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server.go
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server.go
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// Copyright (c) 2017 Uber Technologies, Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
package customer
import (
"encoding/json"
"net/http"
"github.com/opentracing/opentracing-go"
"github.com/uber/jaeger-lib/metrics"
"go.uber.org/zap"
"github.com/uber/jaeger/examples/hotrod/pkg/httperr"
"github.com/uber/jaeger/examples/hotrod/pkg/log"
"github.com/uber/jaeger/examples/hotrod/pkg/tracing"
)
// Server implements Customer service
type Server struct {
hostPort string
tracer opentracing.Tracer
logger log.Factory
database *database
}
// NewServer creates a new customer.Server
func NewServer(hostPort string, tracer opentracing.Tracer, metricsFactory metrics.Factory, logger log.Factory) *Server {
return &Server{
hostPort: hostPort,
tracer: tracer,
logger: logger,
database: newDatabase(
tracing.Init("mysql", metricsFactory.Namespace("mysql", nil), logger),
logger.With(zap.String("component", "mysql")),
),
}
}
// Run starts the Customer server
func (s *Server) Run() error {
mux := s.createServeMux()
s.logger.Bg().Info("Starting", zap.String("address", "http://"+s.hostPort))
return http.ListenAndServe(s.hostPort, mux)
}
func (s *Server) createServeMux() http.Handler {
mux := tracing.NewServeMux(s.tracer)
mux.Handle("/customer", http.HandlerFunc(s.customer))
return mux
}
func (s *Server) customer(w http.ResponseWriter, r *http.Request) {
ctx := r.Context()
s.logger.For(ctx).Info("HTTP request received", zap.String("method", r.Method), zap.Stringer("url", r.URL))
if err := r.ParseForm(); httperr.HandleError(w, err, http.StatusBadRequest) {
s.logger.For(ctx).Error("bad request", zap.Error(err))
return
}
customerID := r.Form.Get("customer")
if customerID == "" {
http.Error(w, "Missing required 'customer' parameter", http.StatusBadRequest)
return
}
response, err := s.database.Get(ctx, customerID)
if httperr.HandleError(w, err, http.StatusInternalServerError) {
s.logger.For(ctx).Error("request failed", zap.Error(err))
return
}
data, err := json.Marshal(response)
if httperr.HandleError(w, err, http.StatusInternalServerError) {
s.logger.For(ctx).Error("cannot marshal response", zap.Error(err))
return
}
w.Header().Set("Content-Type", "application/json")
w.Write(data)
}