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| Cogito-Ergo-Sum |
 Posted: Wed Feb 01, 2012 9:08 pm Post subject: MB8 Mapping node : Including, omitting headers. |
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Master
Joined: 07 Feb 2006
Posts: 293
Location: Bengaluru, India
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How do I add or remove headers to or from messages in Mapping node ?
For wonders' sake, I set input message as the response from Google Geocode API and target as a CSV record - via a message set - in the Mapping node. I wired the Out terminal to a message queue. This message queue does get the CSV but, it is prefixed by the HTTP headers too. To remove this, I added the HTTPResponse header in the target pane; but didn't map it from the input message. That eliminated the HTTP headers from the message.
For more wonders' sake, I wanted to publish the CSV to a publication topic. For this I wired the output terminal of Mapping node to a Publication node. The publication wouldn't happen because I hadn't added the MQRFH2 header. So, I added the MQRFH2 header in the target pane and I think, I mapped the Format (or Encoding or CCSID or some such) from the input message. It worked.
So, to eliminate headers, add the header in the target pane of the Mapping node, but do not map it. To add a header, add it in the target pane and map it. BTW, in the first case mentioned above, the HTTP headers weren't seen when I used a FileOutput node instead of message queue.
Am I doing this right ? Or, am I missing something ?
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| lancelotlinc |
| Posted: Thu Feb 02, 2012 6:45 am Post subject: |
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Jedi Knight
Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA
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For what it's worth, in my experience, anything more than a simple one-to-one map needs a compute node. IMHO, the mapping nodes are not yet mature enough to be utilitarian.
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| mqjeff |
| Posted: Thu Feb 02, 2012 7:46 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| lancelotlinc wrote: |
| For what it's worth, in my experience, anything more than a simple one-to-one map needs a compute node. IMHO, the mapping nodes are not yet mature enough to be utilitarian. |
OTOH, I don't think you've played with the v8 mapper. Which is new and shiny. |
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| lancelotlinc |
| Posted: Thu Feb 02, 2012 7:47 am Post subject: |
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Jedi Knight
Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA
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| mqjeff wrote: |
| lancelotlinc wrote: |
| For what it's worth, in my experience, anything more than a simple one-to-one map needs a compute node. IMHO, the mapping nodes are not yet mature enough to be utilitarian. |
OTOH, I don't think you've played with the v8 mapper. Which is new and shiny. |
True, I am excited by the new direction WMB v8 has taken. I hope to get some seat time soon.
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| Vitor |
| Posted: Tue Aug 07, 2012 2:47 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| lancelotlinc wrote: |
| mqjeff wrote: |
| lancelotlinc wrote: |
| For what it's worth, in my experience, anything more than a simple one-to-one map needs a compute node. IMHO, the mapping nodes are not yet mature enough to be utilitarian. |
OTOH, I don't think you've played with the v8 mapper. Which is new and shiny. |
True, I am excited by the new direction WMB v8 has taken. I hope to get some seat time soon. |
Then comment on WMBv8's new features after that, not before. 
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Honesty is the best policy.
Insanity is the best defence. |
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| sovee |
| Posted: Tue Aug 07, 2012 1:26 pm Post subject: |
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Novice
Joined: 23 Jul 2012
Posts: 12
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| fjb_saper |
| Posted: Fri Aug 17, 2012 1:44 am Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY
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| kimbert |
| Posted: Tue Aug 21, 2012 12:11 pm Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| IMHO, the mapping nodes are not yet mature enough to be utilitarian. |
I strongly advise you, and anybody else who has not yet tried out the v8 mapper, to give it a try at the earliest opportunity. |
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| nathanw |
| Posted: Wed Aug 22, 2012 12:45 am Post subject: |
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Knight
Joined: 14 Jul 2004
Posts: 550
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having just spent 6 months using mapping nodes on a project in V7 I have to say my respect (not quite the right word but I cannot think of it at the moment) for the mapping nodes has gone up
I had not used them a great deal and to be honest given the choice I would prefer to use ESQL but I do like certain aspects of the mapping nodes
in response to OP yes that is one way of doing it
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| Vitor |
| Posted: Wed Aug 22, 2012 2:43 am Post subject: |
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Grand High Poobah
Joined: 11 Nov 2005
Posts: 26093
Location: Texas, USA
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| nathanw wrote: |
having just spent 6 months using mapping nodes on a project in V7 I have to say my respect (not quite the right word but I cannot think of it at the moment) for the mapping nodes has gone up
I had not used them a great deal and to be honest given the choice I would prefer to use ESQL but I do like certain aspects of the mapping nodes |
Wait until you see the v8 mapping node. Way cool.
(Never replace ESQL obviously, but way cool)
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| kimbert |
| Posted: Wed Aug 22, 2012 4:06 am Post subject: |
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Jedi Council
Joined: 29 Jul 2003
Posts: 5542
Location: Southampton
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| Quote: |
| (Never replace ESQL obviously, but way cool) |
The new mapping node is capable of things that were impossible or impractical or too slow using the old mapping node. So in v8, the mapping node will be used for tasks where ESQL would have been used in v7.
But that's not the same as 'replacing ESQL', so your point stands. ESQL is here to stay, and remains an excellent choice for many tasks. |
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