gf-core.git/src/server/Cache.hs, branch master

Eliminate the dependency on time-compat

2019-05-15T10:05:38+00:00

It was only needed for compatibility with directory<1.2, but directory>=1.2 has been shipped with ghc since ghc-7.6. Note: time-compat-1.9.* (the current version) is a completely different package, that does not provide the needed function toUTCTime, which was provided in time-compat-0.1.*.

gf -server: include grammar modification time in the info returned by /version

2015-04-17T13:21:20+00:00

PGF service: expire PGFs from the cache when they have been unused for 24 hours

2014-07-21T15:53:38+00:00

...to keep memory use down on the server.

gf -server: include list of loaded PGFs in version info

2014-05-12T13:45:36+00:00

PGF web service: disable caching of parse results

2014-04-10T15:55:33+00:00

Caching parse results uses a lot of memory, even if they expire after 2 minutes, so it won't scale up to many simultaneous users. But some excessive memory use seems to be caused by space leaks in (the Haskell binding to) the C run-time system, and these should be fixed. For example, flushing the PGF cache does not release the memory allocated by the C run-time system when loading a PGF file.

PGF web service: add unlexers and enable client side caching

2014-04-09T17:51:25+00:00

Most PGF web API commands that produce linearizations now accept an unlexer parameter. Possible values are "text", "code" and "mixed". The web service now include Date and Last-Modified headers in the HTTP, responses. This means that browsers can treat responses as static content and cache them, so it becomes less critical to cache parse results in the server. Also did some cleanup in PGFService.hs, e.g. removed a couple of functions that can now be imported from PGF.Lexing instead.

gf -server: add a command to manually flush the PGF cache

2014-03-19T16:15:05+00:00

This can be used if the cloud service seems slow, but it would probably be better to automatically expire unused PGFs from the cache after some time.

ghc-7.6: allow directory-1.2

2013-03-09T21:38:43+00:00

Get rid of old-time depend (and ClockTime in favour of UTCTime). time-compat helps to retain backward compatibility with directory-1.1 and lower.

fastcgi: better grammar cache implementation: don't deadlock on exceptions

2008-10-20T08:24:01+00:00

(fastcgi) replace DataRef with a more general Cache type, which can hold several PGF grammars.

2008-10-17T14:12:53+00:00