This library provides a Redis-backed persistence mechanism (data store) for the LaunchDarkly Rust SDK, replacing the default in-memory data store.
The Redis API implementation it uses is redis. There are other Redis client implementations for Rust; if LaunchDarkly SDK Redis integrations using other Redis clients are released, they will be in separate repositories.
For more information, see also: Using a persistent feature store.
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This assumes that you have already installed the LaunchDarkly Rust SDK.
rust
use launchdarkly_server_sdk::{Client, ConfigBuilder, PersistentDataStoreBuilder};
use launchdarkly_server_sdk_redis::RedisPersistentDataStoreFactory;
use std::sync::Arc;
ConfigBuilder with an instance of the PersistentDataStoreBuilder. You may specify any custom Redis options using the methods of RedisPersistentDataStoreFactory. For instance, to customize the Redis URL:```rust let mut redisfactory = RedisPersistentDataStoreFactory::new(); redisfactory.url("redis://localhost:9000"); let persistentdatastorebuilder = PersistentDataStoreBuilder::new(Arc::new(redisfactory));
let mut configbuilder = ConfigBuilder::new(&sdkkey); configbuilder = configbuilder.datastore(&persistentdatastorebuilder); ```
By default, the store will try to connect to a local Redis instance on port 6379.
The LaunchDarkly SDK has a standard caching mechanism for any persistent data store, to reduce database traffic. This is configured through the SDK's PersistentDataStoreBuilder class as described in the SDK documentation. For instance, to specify a cache TTL of 5 minutes:
rust
let mut persistent_data_store_builder =
PersistentDataStoreBuilder::new(Arc::new(redis_factory));
persistent_data_store_builder.cache_time(std::time::Duration::from_secs(5 * 60));