MetaCPAN::Client does not cache results with WWW::Mechanize::Cached

[melezhik]

Hi! Not sure if this should address to MetaCPAN::Client directly , but it seems caching does not happen from time to time. Sometimes it works fine and sometimes client try to download stuff from internet over and over again.

My set up:

            my $meta_client = MetaCPAN::Client->new(
              ua => HTTP::Tiny::Mech->new(
                mechua => WWW::Mechanize::Cached->new(
                  cache => CHI->new(
                    driver   => 'File',
                    root_dir => "$ENV{HOME}/.swatman/metacpan/cache/",
                  ),
                ),
              ),
            );

[melezhik]

I am afraid I hurry to open this one. This is not a bug, at least I probably know now what happening ...

[oalders]

@melezhik would you mind sharing what the problem was? Might be helpful to someone else.

[melezhik]

First I tried to run mojo application, where fetch some information from metacpan using metacpan client in cache flavor so not re upload data from internet every time, see a code snippet above.

I am not sure but sometimes caching works fine - like files representing cache exists and because of cache an application web page is loaded quite fast, but sometimes it was not, first I blamed it to meta cpan client try to re-upload data from internet, ( ignoring a cache or WWW::Mechanize::Cached ignoring a cache or finally CHI working bad ... ) and so slow downing the output , but then I noticed that it is probably impact from other piece of application like slow css resources returned from external hosts etc.

I am still have not identified a real root of the issue, probably I needed to add some debug on metacpan-client / WWW::Mechanize::Cache context ( this would imply hacking into modules code then ), but I just decided to use metacpan-client without caching and then bring caching afterwords using low level CHI approach ...

So to make a long story short it was not probably metacpan-client/cache issue but just a slow response from other applications parts. But because I did not make a precise tests , I say it was not PROBABLY meat-cpan client/cache fault. I wonder if either metacpan-client or WWW::Mechanize::Cache or CHI allow to trace when/if caching is really done so to debug such an issues in a simple way?

[oalders]

Thanks for the clarification. You could try using LWP::ConsoleLogger::Easy if you need to debug the UserAgent. Not sure how that will behave with caching enabled, but you can get some useful information out of it.