      .withUser("admin").password("password").roles("USER", 

"ADMIN");
    }
}

TWO

Java

@Override
    protected void configure(AuthenticationManagerBuilder auth)
        throws Exception {
    auth
         .inMemoryAuthentication()
              .withUser("user").password("password").roles

        ("USER");
 }

Three

Java

public void configureGlobal(AuthenticationManagerBuilder auth)
        throws Exception {
    auth
         .inMemoryAuthentication()
              .withUser("user").password("password").roles

     ("USER");
}

FOURTH

<pre lang="java">

@Autowired
public void configureGlobalSecurity(AuthenticationManagerBuilder auth)     throws Exception {
 auth.inMemoryAuthentication().withUser("user").password("user").roles("USER");
}

What I have tried:

Searched spring.io and other blogs but only found usages not explanations

Posted 5-Feb-16 0:03am

Member 12309199

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Member 12309199 · Accepted Answer · 2016-02-05T01:09:00

I renamed the method in my sample project to below and to my surprise it working and authenticating the users.

Java

@Autowired
public void anyMethodName(AuthenticationManagerBuilder auth) throws Exception {
            auth.inMemoryAuthentication().withUser("user").password("user").roles("USER");      
}

You name it anything and it works

The name of the configureGlobal method is not important. However, it is important to only configure AuthenticationManagerBuilder in a class annotated with either @EnableWebSecurity, @EnableWebMvcSecurity, @EnableGlobalMethodSecurity, or @EnableGlobalAuthentication. Doing otherwise has unpredictable results.