eredis_cluster

-type anystring() :: string() | bitstring().

-type redis_simple_command() :: [anystring() | integer()].
-type redis_pipeline_command() :: [redis_simple_command()].
-type redis_command() :: redis_simple_command() | redis_pipeline_command().

-type redis_error_result() :: Reason::bitstring() | no_connection
    | invalid_cluster_command | tcp_closed.
-type redis_success_result() :: Result::bitstring() | undefined.
-type redis_simple_result() :: {ok, redis_success_result()}
    | {error, redis_error_result()}.
-type redis_pipeline_result() :: [redis_simple_result()].
-type redis_transaction_result() :: {ok, [redis_success_result()]}
    | {ok, undefined} % EXEC reply undefined if the transaction was aborted
    | {error, redis_error_result()}.

-type optimistic_locking_error_result() :: {error, resource_busy} % lock failed
    | {error, redis_error_result()}.
-type optimistic_locking_result() :: optimistic_locking_error_result()
    | {{ok, undefined}, any()} % lock failed once
    | {{ok, redis_success_result()}, any()}
    | {{ok, [redis_success_result()]}, any()}.

-type redis_result() :: redis_simple_result() | redis_pipeline_result()
    | optimistic_locking_result().

-type options() :: [{term(), term()}].

-record(node, {
    address :: string(),
    port :: integer(),
    options :: options() | undefined,           % not used for init_nodes
    pool :: atom()                              % not used for init_nodes
}).

-record(slots_map, {
    start_slot :: integer(),
    end_slot :: integer(),
    index :: integer(),
    node :: #node{}
}).

-define(REDIS_CLUSTER_HASH_SLOTS, 16384).
-define(OL_TRANSACTION_TTL, 16).
-define(REDIS_CLUSTER_REQUEST_TTL, 16).
-define(REDIS_RETRY_DELAY, 100).

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