components::Redis Class Reference

Table of Contents

• Detailed Description
• Dynamic options:
• Static options:
• Static configuration example:
• Secdist format
• Public Member Functions
• Static Public Member Functions
• Static Public Attributes

#include <userver/storages/redis/component.hpp>

Detailed Description

Redis client component.

Provides access to a redis cluster.

Dynamic options:

• REDIS_COMMANDS_BUFFERING_SETTINGS
• REDIS_DEFAULT_COMMAND_CONTROL
• REDIS_METRICS_SETTINGS
• REDIS_PUBSUB_METRICS_SETTINGS
• REDIS_RETRY_BUDGET_SETTINGS
• REDIS_REPLICA_MONITORING_SETTINGS
• REDIS_SUBSCRIBER_DEFAULT_COMMAND_CONTROL
• REDIS_SUBSCRIPTIONS_REBALANCE_MIN_INTERVAL_SECONDS
• REDIS_WAIT_CONNECTED

Static options:

Name	Description	Default value
thread_pools.redis_thread_pool_size	thread count to serve Redis requests	-
thread_pools.sentinel_thread_pool_size	thread count to serve sentinel requests.	-
groups	array of redis clusters to work with excluding subscribers	-
groups.[].config_name	key name in secdist with options for this cluster	-
groups.[].db	name to refer to the cluster in components::Redis::GetClient()	-
groups.[].sharding_strategy	one of RedisCluster, KeyShardCrc32, KeyShardTaximeterCrc32 or KeyShardGpsStorageDriver	"KeyShardTaximeterCrc32"
groups.[].allow_reads_from_master	allows read requests from master instance	false
subscribe_groups	array of redis clusters to work with in subscribe mode	-
subscribe_groups.[].config_name	key name in secdist with options for this cluster	-
subscribe_groups.[].db	name to refer to the cluster in components::Redis::GetSubscribeClient()	-
subscribe_groups.[].sharding_strategy	either RedisCluster or KeyShardTaximeterCrc32	"KeyShardTaximeterCrc32"

Static configuration example:

redis:
    groups:
      - config_name: taxi-tmp
        db: taxi-tmp
        sharding_strategy: "RedisCluster"
      - config_name: taxi-tmp-pubsub
        db: taxi-tmp-pubsub
    subscribe_groups:
      - config_name: taxi-tmp-pubsub
        db: taxi-tmp-pubsub
    thread_pools:
        redis_thread_pool_size: 8
        sentinel_thread_pool_size: 1

Secdist format

If a config_name option is provided, for example groups.some.config_name: some_name_of_your_database, then the Secdist entry for that alias should look like following:

{
  "redis_settings": {
    "some_name_of_your_database": {
      "password": "the_password_of_your_database",
      "sentinels": [
        {"host": "the_host1_of_your_database", "port": 11564}
      ],
      "shards": [
        {"name": "test_master0"}
      ]
    }
  }
}

Examples

samples/redis_service/redis_service.cpp.

Definition at line 113 of file component.hpp.

Inheritance diagram for components::Redis:

Collaboration diagram for components::Redis:

Public Member Functions
	Redis (const ComponentConfig &config, const ComponentContext &component_context)
std::shared_ptr< storages::redis::Client >	GetClient (const std::string &name, ::redis::RedisWaitConnected wait_connected={}) const
std::shared_ptr< redis::Sentinel >	Client (const std::string &name) const
std::shared_ptr< storages::redis::SubscribeClient >	GetSubscribeClient (const std::string &name, ::redis::RedisWaitConnected wait_connected={}) const
Public Member Functions inherited from components::LoggableComponentBase
	LoggableComponentBase (const ComponentConfig &, const ComponentContext &)
	LoggableComponentBase (LoggableComponentBase &&)=delete
	LoggableComponentBase (const LoggableComponentBase &)=delete
	~LoggableComponentBase () override=default
ComponentHealth	GetComponentHealth () const override
void	OnLoadingCancelled () override
void	OnAllComponentsLoaded () override
void	OnAllComponentsAreStopping () override

Static Public Member Functions
static yaml_config::Schema	GetStaticConfigSchema ()
Static Public Member Functions inherited from components::LoggableComponentBase
static yaml_config::Schema	GetStaticConfigSchema ()

Static Public Attributes
static constexpr std::string_view	kName = "redis"
	The default name of components::Redis.

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The documentation for this class was generated from the following file:

• userver/storages/redis/component.hpp