Class: OpenFeature::SDK::Contrib::Providers::FileProvider

Inherits:
Object
  • Object
show all
Includes:
Common
Defined in:
lib/open_feature/sdk/contrib/providers/file_provider.rb

Overview

Read feature flags from a file.

To use FileProvider, it can be set during the configuration of the SDK

OpenFeature::SDK.configure do |config|
  config.provider = OpenFeature::SDK::Contrib::Providers::FileProvider.new(source: "/path/to/file")
end

Within the FileProvider, the following methods exist

  • fetch_boolean_value - Retrieve feature flag boolean value from the file

  • fetch_string_value - Retrieve feature flag string value from the file

  • fetch_number_value - Retrieve feature flag number value from the file

  • fetch_object_value - Retrieve feature flag object value from the file

Constant Summary collapse

NAME = 
"File Provider"

Instance Attribute Summary

Attributes included from Common

#cache_duration, #custom_parser, #deep_keys, #extra_options, #format, #metadata, #source

Instance Method Summary collapse

Methods included from Common

#expire_cache!, #fetch_boolean_value, #fetch_float_value, #fetch_number_value, #fetch_object_value, #fetch_raw_key, #fetch_string_value, #initialize, #read_all_values_with_cache

Instance Method Details

#read_and_parse_flags ⇒ Object 



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# File 'lib/open_feature/sdk/contrib/providers/file_provider.rb', line 32

def read_and_parse_flags
  file_contents = begin
    ERB.new(File.read(File.expand_path(source))).result
  rescue Errno::ENOENT
    @flag_contents = {}
  end

  return @flag_contents if @flag_contents

  return custom_parser.call(file_contents) if custom_parser

  @flag_contents = if format == :yaml
                     YAML.safe_load(file_contents)
                   else
                     JSON.parse(file_contents)
                   end

  @flag_contents
end