custom caching from within an extension

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Author	Message
Matthew Carroll	Thursday 11 March 2010 10:28:26 am I'm building an ez extension which uses some template operators to look up info on an external website. I don't have control over that site or direct access to the database, so it uses curl to scrape the info and xpaths to analyse. There are three curl page fetches each time my extension's php is hit, one of which changes every time, the second and third of which change much less often, so could be cached. Is there any way to use ez's caching mechanisms from within my extension to cache the result from that second lookup somehow? Any pointers to appropriate documentation or similar example to work from would be really appreciated. Thanks Matthew http://carroll.org.uk
Gaetano Giunta	Thursday 11 March 2010 1:04:43 pm - create a template fetch function that does the ws calls - put cache blocks around those calls in the template Principal Consultant International Business Member of the Community Project Board
Matthew Carroll	Thursday 11 March 2010 2:09:52 pm Thanks! That was the nudge I needed to see the problem from a new angle. Currently it does all three external fetches within the one operator function, but if I extract some of the logic out to the ez template instead, and put the second and third lookups in a separate function, it will be more efficient overall. I was trying to imagine taking the caching into the php of the extension, when what I need to do is bring a small portion of the extension logic out to the ez template. I just wasn't thinking about the problem the right way (isn't that always the challenge!) http://carroll.org.uk
Matthew Carroll	Thursday 11 March 2010 7:48:41 pm Unfortunately the approach I thought would work doesn't seem to. I took out the second two external website lookups and put them into a template fetch function, but I need to be able to access the result of that fetch as a variable later on. If I do this: {cache-block expiry=86400} {def $mylist=fetch( 'mplookup', 'list', hash())} {/cache-block} ...it doesn't work the second time, as the variable $mylist doesn't exist once that block is cached. Does that make sense? I want to cache the result of the fetch, but still be able to access the variable next time that template is used (with a different view parameter). Am I missing something obvious here? Thanks Matthew http://carroll.org.uk
Gaetano Giunta	Friday 12 March 2010 12:29:13 am No, it is the way cache-blocks work: the actual html is stored in the file on disk, no template-level variable. Workarounds: - move the display of the results within the cache-block (nb: cache-blocks can be nested) - let the cache-block save data into a js variable and use it later down the page for display Principal Consultant International Business Member of the Community Project Board

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eZ debug

Timing:	Jan 18 2025 11:43:36
Script start
Timing:	Jan 18 2025 11:43:36
Module start 'layout'
Timing:	Jan 18 2025 11:43:36
Module start 'content'
Timing:	Jan 18 2025 11:43:36
Module end 'content'
Timing:	Jan 18 2025 11:43:36
Script end

Main resources:

Total runtime	0.0151 sec
Peak memory usage	4,096.0000 KB
Database Queries	3

Timing points:

Checkpoint	Start (sec)	Duration (sec)	Memory at start (KB)	Memory used (KB)
Script start	0.0000	0.0052	588.0313	152.6406
Module start 'layout'	0.0052	0.0027	740.6719	39.4766
Module start 'content'	0.0080	0.0051	780.1484	93.5547
Module end 'content'	0.0130	0.0020	873.7031	38.3047
Script end	0.0150		912.0078

Time accumulators:

Accumulator	Duration (sec)	Duration (%)	Count	Average (sec)
Ini load
Load cache	0.0025	16.5093	14	0.0002
Check MTime	0.0011	7.1032	14	0.0001
Mysql Total
Database connection	0.0010	6.8723	1	0.0010
Mysqli_queries	0.0022	14.4089	3	0.0007
Looping result	0.0000	0.0870	1	0.0000
Template Total	0.0016	10.6	1	0.0016
Template load	0.0008	5.1941	1	0.0008
Template processing	0.0008	5.3333	1	0.0008
Override
Cache load	0.0005	3.5302	1	0.0005
General
dbfile	0.0004	2.5670	8	0.0000
String conversion	0.0000	0.0554	4	0.0000
Note: percentages do not add up to 100% because some accumulators overlap

Templates used to render the page:

Usage	Requested template	Template	Template loaded	Edit	Override
1	print_pagelayout.tpl	<No override>	extension/community/design/community/templates/print_pagelayout.tpl
Number of times templates used: 1 Number of unique templates used: 1

Time used to render debug report: 0.0001 secs