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

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

Overview

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

Returns a new instance of RedisFeatureStoreCore.

Since:

  • 5.5.0



151
152
153
154
155
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 151

def initialize(opts)
  super(opts)

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

Instance Method Details

#description ⇒ Object

Since:

  • 5.5.0



157
158
159
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 157

def description
  "RedisFeatureStore"
end

#get_all_internal(kind) ⇒ Object

Since:

  • 5.5.0



184
185
186
187
188
189
190
191
192
193
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 184

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

Since:

  • 5.5.0



178
179
180
181
182
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 178

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

#init_internal(all_data) ⇒ Object

Since:

  • 5.5.0



161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 161

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

Returns:

  • (Boolean)

Since:

  • 5.5.0



227
228
229
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 227

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

#upsert_internal(kind, new_item) ⇒ Object

Since:

  • 5.5.0



195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
 
# File 'lib/ldclient-rb/impl/integrations/redis_impl.rb', line 195

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