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Building PHP Daemons and Long Running Processes
28
//setup things
while($run){
//do some things
sleep(1);
}
//shutdown things
Publish
Database
Seed
Queue
Worker
Web App
Check If Ready
Queue Up Work
Delay Job
Publish File
Select Stale URLs
Add as Jobs
Wait A While
Page URL
Keywords
Links
Last Update
Multiple Workers
Reasonable Timeout
Queue
Fetch User Data
Generate Content
Send Email
Create New User
Add ID as Job
For Two Channels
Multiple Channels
Worker(n)
Transcode
Queue
Fetch Page
Extract Keywords
Extract Links
Upsert Data
Check If Done
Convert File
Queue Thumbnail
Queue Keyword
Twitter Streaming API
Publish
Transcode
Thumbnail
Keyword
(lets see some real code)
Thumbnail
Keyword
Check if Done
Extract Frames
Queue Publish
Check if Done
Extract Keywords
Queue Publish
PHP Daemons
and
Long Running
Control
gearman
beanstalkd
rabbitmq
SQS/SNS
Processes
Respond to
signals.
blocking
reservations
streaming
In case you only recognize people by their profile pics.
Process a post,
send an email,
Tim Lytle - @tjlytle
parse a log.
pcntl_signal()
declare()
pcntl_signal_dispatch()
Building stuff PhoneBurner
Retired Contract Developer
Daemons
Why? Time.
(and if it's needed)
3
Processing files. Reports. Migrations. Batch inserts.
Stop
2
How?
Restart.
(or Debian)
upstart
systemd
supervisord
fork
Things that take time.
responsibly.
Things that happen over time.
start on runlevel [2345]
respawn
respawn limit 5 60
setuid vagrant
chdir /vagrant/cli
exec php twitter.php
Don't exit.
1
Queue processing. Real-time data. Workers.
Or that
must be
successful.
And things
like them.
Queues
Alternatives
webhooks • platforms