liquid_cache_server

Struct LiquidCacheService

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pub struct LiquidCacheService { /* private fields */ }
Expand description

The LiquidCache server.

§Example

use arrow_flight::flight_service_server::FlightServiceServer;
use datafusion::prelude::SessionContext;
use liquid_cache_server::LiquidCacheService;
use tonic::transport::Server;
use liquid_cache_server::storage::policies::LruPolicy;
let liquid_cache = LiquidCacheService::new(SessionContext::new(), None, None, Default::default(), Box::new(LruPolicy::new())).unwrap();
let flight = FlightServiceServer::new(liquid_cache);
Server::builder()
    .add_service(flight)
    .serve("0.0.0.0:15214".parse().unwrap());

Implementations§

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impl LiquidCacheService

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pub fn try_new() -> Result<Self>

Create a new LiquidCacheService with a default SessionContext With no disk cache and unbounded memory usage.

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pub fn new( ctx: SessionContext, max_cache_bytes: Option<usize>, disk_cache_dir: Option<PathBuf>, cache_mode: CacheMode, cache_policy: Box<dyn CachePolicy>, ) -> Result<Self>

Create a new LiquidCacheService with a custom SessionContext

§Arguments
  • ctx - The SessionContext to use
  • max_cache_bytes - The maximum number of bytes to cache in memory
  • disk_cache_dir - The directory to store the disk cache
  • cache_mode - The CacheMode to use
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pub fn cache(&self) -> &Option<LiquidCacheRef>

Get a reference to the cache

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pub fn context() -> Result<SessionContext, DataFusionError>

Create a new SessionContext with good defaults This is the recommended way to create a SessionContext for LiquidCache

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pub fn get_parquet_cache_dir(&self) -> &PathBuf

Get the parquet cache directory

Trait Implementations§

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impl Default for LiquidCacheService

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl FlightSqlService for LiquidCacheService

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type FlightService = LiquidCacheService

When impl FlightSqlService, you can always set FlightService to Self
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fn do_handshake<'life0, 'async_trait>( &'life0 self, _request: Request<Streaming<HandshakeRequest>>, ) -> Pin<Box<dyn Future<Output = Result<Response<Pin<Box<dyn Stream<Item = Result<HandshakeResponse, Status>> + Send>>>, Status>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Accept authentication and return a token https://arrow.apache.org/docs/format/Flight.html#authentication
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fn do_get_fallback<'life0, 'async_trait>( &'life0 self, _request: Request<Ticket>, message: Any, ) -> Pin<Box<dyn Future<Output = Result<Response<<Self as FlightService>::DoGetStream>, Status>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Implementors may override to handle additional calls to do_get()
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fn do_put_prepared_statement_update<'life0, 'async_trait>( &'life0 self, _handle: CommandPreparedStatementUpdate, _request: Request<PeekableFlightDataStream>, ) -> Pin<Box<dyn Future<Output = Result<i64, Status>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Execute an update SQL prepared statement.
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fn do_action_fallback<'life0, 'async_trait>( &'life0 self, request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<Response<<Self as FlightService>::DoActionStream>, Status>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Implementors may override to handle additional calls to do_action()
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fn register_sql_info<'life0, 'life1, 'async_trait>( &'life0 self, _id: i32, _result: &'life1 SqlInfo, ) -> Pin<Box<dyn Future<Output = ()> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Register a new SqlInfo result, making it available when calling GetSqlInfo.
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fn get_flight_info_statement<'life0, 'async_trait>( &'life0 self, _query: CommandStatementQuery, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for executing a SQL query.
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fn get_flight_info_substrait_plan<'life0, 'async_trait>( &'life0 self, _query: CommandStatementSubstraitPlan, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for executing a substrait plan.
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fn get_flight_info_prepared_statement<'life0, 'async_trait>( &'life0 self, _query: CommandPreparedStatementQuery, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for executing an already created prepared statement.
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fn get_flight_info_catalogs<'life0, 'async_trait>( &'life0 self, _query: CommandGetCatalogs, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for listing catalogs.
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fn get_flight_info_schemas<'life0, 'async_trait>( &'life0 self, _query: CommandGetDbSchemas, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for listing schemas.
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fn get_flight_info_tables<'life0, 'async_trait>( &'life0 self, _query: CommandGetTables, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for listing tables.
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fn get_flight_info_table_types<'life0, 'async_trait>( &'life0 self, _query: CommandGetTableTypes, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about the table types.
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fn get_flight_info_sql_info<'life0, 'async_trait>( &'life0 self, _query: CommandGetSqlInfo, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo for retrieving other information (See SqlInfo).
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fn get_flight_info_primary_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetPrimaryKeys, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about primary and foreign keys.
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fn get_flight_info_exported_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetExportedKeys, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about exported keys.
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fn get_flight_info_imported_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetImportedKeys, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about imported keys.
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fn get_flight_info_cross_reference<'life0, 'async_trait>( &'life0 self, _query: CommandGetCrossReference, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about cross reference.
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fn get_flight_info_xdbc_type_info<'life0, 'async_trait>( &'life0 self, _query: CommandGetXdbcTypeInfo, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightInfo to extract information about the supported XDBC types.
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fn get_flight_info_fallback<'life0, 'async_trait>( &'life0 self, cmd: Command, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Implementors may override to handle additional calls to get_flight_info()
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fn do_get_statement<'life0, 'async_trait>( &'life0 self, _ticket: TicketStatementQuery, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the query results.
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fn do_get_prepared_statement<'life0, 'async_trait>( &'life0 self, _query: CommandPreparedStatementQuery, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the prepared statement query results.
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fn do_get_catalogs<'life0, 'async_trait>( &'life0 self, _query: CommandGetCatalogs, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the list of catalogs.
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fn do_get_schemas<'life0, 'async_trait>( &'life0 self, _query: CommandGetDbSchemas, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the list of schemas.
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fn do_get_tables<'life0, 'async_trait>( &'life0 self, _query: CommandGetTables, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the list of tables.
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fn do_get_table_types<'life0, 'async_trait>( &'life0 self, _query: CommandGetTableTypes, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the table types.
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fn do_get_sql_info<'life0, 'async_trait>( &'life0 self, _query: CommandGetSqlInfo, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the list of SqlInfo results.
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fn do_get_primary_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetPrimaryKeys, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the primary and foreign keys.
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fn do_get_exported_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetExportedKeys, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the exported keys.
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fn do_get_imported_keys<'life0, 'async_trait>( &'life0 self, _query: CommandGetImportedKeys, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the imported keys.
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fn do_get_cross_reference<'life0, 'async_trait>( &'life0 self, _query: CommandGetCrossReference, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the cross reference.
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fn do_get_xdbc_type_info<'life0, 'async_trait>( &'life0 self, _query: CommandGetXdbcTypeInfo, _request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Get a FlightDataStream containing the data related to the supported XDBC types.
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fn do_put_fallback<'life0, 'async_trait>( &'life0 self, _request: Request<PeekableFlightDataStream>, message: Any, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoPutStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Implementors may override to handle additional calls to do_put()
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fn do_put_statement_update<'life0, 'async_trait>( &'life0 self, _ticket: CommandStatementUpdate, _request: Request<PeekableFlightDataStream>, ) -> Pin<Box<dyn Future<Output = Result<i64, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Execute an update SQL statement.
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fn do_put_statement_ingest<'life0, 'async_trait>( &'life0 self, _ticket: CommandStatementIngest, _request: Request<PeekableFlightDataStream>, ) -> Pin<Box<dyn Future<Output = Result<i64, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Execute a bulk ingestion.
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fn do_put_prepared_statement_query<'life0, 'async_trait>( &'life0 self, _query: CommandPreparedStatementQuery, _request: Request<PeekableFlightDataStream>, ) -> Pin<Box<dyn Future<Output = Result<DoPutPreparedStatementResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Bind parameters to given prepared statement. Read more
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fn do_put_substrait_plan<'life0, 'async_trait>( &'life0 self, _query: CommandStatementSubstraitPlan, _request: Request<PeekableFlightDataStream>, ) -> Pin<Box<dyn Future<Output = Result<i64, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Execute a substrait plan
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fn list_custom_actions<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Option<Vec<Result<ActionType, Status>>>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Add custom actions to list_actions() result
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fn do_action_create_prepared_statement<'life0, 'async_trait>( &'life0 self, _query: ActionCreatePreparedStatementRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<ActionCreatePreparedStatementResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Create a prepared statement from given SQL statement.
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fn do_action_close_prepared_statement<'life0, 'async_trait>( &'life0 self, _query: ActionClosePreparedStatementRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<(), Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Close a prepared statement.
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fn do_action_create_prepared_substrait_plan<'life0, 'async_trait>( &'life0 self, _query: ActionCreatePreparedSubstraitPlanRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<ActionCreatePreparedStatementResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Create a prepared substrait plan.
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fn do_action_begin_transaction<'life0, 'async_trait>( &'life0 self, _query: ActionBeginTransactionRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<ActionBeginTransactionResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Begin a transaction
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fn do_action_end_transaction<'life0, 'async_trait>( &'life0 self, _query: ActionEndTransactionRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<(), Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

End a transaction
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fn do_action_begin_savepoint<'life0, 'async_trait>( &'life0 self, _query: ActionBeginSavepointRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<ActionBeginSavepointResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Begin a savepoint
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fn do_action_end_savepoint<'life0, 'async_trait>( &'life0 self, _query: ActionEndSavepointRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<(), Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

End a savepoint
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fn do_action_cancel_query<'life0, 'async_trait>( &'life0 self, _query: ActionCancelQueryRequest, _request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<ActionCancelQueryResult, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

Cancel a query
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fn do_exchange_fallback<'life0, 'async_trait>( &'life0 self, _request: Request<Streaming<FlightData>>, ) -> Pin<Box<dyn Future<Output = Result<Response<Self::DoExchangeStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, Self: 'async_trait,

do_exchange Implementors may override to handle additional calls to do_exchange()

Auto Trait Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> FlightService for T
where T: 'static + FlightSqlService + Send,

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type HandshakeStream = Pin<Box<dyn Stream<Item = Result<HandshakeResponse, Status>> + Send>>

Server streaming response type for the Handshake method.
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type ListFlightsStream = Pin<Box<dyn Stream<Item = Result<FlightInfo, Status>> + Send>>

Server streaming response type for the ListFlights method.
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type DoGetStream = Pin<Box<dyn Stream<Item = Result<FlightData, Status>> + Send>>

Server streaming response type for the DoGet method.
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type DoPutStream = Pin<Box<dyn Stream<Item = Result<PutResult, Status>> + Send>>

Server streaming response type for the DoPut method.
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type DoActionStream = Pin<Box<dyn Stream<Item = Result<Result, Status>> + Send>>

Server streaming response type for the DoAction method.
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type ListActionsStream = Pin<Box<dyn Stream<Item = Result<ActionType, Status>> + Send>>

Server streaming response type for the ListActions method.
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type DoExchangeStream = Pin<Box<dyn Stream<Item = Result<FlightData, Status>> + Send>>

Server streaming response type for the DoExchange method.
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fn handshake<'life0, 'async_trait>( &'life0 self, request: Request<Streaming<HandshakeRequest>>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::HandshakeStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Handshake between client and server. Depending on the server, the handshake may be required to determine the token that should be used for future operations. Both request and response are streams to allow multiple round-trips depending on auth mechanism.
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fn list_flights<'life0, 'async_trait>( &'life0 self, _request: Request<Criteria>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::ListFlightsStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Get a list of available streams given a particular criteria. Most flight services will expose one or more streams that are readily available for retrieval. This api allows listing the streams available for consumption. A user can also provide a criteria. The criteria can limit the subset of streams that can be listed via this interface. Each flight service allows its own definition of how to consume criteria.
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fn get_flight_info<'life0, 'async_trait>( &'life0 self, request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<FlightInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

For a given FlightDescriptor, get information about how the flight can be consumed. This is a useful interface if the consumer of the interface already can identify the specific flight to consume. This interface can also allow a consumer to generate a flight stream through a specified descriptor. For example, a flight descriptor might be something that includes a SQL statement or a Pickled Python operation that will be executed. In those cases, the descriptor will not be previously available within the list of available streams provided by ListFlights but will be available for consumption for the duration defined by the specific flight service.
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fn poll_flight_info<'life0, 'async_trait>( &'life0 self, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<PollInfo>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

For a given FlightDescriptor, start a query and get information to poll its execution status. This is a useful interface if the query may be a long-running query. The first PollFlightInfo call should return as quickly as possible. (GetFlightInfo doesn’t return until the query is complete.) Read more
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fn get_schema<'life0, 'async_trait>( &'life0 self, _request: Request<FlightDescriptor>, ) -> Pin<Box<dyn Future<Output = Result<Response<SchemaResult>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

For a given FlightDescriptor, get the Schema as described in Schema.fbs::Schema This is used when a consumer needs the Schema of flight stream. Similar to GetFlightInfo this interface may generate a new flight that was not previously available in ListFlights.
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fn do_get<'life0, 'async_trait>( &'life0 self, request: Request<Ticket>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::DoGetStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Retrieve a single stream associated with a particular descriptor associated with the referenced ticket. A Flight can be composed of one or more streams where each stream can be retrieved using a separate opaque ticket that the flight service uses for managing a collection of streams.
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fn do_put<'life0, 'async_trait>( &'life0 self, request: Request<Streaming<FlightData>>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::DoPutStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Push a stream to the flight service associated with a particular flight stream. This allows a client of a flight service to upload a stream of data. Depending on the particular flight service, a client consumer could be allowed to upload a single stream per descriptor or an unlimited number. In the latter, the service might implement a ‘seal’ action that can be applied to a descriptor once all streams are uploaded.
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fn list_actions<'life0, 'async_trait>( &'life0 self, _request: Request<Empty>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::ListActionsStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

A flight service exposes all of the available action types that it has along with descriptions. This allows different flight consumers to understand the capabilities of the flight service.
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fn do_action<'life0, 'async_trait>( &'life0 self, request: Request<Action>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::DoActionStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Flight services can support an arbitrary number of simple actions in addition to the possible ListFlights, GetFlightInfo, DoGet, DoPut operations that are potentially available. DoAction allows a flight client to do a specific action against a flight service. An action includes opaque request and response objects that are specific to the type action being undertaken.
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fn do_exchange<'life0, 'async_trait>( &'life0 self, request: Request<Streaming<FlightData>>, ) -> Pin<Box<dyn Future<Output = Result<Response<<T as FlightService>::DoExchangeStream>, Status>> + Send + 'async_trait>>
where 'life0: 'async_trait, T: 'async_trait,

Open a bidirectional data channel for a given descriptor. This allows clients to send and receive arbitrary Arrow data and application-specific metadata in a single logical stream. In contrast to DoGet/DoPut, this is more suited for clients offloading computation (rather than storage) to a Flight service.
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more
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impl<T> IntoRequest<T> for T

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fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request
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impl<T> Pointable for T

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const ALIGN: usize

The alignment of pointer.
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type Init = T

The type for initializers.
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unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more
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unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more
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unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more
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unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more
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impl<T> PolicyExt for T
where T: ?Sized,

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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow only if self and other return Action::Follow. Read more
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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more
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impl<T> ErasedDestructor for T
where T: 'static,