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| How to retrieve names of objects in a queue manager |
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| Cyberherbalist |
 Posted: Mon Jul 01, 2013 9:26 am Post subject: How to retrieve names of objects in a queue manager |
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Newbie
Joined: 01 Jul 2013
Posts: 3
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I am running Websphere MQ 7.5 in a Windows environment, and using the C# language. It seems to me that it should be possible to programmatically obtain a list of queues, channels, or process definitions in a given queue manager. However the API doesn't seem to have a provision for this.
I am thinking of something like:
| Code: |
MQQueueManager mgr = new MQQueueManager("PQM");
string[] queuenames = mgr.GetQueueNames(); |
Of course, no such method exists. Is there some back-door (or even front-door) way to get the information I am looking for? |
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| mqjeff |
| Posted: Mon Jul 01, 2013 10:42 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| gbaddeley |
| Posted: Mon Jul 01, 2013 3:40 pm Post subject: |
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Jedi
Joined: 25 Mar 2003
Posts: 2495
Location: Melbourne, Australia
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Are you an application programmer or a MQ administrator?
App programs should not have any requirement to enumerate queue names, channel names etc. This is a privileged operation in MQ and the programming is fairly complex. The queue names that an app program needs to use should be parameterized to the program.
If you are an MQ admin, there's a wealth of programs out there that can do this for you such as MQ Explorer or the venerable runmqsc, and also allow you to do lots of other useful things. 
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Glenn |
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| Cyberherbalist |
| Posted: Tue Jul 02, 2013 9:42 am Post subject: |
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Newbie
Joined: 01 Jul 2013
Posts: 3
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| gbaddeley wrote: |
| Are you an application programmer or a MQ administrator? |
Both, although recently they finally consolidated all our MQ servers into one admin group, and now I only have to worry about programming. I still maintain my admin privileges -- and they still expect me to chime in when necessary.
| gbaddeley wrote: |
App programs should not have any requirement to enumerate queue names, channel names etc. This is a privileged operation in MQ and the programming is fairly complex. The queue names that an app program needs to use should be parameterized to the program.
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Or obtained from the TMC in the case of triggering, yes, I know.
| gbaddeley wrote: |
If you are an MQ admin, there's a wealth of programs out there that can do this for you such as MQ Explorer or the venerable runmqsc, and also allow you to do lots of other useful things. |
But why do you feel obligated to limit me like this? What if I want to write my very own admin tool? What if I want to start my own software development company and specialize in developing and providing tools for MQ Admins, and so on?
Please somebody point me to a resource that tells me how to use PCF with .NET C# !! Prefereably a resource that deals with at least MQ v7. Please don't tell me it's none of my business. |
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| mqjeff |
| Posted: Tue Jul 02, 2013 11:42 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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| Cyberherbalist wrote: |
| Please somebody point me to a resource that tells me how to use PCF with .NET C# !! Prefereably a resource that deals with at least MQ v7. Please don't tell me it's none of my business. |
I don't think the .NET classes provide an abstraction/object model of PCF messages, so I think you simply have to write MQ code to build PCF messages in C#.
That is, you construct an MQMessage object and use the various MQC Constants to write the necessary fields into the message until you've constructed a PCF message. You can look at the various PCF samples, including the C sample, to see what fields to build and in what order.
Then you can consult the link I posted to the Inquire Q Names command, in the MQ 75 info center, to understand the message you need to construct. |
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| gbaddeley |
| Posted: Tue Jul 02, 2013 3:39 pm Post subject: |
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Jedi
Joined: 25 Mar 2003
Posts: 2495
Location: Melbourne, Australia
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| Quote: |
| But why do you feel obligated to limit me like this? What if I want to write my very own admin tool? What if I want to start my own software development company and specialize in developing and providing tools for MQ Admins, and so on? |
You are quite welcome to do that, and I wish you the best success. I was just giving a heads up to a new poster on mqseries.net that you are venturing into deep water, and your requirement might have been satisfied by existing tools or well established MQ design techniques.
| Quote: |
| Please somebody point me to a resource that tells me how to use PCF with .NET C# !! Prefereably a resource that deals with at least MQ v7. |
Sorry, I haven't used PCF in .NET C#, and I don't know if PCF message classes are available for .NET C#. You could always roll your own, it is not too difficult if you like technical challenges!
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Glenn |
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| shashikanth_in |
| Posted: Wed Jul 03, 2013 3:16 am Post subject: PCF classes in MQ .NET |
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Centurion
Joined: 26 Feb 2009
Posts: 123
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There is certain level of PCF support in MQ .NET classes. There is IBM.WMQ.PCF namespace that can be used to run PCF commands but it is undocumented and have not been updated since MQ v7. So some attributes/data types may not work.
You can refer to PCF classes documentation in MQ Java for help.
Here is snippet for inquiring local queue names in a queue manager:
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public void InquireQueues()
{
try
{
PCFMessageAgent messageAgent = new PCFMessageAgent("QM");
PCFMessage pcfMsg = new PCFMessage(MQC.MQCMD_INQUIRE_Q);
pcfMsg.AddParameter(MQC.MQCA_Q_NAME, "*");
pcfMsg.AddParameter(MQC.MQIA_Q_TYPE, MQC.MQQT_LOCAL ) ;
PCFMessage[] pcfResponse = messageAgent.Send(pcfMsg);
int pcfResponseLen = pcfResponse.Length;
for (int pcfResponseIdx = 0; pcfResponseIdx < pcfResponseLen; pcfResponseIdx++)
{
PCFParameter[] parameters = pcfResponse[pcfResponseIdx].GetParameters();
foreach (PCFParameter pm in parameters)
{
Console.WriteLine(pm.Parameter + " - " + pm.GetValue());
}
}
messageAgent.Disconnect();
}
catch (MQException ex)
{
Console.Write(ex);
}
} |
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