Resource Lock (GSIP 106)

[jodygarnett]

Port of LockProvider from GWC integrated into ResourceStore API.

For more information see http://geoserver.org/display/GEOS/GSIP+106+-+Managed+File+API

[aaime]

Hi Jody, seems like a good start, just mind, the lock provider needs to be configurable, e.g., in a single node scenario you probably want the in memory one, in a multi-node scenario where all nodes are sharing the same data dir you'll need the file system based one, or maybe better a Hazelcast based one.

[jodygarnett]

The lock provider is configurable, see application context xml file.

Only thing I did unusual is make an adapter so that GWC can make use of the GeoServer LockProvider. That way this single/multi-node configuration only has to happen once.

[aaime]

Hi Jody,
If you look at the GWC conf GUI in GeoServer you will see the lock mamager
can be configured via a drop down choice. That's what I mean by
configurable :-)

Cheers
Andrea
Il 17/mar/2014 21:58 "Jody Garnett" notifications@github.com ha scritto:

The lock provider is configurable, see application context xml file.

Only thing I did unusual is make an adapter so that GWC can make use of
the GeoServer LockProvider. That way this single/multi-node configuration
only has to happen once.

Reply to this email directly or view it on GitHubhttps://github.com//pull/538#issuecomment-37869263
.

[jodygarnett]

ooh neat - I will give it a go.

Jody Garnett

On Tue, Mar 18, 2014 at 8:19 AM, Andrea Aime notifications@github.comwrote:

Hi Jody,
If you look at the GWC conf GUI in GeoServer you will see the lock mamager
can be configured via a drop down choice. That's what I mean by
configurable :-)

Cheers
Andrea
Il 17/mar/2014 21:58 "Jody Garnett" notifications@github.com ha scritto:

The lock provider is configurable, see application context xml file.

Only thing I did unusual is make an adapter so that GWC can make use of
the GeoServer LockProvider. That way this single/multi-node configuration
only has to happen once.

Reply to this email directly or view it on GitHub<
https://github.com/geoserver/geoserver/pull/538#issuecomment-37869263>

.

Reply to this email directly or view it on GitHubhttps://github.com//pull/538#issuecomment-37871740
.

[jodygarnett]

Well that was a lot more work then expected. Pull request includes requested UI changes (and docs).

The lockProvider is currently provided "too late" in the game, since global settings need to be read first. I am going to view this as low risk since the content is only being read (not edited).

Note we cannot pull the same trick as logging (logging (which parses the file by hand during servlet init) as the beans are not available until spring is ready.

[aaime]

On Thu, Mar 20, 2014 at 3:53 PM, Jody Garnett notifications@github.comwrote:

Well that was a lot more work then expected. Pull request includes
requested UI changes (and docs).

Sorry about that, Wicket has a steep learning curve. Everybody loves it so
much :-)

The lockProvider is currently provided "too late" in the game, since
global settings need to be read first. I am going to view this as low risk
since the content is only being read (not edited).

Right, hopefully good enough.

Cheers
Andrea

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