FileCache

Simple file caching module, which caches a ruby object in a file.

Usage

Cache api call for 24 hours as json:

instances = FileCache.open do
  ec2 = Aws::EC2::Client.new()
  ec2.describe_instances()
end

Cache data returned from block for 5 minutes as json:

data = FileCache.open(lifetime: 5) do
  # heavy calculation, data retrivial or similar
  # which returns one object, which is going to be cached
end

Cache data returned from block and use Marshal.dump and Marshal.load:

data = FileCache.open(format: :marshal) do
  # heavy calculation, data retrivial or similar
  # which returns one object, which is going to be cached
end

Force refresh of cached data:

data = FileCache.open(force_refresh: true) do
  # heavy calculation, data retrivial or similar
  # which returns one object, which is going to be cached
end

Per default, the cache filename is calculated from $0. If You need multiple cache files, You can use variants to create different cache files:

data = FileCache.open(variants: 'some_variant') do
  # heavy calculation, data retrivial or similar
  # which returns one object, which is going to be cached
end

Force deletion of cache file:

FileCache.clean

Force deletion of cache file in marshal format and with variants:

FileCache.clean(format: :marshal, variants: 'some_variant')

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. 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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/lscheidler/ruby-file_cache.

License

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

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. 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.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/lscheidler/ruby-file_cache.

License

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