/
service.go
219 lines (181 loc) · 5.69 KB
/
service.go
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package worker
import (
"context"
"github.com/google/uuid"
"github.com/grpc-ecosystem/grpc-gateway/v2/runtime"
"golang.org/x/sync/errgroup"
"google.golang.org/grpc"
"github.com/razorpay/metro/internal/brokerstore"
"github.com/razorpay/metro/internal/health"
"github.com/razorpay/metro/internal/node"
"github.com/razorpay/metro/internal/nodebinding"
"github.com/razorpay/metro/internal/offset"
"github.com/razorpay/metro/internal/project"
"github.com/razorpay/metro/internal/scheduler"
"github.com/razorpay/metro/internal/server"
"github.com/razorpay/metro/internal/subscriber"
"github.com/razorpay/metro/internal/subscription"
"github.com/razorpay/metro/internal/tasks"
"github.com/razorpay/metro/internal/topic"
"github.com/razorpay/metro/pkg/cache"
"github.com/razorpay/metro/pkg/logger"
"github.com/razorpay/metro/pkg/messagebroker"
"github.com/razorpay/metro/pkg/registry"
metrov1 "github.com/razorpay/metro/rpc/proto/v1"
)
// Service for worker
type Service struct {
id string
workerConfig *Config
leaderTask tasks.ITask
subscriptionTask tasks.ITask
doneCh chan struct{}
registry registry.IRegistry
cache cache.ICache
brokerStore brokerstore.IBrokerStore
}
// GetErrorChannel returns service error channel
func (svc *Service) GetErrorChannel() chan error {
return nil
}
// NewService creates an instance of new worker
func NewService(workerConfig *Config, registryConfig *registry.Config, cacheConfig *cache.Config) (*Service, error) {
workerID := uuid.New().String()
// Init registry
reg, err := registry.NewRegistry(registryConfig)
if err != nil {
return nil, err
}
ch, err := cache.NewCache(cacheConfig)
if err != nil {
return nil, err
}
// init broker store
brokerStore, err := brokerstore.NewBrokerStore(workerConfig.Broker.Variant, &workerConfig.Broker.BrokerConfig)
if err != nil {
return nil, err
}
nodeCore := node.NewCore(node.NewRepo(reg))
projectCore := project.NewCore(project.NewRepo(reg))
topicCore := topic.NewCore(topic.NewRepo(reg), projectCore, brokerStore)
subscriptionCore := subscription.NewCore(
subscription.NewRepo(reg),
projectCore,
topicCore,
brokerStore)
nodeBindingCore := nodebinding.NewCore(nodebinding.NewRepo(reg))
offsetCore := offset.NewCore(offset.NewRepo(reg))
scheduler, err := scheduler.New(scheduler.LoadBalance)
if err != nil {
return nil, err
}
subscriberCore := subscriber.NewCore(brokerStore, subscriptionCore, offsetCore, ch, topicCore)
// Init scheduler task, this schedules the subscriptions on nodes
// Leader Task runs this task internally if node is elected as leader
schedulerTask, err := tasks.NewSchedulerTask(
workerID,
reg,
brokerStore,
nodeCore,
topicCore,
nodeBindingCore,
subscriptionCore,
scheduler,
tasks.WithSchedulerConfig(&workerConfig.SchedulerConfig))
if err != nil {
return nil, err
}
leaderTask, err := tasks.NewLeaderTask(workerID, reg, nodeCore, schedulerTask)
if err != nil {
return nil, err
}
// Init subscription task, this runs the assigned subscriptions
subscriptionTask, err := tasks.NewSubscriptionTask(
workerID,
reg,
brokerStore,
subscriptionCore,
nodeBindingCore,
subscriberCore,
tasks.WithHTTPConfig(&workerConfig.HTTPClientConfig))
if err != nil {
return nil, err
}
return &Service{
id: workerID,
doneCh: make(chan struct{}),
workerConfig: workerConfig,
registry: reg,
cache: ch,
brokerStore: brokerStore,
leaderTask: leaderTask,
subscriptionTask: subscriptionTask,
}, nil
}
// Start implements all the tasks for worker and waits until one of the task fails
func (svc *Service) Start(ctx context.Context) error {
logger.Ctx(ctx).Infow("starting metro worker")
// close the done channel when this function returns
defer close(svc.doneCh)
// init registry health checker
registryHealthChecker := health.NewRegistryHealthChecker(svc.registry)
// init cache health checker
// cacheHealthChecker := health.NewCacheHealthChecker(svc.cache)
// init broker health checker
admin, _ := svc.brokerStore.GetAdmin(ctx, messagebroker.AdminClientOptions{})
brokerHealthChecker := health.NewBrokerHealthChecker(admin)
// register broker and registry health checkers on the health server
healthCore, err := health.NewCore(registryHealthChecker, brokerHealthChecker)
if err != nil {
return err
}
workerGroup, gctx := errgroup.WithContext(ctx)
// Run the leader task
workerGroup.Go(func() error {
err := svc.leaderTask.Run(gctx)
return err
})
// Run the subscription task
workerGroup.Go(func() error {
err := svc.subscriptionTask.Run(gctx)
return err
})
workerGroup.Go(func() error {
err := server.RunGRPCServer(
gctx,
svc.workerConfig.Interfaces.API.GrpcServerAddress,
func(server *grpc.Server) error {
metrov1.RegisterStatusCheckAPIServer(server, health.NewServer(healthCore))
return nil
},
getInterceptors()...,
)
return err
})
workerGroup.Go(func() error {
serverErr := server.RunHTTPServer(
gctx,
svc.workerConfig.Interfaces.API.HTTPServerAddress,
func(mux *runtime.ServeMux) error {
err := metrov1.RegisterStatusCheckAPIHandlerFromEndpoint(
gctx,
mux,
svc.workerConfig.Interfaces.API.GrpcServerAddress,
[]grpc.DialOption{grpc.WithInsecure()})
return err
})
return serverErr
})
workerGroup.Go(func() error {
err := server.RunInternalHTTPServer(gctx, svc.workerConfig.Interfaces.API.InternalHTTPServerAddress)
return err
})
err = workerGroup.Wait()
if err != nil {
logger.Ctx(gctx).Infof("worker service error: %s", err.Error())
}
return err
}
func getInterceptors() []grpc.UnaryServerInterceptor {
return []grpc.UnaryServerInterceptor{}
}