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101 lines
2.7 KiB
101 lines
2.7 KiB
7 months ago
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// 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 customer
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import (
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"context"
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"errors"
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"fmt"
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"go.opentelemetry.io/otel/attribute"
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semconv "go.opentelemetry.io/otel/semconv/v1.24.0"
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"go.opentelemetry.io/otel/trace"
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"go.uber.org/zap"
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"github.com/jaegertracing/jaeger/examples/hotrod/pkg/delay"
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"github.com/jaegertracing/jaeger/examples/hotrod/pkg/log"
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"github.com/jaegertracing/jaeger/examples/hotrod/pkg/tracing"
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"github.com/jaegertracing/jaeger/examples/hotrod/services/config"
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)
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// database simulates Customer repository implemented on top of an SQL database
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type database struct {
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tracer trace.Tracer
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logger log.Factory
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customers map[int]*Customer
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lock *tracing.Mutex
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}
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func newDatabase(tracer trace.Tracer, logger log.Factory) *database {
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return &database{
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tracer: tracer,
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logger: logger,
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lock: &tracing.Mutex{
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SessionBaggageKey: "request",
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LogFactory: logger,
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},
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customers: map[int]*Customer{
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123: {
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ID: "123",
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Name: "Rachel's_Floral_Designs",
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Location: "115,277",
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},
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567: {
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ID: "567",
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Name: "Amazing_Coffee_Roasters",
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Location: "211,653",
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},
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392: {
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ID: "392",
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Name: "Trom_Chocolatier",
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Location: "577,322",
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},
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731: {
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ID: "731",
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Name: "Japanese_Desserts",
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Location: "728,326",
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},
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},
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}
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}
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func (d *database) Get(ctx context.Context, customerID int) (*Customer, error) {
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d.logger.For(ctx).Info("Loading customer", zap.Int("customer_id", customerID))
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ctx, span := d.tracer.Start(ctx, "SQL SELECT", trace.WithSpanKind(trace.SpanKindClient))
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span.SetAttributes(
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semconv.PeerServiceKey.String("mysql"),
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attribute.
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Key("sql.query").
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String(fmt.Sprintf("SELECT * FROM customer WHERE customer_id=%d", customerID)),
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)
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defer span.End()
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if !config.MySQLMutexDisabled {
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// simulate misconfigured connection pool that only gives one connection at a time
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d.lock.Lock(ctx)
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defer d.lock.Unlock()
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}
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// simulate RPC delay
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delay.Sleep(config.MySQLGetDelay, config.MySQLGetDelayStdDev)
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if customer, ok := d.customers[customerID]; ok {
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return customer, nil
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}
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return nil, errors.New("invalid customer ID")
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}
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