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* 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 main

import (

"context"

"fmt"

"github.com/caarlos0/env"

pubsub "github.com/devtron-labs/common-lib/pubsub-lib"

"github.com/devtron-labs/git-sensor/api"

"github.com/devtron-labs/git-sensor/bean"

"github.com/devtron-labs/git-sensor/internal/middleware"

"github.com/devtron-labs/git-sensor/pkg/git"

pb "github.com/devtron-labs/protos/gitSensor"

"github.com/go-pg/pg"

"github.com/gorilla/handlers"

grpc_prometheus "github.com/grpc-ecosystem/go-grpc-prometheus"

"go.uber.org/zap"

"google.golang.org/grpc"

"google.golang.org/grpc/keepalive"

"log"

"net"

"net/http"

"os"

"time"

)

type App struct {

MuxRouter *api.MuxRouter

Logger *zap.SugaredLogger

watcher *git.GitWatcherImpl

restServer *http.Server

grpcServer *grpc.Server

db *pg.DB

pubSubClient *pubsub.PubSubClientServiceImpl

GrpcControllerImpl *api.GrpcHandlerImpl

StartupConfig *bean.StartupConfig

}

func NewApp(MuxRouter *api.MuxRouter, Logger *zap.SugaredLogger, impl *git.GitWatcherImpl, db *pg.DB, pubSubClient *pubsub.PubSubClientServiceImpl, GrpcControllerImpl *api.GrpcHandlerImpl) *App {

return &App{

MuxRouter: MuxRouter,

Logger: Logger,

watcher: impl,

db: db,

pubSubClient: pubSubClient,

GrpcControllerImpl: GrpcControllerImpl,

}

type PanicLogger struct {

Logger *zap.SugaredLogger

}

func (impl *PanicLogger) Println(param ...interface{}) {

impl.Logger.Errorw("PANIC", "err", param)

middleware.PanicCounter.WithLabelValues().Inc()

}

func (app *App) Start() {

// Parse config

app.StartupConfig = &bean.StartupConfig{}

err := env.Parse(app.StartupConfig)

if err != nil {

app.Logger.Errorw("failed to parse configuration")

os.Exit(2)

}

go func() {

// Start REST server

err = app.initRestServer(app.StartupConfig.RestPort)

if err != nil {

app.Logger.Errorw("error starting rest server", "err", err)

os.Exit(2)

}

}()

// Start gRPC server

err = app.initGrpcServer(app.StartupConfig.GrpcPort)

if err != nil {

app.Logger.Errorw("error starting grpc server", "err", err)

os.Exit(2)

}

func (app *App) initRestServer(port int) error {

app.Logger.Infow("rest server starting", "port", app.StartupConfig.RestPort)

app.MuxRouter.Init()

//authEnforcer := casbin2.Create()

h := handlers.RecoveryHandler(handlers.RecoveryLogger(&PanicLogger{Logger: app.Logger}))(app.MuxRouter.Router)

app.restServer = &http.Server{Addr: fmt.Sprintf(":%d", port), Handler: h}

app.MuxRouter.Router.Use(middleware.PrometheusMiddleware)

return app.restServer.ListenAndServe()

}

func (app *App) initGrpcServer(port int) error {

app.Logger.Infow("gRPC server starting", "port", app.StartupConfig.GrpcPort)

//listen on the port

lis, err := net.Listen("tcp", fmt.Sprintf(":%d", port))

if err != nil {

log.Fatalf("failed to start grpcServer %v", err)

return err

}

opts := []grpc.ServerOption{

grpc.KeepaliveParams(keepalive.ServerParameters{

MaxConnectionAge: 10 * time.Second,

}),

grpc.StreamInterceptor(grpc_prometheus.StreamServerInterceptor),

grpc.UnaryInterceptor(grpc_prometheus.UnaryServerInterceptor),

}

// create a new gRPC grpcServer

app.grpcServer = grpc.NewServer(opts...)

// register GitSensor service

pb.RegisterGitSensorServiceServer(app.grpcServer, app.GrpcControllerImpl)

grpc_prometheus.Register(app.grpcServer)

grpc_prometheus.EnableHandlingTimeHistogram()

// start listening on address

if err = app.grpcServer.Serve(lis); err != nil {

log.Fatalf("failed to start: %v", err)

return err

}

return nil

}

// Stop stops the grpcServer and cleans resources. Called during shutdown

func (app *App) Stop() {

app.Logger.Infow("orchestrator shutdown initiating")

app.Logger.Infow("stopping cron")

app.watcher.StopCron()

app.Logger.Infow("gracefully stopping GitSensor")

app.grpcServer.GracefulStop()

timeoutContext, _ := context.WithTimeout(context.Background(), 5*time.Second)

app.Logger.Infow("closing router")

err := app.restServer.Shutdown(timeoutContext)

if err != nil {

app.Logger.Errorw("error in mux router shutdown", "err", err)

}

app.Logger.Infow("closing db connection")

err = app.db.Close()

if err != nil {

app.Logger.Errorw("error in closing db connection", "err", err)

}

app.Logger.Infow("housekeeping done. exiting now")

}

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