Class: LaunchDarkly::Impl::Integrations::Redis::RedisFeatureStoreCore Private

Inherits:
RedisStoreImplBase
  • Object
show all
Defined in:
lib/ldclient-rb/impl/integrations/redis_impl.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Internal implementation of the Redis feature store, intended to be used with CachingStoreWrapper.

Since:

  • 5.5.0

Instance Method Summary collapse

Methods inherited from RedisStoreImplBase

#stop

Constructor Details

#initialize(opts) ⇒ RedisFeatureStoreCore

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns a new instance of RedisFeatureStoreCore.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 164

def initialize(opts)
  super(opts)

  @test_hook = opts[:test_hook]  # used for unit tests, deliberately undocumented
end

Instance Method Details

#available? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean)

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 170

def available?
  # We don't care what the status is, only that we can connect
  initialized_internal?
  true
rescue
  false
end

#description ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 178

def description
  "RedisFeatureStore"
end

#get_all_internal(kind) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 205

def get_all_internal(kind)
  fs = {}
  with_connection do |redis|
    hashfs = redis.hgetall(items_key(kind))
    hashfs.each do |k, json_item|
      fs[k.to_sym] = Model.deserialize(kind, json_item)
    end
  end
  fs
end

#get_internal(kind, key) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 199

def get_internal(kind, key)
  with_connection do |redis|
    get_redis(redis, kind, key)
  end
end

#init_internal(all_data) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 182

def init_internal(all_data)
  count = 0
  with_connection do |redis|
    redis.multi do |multi|
      all_data.each do |kind, items|
        multi.del(items_key(kind))
        count = count + items.count
        items.each do |key, item|
          multi.hset(items_key(kind), key, Model.serialize(kind,item))
        end
      end
      multi.set(inited_key, inited_key)
    end
  end
  @logger.info { "RedisFeatureStore: initialized with #{count} items" }
end

#initialized_internal? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean)

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 248

def initialized_internal?
  with_connection { |redis| redis.exists?(inited_key) }
end

#upsert_internal(kind, new_item) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Since:

  • 5.5.0



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# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 216

def upsert_internal(kind, new_item)
  base_key = items_key(kind)
  key = new_item[:key]
  try_again = true
  final_item = new_item
  while try_again
    try_again = false
    with_connection do |redis|
      redis.watch(base_key) do
        old_item = get_redis(redis, kind, key)
        before_update_transaction(base_key, key)
        if old_item.nil? || old_item[:version] < new_item[:version]
          result = redis.multi do |multi|
            multi.hset(base_key, key, Model.serialize(kind, new_item))
          end
          if result.nil?
            @logger.debug { "RedisFeatureStore: concurrent modification detected, retrying" }
            try_again = true
          end
        else
          final_item = old_item
          action = new_item[:deleted] ? "delete" : "update"
          # rubocop:disable Layout/LineLength
          @logger.warn { "RedisFeatureStore: attempted to #{action} #{key} version: #{old_item[:version]} in '#{kind[:namespace]}' with a version that is the same or older: #{new_item[:version]}" }
        end
        redis.unwatch
      end
    end
  end
  final_item
end