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MQSeries.net Forum Index » General IBM MQ Support » MQ Pub/Sub - Topic re-routing

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bruce2359
PostPosted: Mon Aug 19, 2019 6:20 am    Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 9394
Location: US: west coast, almost. Otherwise, enroute.

HubertKleinmanns wrote:
I was able to subscribe to "userdata" and put the message to a queue alias, but I was not able, to put it to a topic alias. I got the error
Quote:
AMQ8470E: The object <Name of the alias> is not a valid subscription destination.

Please post the <Name of the alias> definition here for all to see. Please also post the target of the alias.
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HubertKleinmanns
PostPosted: Mon Aug 19, 2019 6:54 am    Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 732
Location: Germany

Hi,

these are the MQSC definitions:

Quote:
DEFINE SUB('PoC') +
TOPICSTR('poc/#') +
PSPROP(RFH2) +
DEST('PoC.QA') +
WSCHEMA(TOPIC) +
REPLACE

DEFINE QALIAS('PoC.QA') +
TARGTYPE(TOPIC) +
TARGET('PoC') +
REPLACE

DEFINE TOPIC('PoC') +
TOPICSTR('pfx/poc/topic') +
REPLACE


And this is the result when I execute the commands:

Quote:
5724-H72 (C) Copyright IBM Corp. 1994, 2018.
Starting MQSC for queue manager QM1.


1 : DEFINE SUB('PoC') +
: TOPICSTR('poc/#') +
: PSPROP(RFH2) +
: DEST('PoC.QA') +
: WSCHEMA(TOPIC) +
: REPLACE
AMQ8470E: The object PoC.QA is not a valid subscription destination.
:
2 : DEFINE QALIAS('PoC.QA') +
: TARGTYPE(TOPIC) +
: TARGET('PoC') +
: REPLACE
AMQ8006I: IBM MQ queue created.
:
3 : DEFINE TOPIC('PoC') +
: TOPICSTR('pfx/poc/topic') +
: REPLACE
AMQ8690I: IBM MQ topic created.
3 MQSC commands read.
No commands have a syntax error.
One valid MQSC command could not be processed.

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HubertKleinmanns
PostPosted: Mon Aug 19, 2019 7:10 am    Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 732
Location: Germany

In Addition:

When I Change the TARGTYPE to QUEUE:

Quote:
DEFINE SUB('PoC') +
TOPICSTR('poc/#') +
PSPROP(RFH2) +
DEST('PoC.QA') +
WSCHEMA(TOPIC) +
REPLACE

DEFINE QALIAS('PoC.QA') +
TARGTYPE(QUEUE) +
TARGET('PoC') +
REPLACE

DEFINE TOPIC('PoC') +
TOPICSTR('pfx/poc/topic2') +
REPLACE


it looks different

Quote:
5724-H72 (C) Copyright IBM Corp. 1994, 2018.
Starting MQSC for queue manager QM1.


1 : DEFINE SUB('PoC') +
: TOPICSTR('poc/#') +
: PSPROP(RFH2) +
: DEST('PoC.QA') +
: WSCHEMA(TOPIC) +
: REPLACE
AMQ8094I: IBM MQ subscription created.
:
2 : DEFINE QALIAS('PoC.QA') +
: TARGTYPE(QUEUE) +
: TARGET('PoC') +
: REPLACE
AMQ8006I: IBM MQ queue created.
:
3 : DEFINE TOPIC('PoC') +
: TOPICSTR('pfx/poc/topic2') +
: REPLACE
AMQ8690I: IBM MQ topic created.
3 MQSC commands read.
No commands have a syntax error.
All valid MQSC commands were processed.

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Hubert
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bruce2359
PostPosted: Mon Aug 19, 2019 7:26 am    Post subject: Reply with quote

Poobah

Joined: 05 Jan 2008
Posts: 9394
Location: US: west coast, almost. Otherwise, enroute.

HubertKleinmanns wrote:

... it looks different

"looks different" is not a technical observation. It's akin to "it doesn't work."
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Lex Orandi, Lex Credendi, Lex Vivendi. As we Worship, So we Believe, So we Live.
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fjb_saper
PostPosted: Tue Aug 20, 2019 5:15 am    Post subject: Reply with quote

Grand High Poobah

Joined: 18 Nov 2003
Posts: 20696
Location: LI,NY

HubertKleinmanns wrote:

I was able to subscribe to "userdata" and put the message to a queue alias, but I was not able, to put it to a topic alias. I got the error
Quote:
AMQ8470E: The object <Name of the alias> is not a valid subscription destination.


Sorry, looks like you will need to have a program that republishes.
If you can determine where the message came from by looking at it on the queue, one subscription queue for all clients may be enough. You will have to consume the message and republish it to the new topic...
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HubertKleinmanns
PostPosted: Wed Aug 21, 2019 12:42 am    Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 732
Location: Germany

bruce2359 wrote:
HubertKleinmanns wrote:

... it looks different

"looks different" is not a technical observation. It's akin to "it doesn't work."


I meant:

- Defining a subscription to a topic alias does not work (error "... is not a valid subscription destination.").

- Defining a subscription to a queue alias does work.


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HubertKleinmanns
PostPosted: Wed Aug 21, 2019 12:49 am    Post subject: Reply with quote

Shaman

Joined: 24 Feb 2004
Posts: 732
Location: Germany

fjb_saper wrote:
... Sorry, looks like you will need to have a program that republishes.
If you can determine where the message came from by looking at it on the queue, one subscription queue for all clients may be enough. You will have to consume the message and republish it to the new topic...


I fear, you are right .

Alternatively I have to convince my employer and the customers, to use a common prefix for all publications.

Thanks all for the help, ideas and arguments.
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