DatasNap REST服务器Windows服务

Question

我尝试构建作为Windows服务运行的DataSnap Rest应用程序，但是向导只有"独立的VCL应用程序"，"独立控制台应用程序"one_answers" ISAPI）动态链接库"（我正在使用Delphi XE2 Enterprise）。有人可以帮助我。谢谢。

Answer 1

如果DatasNap REST向导可以选择创建Windows服务（您还可以如何运行应用程序服务器？），则可以更方便摆弄。

我第一次遇到此操作时，我创建了一个常规的DataSnap Rest服务器作为VCL应用程序和常规Windows服务，并将相关部分从REST服务器复制到服务。只需确保服务的输出目录与VCL应用程序的目录相同。

服务的.dpr可能看起来像这样：

program Service;
uses
  Vcl.SvcMgr,
  Web.WebReq,
  IdHTTPWebBrokerBridge,
  WebModuleUnit1 in '..GUIWebModuleUnit1.pas' {WebModule1: TWebModule},
  ServerMethodsUnit1 in '..GUIServerMethodsUnit1.pas' {ServerMethods1: TDSServerModule},
  ServerContainerUnit1 in '..GUIServerContainerUnit1.pas' {ServerContainer1: TDataModule},
  Unit1 in 'Unit1.pas' {Service1: TService};
{$R *.RES}
begin
  if not Application.DelayInitialize or Application.Installing then
    Application.Initialize;
  if WebRequestHandler <> nil then
    WebRequestHandler.WebModuleClass := WebModuleClass;
  Application.CreateForm(TService1, Service1);
  Application.Run;
end.

该服务的主要单元可能看起来像这样：

unit Unit1;
interface
uses
  Winapi.Windows, Winapi.Messages, System.SysUtils, System.Classes,
  Vcl.Graphics, Vcl.Controls, Vcl.SvcMgr, Vcl.Dialogs,
  IdHTTPWebBrokerBridge, Web.HTTPApp;
type
  TService1 = class(TService)
    procedure ServiceCreate(Sender: TObject);
    procedure ServiceExecute(Sender: TService);
    procedure ServiceStart(Sender: TService; var Started: Boolean);
    procedure ServiceStop(Sender: TService; var Stopped: Boolean);
  private
    FServer: TIdHTTPWebBrokerBridge;
    procedure TerminateThreads;
  public
    function GetServiceController: TServiceController; override;
  end;
var
  Service1: TService1;
implementation
{$R *.DFM}
uses
  //Datasnap.DSService;  // XE2
  Datasnap.DSSession;  // XE3
procedure ServiceController(CtrlCode: DWord); stdcall;
begin
  Service1.Controller(CtrlCode);
end;
{ TService1}
function TService1.GetServiceController: TServiceController;
begin
  Result := ServiceController;
end;
procedure TService1.ServiceCreate(Sender: TObject);
begin
  FServer := TIdHTTPWebBrokerBridge.Create(Self);
end;
procedure TService1.ServiceExecute(Sender: TService);
begin
  while not Terminated do
  begin
    Sleep(1000);
    ServiceThread.ProcessRequests(False);
  end;
end;
procedure TService1.ServiceStart(Sender: TService; var Started: Boolean);
begin
  if not FServer.Active then
  begin
    FServer.Bindings.Clear;
    FServer.DefaultPort := 8080;
    FServer.Active := True;
  end;
end;
procedure TService1.ServiceStop(Sender: TService; var Stopped: Boolean);
begin
  TerminateThreads;
  FServer.Active := False;
  FServer.Bindings.Clear;
  ServiceThread.Terminate;
end;
procedure TService1.TerminateThreads;
begin
  if TDSSessionManager.Instance <> nil then
    TDSSessionManager.Instance.TerminateAllSessions;
end;
end.