mysql - PHP Web Service Queue -


i connecting web service allows max (could 1,5,10 depending on license) concurrent connections same source. need solution can in real time (not asynchronously) queue requests web service, ensuring max request running @ once.

i have current set working:

$jobid = $this->queue->addjob($operation);                while ( !$this->queue->canrunjob($jobid) ) {   //error_log("queue full, waiting");                         usleep(500);                                     } $this->queue->runjob($jobid); ... $this->queue->completejob($jobid);

this uses custom queue class, uses mysql table track jobs, , count number of actively running , pending jobs.

$this->queue->addjob adds new job database, status of "pending"

$this->queue->canrunjob($jobid) checks see how many running jobs there are. if there less max jobs running, grab next pending job list in fifo order.

the php script looping , sleeping until job can run.

once canrunjob calls $this->queue->runjob($jobid) updates job in queue "running" , sends request webservice.

when webservice returns response calls $this->queue->completejob($jobid) updates job in queue "completed".

this works 95% of time, if web service provider bogged down, or down completely, causes process buildup on server locks web , database connections.

looking suggestions of way handle scenario without looping / sleeping

throw glance @ process component of symfony 2. able trigger subprocesses can work, e.g. api connection. parent can make sure n subprocesses fired. pack in loop , query each job status in there.


Comments

Post a Comment

Popular posts from this blog

html - Outlook 2010 Anchor (url/address/link) -

i'm trying link specific pdf page msoutlook'10 or msword'10, #page=... anchor particularly useful , works fine elsewhere. unfortunately when click [ctr-k] in outlook or winword, links re-formatted assuming unc path. pdf file located on shared drive. using "file:" prefix links open pdf in adobe reader (outside of browser), , "http:" open inside browser. issue seem need open in browser "file:" prefix in order anchor work. know anchors work inside browser. outlook uses windows/explorer default program (based on file extension) seems open in adobe reader neglecting anchor. is aware of solution, link specific page or bookmark of shared-pdf ms outlook and/or winword link? common references: mailermailer.com/...anchor-tags-html-emails campaignmonitor.com/...anchor-links-in-email-newsletters/ stackoverflow.com/...anchor-in-pdf-document
Read more

javascript - Why does running this loop 9 times take 100x longer than running it 8 times? -

consider code: test = function() { } t = new test(); (var = 0; < 8; i++) { result = t instanceof test; } if change number of iterations 8 9 , loop take 100 times longer complete in latest version of firefox (41.0.1). tested on 2 different pcs , magic limit 8. here jsperf test used: http://jsperf.com/instanceof-8-times-vs-9-times does have idea why might happen? seems specific instanceof . not happen if else object, example check property. note: filed bugzilla bug this. jan de mooij mozilla team has posted details in bugzilla thread . here's simplistic interpretation of highly technical answers: in i < 8 case, firefox smart enough hoist result = t instanceof test; statement out of loop (according tests, doesn't seem omit altogether). in i < 9 case, apparently doesn't optimization . why? reason not clear, related fact 9 iterations threshold above function considered "hot" enough run through jit compiler. i < 8 cas...
Read more

Getting gateway time-out Rails app with Nginx + Puma running on Digital Ocean -

following this guide setup app on digital ocean droplet, not working. site not loading , it's throwing: "gateway time-out". the puma server works, since ps aux | grep puma prints: root 15878 0.0 0.4 376832 2168 ? sl 12:50 0:00 puma 2.13.4 (unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock) [20150930164940] root 15881 0.0 0.7 903676 3692 ? sl 12:50 0:06 puma: cluster worker 0: 15878 [20150930164940] root 24654 0.0 0.1 11748 916 pts/2 s+ 18:00 0:00 grep --color=auto puma my nginx config: user root; worker_processes 1; events { worker_connections 1024; } http { upstream puma { server unix:///var/www/myapp/shared/tmp/sockets/myapp-puma.sock; } server { listen 80; server_name myapp.com; root /var/www/myapp/current/public; access_log /var/www/myapp/current/log/access.log; error_log /...
Read more