In this tutorial we will create A Simple User CURD service.

classmap UserItem User {
[
  target_path     : "." ;
  class_mgr       : UserMgr ;
  class_http_mgr  : UserHttpMgr ;
  dispatch_method : uri ;
  mode_debug : 1;
  class_validator : CSHttpFormValidator MinLen,MaxLen,RangLen,Number,Mobile,StartWith,GTE,EQ,LTE,GT,LT ;
  sql_connection  : "server=127.0.0.1,username=test,password=test,database=test" ;

 app_info       : [
    service_name  : "UserServ";
    service_desc  : "User CRUD Service";
    service_comment: "";
    service_port  : "8001";
    service_platform: "linux";

    file_cfg   : "/etc/userserv.ini";
    file_pid   : "/var/run/userserv.pid";

   cron_enable : 0;

  cmd_limitips : "127.0.0.1";
 status_enable : 1;
 unload_enable : 1;
    log_enable : 1;
    log_file   : "userlog";
    log_path   : "/var/log/user";

    run_user   : root;
    run_group  : root;

    db_server  : "127.0.0.1";
    db_port    : "3306";
    db_username: "test";
    db_userpwd : "test";
    db_name    : "test";
  ];
  error_codes  : [

    // 
    'API_REQUEST_INVALID'                    => array(99001, "request invalid"),
    'API_REQUEST_EXPIRED'                    => array(99002, "request expired"),
    'API_REQUEST_AUTHORIZED_FAILED'          => array(99003, "unauthorized"),
    'API_OPERATION_UNDEFINED'                => array(99999, "undefined request"),
    'API_NO_RECODE'                          => array(99004, "has no record"),
  ];
]

User : users {
[ ("Users Info")
  comment   : "User Info"
  fields_list  : "id,username,useremail,addtime,status" ;
  fields_create: "username,useremail" ;
  fields_update: "" ;
  field_id     : id ;
  http_method  : "user"
   C
   R
   U
   D; 
]
  // Class Field   [JSON Field]    (HTTP Param)    , Table Field     : Field Type (IDX Type) 
  id              [id]            (id)            ,id             :int   (id);
  ("User Name")
  username        [username]      (username)       ,username        :string(key);
  ("User Email")
  useremail       [useremail]     (useremail)      ,useremail       :string(key);
  ("User Add Time")
  addtime         [addtime]       (addtime)        ,addtime         :idate;
  ("User Status")
  status          [status]        (status)        ,status         :int   ;
}

use the REST Service Code Helper we got these server side files:

  UserItem.h
  UserItem.cpp
  UserMgr.h
  UserMgr.cpp
  UserHttpMgr.h
  UserHttpMgr.cpp
  UserServ.cpp
  AppServerDefs.h
  Makefile
  start.sh
  stop.sh

Modify Makefile set the correct include path and library path.
execute

  make

get the UserServ,
execute

  ./start.sh