Question

我正在尝试评估ODAC使用Oracle AQ。请求队列包含这样的JMS对象（但没有换行符和其他空格）：

SYS.AQ$_JMS_BYTES_MESSAGE(
  SYS.AQ$_JMS_HEADER(
    'null','null','null','null','null','null',
    SYS.AQ$_JMS_USERPROPARRAY(
      SYS.AQ$_JMS_USERPROPERTY('Key1',100,'Value1','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key2',100,'Value2','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key3',100,'Value3','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key4',100,'Value4','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key5',100,'Value5','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key6',100,'Value6','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key7',100,'Value7','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key8',100,'Value8','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key9',100,'Value9','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key10',100,'Value10.0','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key11',100,'Value11','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key12',100,'Value12','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key13',100,'Value13','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key14',100,'Value14','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key15',100,'Value15','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key16',100,'Value16','null',27),
      SYS.AQ$_JMS_USERPROPERTY('Key17',100,'Value17','null',27)
    )
  ),
  4168,'null','oracle.sql.BLOB@959acc'
)

我可以接收底层对象（字符串Payload以空字符串形式返回，但TOraObject PayLoad包含数据）。

我正在尝试解散TOraObject PayLoad，并且正在寻找一个将DataType值转换为正确的AttrXxxx [Name]属性调用的表。

    OraType.AttributeCount:4
    OraType.Name:"SYS"."AQ$_JMS_BYTES_MESSAGE"
    OraType.DataType:15
      Attribute[0].Name:HEADER
      Attribute[0].DataType:15
      OraType.AttributeCount:7
      OraType.Name:"SYS"."AQ$_JMS_HEADER"
      OraType.DataType:15
        Attribute[0].Name:REPLYTO
        Attribute[0].DataType:15
        OraType.AttributeCount:3
        OraType.Name:"SYS"."AQ$_AGENT"
        OraType.DataType:15
          Attribute[0].Name:NAME
          Attribute[0].DataType:1
          Attribute[1].Name:ADDRESS
          Attribute[1].DataType:1
          Attribute[2].Name:PROTOCOL
          Attribute[2].DataType:5
        Attribute[1].Name:TYPE
        Attribute[1].DataType:1
        Attribute[2].Name:USERID
        Attribute[2].DataType:1
        Attribute[3].Name:APPID
        Attribute[3].DataType:1
        Attribute[4].Name:GROUPID
        Attribute[4].DataType:1
        Attribute[5].Name:GROUPSEQ
        Attribute[5].DataType:5
        Attribute[6].Name:PROPERTIES
        Attribute[6].DataType:17
        OraType.AttributeCount:1
        OraType.Name:"SYS"."AQ$_JMS_USERPROPARRAY"
        OraType.DataType:17
          Attribute[0].Name:ELEMENT
          Attribute[0].DataType:15
          OraType.AttributeCount:5
          OraType.Name:"SYS"."AQ$_JMS_USERPROPERTY"
          OraType.DataType:15
            Attribute[0].Name:NAME
            Attribute[0].DataType:1
            Attribute[1].Name:TYPE
            Attribute[1].DataType:5
            Attribute[2].Name:STR_VALUE
            Attribute[2].DataType:1
            Attribute[3].Name:NUM_VALUE
            Attribute[3].DataType:5
            Attribute[4].Name:JAVA_TYPE
            Attribute[4].DataType:5
      Attribute[1].Name:BYTES_LEN
      Attribute[1].DataType:5
      Attribute[2].Name:BYTES_RAW
      Attribute[2].DataType:1
      Attribute[3].Name:BYTES_LOB
      Attribute[3].DataType:102

通过反复试验，我到目前为止：

        case DataType of
          102:
            LOB := ObjectPayLoad.AttrAsLob[Name];
          15:
            AttributeOraObject := ObjectPayLoad.AttrAsObject[Name];
          17:
            AttributeOraArray := ObjectPayLoad.AttrAsArray[Name];
          else
          begin
            PayLoadAttributeAsString := ObjectPayLoad. AttrAsString[Name];
            Logger.Log('  "%s"', [PayLoadAttributeAsString]);
          end;
        end;

欢迎提供更完整的清单： - ）

在此之后，我将需要研究相反的方法：生成具有JMS内容的正确TOraObject。也欢迎提示。

- 的Jeroen

Answer 1

修改

ODAC有多个单位定义常数值为102的常量dtOraBlob位于OraClasses单位;定义DataType值的常量以前缀dt开头，无论定义它们的单位如何。

<强>原始我在MemData单元中找到了一些常量：

case DataType of 102: LOB := OraObject.AttrAsLob[Name]; MemData.dtObject: // 15 begin AttributeOraObject := OraObject.AttrAsObject[Name]; LogOraObject(AttributeOraObject, Level+1); end; MemData.dtArray: // 17 begin AttributeOraArray := OraObject.AttrAsArray[Name]; LogOraArray(AttributeOraArray, Level); end; MemData.dtFloat: // 5 begin AttributeFloat := OraObject.AttrAsFloat[Name]; Logger.Log(Prefix+'"%g"', [AttributeFloat]); end; MemData.dtString: // 1 begin PayLoadAttributeAsString := OraObject.AttrAsString[Name]; Logger.Log(Prefix+'"%s"', [PayLoadAttributeAsString]); end; else begin PayLoadAttributeAsString := OraObject.AttrAsString[Name]; Logger.Log(Prefix+'"%s"', [PayLoadAttributeAsString]); end; end;

我找不到102常数，但我很确定它适用于LOB字段。

任何可以确认的人？

- 的Jeroen

Delphi ODAC：从Oracle AQ处理JMS消息

1 个答案: