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ConnTag (MQBYTE128)

This is a tag that the queue manager associates with the resources that are affected by the application during this connection. Each application or application instance must use a different value for the tag, so that the queue manager can correctly serialize access to the affected resources. See the descriptions of the MQCNO_*_CONN_TAG_* options for further details. The tag ceases to be valid when the application terminates or issues the MQDISC call.

Note:

Connection tag values beginning with

MQ in upper, lower, or mixed case in either ASCII or EBCDIC are reserved for use by IBM products. Do not use connection tag values beginning with these letters.

Use the following special value if you require no tag:

MQCT_NONE

The value is binary zero for the length of the field.

For the C programming language, the constant MQCT_NONE_ARRAY is also defined; this has the same value as MQCT_NONE, but is an array of characters instead of a string.

This field is used when connecting to a z/OS queue manager. In other environments, specify the value MQCT_NONE.

This is an input field. The length of this field is given by MQ_CONN_TAG_LENGTH. The initial value of this field is MQCT_NONE. This field is ignored if Vis less than MQCNO_VERSION_3.

 

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