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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package flight_test
import (
"context"
"fmt"
"net"
"github.com/apache/arrow-go/v18/arrow/flight"
"google.golang.org/grpc"
"google.golang.org/grpc/credentials/insecure"
"google.golang.org/grpc/health"
healthgrpc "google.golang.org/grpc/health/grpc_health_v1"
)
func ExampleRegisterFlightServiceServer() {
s := grpc.NewServer()
healthSrv := health.NewServer()
healthgrpc.RegisterHealthServer(s, healthSrv)
// add methods to this to override the desired methods
// like DoGet, DoPut, etc.
server := struct {
flight.BaseFlightServer
}{}
flight.RegisterFlightServiceServer(s, &server)
healthSrv.SetServingStatus("test", healthgrpc.HealthCheckResponse_SERVING)
lis, err := net.Listen("tcp", "localhost:0")
if err != nil {
panic(err)
}
go s.Serve(lis)
defer s.Stop()
conn, err := grpc.NewClient(lis.Addr().String(),
grpc.WithTransportCredentials(insecure.NewCredentials()))
if err != nil {
panic(err)
}
defer conn.Close()
hc := healthgrpc.NewHealthClient(conn)
rsp, err := hc.Check(context.Background(), &healthgrpc.HealthCheckRequest{Service: "test"})
if err != nil {
panic(err)
}
fmt.Println(rsp.Status)
fc := flight.NewClientFromConn(conn, nil)
// we didn't implement GetFlightInfo so we should get an Unimplemented
// error, proving it did call into the base flight server. If we didn't
// register the service, we'd get an error that says "unknown service arrow.flight.protocol.FlightService"
_, err = fc.GetFlightInfo(context.Background(), &flight.FlightDescriptor{})
fmt.Println(err)
// Output:
// SERVING
// rpc error: code = Unimplemented desc = method GetFlightInfo not implemented
}
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