Question

我正在尝试构建一个作为Windows服务运行的DataSnap Rest应用程序，但该向导只有“独立的VCL应用程序”，“独立的控制台应用程序”和“ISAPI动态链接库”（我是使用Delphi XE2企业）。有人可以帮助我。感谢。

Answer 1

如果DataSnap REST向导可以选择创建Windows服务（如何运行应用程序服务器？）会更方便，但是你可以通过一些小问题解决它。

我第一次遇到这个问题时，我创建了一个常规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服务器复制到服务中。只需确保该服务的输出目录与VCL应用程序的目录相同。

服务的.dpr可能如下所示：

program Service;

uses
  Vcl.SvcMgr,
  Web.WebReq,
  IdHTTPWebBrokerBridge,
  WebModuleUnit1 in '..\GUI\WebModuleUnit1.pas' {WebModule1: TWebModule},
  ServerMethodsUnit1 in '..\GUI\ServerMethodsUnit1.pas' {ServerMethods1: TDSServerModule},
  ServerContainerUnit1 in '..\GUI\ServerContainerUnit1.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.

服务的主要部分可能如下所示：

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.

DataSnap Rest Server Windows服务

1 个答案: