Class: LlmMemory::RedisStore

Inherits:
Object
  • Object
show all
Includes:
Store
Defined in:
lib/llm_memory/stores/redis_store.rb

Instance Method Summary collapse

Methods included from Store

included

Constructor Details

#initialize(index_name: "llm_memory", content_key: "content", vector_key: "vector", metadata_key: "metadata") ⇒ RedisStore

Returns a new instance of RedisStore.

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# File 'lib/llm_memory/stores/redis_store.rb', line 11

def initialize(
  index_name: "llm_memory",
  content_key: "content",
  vector_key: "vector",
  metadata_key: "metadata"
)
  @index_name = index_name
  @content_key = content_key
  @vector_key = vector_key
  @metadata_key = metadata_key
  @client = Redis.new(url: LlmMemory.configuration.redis_url)
end

Instance Method Details

#add(data: []) ⇒ Object

data = [{ content: “”, content_vector: [], metadata: {} }]

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# File 'lib/llm_memory/stores/redis_store.rb', line 78

def add(data: [])
  result = {}
  @client.pipelined do |pipeline|
    data.each_with_index do |d, i|
      key = @index_name # index_name:create_time:metadata_timestamp:uuid
      timestamp = d.dig(:metadata, :timestamp)
      key += ":#{Time.now.strftime("%Y%m%d%H%M%S")}"
      key += ":#{timestamp}"
      key += ":#{SecureRandom.hex(8)}"

      meta_json = d[:metadata].nil? ? "" : d[:metadata].to_json # serialize
      vector_value = d[:vector].map(&:to_f).pack("f*")
      pipeline.hset(
        key,
        {
          @content_key => d[:content],
          @vector_key => vector_value,
          @metadata_key => meta_json
        }
      )
      result[key] = d[:content]
    end
  end
  result
# data.each_with_index do |d, i|
#   key = "#{@index_name}:#{i}"
#   vector_value = d[:content_vector].map(&:to_f).pack("f*")
#   pp vector_value
#   @client.hset(
#     key,
#     {
#       @content_key => d[:content],
#       @vector_key => vector_value,
#       @metadata_key => ""
#     }
#   )
# end
# rescue Redis::Pipeline::Error => e
#   # Handle the error if there is any issue with the pipeline execution
#   puts "Pipeline Error: #{e.message}"
# rescue Redis::BaseConnectionError => e
#   # Handle connection errors
#   puts "Connection Error: #{e.message}"
rescue => e
  # Handle any other errors
  puts "Unexpected Error: #{e.message}"
end

#create_index(dim: 1536, distance_metric: "COSINE") ⇒ Object

dimention: 1536 for ada-002

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# File 'lib/llm_memory/stores/redis_store.rb', line 51

def create_index(dim: 1536, distance_metric: "COSINE")
  # LangChain index
  # schema = (
  #   TextField(name=content_key),
  #   TextField(name=metadata_key),
  #   VectorField(
  #       vector_key,
  #       "FLAT",
  #       {
  #           "TYPE": "FLOAT32",
  #           "DIM": dim,
  #           "DISTANCE_METRIC": distance_metric,
  #       },
  #   ),
  # )
  command = [
    "FT.CREATE", @index_name, "ON", "HASH",
    "PREFIX", "1", "#{@index_name}:",
    "SCHEMA",
    @content_key, "TEXT",
    @metadata_key, "TEXT",
    @vector_key, "VECTOR", "FLAT", 6, "TYPE", "FLOAT32", "DIM", dim, "DISTANCE_METRIC", distance_metric
  ]
  @client.call(command)
end

#delete(key) ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 126

def delete(key)
  @client.del(key) if @client.exists?(key)
end

#delete_all ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 130

def delete_all
  list.keys.each do |key|
    delete(key)
  end
end

#drop_index ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 45

def drop_index
  # DD deletes all document hashes
  @client.call(["FT.DROPINDEX", @index_name, "DD"])
end

#get(key) ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 136

def get(key)
  @client.hgetall(key)
end

#index_exists? ⇒ Boolean

Returns:

  • (Boolean)
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# File 'lib/llm_memory/stores/redis_store.rb', line 36

def index_exists?
  begin
    @client.call(["FT.INFO", @index_name])
  rescue
    return false
  end
  true
end

#info ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 24

def info
  @client.call(["INFO"])
end

#list(*args) ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 140

def list(*args)
  pattern = "#{@index_name}:#{args.first || "*"}"
  @client.keys(pattern)
end

#list_indexes ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 32

def list_indexes
  @client.call("FT._LIST")
end

#load_data(file_path) ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 28

def load_data(file_path)
  CSV.read(file_path)
end

#search(query: [], k: 3) ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 148

def search(query: [], k: 3)
  packed_query = query.map(&:to_f).pack("f*")
  command = [
    "FT.SEARCH",
    @index_name,
    "*=>[KNN #{k} @vector $blob AS vector_score]",
    "PARAMS",
    2,
    "blob",
    packed_query,
    "SORTBY",
    "vector_score",
    "ASC",
    "LIMIT",
    0,
    k,
    "RETURN",
    3,
    "vector_score",
    @content_key,
    @metadata_key,
    "DIALECT",
    2
  ]
  response_list = @client.call(command)
  response_list.shift # the first one is the size
  # now [redis_key1, [],,, ]
  result = response_list.each_slice(2).to_h.values.map { |v|
    v.each_slice(2).to_h.transform_keys(&:to_sym)
  }
  result.each do |item|
    hash = JSON.parse(item[:metadata])
    item[:metadata] = hash.transform_keys(&:to_sym)
  end
  result
end

#update ⇒ Object

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# File 'lib/llm_memory/stores/redis_store.rb', line 145

def update
end