flow::recording_rules::frontend_client

Enum FrontendClient

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pub enum FrontendClient {
    Distributed {
        meta_client: Arc<MetaClient>,
    },
    Standalone {
        database_client: DatabaseWithPeer,
    },
}
Expand description

A simple frontend client able to execute sql using grpc protocol

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Distributed

Fields

§meta_client: Arc<MetaClient>
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Standalone

Fields

§database_client: DatabaseWithPeer

for the sake of simplicity still use grpc even in standalone mode notice the client here should all be lazy, so that can wait after frontend is booted then make conn TODO(discord9): not use grpc under standalone mode

Implementations§

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impl FrontendClient

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pub fn from_meta_client(meta_client: Arc<MetaClient>) -> Self

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pub fn from_static_grpc_addr(addr: String) -> Self

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impl FrontendClient

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async fn scan_for_frontend(&self) -> Result<Vec<(NodeInfoKey, NodeInfo)>, Error>

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async fn get_last_active_frontend(&self) -> Result<DatabaseWithPeer, Error>

Get the database with max last_activity_ts

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pub async fn get_database_client(&self) -> Result<DatabaseWithPeer, Error>

Get a database client, and possibly update it before returning.

Trait Implementations§

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impl Debug for FrontendClient

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fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more

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