File & Folder locking

[DeepDiver1975]

Solution Approach

• add columns to filecache table identifying the lock state (lock user or lock client or lock session id, lock timeout)
• operations lock folders and files before performing operations
• access to folders and files which are locked results in exception and http status code 415/Locked
• lock status is exposed via webdav properties
• lock status is visible in the web browser
• web dav clients CANNOT actively loc files/folders

[DeepDiver1975]

@karlitschek as just discussed

[DeepDiver1975]

Alternative approach which might help in searching the file hierarchy is to have an isolated lock table.

@PVince81 we have been talking about this right.

[PVince81]

We already had a ticket: #11804

[PVince81]

An isolated lock table is maybe better, but if we map it by file id we might get in trouble in some situations...

[DeepDiver1975]

An isolated lock table is maybe better, but if we map it by file id we might get in trouble in some situations...

FK time ...

[DeepDiver1975]

let's close this on and continue in #11804

[PVince81]

With trouble I was mostly thinking of unstable file ids: #13310