Hot-deployable services are those which can be added to or removed from the running server. These are placed in the JBOSS_DIST/jboss-as/server/<instance-name>/deploy directory. Let’s have a look at a practical example of hot-deployment of services in JBoss before we go on to look at server configuration issues in more detail.

Start JBoss if it isn’t already running and take a look at the server/production/deploy directory. Remove the mail-service.xml file and watch the output from the server:

13:10:05,235 INFO  [MailService] Mail service 'java:/Mail' removed from JNDI

Then replace the file and watch JBoss re-install the service:

13:58:54,331 INFO  [MailService] Mail Service bound to java:/Mail

This is hot-deployment in action.