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76 lines
2.3 KiB
76 lines
2.3 KiB
// Copyright (c) 2019 The Jaeger Authors.
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// Copyright (c) 2017 Uber Technologies, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package driver
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import (
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"context"
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"time"
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"go.opentelemetry.io/contrib/instrumentation/google.golang.org/grpc/otelgrpc"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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"google.golang.org/grpc"
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"google.golang.org/grpc/credentials/insecure"
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"github.com/jaegertracing/jaeger/examples/hotrod/pkg/log"
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)
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// Client is a remote client that implements driver.Interface
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type Client struct {
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logger log.Factory
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client DriverServiceClient
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}
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// NewClient creates a new driver.Client
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func NewClient(tracerProvider trace.TracerProvider, logger log.Factory, hostPort string) *Client {
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conn, err := grpc.Dial(hostPort,
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grpc.WithTransportCredentials(insecure.NewCredentials()),
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grpc.WithStatsHandler(otelgrpc.NewClientHandler(otelgrpc.WithTracerProvider(tracerProvider))),
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)
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if err != nil {
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logger.Bg().Fatal("Cannot create gRPC connection", zap.Error(err))
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}
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client := NewDriverServiceClient(conn)
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return &Client{
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logger: logger,
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client: client,
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}
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}
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// FindNearest implements driver.Interface#FindNearest as an RPC
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func (c *Client) FindNearest(ctx context.Context, location string) ([]Driver, error) {
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c.logger.For(ctx).Info("Finding nearest drivers", zap.String("location", location))
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ctx, cancel := context.WithTimeout(ctx, 1*time.Second)
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defer cancel()
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response, err := c.client.FindNearest(ctx, &DriverLocationRequest{Location: location})
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if err != nil {
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return nil, err
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}
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return fromProto(response), nil
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}
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func fromProto(response *DriverLocationResponse) []Driver {
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retMe := make([]Driver, len(response.Locations))
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for i, result := range response.Locations {
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retMe[i] = Driver{
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DriverID: result.DriverID,
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Location: result.Location,
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}
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}
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return retMe
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}
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