WebModule in Delphi SOAP Application Server - database

Question

Given that the each request message spawns a separate thread, and separate instances of the Web module and its contents are created dynamically for each thread, I added a FDConnection and FDQuery to the webmodule so that I can send a personnel profile from the database to the requester upon request.
How can I access a web module instance?
In the web module there is only one variable of the web module metaclass :
var
WebModuleClass: TComponentClass = TWebModule1;
for example:
WebModule.FDQuery.Close;
The CountryImpl unit is implementation of CountryIntf service
unit CountryImpl;
interface
uses Soap.InvokeRegistry, System.Types, Soap.XSBuiltIns, uCountry, CountryIntf,
WebModuleUnit1;
type
TCountryManager = class(TInvokableClass, ICountryManager)
public
function GetCountry(ACountryId: integer): TCountry;
end;
implementation
{ TCountry }
function TCountryManager.GetCountry(ACountryId: integer): TCountry;
begin
WebModule.FDQuery.Close;
WebModule.FDQuery.ParamByName('Id').Value := ACountryId;
WebModule.FDQuery.Open;
end;
initialization
InvRegistry.RegisterInvokableClass(TCountryManager);
end.

Answer 1

Your assumption is incorrect: Only 1 instance of the webmodule is created in the SOAP server application. You should not add thread-specific functionality to the webmodule, you must add it to the CountryImp.pas. Since there is no design-surface there, you have to do runtime instantiation of FDConnection(s) and FDQueries in the functions in that unit.