Identifying Irony in Text

Read the following excerpt from a novel:

"The meeting was scheduled for 9 AM, and while David had half-heartedly agreed to wake up early to prepare, he ended up hitting the snooze button three times before rolling out of bed at 8:45. When he finally rushed into the conference room, he dramatically declared, 'I love making punctuality a priority!' as he scattered papers everywhere trying to find his notes."

What technique is primarily demonstrated in this excerpt?