prepare 5.5.0 release (#120)

.circleci/config.yml

@@ -19,7 +19,7 @@ ruby-docker-template: &ruby-docker-template
           gem install jruby-openssl; # required by bundler, no effect on Ruby MRI
         fi
     - run: ruby -v
-    - run: gem install bundler -v "~> 1.7"
+    - run: gem install bundler -v 1.17.3
     - run: bundle install
     - run: mkdir ./rspec
     - run: bundle exec rspec --format progress --format RspecJunitFormatter -o ./rspec/rspec.xml spec
@@ -32,28 +32,38 @@ jobs:
   test-2.2:
     <<: *ruby-docker-template
     docker:
-      - image: circleci/ruby:2.2.9-jessie
+      - image: circleci/ruby:2.2.10-jessie
+      - image: consul
       - image: redis
+      - image: amazon/dynamodb-local
   test-2.3:
     <<: *ruby-docker-template
     docker:
-      - image: circleci/ruby:2.3.6-jessie
+      - image: circleci/ruby:2.3.7-jessie
+      - image: consul
       - image: redis
+      - image: amazon/dynamodb-local
   test-2.4:
     <<: *ruby-docker-template
     docker:
-      - image: circleci/ruby:2.4.4-stretch
+      - image: circleci/ruby:2.4.5-stretch
+      - image: consul
       - image: redis
+      - image: amazon/dynamodb-local
   test-2.5:
     <<: *ruby-docker-template
     docker:
-      - image: circleci/ruby:2.5.1-stretch
+      - image: circleci/ruby:2.5.3-stretch
+      - image: consul
       - image: redis
+      - image: amazon/dynamodb-local
   test-jruby-9.2:
     <<: *ruby-docker-template
     docker:
       - image: circleci/jruby:9-jdk
+      - image: consul
       - image: redis
+      - image: amazon/dynamodb-local
 
   # The following very slow job uses an Ubuntu container to run the Ruby versions that
   # CircleCI doesn't provide Docker images for.
@@ -63,8 +73,11 @@ jobs:
     environment:
       - RUBIES: "jruby-9.1.17.0"
     steps:
+      - run: sudo add-apt-repository "deb [arch=amd64] https://download.docker.com/linux/ubuntu $(lsb_release -cs) stable"
       - run: sudo apt-get -q update
       - run: sudo apt-get -qy install redis-server
+      - run: sudo apt-cache policy docker-ce
+      - run: sudo apt-get -qy install docker-ce      
       - checkout
       - run:
           name: install all Ruby versions
@@ -82,10 +95,24 @@ jobs:
               fi
               # bundler 2.0 may be preinstalled, we need to remove it if so
               yes | gem uninstall bundler --version '>=2.0' || true;
-              gem install bundler -v "~> 1.7";
+              gem install bundler -v 1.17.3;
               bundle install;
               mv Gemfile.lock "Gemfile.lock.$i"
             done
+      - run:
+          name: start DynamoDB
+          command: docker run -p 8000:8000 amazon/dynamodb-local
+          background: true
+      - run:
+          name: download Consul
+          command: wget https://releases.hashicorp.com/consul/0.8.0/consul_0.8.0_linux_amd64.zip
+      - run:
+          name: extract Consul
+          command: unzip consul_0.8.0_linux_amd64.zip
+      - run:
+          name: start Consul
+          command: ./consul agent -dev
+          background: true
       - run:
           name: run tests for all versions
           shell: /bin/bash -leo pipefail

CONTRIBUTING.md

@@ -2,15 +2,3 @@ Contributing to LaunchDarkly SDK for Ruby
 =========================================
 
 We encourage pull-requests and other contributions from the community. We've also published an [SDK contributor's guide](http://docs.launchdarkly.com/docs/sdk-contributors-guide) that provides a detailed explanation of how our SDKs work.
-
-Dependencies
-------------
-[ld-em-eventsource](https://github.com/launchdarkly/em-eventsource)
-
-
-Style
------
-
-Our pull requests have [Hound CI](https://houndci.com/) set up to do style checking.
-We also run [Rubocop](https://github.com/bbatsov/rubocop).
-

Gemfile.lock

@@ -5,20 +5,33 @@ PATH
       concurrent-ruby (~> 1.0)
       faraday (>= 0.9, < 2)
       faraday-http-cache (>= 1.3.0, < 3)
-      http_tools (~> 0.4.5)
       json (>= 1.8, < 3)
+      ld-eventsource (~> 1.0)
       net-http-persistent (>= 2.9, < 4.0)
       semantic (~> 1.6)
-      socketry (~> 0.5.1)
 
 GEM
   remote: https://rubygems.org/
   specs:
+    aws-eventstream (1.0.1)
+    aws-partitions (1.128.0)
+    aws-sdk-core (3.44.2)
+      aws-eventstream (~> 1.0)
+      aws-partitions (~> 1.0)
+      aws-sigv4 (~> 1.0)
+      jmespath (~> 1.0)
+    aws-sdk-dynamodb (1.19.0)
+      aws-sdk-core (~> 3, >= 3.39.0)
+      aws-sigv4 (~> 1.0)
+    aws-sigv4 (1.0.3)
     codeclimate-test-reporter (0.6.0)
       simplecov (>= 0.7.1, < 1.0.0)
     concurrent-ruby (1.1.4)
     connection_pool (2.2.1)
     diff-lcs (1.3)
+    diplomat (2.0.2)
+      faraday (~> 0.9)
+      json
     docile (1.1.5)
     faraday (0.15.4)
       multipart-post (>= 1.2, < 3)
@@ -27,10 +40,14 @@ GEM
     ffi (1.9.25)
     ffi (1.9.25-java)
     hitimes (1.3.0)
-    hitimes (1.3.0-java)
     http_tools (0.4.5)
+    jmespath (1.4.0)
     json (1.8.6)
     json (1.8.6-java)
+    ld-eventsource (1.0.0)
+      concurrent-ruby (~> 1.0)
+      http_tools (~> 0.4.5)
+      socketry (~> 0.5.1)
     listen (3.1.5)
       rb-fsevent (~> 0.9, >= 0.9.4)
       rb-inotify (~> 0.9, >= 0.9.7)
@@ -74,9 +91,11 @@ PLATFORMS
   ruby
 
 DEPENDENCIES
+  aws-sdk-dynamodb (~> 1.18)
   bundler (~> 1.7)
   codeclimate-test-reporter (~> 0)
   connection_pool (>= 2.1.2)
+  diplomat (>= 2.0.2)
   ldclient-rb!
   listen (~> 3.0)
   rake (~> 10.0)

README.md

@@ -15,37 +15,37 @@ This version of the LaunchDarkly SDK has a minimum Ruby version of 2.2.6, or 9.1
 Quick setup
 -----------
 
-0. Install the Ruby SDK with `gem`
+1. Install the Ruby SDK with `gem`
 
-```shell
+    ```shell
 gem install ldclient-rb
 ```
 
-1. Require the LaunchDarkly client:
+2. Require the LaunchDarkly client:
 
-```ruby
+    ```ruby
 require 'ldclient-rb'
 ```
 
-2. Create a new LDClient with your SDK key:
+3. Create a new LDClient with your SDK key:
 
-```ruby
+    ```ruby
 client = LaunchDarkly::LDClient.new("your_sdk_key")
 ```
 
 ### Ruby on Rails
 
-0.  Add `gem 'ldclient-rb'` to your Gemfile and `bundle install`
+1. Add `gem 'ldclient-rb'` to your Gemfile and `bundle install`
 
-1.  Initialize the launchdarkly client in `config/initializers/launchdarkly.rb`:
+2. Initialize the launchdarkly client in `config/initializers/launchdarkly.rb`:
 
-```ruby
+    ```ruby
 Rails.configuration.ld_client = LaunchDarkly::LDClient.new("your_sdk_key")
 ```
 
-2.  You may want to include a function in your ApplicationController
+3.  You may want to include a function in your ApplicationController
 
-```ruby
+    ```ruby
     def launchdarkly_settings
       if current_user.present?
         {
@@ -72,31 +72,44 @@ Rails.configuration.ld_client = LaunchDarkly::LDClient.new("your_sdk_key")
     end
 ```
 
-3.  In your controllers, access the client using
+4. In your controllers, access the client using
 
-```ruby
+    ```ruby
 Rails.application.config.ld_client.variation('your.flag.key', launchdarkly_settings, false)
 ```
 
 Note that this gem will automatically switch to using the Rails logger it is detected.
 
 
+Your first feature flag
+-----------------------
+
+1. Create a new feature flag on your [dashboard](https://app.launchdarkly.com).
+2. In your application code, use the feature's key to check whether the flag is on for each user:
+
+```ruby
+if client.variation("your.flag.key", {key: "user@test.com"}, false)
+  # application code to show the feature
+else
+  # the code to run if the feature is off
+end
+```
+
 HTTPS proxy
-------------
-The Ruby SDK uses Faraday and Socketry to handle its network traffic. Both of these provide built-in support for the use of an  HTTPS proxy. If the HTTPS_PROXY environment variable is present then the SDK will proxy all network requests through the URL provided.
+-----------
+
+The Ruby SDK uses Faraday and Socketry to handle its network traffic. Both of these provide built-in support for the use of an  HTTPS proxy. If the HTTPS_PROXY environment variable is present then the SDK will proxy all network requests through the URL provided. (HTTP_PROXY is not used because all LaunchDarkly services require HTTPS.)
 
 How to set the HTTPS_PROXY environment variable on Mac/Linux systems:
 ```
 export HTTPS_PROXY=https://web-proxy.domain.com:8080
 ```
 
-
 How to set the HTTPS_PROXY environment variable on Windows systems:
 ```
 set HTTPS_PROXY=https://web-proxy.domain.com:8080
 ```
 
-
 If your proxy requires authentication then you can prefix the URN with your login information:
 ```
 export HTTPS_PROXY=http://user:pass@web-proxy.domain.com:8080
@@ -106,29 +119,22 @@ or
 set HTTPS_PROXY=http://user:pass@web-proxy.domain.com:8080
 ```
 
+Database integrations
+---------------------
 
-Your first feature flag
------------------------
-
-1. Create a new feature flag on your [dashboard](https://app.launchdarkly.com)
-2. In your application code, use the feature's key to check whether the flag is on for each user:
-
-```ruby
-if client.variation("your.flag.key", {key: "user@test.com"}, false)
-  # application code to show the feature
-else
-  # the code to run if the feature is off
-end
-```
+Feature flag data can be kept in a persistent store using Redis, DynamoDB, or Consul. These adapters are implemented in the `LaunchDarkly::Integrations::Redis`, `LaunchDarkly::Integrations::DynamoDB`, and `LaunchDarkly::Integrations::Consul` modules; to use them, call the `new_feature_store` method in the module, and put the returned object in the `feature_store` property of your client configuration. See the [API documentation](https://www.rubydoc.info/gems/ldclient-rb/LaunchDarkly/Integrations) and the [SDK reference guide](https://docs.launchdarkly.com/v2.0/docs/using-a-persistent-feature-store) for more information.
 
 Using flag data from a file
 ---------------------------
-For testing purposes, the SDK can be made to read feature flag state from a file or files instead of connecting to LaunchDarkly. See [`file_data_source.rb`](https://github.com/launchdarkly/ruby-client/blob/master/lib/ldclient-rb/file_data_source.rb) for more details.
+
+For testing purposes, the SDK can be made to read feature flag state from a file or files instead of connecting to LaunchDarkly. See `LaunchDarkly::FileDataSource` or the [SDK reference guide](https://docs.launchdarkly.com/v2.0/docs/reading-flags-from-a-file) for more details.
 
 Learn more
 -----------
 
-Check out our [documentation](http://docs.launchdarkly.com) for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [complete reference guide for this SDK](http://docs.launchdarkly.com/docs/ruby-sdk-reference).
+Check out our [documentation](http://docs.launchdarkly.com) for in-depth instructions on configuring and using LaunchDarkly. You can also head straight to the [reference guide for this SDK](http://docs.launchdarkly.com/docs/ruby-sdk-reference).
+
+Generated API documentation is on [RubyDoc.info](https://www.rubydoc.info/gems/ldclient-rb).
 
 Testing
 -------
@@ -138,10 +144,10 @@ We run integration tests for all our SDKs using a centralized test harness. This
 Contributing
 ------------
 
-See [Contributing](https://github.com/launchdarkly/ruby-client/blob/master/CONTRIBUTING.md)
+See [Contributing](https://github.com/launchdarkly/ruby-client/blob/master/CONTRIBUTING.md).
 
 About LaunchDarkly
------------
+------------------
 
 * LaunchDarkly is a continuous delivery platform that provides feature flags as a service and allows developers to iterate quickly and safely. We allow you to easily flag your features and manage them from the LaunchDarkly dashboard.  With LaunchDarkly, you can:
     * Roll out a new feature to a subset of your users (like a group of users who opt-in to a beta tester group), gathering feedback and bug reports from real-world use cases.
@@ -153,9 +159,9 @@ About LaunchDarkly
     * [JavaScript](http://docs.launchdarkly.com/docs/js-sdk-reference "LaunchDarkly JavaScript SDK")
     * [PHP](http://docs.launchdarkly.com/docs/php-sdk-reference "LaunchDarkly PHP SDK")
     * [Python](http://docs.launchdarkly.com/docs/python-sdk-reference "LaunchDarkly Python SDK")
-    * [Python Twisted](http://docs.launchdarkly.com/docs/python-twisted-sdk-reference "LaunchDarkly Python Twisted SDK")
     * [Go](http://docs.launchdarkly.com/docs/go-sdk-reference "LaunchDarkly Go SDK")
     * [Node.JS](http://docs.launchdarkly.com/docs/node-sdk-reference "LaunchDarkly Node SDK")
+    * [Electron](http://docs.launchdarkly.com/docs/electron-sdk-reference "LaunchDarkly Electron SDK")
     * [.NET](http://docs.launchdarkly.com/docs/dotnet-sdk-reference "LaunchDarkly .Net SDK")
     * [Ruby](http://docs.launchdarkly.com/docs/ruby-sdk-reference "LaunchDarkly Ruby SDK")
     * [iOS](http://docs.launchdarkly.com/docs/ios-sdk-reference "LaunchDarkly iOS SDK")

ldclient-rb.gemspec

@@ -13,17 +13,19 @@ Gem::Specification.new do |spec|
   spec.summary       = "LaunchDarkly SDK for Ruby"
   spec.description   = "Official LaunchDarkly SDK for Ruby"
   spec.homepage      = "https://github.com/launchdarkly/ruby-client"
-  spec.license       = "Apache 2.0"
+  spec.license       = "Apache-2.0"
 
   spec.files         = `git ls-files -z`.split("\x0")
   spec.executables   = spec.files.grep(%r{^bin/}) { |f| File.basename(f) }
   spec.test_files    = spec.files.grep(%r{^(test|spec|features)/})
   spec.require_paths = ["lib"]
   spec.extensions    = 'ext/mkrf_conf.rb'
 
+  spec.add_development_dependency "aws-sdk-dynamodb", "~> 1.18"
   spec.add_development_dependency "bundler", "~> 1.7"
   spec.add_development_dependency "rspec", "~> 3.2"
   spec.add_development_dependency "codeclimate-test-reporter", "~> 0"
+  spec.add_development_dependency "diplomat", ">= 2.0.2"
   spec.add_development_dependency "redis", "~> 3.3.5"
   spec.add_development_dependency "connection_pool", ">= 2.1.2"
   spec.add_development_dependency "rake", "~> 10.0"
@@ -37,6 +39,5 @@ Gem::Specification.new do |spec|
   spec.add_runtime_dependency "semantic", "~> 1.6"
   spec.add_runtime_dependency "net-http-persistent", [">= 2.9", "< 4.0"]
   spec.add_runtime_dependency "concurrent-ruby", "~> 1.0"
-  spec.add_runtime_dependency "http_tools", '~> 0.4.5'
-  spec.add_runtime_dependency "socketry", "~> 0.5.1"
+  spec.add_runtime_dependency "ld-eventsource", '~> 1.0'
 end

lib/ldclient-rb.rb

@@ -1,4 +1,12 @@
+
+#
+# Namespace for the LaunchDarkly Ruby SDK.
+#
+module LaunchDarkly
+end
+
 require "ldclient-rb/version"
+require "ldclient-rb/interfaces"
 require "ldclient-rb/util"
 require "ldclient-rb/evaluation"
 require "ldclient-rb/flags_state"
@@ -16,6 +24,6 @@
 require "ldclient-rb/non_blocking_thread_pool"
 require "ldclient-rb/event_summarizer"
 require "ldclient-rb/events"
-require "ldclient-rb/redis_store"
 require "ldclient-rb/requestor"
 require "ldclient-rb/file_data_source"
+require "ldclient-rb/integrations"

lib/ldclient-rb/cache_store.rb

@@ -7,6 +7,7 @@ module LaunchDarkly
   #
   # @see https://github.com/plataformatec/faraday-http-cache
   # @see https://github.com/ruby-concurrency
+  # @private
   #
   class ThreadSafeMemoryStore
     #