delphi - Delphi 中同一服务的多个实例

Question

我有一个用delphi制作的旧Windows服务，现在必须在同一台服务器上多次安装，我正在尝试更改代码，以便我能够在安装服务时更改服务名称，但我无法使其工作。

我找到一些信息here和一些here关于它，在研究了帖子并进行必要的修改后，我能够安装两个具有不同名称的服务，但是服务无法启动。

我发布了负责控制下面服务的类(继承了 TService)，我知道代码相当多，但我真的很感激任何帮助。

procedure ServiceController(CtrlCode: DWord); stdcall;
begin
  tvdAvalancheDataCenterService.Controller(CtrlCode);
end;
function TtvdAvalancheDataCenterService.GetServiceController: TServiceController;
begin
  Result := ServiceController;
end;
procedure TtvdAvalancheDataCenterService.ServiceLoadInfo(Sender : TObject);
begin
  Name := ParamStr(2);
  DisplayName := ParamStr(3);
end;
procedure TtvdAvalancheDataCenterService.ServiceBeforeInstall(Sender: TService);
begin
  ServiceLoadInfo(Self);
end;
procedure TtvdAvalancheDataCenterService.ServiceCreate(Sender: TObject);
begin
  ServiceLoadInfo(Self);
end;
procedure TtvdAvalancheDataCenterService.ServiceStart(Sender: TService;
  var Started: Boolean);
begin
  FtvdTrayIcon := TtvdEnvoyTrayIcon.Create(Self);
  SetServiceDescription;
  FtvdDataCenter.tvdActive := true;
end;
procedure TtvdAvalancheDataCenterService.ServiceStop(Sender: TService;
  var Stopped: Boolean);
begin
  FreeAndNil(FtvdTrayIcon);
  FtvdDataCenter.tvdActive := False;
end;
procedure TtvdAvalancheDataCenterService.ServiceAfterInstall(Sender: TService);
begin
   SetServiceDescription;
end;
procedure TtvdAvalancheDataCenterService.SetServiceDescription;
var
  aReg: TRegistry;
begin
  if FDescriptionUpdated then
    Exit;
  aReg := TRegistry.Create(KEY_READ or KEY_WRITE);
  try
    aReg.RootKey := HKEY_LOCAL_MACHINE;
    if aReg.OpenKey(cnRegKey+ Name, true) then
    begin
      aReg.WriteString('Description', cnServiceDescription);
      aReg.CloseKey;
    end;
    FDescriptionUpdated:= True;
  finally
    aReg.Free;
  end;
end;

我使用的是Delphi XE，该服务需要在Windows服务中运行。

提前致谢

Answer 1

由于服务不知道它在安装时收到的名称，因此您可以将该名称作为参数提供到其 ImagePath 注册表值中。

这是多个实例的基本服务框架:

unit u_svc_main;

interface

uses
  Winapi.Windows,
  System.Win.Registry,
  System.SysUtils,
  System.Classes,
  Vcl.Dialogs,
  Vcl.SvcMgr;

type
  TSvc_test = class(TService)
    procedure ServiceAfterInstall(Sender: TService);
    procedure ServiceBeforeInstall(Sender: TService);
    procedure ServiceCreate(Sender: TObject);
    procedure ServiceBeforeUninstall(Sender: TService);
  private
    { Private declarations }
    procedure GetServiceName;
    procedure GetServiceDisplayName;
  public
    function GetServiceController: TServiceController; override;
    { Public declarations }
  end;

var
  Svc_test: TSvc_test;

implementation

{$R *.dfm}
procedure TSvc_test.GetServiceDisplayName;

var
  ServiceDisplayName : String;

begin
 if not FindCmdLineSwitch('display', ServiceDisplayName) then
  raise Exception.Create('Please specify the service displayname with /display switch');
 DisplayName := ServiceDisplayName;
end;

procedure TSvc_test.GetServiceName;

var
  ServiceName : String;

begin
 if not FindCmdLineSwitch('name', ServiceName) then
  raise Exception.Create('Please specify the service name with /name switch');
 Name := ServiceName;
end;

procedure ServiceController(CtrlCode: DWord); stdcall;
begin
  Svc_test.Controller(CtrlCode);
end;

function TSvc_test.GetServiceController: TServiceController;
begin
  Result := ServiceController;
end;

procedure TSvc_test.ServiceAfterInstall(Sender: TService);

var
  Reg       : TRegistry;
  ImagePath : String;

begin
 Reg := TRegistry.Create(KEY_READ OR KEY_WRITE);
 try
  Reg.RootKey := HKEY_LOCAL_MACHINE;
  if Reg.OpenKey('SYSTEM\CurrentControlSet\Services\'+Name, False) then
   begin
    // set service description
    Reg.WriteString('Description', 'Multi instance test for service '+Name);
    // add name parameter to ImagePath value
    ImagePath := ParamStr(0) + ' /name '+Name;
    Reg.WriteString('ImagePath', ImagePath);
    Reg.CloseKey;
   end;
 finally
  Reg.Free;
 end;
end;

procedure TSvc_test.ServiceBeforeInstall(Sender: TService);
begin
 GetServiceName;
 GetServiceDisplayName;
end;

procedure TSvc_test.ServiceBeforeUninstall(Sender: TService);
begin
 GetServiceName;
end;

procedure TSvc_test.ServiceCreate(Sender: TObject);
begin
 if not Application.Installing then
  GetServiceName;
end;

end.

服务安装:

<path1>\MyService.Exe /install /name "test1" /display "test instance1"
<path2>\MyService.Exe /install /name "test2" /display "test instance2"

服务删除:

<path1>\MyService.Exe /uninstall /name "test1" 
<path2>\MyService.Exe /uninstall /name "test2"