The Publish Exit sample program

AMQSPSE0 is a sample C program of an exit to intercept a publication before it is delivered to a subscriber. The exit can then, for example, alter the message headers, payload or destination, or prevent the message being published to a subscriber.

To run the sample, perform the following tasks:

Configure the queue manager:
- On UNIX and Linux® systems add a stanza like this to the qm.ini file:
```
PublishSubscribe:                                         
           PublishExitPath=<Module>
           PublishExitFunction=EntryPoint
```
  where the module is MQ_INSTALLATION_PATH/samp/bin/amqspse . MQ_INSTALLATION_PATH represents the high-level directory in which WebSphere MQ is installed. On Windows set the equivalent attributes in the registry.
Make sure the Module is accessible to WebSphere® MQ.
Restart the Queue Manager to pick up the configuration.
In the application process to be traced, describe where the trace files should be written to. For example:
- On UNIX and Linux systems, ensure that the directory/var/mqm/trace exists and export the following environment variable:
```
export MQPSE_TRACE_LOGFILE=/var/mqm/trace/PubTrace
```
- On Windows, ensure that the directory C:\temp exists and set the following environment variable:
```
set MQPSE_TRACE_LOGFILE=C:\temp\PubTrace
```