[GROOVY-9922] Add DGM `getPid`

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 4.0.0-alpha-3
• Assignee: Daniel Sun
• Reporter: Daniel Sun
• Created: 31/Jan/21 04:01
• Updated: 02/May/21 09:18
• Resolved: 03/Feb/21 22:55

Description

Sometime we need to know what process id of our running java program, e.g.
① shutdown java program via a shell script, e.g. kill -15 <pid>
② attach the current JVM to transform loaded classes on the fly, e.g. VirtualMachine.attach("<pid>");

Runtime.getRuntime().getPid() can help us to achieve the goal.