2.2.4.2.4 XAUSER_CONTROL_MTAG_RECOVER
The XAUSER_CONTROL_MTAG_RECOVER message discovers which XA transactions need recovery.
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MsgHeader (24 bytes) |
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RequestFlags |
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totalUOWsRequested |
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MsgHeader (24 bytes): This field MUST contain a MESSAGE_PACKET structure:
The dwUserMsgType field MUST be 0x00004003.
The dwcbVarLenData field MUST be 8.
RequestFlags (4 bytes): Flags that control the scan performed by the Transaction Manager for XA transactions in need of recovery. It MUST be a bitwise OR operator of one or more the following flags.
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Value
Meaning
XARECOVER_START_SCAN
0x00000001
The Transaction Manager MUST begin a new session to scan for transactions in need of recovery.
XARECOVER_END_SCAN
0x00000002
The Transaction Manager MUST end the current session being used to scan for transactions in need of recovery.
XARECOVER_CONTINUE_SCAN
0x00000004
The Transaction Manager MUST continue the current session being used to scan for transactions in need of recovery. This flag is assumed to be set if no other flag is set.
totalUOWsRequested (4 bytes): A 32-bit unsigned integer that MUST contain the requested number of XA transactions that need recovery. This value SHOULD be less than or equal to 5.<3>