cassandra_lock
A ruby lib to achieve consensus with Cassandra, inspired by consensus on cassandra. It can be used as lock in distributed systems.
Installation
Add this line to your application's Gemfile:
gem 'cassandra_lock'
And then execute:
$ bundle
Or install it yourself as:
$ gem install cassandra_lock
Usage
Create the keyspace, see the example bellow.
CREATE KEYSPACE test_lock WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', 'datacenter1' : 1 };
Create the table, see the example bellow.
CREATE TABLE test_lock.leases (
name text PRIMARY KEY,
owner text,
value text
) with default_time_to_live = 5
And finally to use in your code:
#to create
contact_points = ["127.0.0.1"]
keyspace = "test_lock"
client = CassandraLock::Client.new(contact_points, keyspace)
#to lock
if client.lock("my_resource")
puts "I acquired the lock"
else
puts "Someone took the lock"
end
#to unlock
client.unlock("my_resource")
#to keep_alive
client.keep_alive("my_resource")
Contributing
- Fork it ( https://github.com/leandromoreira/cassandra_lock/fork )
- Create your feature branch (
git checkout -b my-new-feature
) - Commit your changes (
git commit -am 'Add some feature'
) - Push to the branch (
git push origin my-new-feature
) - Create a new Pull Request