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https://github.com/resultadosdigitais/upperkut

Background processing framework for Ruby applications.
https://github.com/resultadosdigitais/upperkut

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Background processing framework for Ruby applications.

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# Upperkut

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[[Docs]](https://www.rubydoc.info/gems/upperkut/0.7.2/Upperkut)

Background processing framework for Ruby applications.

## Installation

Add this line to your application's Gemfile:

```ruby
gem 'upperkut'
```

And then execute:

$ bundle

Or install it yourself as:

$ gem install upperkut

## Usage

### Example 1 - Buffered Queue:

1) Create a Worker class and the define how to process the batch;
```ruby
class MyWorker
include Upperkut::Worker

def perform(batch_items)
heavy_processing(batch_items)
process_metrics(batch_items)
end
end
```

2) Start pushing items;
```ruby
MyWorker.push_items(
[
{
'id' => SecureRandom.uuid,
'name' => 'Robert C Hall',
'action' => 'EMAIL_OPENNED'
}
]
)
```

3) Start Upperkut;
```bash
$ bundle exec upperkut --worker MyWorker --concurrency 10
```

### Example 2 - Scheduled Queue:

1) Create a Worker class and the define how to process the batch;
```ruby
require 'upperkut/strategies/scheduled_queue'
class MyWorker
include Upperkut::Worker

setup_upperkut do |config|
config.strategy = Upperkut::Strategies::ScheduledQueue.new(self)
end

def perform(batch_items)
heavy_processing(batch_items)
process_metrics(batch_items)
end
end
```

2) Start pushing items with `timestamp` parameter;
```ruby
# timestamp is 'Thu, 10 May 2019 23:43:58 GMT'
MyWorker.push_items(
[
{
'timestamp' => '1557531838',
'id' => SecureRandom.uuid,
'name' => 'Robert C Hall',
'action' => 'SEND_NOTIFICATION'
}
]
)
```

3) Start Upperkut;
```bash
$ bundle exec upperkut --worker MyWorker --concurrency 10
```

### Example 3 - Priority Queue:

Note: priority queues requires redis 5.0.0+ as it uses ZPOP* commands.

1) Create a Worker class and the define how to process the batch;
```ruby
require 'upperkut/strategies/priority_queue'

class MyWorker
include Upperkut::Worker

setup_upperkut do |config|
config.strategy = Upperkut::Strategies::PriorityQueue.new(
self,
priority_key: -> { |item| item['tenant_id'] }
)
end

def perform(items)
items.each do |item|
puts "event dispatched: #{item.inspect}"
end
end
end
```

2) So you can enqueue items from different tenants;
```ruby
MyWorker.push_items(
[
{ 'tenant_id' => 1, 'id' => 1 },
{ 'tenant_id' => 1, 'id' => 2 },
{ 'tenant_id' => 1, 'id' => 3 },
{ 'tenant_id' => 2, 'id' => 4 },
{ 'tenant_id' => 3, 'id' => 5 },
]
)
```

The code above will enqueue items as follows `1, 4, 5, 2, 3`

3) Start Upperkut;
```bash
$ bundle exec upperkut --worker MyWorker --concurrency 10
```

## Development

After checking out the repo, run `bundle install` to install dependencies. Then, run `bundle exec rspec` to run the tests.

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](https://rubygems.org).

## Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/ResultadosDigitais/upperkut. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct.

## License

The gem is available as open source under the terms of the [MIT License](https://opensource.org/licenses/MIT).

## Code of Conduct

Everyone interacting in the Upperkut project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the [code of conduct](https://github.com/ResultadosDigitais/upperkut/blob/master/CODE_OF_CONDUCT.md).