security/subsystem/src/main/java/org/jboss/as/security/plugins/JNDIBasedSecurityManagement.java
private AuthenticationManager createAuthenticationManager(String securityDomain) throws Exception {
        int i = callbackHandlerClassName.lastIndexOf(":");
        if (i == -1)
            throw SecurityLogger.ROOT_LOGGER.missingModuleName("default-callback-handler-class-name attribute");
        String moduleSpec = callbackHandlerClassName.substring(0, i);
        String className = callbackHandlerClassName.substring(i + 1);
        Class<?> callbackHandlerClazz = SecurityActions.getModuleClassLoader(loader, moduleSpec).loadClass(className);
        CallbackHandler ch = (CallbackHandler) callbackHandlerClazz.newInstance();

        i = authenticationManagerClassName.lastIndexOf(":");
        if (i == -1)
            throw SecurityLogger.ROOT_LOGGER.missingModuleName("authentication-manager-class-name attribute");
        moduleSpec = authenticationManagerClassName.substring(0, i);
        className = authenticationManagerClassName.substring(i + 1);
        Class<?> clazz = SecurityActions.getModuleClassLoader(loader, moduleSpec).loadClass(className);
        Constructor<?> ctr = clazz.getConstructor(new Class[] { String.class, CallbackHandler.class });
        return (AuthenticationManager) ctr.newInstance(new Object[] { securityDomain, ch });
    }
private AuthenticationManager createAuthenticationManager(String securityDomain) throws Exception {
        int i = callbackHandlerClassName.lastIndexOf(":");
        if (i == -1)
            throw SecurityLogger.ROOT_LOGGER.missingModuleName("default-callback-handler-class-name attribute");
        String moduleSpec = callbackHandlerClassName.substring(0, i);
        String className = callbackHandlerClassName.substring(i + 1);
        Class<?> callbackHandlerClazz = SecurityActions.getModuleClassLoader(loader, moduleSpec).loadClass(className);
        CallbackHandler ch = (CallbackHandler) callbackHandlerClazz.newInstance();

        i = authenticationManagerClassName.lastIndexOf(":");
        if (i == -1)
            throw SecurityLogger.ROOT_LOGGER.missingModuleName("authentication-manager-class-name attribute");
        moduleSpec = authenticationManagerClassName.substring(0, i);
        className = authenticationManagerClassName.substring(i + 1);
        Class<?> clazz = SecurityActions.getModuleClassLoader(loader, moduleSpec).loadClass(className);
        Constructor<?> ctr = clazz.getConstructor(new Class[] { String.class, CallbackHandler.class });
        return (AuthenticationManager) ctr.newInstance(new Object[] { securityDomain, ch });
    }
private AuthenticationManager createAuthenticationManager ( String securityDomain ) throws Exception { int i = callbackHandlerClassName . lastIndexOf ( ":" ) ; if ( i == - 1 ) throw SecurityLogger . ROOT_LOGGER . missingModuleName ( "default-callback-handler-class-name attribute" ) ; String moduleSpec = callbackHandlerClassName . substring ( 0 , i ) ; String className = callbackHandlerClassName . substring ( i + 1 ) ; Class < ? > callbackHandlerClazz = SecurityActions . getModuleClassLoader ( loader , moduleSpec ) . loadClass ( className ) ; CallbackHandler ch = ( CallbackHandler ) callbackHandlerClazz . newInstance ( ) ; i = authenticationManagerClassName . lastIndexOf ( ":" ) ; if ( i == - 1 ) throw SecurityLogger . ROOT_LOGGER . missingModuleName ( "authentication-manager-class-name attribute" ) ; moduleSpec = authenticationManagerClassName . substring ( 0 , i ) ; className = authenticationManagerClassName . substring ( i + 1 ) ; Class < ? > clazz = SecurityActions . getModuleClassLoader ( loader , moduleSpec ) . loadClass ( className ) ; Constructor < ? > ctr = clazz . getConstructor ( new Class [ ] { String . class , CallbackHandler . class } ) ; return ( AuthenticationManager ) ctr . newInstance ( new Object [ ] { securityDomain , ch } ) ; }
Creates an {@code AuthenticationManager}

@param securityDomain name of the security domain
@return an instance of {@code AuthenticationManager}
@throws Exception if creation fails
Creates an { @code AuthenticationManager }