This is a gem for newsfeed module on rails. It uses Cassandra >= 2.x to store data and control your feeds system.

Requirement

• Cassandra >= 2.x
• Rails 4
• Ruby 2

After cassandra installed, it is recommend to increase batch_size_fail_threshold_in_kb in your cassandra.yaml and restart cassandra. Depends on your size of relation between models.

Gem

Add this line to your application's Gemfile:

gem 'rails_newsfeed'

And then execute:

  $ bundle

Or install it yourself as:

  $ gem install rails_newsfeed

First, let this gem generate the cassandra config file. Run rails generation

$ rails g rails_newsfeed:config

and change the configuration follows your system. Then let create the schema by generator

$ rails g rails_newsfeed:init

And create a model by

$ rails g rails_newsfeed:model user_feed --type_of_id=bigint

Change the type_of_id option to match the type of your model

Save the activity first

activity = RailsNewsfeed::Activity.new(content: 'user 1 upload photo 1')
activity.save

Add a feed

user_feed = UserFeed.new(id: 1)
user_feed.insert(activity)

Get feeds

user_feed = UserFeed.new(id: 1)
feeds = user_feed.feeds
next_page_token = user_feed.next_page_token

Delete a feed

activity = RailsNewsfeed::Activity.find(feed_id)
activity.delete

Register to another feed model

user_a_feed = UserFeed.new(id: 1)
user_b_feed = UserFeed.new(id: 2)
user_a_feed.register(user_a_feed)

After checking out the repo, run bin/setup to install dependencies. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Before running test you must apply these cqls into cassandra.

CREATE KEYSPACE rails_newsfeed_test WITH REPLICATION = { 'class': 'SimpleStrategy', 'replication_factor': 3 };
USE rails_newsfeed_test;
CREATE TABLE activity (id uuid, content text, time timestamp, object text, PRIMARY KEY (id));
CREATE TABLE activity_index (id uuid, content text, time timestamp, object text, PRIMARY KEY ((object), id));
CREATE TABLE feed_table (table_class text, PRIMARY KEY (table_class));
CREATE TABLE relation (id uuid, from_class text, from_id text, to_class text, to_id text, PRIMARY KEY ((from_class, from_id), id));
CREATE TABLE relation_index(id uuid, from_class text, from_id text, to_class text, to_id text, PRIMARY KEY ((from_class, from_id, to_class, to_id)));
CREATE TABLE user_feed (id bigint, activity_id uuid, activity_content text, activity_object text, activity_time timestamp, PRIMARY KEY ((id), activity_id));
INSERT INTO feed_table (table_class) VALUES ('UserFeed');

We use rspec to test this gem.

Bug reports and pull requests are welcome on GitHub at https://github.com/adamnguyenit/rails_newsfeed. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.

The gem is available as open source under the terms of the MIT License.