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| goldym |
 Posted: Tue Feb 27, 2007 10:37 am Post subject: CAST Function |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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I have a message coming in the MRM domain:
1. I have to RESET it to BLOB in order to Calculate the length
2. Then CAST it back to MRM in order to store the value in a field A.
3. Then once I get the Length I have to RESET it to Blob again to get the New Length that includes the field A
4. Then CAST back to MRM in order to store the new length in field A
Is it possible to do this using the CAST funtion instead of using 4 RCD nodes? |
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| jefflowrey |
| Posted: Tue Feb 27, 2007 10:54 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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You can't do this with CAST at all.
You need to use ASBITSTREAM and CREATE FIELD... PARSE.
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I am *not* the model of the modern major general. |
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| goldym |
| Posted: Tue Feb 27, 2007 11:15 am Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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I would use ASBITSTREAM and CREATE FIELD... PARSE to Change the domain from MRM to BLOB and the reverse?
[quote="jefflowrey"]You can't do this with CAST at all.
You need to use ASBITSTREAM and CREATE FIELD... PARSE.[/quote] |
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| special_agent_Queue |
| Posted: Tue Feb 27, 2007 12:32 pm Post subject: |
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Centurion
Joined: 27 Jul 2006
Posts: 102
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| Yes, that's what he said... |
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| fjb_saper |
| Posted: Tue Feb 27, 2007 12:58 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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And remember if this is XML in the MRM domain you will have to do at least one more round trip (very costly).
Could you please be a little bit more specific as to what you are trying to achieve and why?
Enjoy 
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MQ & Broker admin |
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| goldym |
| Posted: Tue Feb 27, 2007 1:35 pm Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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fjb_saper - I need to calculate the total length of the TDS record twice because I need the total length including the length field. Do you have any suggestions?
Its not XML its TDS.
[quote="fjb_saper"]And remember if this is XML in the MRM domain you will have to do at least one more round trip (very costly).
Could you please be a little bit more specific as to what you are trying to achieve and why?
Enjoy [/quote] |
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| jefflowrey |
| Posted: Tue Feb 27, 2007 1:39 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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Is the length field a variable length field? Are any of the fields that precede length defined as variable length fields?
Is the stuff that surrounds it (tags, delimiters, etc.) fixed in length?
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| goldym |
| Posted: Tue Feb 27, 2007 1:40 pm Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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The length field and all the other fields are variable length fields not fixed.
[quote="jefflowrey"]Is the length field a variable length field? Are any of the fields that precede length defined as variable length fields?
Is the stuff that surrounds it (tags, delimiters, etc.) fixed in length?[/quote] |
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| jefflowrey |
| Posted: Tue Feb 27, 2007 1:44 pm Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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You need to uncheck the box that says "Disable BBCode in this post".
Is the length field stored as character data, or binary/integer data?
Is the length field tagged on it's own, or just delimited?
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| goldym |
| Posted: Tue Feb 27, 2007 1:52 pm Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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Is the length field stored as character data, or binary/integer data -
The Length field is being stored as Integer data I am using the LENGTH function to calculate
Is the length field tagged on it's own, or just delimited - i believe it is tagged |
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| kimbert |
| Posted: Tue Feb 27, 2007 2:46 pm Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Please - just give us a short example message. It makes everything so much clearer. |
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| goldym |
| Posted: Tue Feb 27, 2007 3:34 pm Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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| kimbert wrote: |
| Please - just give us a short example message. It makes everything so much clearer. |
Sorry here is a small example
1.200:32*1.201:111*1.202:JONES; |
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| kimbert |
| Posted: Wed Feb 28, 2007 1:35 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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Thanks. Which field is the length field?
And how does this example message relate to these steps?
| Quote: |
1. I have to RESET it to BLOB in order to Calculate the length
2. Then CAST it back to MRM in order to store the value in a field A.
3. Then once I get the Length I have to RESET it to Blob again to get the New Length that includes the field A
4. Then CAST back to MRM in order to store the new length in field A |
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| goldym |
| Posted: Wed Feb 28, 2007 6:34 am Post subject: |
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Centurion
Joined: 24 Jun 2005
Posts: 116
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So this is the message that I create I map from an incoming XML to this TDS formatted message (using mapping node). I think my message set by default populates the length with a 0, not sure why. 1.200 is the field identifier (tag).
1.200:0*1.201:111*1.202:JONES;
I have to convert this to a blob to get the length of the message.
1.200:0*1.201:111*1.202:JONES;
Then convert back to MRM to populalte the length field
1.200:30*1.201:111*1.202:JONES;
Then convert back to Blob to re-calculate the length to include the length field. It will not always be 2 bytes or 3 bytes it maybe 2,3, or 4.
Convert back to MRM to re-populate the length field with the total length to include the length field
1.200:31*1.201:111*1.202:JONES;
That is my issue because right now I have 4 RCD nodes and 4 compute nodes and I think it has to be a more efficient way
[quote="kimbert"]Thanks. Which field is the length field?
And how does this example message relate to these steps?
[quote] |
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| jefflowrey |
| Posted: Wed Feb 28, 2007 6:43 am Post subject: |
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Grand Poobah
Joined: 16 Oct 2002
Posts: 19981
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What happens if the length field causes the message to go from 4 bytes long to 5 bytes long?
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