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package grpc
import (
"context"
"sync"
"github.com/spiral/errors"
"github.com/spiral/roadrunner/v2/pkg/events"
"github.com/spiral/roadrunner/v2/pkg/pool"
"github.com/spiral/roadrunner/v2/pkg/state/process"
"github.com/spiral/roadrunner/v2/plugins/config"
"github.com/spiral/roadrunner/v2/plugins/grpc/codec"
"github.com/spiral/roadrunner/v2/plugins/logger"
"github.com/spiral/roadrunner/v2/plugins/server"
"github.com/spiral/roadrunner/v2/utils"
"google.golang.org/grpc"
"google.golang.org/grpc/encoding"
)
const (
name string = "grpc"
RrGrpc string = "RR_GRPC"
)
type Plugin struct {
mu *sync.RWMutex
config *Config
gPool pool.Pool
opts []grpc.ServerOption
services []func(server *grpc.Server)
server *grpc.Server
rrServer server.Server
// events handler
events events.Handler
log logger.Logger
}
func (p *Plugin) Init(cfg config.Configurer, log logger.Logger, server server.Server) error {
const op = errors.Op("grpc_plugin_init")
if !cfg.Has(name) {
return errors.E(errors.Disabled)
}
// register the codec
encoding.RegisterCodec(&codec.Codec{})
err := cfg.UnmarshalKey(name, &p.config)
if err != nil {
return errors.E(op, err)
}
err = p.config.InitDefaults()
if err != nil {
return errors.E(op, err)
}
p.opts = make([]grpc.ServerOption, 0)
p.services = make([]func(server *grpc.Server), 0)
p.events = events.NewEventsHandler()
p.events.AddListener(p.collectGRPCEvents)
p.rrServer = server
// worker's GRPC mode
if p.config.Env == nil {
p.config.Env = make(map[string]string)
}
p.config.Env[RrGrpc] = "true"
p.log = log
p.mu = &sync.RWMutex{}
return nil
}
func (p *Plugin) Serve() chan error {
const op = errors.Op("grpc_plugin_serve")
errCh := make(chan error, 1)
var err error
p.gPool, err = p.rrServer.NewWorkerPool(context.Background(), &pool.Config{
Debug: p.config.GrpcPool.Debug,
NumWorkers: p.config.GrpcPool.NumWorkers,
MaxJobs: p.config.GrpcPool.MaxJobs,
AllocateTimeout: p.config.GrpcPool.AllocateTimeout,
DestroyTimeout: p.config.GrpcPool.DestroyTimeout,
Supervisor: p.config.GrpcPool.Supervisor,
}, p.config.Env, p.collectGRPCEvents)
if err != nil {
errCh <- errors.E(op, err)
return errCh
}
go func() {
var err error
p.mu.Lock()
p.server, err = p.createGRPCserver()
if err != nil {
p.log.Error("create grpc server", "error", err)
errCh <- errors.E(op, err)
return
}
l, err := utils.CreateListener(p.config.Listen)
if err != nil {
p.log.Error("create grpc listener", "error", err)
errCh <- errors.E(op, err)
}
// protect serve
p.mu.Unlock()
err = p.server.Serve(l)
if err != nil {
// skip errors when stopping the server
if err == grpc.ErrServerStopped {
return
}
p.log.Error("grpc server stopped", "error", err)
errCh <- errors.E(op, err)
return
}
}()
return errCh
}
func (p *Plugin) Stop() error {
p.mu.Lock()
defer p.mu.Unlock()
if p.server != nil {
p.server.Stop()
}
return nil
}
func (p *Plugin) Available() {}
func (p *Plugin) Name() string {
return name
}
func (p *Plugin) Reset() error {
p.mu.Lock()
defer p.mu.Unlock()
const op = errors.Op("grpc_plugin_reset")
// destroy old pool
p.gPool.Destroy(context.Background())
var err error
p.gPool, err = p.rrServer.NewWorkerPool(context.Background(), &pool.Config{
Debug: p.config.GrpcPool.Debug,
NumWorkers: p.config.GrpcPool.NumWorkers,
MaxJobs: p.config.GrpcPool.MaxJobs,
AllocateTimeout: p.config.GrpcPool.AllocateTimeout,
DestroyTimeout: p.config.GrpcPool.DestroyTimeout,
Supervisor: p.config.GrpcPool.Supervisor,
}, p.config.Env, p.collectGRPCEvents)
if err != nil {
return errors.E(op, err)
}
return nil
}
func (p *Plugin) Workers() []*process.State {
p.mu.RLock()
defer p.mu.RUnlock()
workers := p.gPool.Workers()
ps := make([]*process.State, 0, len(workers))
for i := 0; i < len(workers); i++ {
state, err := process.WorkerProcessState(workers[i])
if err != nil {
return nil
}
ps = append(ps, state)
}
return ps
}
func (p *Plugin) collectGRPCEvents(event interface{}) {
if gev, ok := event.(events.GRPCEvent); ok {
switch gev.Event {
case events.EventUnaryCallOk:
p.log.Info("method called", "method", gev.Info.FullMethod, "started", gev.Start, "elapsed", gev.Elapsed)
case events.EventUnaryCallErr:
p.log.Info("method call finished with error", "error", gev.Error, "method", gev.Info.FullMethod, "started", gev.Start, "elapsed", gev.Elapsed)
}
}
}
|
