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MQSeries.net Forum Index » IBM MQ Java / JMS » File to Queue Question

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shediiwork
PostPosted: Thu Jun 09, 2005 9:57 am    Post subject: File to Queue Question Reply with quote

Acolyte

Joined: 07 Jun 2005
Posts: 52
Has anyone wrote a stand alone java application that map from files to queues and vice versa as an adapter to the WBIMB?

Shed.
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jefflowrey
PostPosted: Thu Jun 09, 2005 10:00 am    Post subject: Reply with quote

Grand Poobah

Joined: 16 Oct 2002
Posts: 19981
Yes.

It's a royal pain.

You're better off buying one.

EDIT:

Let me expound a little bit.

The painful part of the process is the infrastructure, not the basics of the code.

Such a tool needs to deal with file systems in a relatively transactional manner - and most file systems are not inherently transactional. Some file systems (Windows for example) will also make a file available for reading before the creator has finished writing it. So you have to jump through some hoops to make sure you don't delete an incomplete file or pass an incomplete file. And make sure that the files you are writing out are not grabbed too soon.

Such a tool usually needs a configuration that is available to at least a certain class of business user/operator, if not to "end-users". This may end up requiring a database and a set of webscreens to maintain that database. And then, if you've got a database, you may need two-phase commit with your MQ!

Such a tool certainly needs monitoring - both to ensure that it is running, and for the inevitable case when the user puts a file with the wrong permissions in the input directory.
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I am *not* the model of the modern major general.
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zpat
PostPosted: Thu Jun 09, 2005 10:25 am    Post subject: Reply with quote

Jedi Council

Joined: 19 May 2001
Posts: 5866
Location: UK
There is a sample Java based custom input node for WMQI that listens for file arrival in a directory and then provides the messages to a flow.

The Redbook is SG24-6509 - see the web materials download for that book on the redbooks site www.redbooks.ibm.com for the source code.
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