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mathilda · Posted: Tue Jun 29, 2010 1:57 pm Post subject:

Hello,
i have some problem with segmentation and grouping when using Java.
In documentation about segmentation, grouping and logical order, i can't found nothing about message flags when using segmentation and grouping.
In other words - what exactly should be structured segmented messages?

I have lots of samples about grouping and segmentation, but:

- when i send grouped messages , they have sequence number - 1,2,3 and groupID - this is exactly as documented.
- when i send segmented message , all segments have sequence number 1 , offset started for 0 for first segment, and groupID - this is exactly as documented - this sample used PutMessageOption - MQPMO_LOGICAL_ORDER
When i send segments without MQPMO_LOGICAL_ORDER and set from application offset and sequence number - sequense are 1,2,3 for example.

My questions are:

Q1. when i send segment which flags, should be set :
MQConstants.MQMF_MSG_IN_GROUP | MQConstants.MQMF_SEGMENT | MQConstants.MQMF_SEGMENTATION_ALLOWED
or
MQConstants.MQMF_SEGMENT | MQConstants.MQMF_SEGMENTATION_ALLOWED
because documentation says , that when i use MQConstants.MQMF_SEGMENT, goupId will be set.

Q2. Is it mandatory received segment to have sequence number different form 1, if i have offset values that is correct - 0, 3956345 for example.

Q3. What should be originalLength of message segment:
each segment should be have original length of payload or length of each segment payload (for example if i send 3 segments with size 3MB each, originalLength of each must be 3145728)
Regrads
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