Server-side Functions

In OrientDB, you can replace the use of Servlets with server-side functions. For more information on how to call server-side functions, see Functions using the HTTP REST API.

When the HTTP REST protocol calls server-side functions, OrientDB embeds a few additional variables:

• Request Object The HTTP request, implemented by the OHttpRequestWrapper class.
• Response Object The HTTP request response, implemented by the OHttpResponseWrapper class.
• Util Object The utility class with helper functions, to use inside the functions, implemented by the OFunctionUtilWrapper class.

Request Object

OrientDB references this object as request. For instance,

var params = request.getParameters();

Response Object

OrientDB references this object as response. For instance,

var db = orient.getDatabase();
var roles = db.query("select from ORole where name = ?", roleName);
if( roles == null || roles.length == 0 ){
  response.send(404, "Role name not found", "text/plain", "Error: role name not found" );
} else {

  db.begin();
  try{
    var result = db.save({ "@class" : "OUser", name : "Luca", password : "Luc4", "roles" : roles});
    db.commit();
    return result;
  }catch ( err ){
    db.rollback();
    response.send(500, "Error on creating new user", "text/plain", err.toString() );
  }
}

Util Object

OrientDB references this object as util. For instance,

if( util.exists(year) ){
  print("\nYes, the year was passed!");
}