/
server.go
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/
server.go
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// Copyright 2024 The Bucketeer Authors.
//
// Licensed 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 rest
import (
"context"
"fmt"
"net/http"
"time"
"go.uber.org/zap"
"github.com/bucketeer-io/bucketeer/pkg/metrics"
)
type Server struct {
certPath string
keyPath string
port int
metrics metrics.Registerer
httpServer *http.Server
mux *http.ServeMux
logger *zap.Logger
services []Service
}
type Option func(*Server)
const httpName = "http"
func WithLogger(logger *zap.Logger) Option {
return func(s *Server) {
s.logger = logger
}
}
func WithPort(port int) Option {
return func(s *Server) {
s.port = port
}
}
func WithMetrics(registerer metrics.Registerer) Option {
return func(s *Server) {
s.metrics = registerer
}
}
func WithService(service Service) Option {
return func(s *Server) {
s.services = append(s.services, service)
}
}
func NewServer(certPath, keyPath string, opt ...Option) *Server {
server := &Server{
port: 8000,
logger: zap.NewNop(),
mux: http.NewServeMux(),
}
for _, o := range opt {
o(server)
}
server.logger = server.logger.Named(httpName)
if len(certPath) == 0 {
server.logger.Fatal("CertPath must not be empty")
}
server.certPath = certPath
if len(keyPath) == 0 {
server.logger.Fatal("KeyPath must not be empty")
}
server.keyPath = keyPath
if len(server.services) == 0 {
server.logger.Fatal("Service must not be nil")
}
return server
}
func (s *Server) Run() {
if s.metrics != nil {
registerMetrics(s.metrics)
}
s.setup()
s.logger.Info(fmt.Sprintf("Rest server is running on %d", s.port))
s.runServer()
}
func (s *Server) Stop(timeout time.Duration) {
s.logger.Info("Rest server is going to shut down")
startTime := time.Now()
ctx, cancel := context.WithTimeout(context.Background(), timeout)
defer cancel()
err := s.httpServer.Shutdown(ctx)
if err != nil {
s.logger.Error("Rest server failed to shut down", zap.Error(err))
}
s.logger.Info("Rest server has shut down gracefully",
zap.Duration("elapsedTime", time.Since(startTime)),
)
}
func (s *Server) setup() {
mws := newMiddleWares()
mws.Append(LogServerMiddleware(s.logger))
mws.Append(MetricsServerMiddleware)
for _, service := range s.services {
service.Register(s.mux)
}
s.httpServer = &http.Server{
Addr: fmt.Sprintf(":%d", s.port),
Handler: mws.Handle(s.mux),
}
}
func (s *Server) runServer() {
err := s.httpServer.ListenAndServeTLS(s.certPath, s.keyPath)
if err != nil && err != http.ErrServerClosed {
s.logger.Fatal("Failed to serve", zap.Error(err))
}
}