Implementing Runtime.addShutdownHook is not too complicated (some explanations
here https://www.geeksforgeeks.org/jvm-shutdown-hook-java/). It is not an
absolute guarantee as it depends how exactly the process is shutdown.
Question is : what can we do during this hook (must not be too long as the
system may shut the process down anyway after a timeout).
I can see some options like
- save modifications (layers having a datasource but unsaved modification)
- save unsaved layers (layers without datasource)
- save project
Some could be checked by default.
Any thought ?
---
** [bugs:#322] OJ stops without warnings on system shutdown**
**Status:** open
**Milestone:**
**Created:** Fri May 24, 2013 08:44 PM UTC by Jukka Rahkonen
**Last Updated:** Fri May 24, 2013 08:44 PM UTC
**Owner:** nobody
Tested with version 1.6.1 release on Windows.
If there are layers with unsaved edits in OpenJUMP and user ask computer to
shut down, OpenJUMP is closed without any warnings and unsaved edits are lost.
For comparison, Kosmo GIS 3.0 is keeping the computer in such a state that
operating system sends a message that Kosmo prevents the shutdown and asks if
user wants to cancel or do a forced shutdown.
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