how can i insert my java class into JIRA as plugin or compenent?

[Onder Yesil]

I would like to write a java code that retrieves issue message from msmq and perform edit action on jira issue. How can i do that without using of REST or Rest Client. I want

[Nic Brough -Adaptavist-]

You can't do this to an OnDemand installation. Your only option is REST there.

If you want to do it to a Jira you have full control over, then you probably want to write a service in Jira that can pull from whatever msmq might be, parse the data available and update an issue. You can wrap services up as Jira plugins, have a look at https://developer.atlassian.com/display/JIRADEV/JIRA+Plugin+Guide and then https://confluence.atlassian.com/display/JIRA/Services