Skip to content
master
Go to file
Code

Latest commit

 

Git stats

Files

Permalink
Failed to load latest commit information.
Type
Name
Latest commit message
Commit time
 
 
 
 
 
 
 
 
 
 

README.md

sequel-pg_advisory_locking

sequel-pg_advisory_locking is a Sequel extension that adds support for PostgreSQL's advisory locks.

Usage

This adds two methods to Sequel::Database.

Both methods require an integer key, which is passed directly to PostgreSQL's advisory locking functions.

with_advisory_lock will block and yield when it obtains the lock (pg_advisory_lock). It returns the value of the block.

DB.with_advisory_lock(1) do
    has_exclusive_lock()
end

try_advisory_lock will yield to the block if the lock is immediately available (pg_try_advisory_lock). It returns the value of the block, or nil if it was unable to obtain the lock.

Each method uses exclusive locks by default. They can be told to use shared locks (pg_advisory_lock_shared and pg_try_advisory_lock_shared) by passing a hash with an exclusive key set to false as the second argument:

DB.with_advisory_lock(1, exclusive: false) do
    has_shared_lock()
end

About

Adds support for PostgreSQL's advisory locking to Sequel

Resources

License

Releases

No releases published

Packages

No packages published

Languages

You can’t perform that action at this time.