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service.go
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service.go
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/*
* MIT License
*
* Copyright (c) 2022-2024 Tochemey
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package service
import (
"context"
"fmt"
"net/http"
"time"
"connectrpc.com/connect"
"connectrpc.com/otelconnect"
"github.com/pkg/errors"
"golang.org/x/net/http2"
"golang.org/x/net/http2/h2c"
"google.golang.org/protobuf/proto"
"github.com/tochemey/goakt/actors"
kactors "github.com/tochemey/goakt/examples/actor-cluster/dnssd/actors"
samplepb "github.com/tochemey/goakt/examples/protos/samplepb"
"github.com/tochemey/goakt/examples/protos/samplepb/samplepbconnect"
"github.com/tochemey/goakt/log"
)
type AccountService struct {
actorSystem actors.ActorSystem
logger log.Logger
port int
server *http.Server
}
var _ samplepbconnect.AccountServiceHandler = &AccountService{}
// NewAccountService creates an instance of AccountService
func NewAccountService(system actors.ActorSystem, logger log.Logger, port int) *AccountService {
return &AccountService{
actorSystem: system,
logger: logger,
port: port,
}
}
// CreateAccount helps create an account
func (s *AccountService) CreateAccount(ctx context.Context, c *connect.Request[samplepb.CreateAccountRequest]) (*connect.Response[samplepb.CreateAccountResponse], error) {
// grab the actual request
req := c.Msg
// grab the account id
accountID := req.GetCreateAccount().GetAccountId()
// create the pid and send the command create account
accountEntity := kactors.NewAccountEntity(req.GetCreateAccount().GetAccountId())
// create the given pid
pid, err := s.actorSystem.Spawn(ctx, accountID, accountEntity)
if err != nil {
return nil, err
}
// send the create command to the pid
reply, err := actors.Ask(ctx, pid, &samplepb.CreateAccount{
AccountId: accountID,
AccountBalance: req.GetCreateAccount().GetAccountBalance(),
}, time.Second)
// handle the error
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
// pattern match on the reply
switch x := reply.(type) {
case *samplepb.Account:
// return the appropriate response
return connect.NewResponse(&samplepb.CreateAccountResponse{Account: x}), nil
default:
// create the error message to send
err := fmt.Errorf("invalid reply=%s", reply.ProtoReflect().Descriptor().FullName())
return nil, connect.NewError(connect.CodeInternal, err)
}
}
// CreditAccount helps credit a given account
func (s *AccountService) CreditAccount(ctx context.Context, c *connect.Request[samplepb.CreditAccountRequest]) (*connect.Response[samplepb.CreditAccountResponse], error) {
req := c.Msg
accountID := req.GetCreditAccount().GetAccountId()
addr, pid, err := s.actorSystem.ActorOf(ctx, accountID)
if err != nil {
// check whether it is not found error
if !errors.Is(err, actors.ErrActorNotFound(accountID)) {
return nil, connect.NewError(connect.CodeNotFound, err)
}
// return not found
return nil, connect.NewError(connect.CodeNotFound, err)
}
var message proto.Message
command := &samplepb.CreditAccount{
AccountId: accountID,
Balance: req.GetCreditAccount().GetBalance(),
}
if pid != nil {
s.logger.Info("actor is found locally...")
message, err = actors.Ask(ctx, pid, command, time.Second)
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
}
if pid == nil {
s.logger.Info("actor is not found locally...")
reply, err := actors.RemoteAsk(ctx, addr, command)
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
message, _ = reply.UnmarshalNew()
}
switch x := message.(type) {
case *samplepb.Account:
return connect.NewResponse(&samplepb.CreditAccountResponse{Account: x}), nil
default:
err := fmt.Errorf("invalid reply=%s", message.ProtoReflect().Descriptor().FullName())
return nil, connect.NewError(connect.CodeInternal, err)
}
}
// GetAccount helps get an account
func (s *AccountService) GetAccount(ctx context.Context, c *connect.Request[samplepb.GetAccountRequest]) (*connect.Response[samplepb.GetAccountResponse], error) {
// grab the actual request
req := c.Msg
// grab the account id
accountID := req.GetAccountId()
// locate the given actor
addr, pid, err := s.actorSystem.ActorOf(ctx, accountID)
// handle the error
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
var message proto.Message
command := &samplepb.GetAccount{
AccountId: accountID,
}
if pid != nil {
s.logger.Info("actor is found locally...")
message, err = actors.Ask(ctx, pid, command, time.Second)
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
}
if pid == nil {
s.logger.Info("actor is not found locally...")
reply, err := actors.RemoteAsk(ctx, addr, command)
if err != nil {
return nil, connect.NewError(connect.CodeInternal, err)
}
message, _ = reply.UnmarshalNew()
}
// pattern match on the reply
switch x := message.(type) {
case *samplepb.Account:
return connect.NewResponse(&samplepb.GetAccountResponse{Account: x}), nil
default:
err := fmt.Errorf("invalid reply=%s", message.ProtoReflect().Descriptor().FullName())
return nil, connect.NewError(connect.CodeInternal, err)
}
}
// Start starts the service
func (s *AccountService) Start() {
go func() {
s.listenAndServe()
}()
}
// Stop stops the service
func (s *AccountService) Stop(ctx context.Context) error {
return s.server.Shutdown(ctx)
}
// listenAndServe starts the http server
func (s *AccountService) listenAndServe() {
// create a http service mux
mux := http.NewServeMux()
// create an interceptor
interceptor, err := otelconnect.NewInterceptor()
if err != nil {
s.logger.Panic(err)
}
// create the resource and handler
path, handler := samplepbconnect.NewAccountServiceHandler(s,
connect.WithInterceptors(interceptor))
mux.Handle(path, handler)
// create the address
serverAddr := fmt.Sprintf(":%d", s.port)
// create a http server instance
server := &http.Server{
Addr: serverAddr,
ReadTimeout: 3 * time.Second,
ReadHeaderTimeout: time.Second,
WriteTimeout: time.Second,
IdleTimeout: 1200 * time.Second,
Handler: h2c.NewHandler(mux, &http2.Server{
IdleTimeout: 1200 * time.Second,
}),
}
// set the server
s.server = server
// listen and service requests
if err := s.server.ListenAndServe(); err != nil {
if errors.Is(err, http.ErrServerClosed) {
return
}
s.logger.Panic(errors.Wrap(err, "failed to start remoting service"))
}
}