Package org.apache.arrow.flight.impl

Class FlightServiceGrpc.FlightServiceBlockingStub

java.lang.Object
io.grpc.stub.AbstractStub<S>
io.grpc.stub.AbstractBlockingStub<FlightServiceGrpc.FlightServiceBlockingStub>
org.apache.arrow.flight.impl.FlightServiceGrpc.FlightServiceBlockingStub
Enclosing class:
FlightServiceGrpc
public static final class FlightServiceGrpc.FlightServiceBlockingStub extends io.grpc.stub.AbstractBlockingStub<FlightServiceGrpc.FlightServiceBlockingStub>
A stub to allow clients to do synchronous rpc calls to service FlightService. 
 A flight service is an endpoint for retrieving or storing Arrow data. A
 flight service can expose one or more predefined endpoints that can be
 accessed using the Arrow Flight Protocol. Additionally, a flight service
 can expose a set of actions that are available.

  • Method Details

    • build

      protected FlightServiceGrpc.FlightServiceBlockingStub build(io.grpc.Channel channel, io.grpc.CallOptions callOptions)
      Specified by:
      build in class io.grpc.stub.AbstractStub<FlightServiceGrpc.FlightServiceBlockingStub>

    • listFlights

      public Iterator<Flight.FlightInfo> listFlights(Flight.Criteria request)
       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.

    • getFlightInfo

      public Flight.FlightInfo getFlightInfo(Flight.FlightDescriptor request)
       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.

    • pollFlightInfo

      public Flight.PollInfo pollFlightInfo(Flight.FlightDescriptor request)
       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.)
 A client can consume any available results before
 the query is completed. See PollInfo.info for details.
 A client can poll the updated query status by calling
 PollFlightInfo() with PollInfo.flight_descriptor. A server
 should not respond until the result would be different from last
 time. That way, the client can "long poll" for updates
 without constantly making requests. Clients can set a short timeout
 to avoid blocking calls if desired.
 A client can't use PollInfo.flight_descriptor after
 PollInfo.expiration_time passes. A server might not accept the
 retry descriptor anymore and the query may be cancelled.
 A client may use the CancelFlightInfo action with
 PollInfo.info to cancel the running query.

    • getSchema

      public Flight.SchemaResult getSchema(Flight.FlightDescriptor request)
       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.

    • doGet

      public Iterator<Flight.FlightData> doGet(Flight.Ticket request)
       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.

    • doAction

      public Iterator<Flight.Result> doAction(Flight.Action request)
       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.

    • listActions

      public Iterator<Flight.ActionType> listActions(Flight.Empty request)
       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.