/
main.go
208 lines (172 loc) · 6.77 KB
/
main.go
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// Copyright (c) Abstract Machines
// SPDX-License-Identifier: Apache-2.0
// Package main contains opcua-adapter main function to start the opcua-adapter service.
package main
import (
"context"
"fmt"
"log"
"log/slog"
"net/url"
"os"
chclient "github.com/absmach/callhome/pkg/client"
"github.com/absmach/magistrala"
"github.com/absmach/magistrala/internal"
jaegerclient "github.com/absmach/magistrala/internal/clients/jaeger"
redisclient "github.com/absmach/magistrala/internal/clients/redis"
"github.com/absmach/magistrala/internal/server"
httpserver "github.com/absmach/magistrala/internal/server/http"
mglog "github.com/absmach/magistrala/logger"
"github.com/absmach/magistrala/opcua"
"github.com/absmach/magistrala/opcua/api"
"github.com/absmach/magistrala/opcua/db"
"github.com/absmach/magistrala/opcua/events"
"github.com/absmach/magistrala/opcua/gopcua"
"github.com/absmach/magistrala/pkg/events/store"
"github.com/absmach/magistrala/pkg/messaging/brokers"
brokerstracing "github.com/absmach/magistrala/pkg/messaging/brokers/tracing"
"github.com/absmach/magistrala/pkg/uuid"
"github.com/caarlos0/env/v10"
"github.com/go-redis/redis/v8"
"golang.org/x/sync/errgroup"
)
const (
svcName = "opc-ua-adapter"
envPrefixHTTP = "MG_OPCUA_ADAPTER_HTTP_"
defSvcHTTPPort = "8180"
thingsRMPrefix = "thing"
channelsRMPrefix = "channel"
connectionRMPrefix = "connection"
thingsStream = "magistrala.things"
)
type config struct {
LogLevel string `env:"MG_OPCUA_ADAPTER_LOG_LEVEL" envDefault:"info"`
ESConsumerName string `env:"MG_OPCUA_ADAPTER_EVENT_CONSUMER" envDefault:"opcua-adapter"`
BrokerURL string `env:"MG_MESSAGE_BROKER_URL" envDefault:"nats://localhost:4222"`
JaegerURL url.URL `env:"MG_JAEGER_URL" envDefault:"http://localhost:14268/api/traces"`
SendTelemetry bool `env:"MG_SEND_TELEMETRY" envDefault:"true"`
InstanceID string `env:"MG_OPCUA_ADAPTER_INSTANCE_ID" envDefault:""`
ESURL string `env:"MG_ES_URL" envDefault:"nats://localhost:4222"`
RouteMapURL string `env:"MG_OPCUA_ADAPTER_ROUTE_MAP_URL" envDefault:"redis://localhost:6379/0"`
TraceRatio float64 `env:"MG_JAEGER_TRACE_RATIO" envDefault:"1.0"`
}
func main() {
ctx, httpCancel := context.WithCancel(context.Background())
g, ctx := errgroup.WithContext(ctx)
cfg := config{}
if err := env.Parse(&cfg); err != nil {
log.Fatalf("failed to load %s configuration : %s", svcName, err)
}
opcConfig := opcua.Config{}
if err := env.Parse(&opcConfig); err != nil {
log.Fatalf("failed to load %s opcua client configuration : %s", svcName, err)
}
logger, err := mglog.New(os.Stdout, cfg.LogLevel)
if err != nil {
log.Fatalf("failed to init logger: %s", err.Error())
}
var exitCode int
defer mglog.ExitWithError(&exitCode)
if cfg.InstanceID == "" {
if cfg.InstanceID, err = uuid.New().ID(); err != nil {
logger.Error(fmt.Sprintf("failed to generate instanceID: %s", err))
exitCode = 1
return
}
}
httpServerConfig := server.Config{Port: defSvcHTTPPort}
if err := env.ParseWithOptions(&httpServerConfig, env.Options{Prefix: envPrefixHTTP}); err != nil {
logger.Error(fmt.Sprintf("failed to load %s HTTP server configuration : %s", svcName, err))
exitCode = 1
return
}
rmConn, err := redisclient.Connect(cfg.RouteMapURL)
if err != nil {
logger.Error(fmt.Sprintf("failed to setup %s bootstrap event store redis client : %s", svcName, err))
exitCode = 1
return
}
defer rmConn.Close()
thingRM := newRouteMapRepositoy(rmConn, thingsRMPrefix, logger)
chanRM := newRouteMapRepositoy(rmConn, channelsRMPrefix, logger)
connRM := newRouteMapRepositoy(rmConn, connectionRMPrefix, logger)
tp, err := jaegerclient.NewProvider(ctx, svcName, cfg.JaegerURL, cfg.InstanceID, cfg.TraceRatio)
if err != nil {
logger.Error(fmt.Sprintf("Failed to init Jaeger: %s", err))
exitCode = 1
return
}
defer func() {
if err := tp.Shutdown(ctx); err != nil {
logger.Error(fmt.Sprintf("Error shutting down tracer provider: %v", err))
}
}()
tracer := tp.Tracer(svcName)
pubSub, err := brokers.NewPubSub(ctx, cfg.BrokerURL, logger)
if err != nil {
logger.Error(fmt.Sprintf("failed to connect to message broker: %s", err))
exitCode = 1
return
}
defer pubSub.Close()
pubSub = brokerstracing.NewPubSub(httpServerConfig, tracer, pubSub)
sub := gopcua.NewSubscriber(ctx, pubSub, thingRM, chanRM, connRM, logger)
browser := gopcua.NewBrowser(ctx, logger)
svc := newService(sub, browser, thingRM, chanRM, connRM, opcConfig, logger)
go subscribeToStoredSubs(ctx, sub, opcConfig, logger)
if err = subscribeToThingsES(ctx, svc, cfg, logger); err != nil {
logger.Error(fmt.Sprintf("failed to subscribe to things event store: %s", err))
exitCode = 1
return
}
hs := httpserver.New(ctx, httpCancel, svcName, httpServerConfig, api.MakeHandler(svc, logger, cfg.InstanceID), logger)
if cfg.SendTelemetry {
chc := chclient.New(svcName, magistrala.Version, logger, httpCancel)
go chc.CallHome(ctx)
}
g.Go(func() error {
return hs.Start()
})
g.Go(func() error {
return server.StopSignalHandler(ctx, httpCancel, logger, svcName, hs)
})
if err := g.Wait(); err != nil {
logger.Error(fmt.Sprintf("OPC-UA adapter service terminated: %s", err))
}
}
func subscribeToStoredSubs(ctx context.Context, sub opcua.Subscriber, cfg opcua.Config, logger *slog.Logger) {
// Get all stored subscriptions
nodes, err := db.ReadAll()
if err != nil {
logger.Warn(fmt.Sprintf("Read stored subscriptions failed: %s", err))
}
for _, n := range nodes {
cfg.ServerURI = n.ServerURI
cfg.NodeID = n.NodeID
go func() {
if err := sub.Subscribe(ctx, cfg); err != nil {
logger.Warn(fmt.Sprintf("Subscription failed: %s", err))
}
}()
}
}
func subscribeToThingsES(ctx context.Context, svc opcua.Service, cfg config, logger *slog.Logger) error {
subscriber, err := store.NewSubscriber(ctx, cfg.ESURL, thingsStream, cfg.ESConsumerName, logger)
if err != nil {
return err
}
handler := events.NewEventHandler(svc)
logger.Info("Subscribed to Redis Event Store")
return subscriber.Subscribe(ctx, handler)
}
func newRouteMapRepositoy(client *redis.Client, prefix string, logger *slog.Logger) opcua.RouteMapRepository {
logger.Info(fmt.Sprintf("Connected to %s Redis Route-map", prefix))
return events.NewRouteMapRepository(client, prefix)
}
func newService(sub opcua.Subscriber, browser opcua.Browser, thingRM, chanRM, connRM opcua.RouteMapRepository, opcuaConfig opcua.Config, logger *slog.Logger) opcua.Service {
svc := opcua.New(sub, browser, thingRM, chanRM, connRM, opcuaConfig, logger)
svc = api.LoggingMiddleware(svc, logger)
counter, latency := internal.MakeMetrics("opc_ua_adapter", "api")
svc = api.MetricsMiddleware(svc, counter, latency)
return svc
}