Delphi XE FireDac 连接池

  private
    var
      oParams: TStrings;

procedure TSrvMethods.SetupFDManager;    //加载数据库链接信息。
begin
  //*****初始化*****
  oParams := TStringList.Create;
  //********* 连接池
  oParams.Add(‘DriverID=MSSQL‘);
  //oParams.Add(‘CharacterSet=utf8‘);
  oParams.Add(‘Server=192.168.1.199‘);
  //oParams.Add(‘Port=3306‘);
  oParams.Add(‘Database=DSCSYS‘);
  oParams.Add(‘User_Name=sa‘);
  oParams.Add(‘Password=‘);
  //  毫秒
  oParams.Add(‘POOL_CleanupTimeout=36000‘);
  //  毫秒
  oParams.Add(‘POOL_ExpireTimeout=600000‘);
  //最多连接数
  oParams.Add(‘POOL_MaximumItems=60‘);
  oParams.Add(‘Pooled=True‘);
  //*******
  FDManager.Close;
  FDManager.AddConnectionDef(‘MSSQL_DSCSYS‘, ‘MSSQL‘, oParams);
  try
    FDManager.Active := True;
  except
    on E: Exception do
    begin
      frmMain.Log.Error(e.Message, ‘Error‘);
    end;
  end;
end;

procedure TSrvMethods.DSServerModuleCreate(Sender: TObject);
begin
  SetupFDManager;  // 加载数据库链接
end;

function TSrvMethods.QueryData(SQLStr: string): string;
var
  fdqry1: TFDQuery;
  mConn: TFDConnection;
begin
  try
    //***动态创建，用完释放;
    mConn := TFDConnection.Create(nil);
    mConn.ConnectionDefName := ‘MSSQL_Conn‘;
    mConn.Connected := true;
    fdqry1 := TFDQuery.Create(nil);
    try
      fdqry1.Close;
      fdqry1.Connection := mConn;
      fdqry1.SQL.Clear;
      fdqry1.SQL.Add(SQLStr);
      fdqry1.Open();
      result := ‘{result:"OK",DataSet:}‘;
      frmMain.Log.Debug(‘ok‘, ‘debug‘);
    finally
      fdqry1.Free;
      mConn.Free;
    end;
  except
    on E: Exception do
    begin
      result := ‘{Result:"失败 Error:‘ + e.message + ‘"}‘;
      frmMain.Log.Debug(‘NOok‘, ‘debug‘);
    end;
  end;
end;

procedure TSrvMethods.DSServerModuleDestroy(Sender: TObject);
begin
  oParams.Free;
end;