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use redis::{
ErrorKind, IntoConnectionInfo, RedisError,
sentinel::{SentinelClient, SentinelNodeConnectionInfo, SentinelServerType},
};
use serde::Deserialize;
use tokio::sync::Mutex;
struct LockedSentinelClient(pub(crate) Mutex<SentinelClient>);
/// ConnectionManager that implements `bb8::ManageConnection` and supports
/// asynchronous Sentinel connections via `redis::sentinel::SentinelClient`
pub struct RedisSentinelConnectionManager {
client: LockedSentinelClient,
}
impl RedisSentinelConnectionManager {
pub fn new<T: IntoConnectionInfo>(
info: Vec<T>,
service_name: String,
node_connection_info: Option<SentinelNodeConnectionInfo>,
) -> Result<RedisSentinelConnectionManager, RedisError> {
Ok(RedisSentinelConnectionManager {
client: LockedSentinelClient(Mutex::new(SentinelClient::build(
info,
service_name,
node_connection_info,
SentinelServerType::Master,
)?)),
})
}
}
impl bb8::ManageConnection for RedisSentinelConnectionManager {
type Connection = redis::aio::MultiplexedConnection;
type Error = RedisError;
async fn connect(&self) -> Result<Self::Connection, Self::Error> {
self.client.0.lock().await.get_async_connection().await
}
async fn is_valid(&self, conn: &mut Self::Connection) -> Result<(), Self::Error> {
let pong: String = redis::cmd("PING").query_async(conn).await?;
match pong.as_str() {
"PONG" => Ok(()),
_ => Err((ErrorKind::ResponseError, "ping request").into()),
}
}
fn has_broken(&self, _: &mut Self::Connection) -> bool {
false
}
}
#[derive(Clone, Debug, Deserialize, Eq, PartialEq)]
pub struct SentinelConfig {
#[serde(rename = "sentinel_service_name")]
pub service_name: String,
#[serde(default)]
pub redis_tls_mode_secure: bool,
pub redis_db: Option<i64>,
pub redis_username: Option<String>,
pub redis_password: Option<String>,
#[serde(default)]
pub redis_use_resp3: bool,
}
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