エコーストリングとリバースストリングのサンプル メソッドを使用して、Delphi XE8 のウィザードで単純な DataSnap クライアント/サーバー アプリケーションを作成しました。サーバー dpr に "ReportMemoryLeaksOnShutdown := True" を配置し、クライアントから echostring および/または reversestring メソッドを呼び出すと、結果は良好ですが、(クライアントを閉じた後に) サーバー アプリケーションを閉じると、常に 2 つ以上の不明なメモリが発生します。漏れます。これは、インターネットで見つけられない既知のバグですか、それとも解決策はありますか?
サーバーコード:
unit ServerMethodsUnit;
interface
uses System.SysUtils, System.Classes, System.Json,
Datasnap.DSServer, Datasnap.DSAuth, DataSnap.DSProviderDataModuleAdapter;
type
{$METHODINFO ON}
TServerMethods = class(TDataModule)
private
{ Private declarations }
public
{ Public declarations }
function EchoString(Value: string): string;
function ReverseString(Value: string): string;
end;
{$METHODINFO OFF}
implementation
{%CLASSGROUP 'FMX.Controls.TControl'}
{$R *.dfm}
uses System.StrUtils;
function TServerMethods.EchoString(Value: string): string;
begin
Result := Value;
end;
function TServerMethods.ReverseString(Value: string): string;
begin
Result := System.StrUtils.ReverseString(Value);
end;
end.
dfm
object ServerContainer: TServerContainer
OldCreateOrder = False
Height = 271
Width = 415
object DSServer1: TDSServer
Left = 96
Top = 11
end
object DSTCPServerTransport1: TDSTCPServerTransport
Server = DSServer1
Filters = <>
Left = 96
Top = 73
end
object DSServerClass1: TDSServerClass
OnGetClass = DSServerClass1GetClass
Server = DSServer1
Left = 200
Top = 11
end
end
dfm プロジェクト ファイル
program DataSnap_Server;
uses
FMX.Forms,
Web.WebReq,
IdHTTPWebBrokerBridge,
ServerMainForm in 'ServerMainForm.pas' {Form2},
ServerMethodsUnit in 'ServerMethodsUnit.pas' {ServerMethods: TDataModule},
ServerContainerUnit in 'ServerContainerUnit.pas' {ServerContainer: TDataModule};
{$R *.res}
begin
ReportMemoryLeaksOnShutdown := True;
Application.Initialize;
Application.CreateForm(TForm2, Form2);
Application.CreateForm(TServerContainer, ServerContainer);
Application.Run;
end.
クライアント側コード生成ソース
//
// Created by the DataSnap proxy generator.
// 14-5-2015 22:45:56
//
unit ClientClassesUnit;
interface
uses System.JSON, Data.DBXCommon, Data.DBXClient, Data.DBXDataSnap, Data.DBXJSON, Datasnap.DSProxy, System.Classes, System.SysUtils, Data.DB, Data.SqlExpr, Data.DBXDBReaders, Data.DBXCDSReaders, Data.DBXJSONReflect;
type
TServerMethodsClient = class(TDSAdminClient)
private
FEchoStringCommand: TDBXCommand;
FReverseStringCommand: TDBXCommand;
public
constructor Create(ADBXConnection: TDBXConnection); overload;
constructor Create(ADBXConnection: TDBXConnection; AInstanceOwner: Boolean); overload;
destructor Destroy; override;
function EchoString(Value: string): string;
function ReverseString(Value: string): string;
end;
implementation
function TServerMethodsClient.EchoString(Value: string): string;
begin
if FEchoStringCommand = nil then
begin
FEchoStringCommand := FDBXConnection.CreateCommand;
FEchoStringCommand.CommandType := TDBXCommandTypes.DSServerMethod;
FEchoStringCommand.Text := 'TServerMethods.EchoString';
FEchoStringCommand.Prepare;
end;
FEchoStringCommand.Parameters[0].Value.SetWideString(Value);
FEchoStringCommand.ExecuteUpdate;
Result := FEchoStringCommand.Parameters[1].Value.GetWideString;
end;
function TServerMethodsClient.ReverseString(Value: string): string;
begin
if FReverseStringCommand = nil then
begin
FReverseStringCommand := FDBXConnection.CreateCommand;
FReverseStringCommand.CommandType := TDBXCommandTypes.DSServerMethod;
FReverseStringCommand.Text := 'TServerMethods.ReverseString';
FReverseStringCommand.Prepare;
end;
FReverseStringCommand.Parameters[0].Value.SetWideString(Value);
FReverseStringCommand.ExecuteUpdate;
Result := FReverseStringCommand.Parameters[1].Value.GetWideString;
end;
constructor TServerMethodsClient.Create(ADBXConnection: TDBXConnection);
begin
inherited Create(ADBXConnection);
end;
constructor TServerMethodsClient.Create(ADBXConnection: TDBXConnection; AInstanceOwner: Boolean);
begin
inherited Create(ADBXConnection, AInstanceOwner);
end;
destructor TServerMethodsClient.Destroy;
begin
FEchoStringCommand.DisposeOf;
FReverseStringCommand.DisposeOf;
inherited;
end;
end.
独自のソース
unit ClientMainForm;
interface
uses
Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls;
type
TForm1 = class(TForm)
Button1: TButton;
Edit1: TEdit;
Button2: TButton;
Label1: TLabel;
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
uses
ClientModuleUnit;
procedure TForm1.Button1Click(Sender: TObject);
begin
Label1.Caption := ClientModule.ServerMethodsClient.EchoString(Edit1.Text);
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Label1.Caption := ClientModule.ServerMethodsClient.ReverseString(Edit1.Text);
end;
end.