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Posted to users@qpid.apache.org by sreuland <sh...@ereuland.com> on 2011/12/02 18:58:25 UTC
are multiple values for a single key in x-match qpid address string
possible?
Hello, I'm trying to create an x-match binding on a headers exchange(qpid
0.10) and it appears as though only the last value for a key is being taken,
for example here's the address string:
myqueue; {create: always,node: {type: queue, durable:'True',x-declare:
{auto-delete:'False', exchange:my_exch, type:headers},
x-bindings:[{queue:myqueue,exchange:'my_exch',arguments:{'x-match':any,'a':'10','a':'999'}}]}}
when sending messages to 'my_exch', only those with header a=999 get routed
to 'myqueue', it appears as though only the last key value in x-match is
taken, is there any way I can specify multiple values for the same key in a
single address string via x-match syntax?
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Re: are multiple values for a single key in x-match qpid address
string possible?
Posted by Fraser Adams <fr...@blueyonder.co.uk>.
I don't think that you have to go as far as creating another queue.
I'm pretty sure that you can have multiple bindings to the same queue.
I *think* it would look something like this (taken from your earlier
example), but I haven't tried it:
x-bindings:[{queue:myqueue,exchange:'my_exch',key: 'binding1',
arguments:{'x-match':any,'a':'10'}},
{queue:myqueue,exchange:'my_exch',key: 'binding2',
arguments:{'x-match':any,'a':'999'}}]
The above should be the equivalent of a match if a=10 or a=999, which is
I think what you want.
The key: 'binding1' and key: 'binding2' bits I added aren't strictly
necessary but if you don't have them then it's impossible to remove the
bindings (using say qpid-config) without also removing the queue.
Frase
sreuland wrote:
> I see, so I have to create another queue such as 'myqueue2' with the binding
> for a=10. Thanks for quik reply!
>
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Re: are multiple values for a single key in x-match qpid address
string possible?
Posted by sreuland <sh...@ereuland.com>.
I see, so I have to create another queue such as 'myqueue2' with the binding
for a=10. Thanks for quik reply!
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Re: are multiple values for a single key in x-match qpid address
string possible?
Posted by Gordon Sim <gs...@redhat.com>.
On 12/02/2011 05:58 PM, sreuland wrote:
> Hello, I'm trying to create an x-match binding on a headers exchange(qpid
> 0.10) and it appears as though only the last value for a key is being taken,
> for example here's the address string:
>
> myqueue; {create: always,node: {type: queue, durable:'True',x-declare:
> {auto-delete:'False', exchange:my_exch, type:headers},
> x-bindings:[{queue:myqueue,exchange:'my_exch',arguments:{'x-match':any,'a':'10','a':'999'}}]}}
>
> when sending messages to 'my_exch', only those with header a=999 get routed
> to 'myqueue', it appears as though only the last key value in x-match is
> taken, is there any way I can specify multiple values for the same key in a
> single address string via x-match syntax?
Maps can only have one value per key. Even if the address allowed
multiple values with the same key, the AMQP protocol wouldn't allow that
to be sent across the wire. So unfortunately you cannot have multiple
values for the same header in a single binding.
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