MessageType

This instance property specifies the type of queue table associated with this queue.

Declaration

// C#
public OracleAQMessageType MessageType {get; set;}

Property Value

An OracleAQMessageType enumerated value.

Exceptions

ArgumentOutOfRangeException - The type value specified is invalid.

ObjectDisposedException - The object is already disposed.

Remarks

The MessageType property also dictates the type of message payloads that are enqueued or dequeued from the queue. It is possible to enqueue a variety of payloads depending on the MessageType.

Table 12-27 lists the allowed payload types for various message types.

Table 12-27 Message Types and Payloads

OracleAQQueue.MessageType	Allowed OracleAQMessage.Payload type to Enqueue
`OracleAQMessageType.Raw`	`OracleBinary`, `byte[]`
`OracleAQMessageType.Xml`	`OracleXmlType`, `XmlReader`, `String` (well-formed XML, else exception is raised)
`OracleAQMessageType.UDT`	`UDT` Custom Object

Table 12-28 lists the payload types for dequeued messages.

Table 12-28 Payload Types for Dequeued Messages

OracleAQQueue.MessageType	DequeueOptions.ProviderSpecificType	OracleAQMessage.Payload of dequeued message
`OracleAQMessageType.Xml`	`true`	`OracleXmlType`
`OracleAQMessageType.Xml`	`false`	`XmlReader`
`OracleAQMessageType.Raw`	`true`	`OracleBinary`
`OracleAQMessageType.Raw`	`false`	`Byte[]`
`OracleAQMessageType.UDT`	N.A.	`UDT` Custom Object