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server.go
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server.go
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//
// Copyright 2019 Insolar Technologies GmbH
//
// 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 light
import (
"context"
"fmt"
"os"
"os/signal"
"syscall"
"github.com/insolar/insolar/configuration"
"github.com/insolar/insolar/insolar/utils"
"github.com/insolar/insolar/instrumentation/inslogger"
"github.com/insolar/insolar/log"
"github.com/insolar/insolar/server/internal"
"github.com/insolar/insolar/version"
)
type Server struct {
cfgPath string
}
func New(cfgPath string) *Server {
return &Server{
cfgPath: cfgPath,
}
}
func (s *Server) Serve() {
cfgHolder := configuration.NewHolder()
var err error
if len(s.cfgPath) != 0 {
err = cfgHolder.LoadFromFile(s.cfgPath)
} else {
err = cfgHolder.Load()
}
if err != nil {
log.Warn("failed to load configuration from file: ", err.Error())
}
cfg := &cfgHolder.Configuration
fmt.Println("Version: ", version.GetFullVersion())
fmt.Println("Starts with configuration:\n", configuration.ToString(cfgHolder.Configuration))
ctx := context.Background()
traceID := "main_" + utils.RandTraceID()
ctx, inslog := inslogger.InitNodeLogger(ctx, cfg.Log, traceID, "", "")
log.InitTicker(inslog)
cmp, err := newComponents(ctx, *cfg)
fatal(ctx, err, "failed to create components")
if cfg.Tracer.Jaeger.AgentEndpoint != "" {
var jaegerFlush func()
ctx, jaegerFlush = internal.Jaeger(ctx, cfg.Tracer.Jaeger, traceID, cmp.NodeRef, cmp.NodeRole)
defer jaegerFlush()
}
var gracefulStop = make(chan os.Signal, 1)
signal.Notify(gracefulStop, syscall.SIGTERM)
signal.Notify(gracefulStop, syscall.SIGINT)
var waitChannel = make(chan bool)
go func() {
sig := <-gracefulStop
inslog.Debug("caught sig: ", sig)
inslog.Warn("GRACEFUL STOP APP")
err = cmp.Stop(ctx)
fatal(ctx, err, "failed to graceful stop components")
close(waitChannel)
}()
err = cmp.Start(ctx)
fatal(ctx, err, "failed to start components")
fmt.Println("All components were started")
<-waitChannel
}
func fatal(ctx context.Context, err error, message string) {
if err == nil {
return
}
inslogger.FromContext(ctx).Fatalf("%v: %v", message, err.Error())
}