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106 lines
3.1 KiB
106 lines
3.1 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 customer
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import (
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"encoding/json"
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"net/http"
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"strconv"
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"time"
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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/httperr"
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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/pkg/metrics"
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)
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// Server implements Customer service
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type Server struct {
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hostPort string
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tracer trace.TracerProvider
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logger log.Factory
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database *database
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}
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// NewServer creates a new customer.Server
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func NewServer(hostPort string, otelExporter string, metricsFactory metrics.Factory, logger log.Factory) *Server {
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return &Server{
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hostPort: hostPort,
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tracer: tracing.InitOTEL("customer", otelExporter, metricsFactory, logger),
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logger: logger,
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database: newDatabase(
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tracing.InitOTEL("mysql", otelExporter, metricsFactory, logger).Tracer("mysql"),
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logger.With(zap.String("component", "mysql")),
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),
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}
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}
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// Run starts the Customer server
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func (s *Server) Run() error {
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mux := s.createServeMux()
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s.logger.Bg().Info("Starting", zap.String("address", "http://"+s.hostPort))
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server := &http.Server{
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Addr: s.hostPort,
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Handler: mux,
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ReadHeaderTimeout: 3 * time.Second,
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}
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return server.ListenAndServe()
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}
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func (s *Server) createServeMux() http.Handler {
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mux := tracing.NewServeMux(false, s.tracer, s.logger)
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mux.Handle("/customer", http.HandlerFunc(s.customer))
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return mux
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}
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func (s *Server) customer(w http.ResponseWriter, r *http.Request) {
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ctx := r.Context()
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s.logger.For(ctx).Info("HTTP request received", zap.String("method", r.Method), zap.Stringer("url", r.URL))
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if err := r.ParseForm(); httperr.HandleError(w, err, http.StatusBadRequest) {
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s.logger.For(ctx).Error("bad request", zap.Error(err))
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return
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}
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customer := r.Form.Get("customer")
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if customer == "" {
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http.Error(w, "Missing required 'customer' parameter", http.StatusBadRequest)
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return
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}
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customerID, err := strconv.Atoi(customer)
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if err != nil {
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http.Error(w, "Parameter 'customer' is not an integer", http.StatusBadRequest)
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return
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}
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response, err := s.database.Get(ctx, customerID)
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if httperr.HandleError(w, err, http.StatusInternalServerError) {
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s.logger.For(ctx).Error("request failed", zap.Error(err))
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return
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}
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data, err := json.Marshal(response)
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if httperr.HandleError(w, err, http.StatusInternalServerError) {
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s.logger.For(ctx).Error("cannot marshal response", zap.Error(err))
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(data)
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}
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