diff --git a/events/pub.go b/events/pub.go index 8501573..0c0783e 100644 --- a/events/pub.go +++ b/events/pub.go @@ -3,8 +3,10 @@ package events const Pub = "pub" type PubEvent struct { - Kind string `json:"kind"` - Message string `json:"message"` - Topic string `json:"topic"` - QoS int `json:"qos"` + Kind string `json:"kind"` + PacketId string `json:"packet_id"` + Message string `json:"message"` + Topic string `json:"topic"` + QoS int `json:"qos"` + Retain bool `json:"retain"` } diff --git a/go.mod b/go.mod index df8b691..a6faffc 100644 --- a/go.mod +++ b/go.mod @@ -3,9 +3,27 @@ module github.com/c16a/microq go 1.22.2 require ( + github.com/dgraph-io/badger/v4 v4.2.0 github.com/google/uuid v1.6.0 github.com/gorilla/websocket v1.5.1 github.com/valyala/fastjson v1.6.4 ) -require golang.org/x/net v0.17.0 // indirect +require ( + github.com/cespare/xxhash/v2 v2.2.0 // indirect + github.com/dgraph-io/ristretto v0.1.1 // indirect + github.com/dustin/go-humanize v1.0.0 // indirect + github.com/gogo/protobuf v1.3.2 // indirect + github.com/golang/glog v1.0.0 // indirect + github.com/golang/groupcache v0.0.0-20190702054246-869f871628b6 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/golang/snappy v0.0.3 // indirect + github.com/google/flatbuffers v1.12.1 // indirect + github.com/klauspost/compress v1.12.3 // indirect + github.com/pkg/errors v0.9.1 // indirect + github.com/stretchr/testify v1.8.1 // indirect + go.opencensus.io v0.22.5 // indirect + golang.org/x/net v0.17.0 // indirect + golang.org/x/sys v0.13.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect +) diff --git a/go.sum b/go.sum index b98371a..bc87af1 100644 --- a/go.sum +++ b/go.sum @@ -1,8 +1,127 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/cespare/xxhash/v2 v2.1.1/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs= 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+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= +honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4= diff --git a/handlers/base.go b/handlers/base.go index 7e7273f..1370bac 100644 --- a/handlers/base.go +++ b/handlers/base.go @@ -3,13 +3,14 @@ package handlers import ( "github.com/c16a/microq/broker" "github.com/c16a/microq/events" + "github.com/c16a/microq/storage" ) -func HandleMessage(client *broker.ConnectedClient, broker *broker.Broker, message []byte) error { +func HandleMessage(client *broker.ConnectedClient, broker *broker.Broker, sp storage.Provider, message []byte) error { kind := events.GetKindFromJson(message) switch kind { case events.Pub: - return handlePublish(message, client, broker) + return handlePublish(message, client, broker, sp) case events.PubRel: return handlePubrel(message, client) case events.Sub: diff --git a/handlers/pub.go b/handlers/pub.go index ef044cc..875aa7d 100644 --- a/handlers/pub.go +++ b/handlers/pub.go @@ -4,29 +4,40 @@ import ( "encoding/json" "github.com/c16a/microq/broker" "github.com/c16a/microq/events" + "github.com/c16a/microq/storage" "github.com/google/uuid" ) -func handlePublish(message []byte, client *broker.ConnectedClient, broker *broker.Broker) error { +func handlePublish(message []byte, client *broker.ConnectedClient, broker *broker.Broker, sp storage.Provider) error { var event events.PubEvent err := json.Unmarshal(message, &event) if err != nil { return err } - if event.QoS == 1 { + event.PacketId = uuid.New().String() + + if event.Retain { + if err := sp.SaveMessage(&event); err != nil { + return err + } + } + go broker.Broadcast(event) + + switch event.QoS { + case 1: pubAckEvent := &events.PubAckEvent{ Kind: events.PubAck, - PacketId: uuid.NewString(), + PacketId: event.PacketId, } client.WriteInterface(pubAckEvent) - } - if event.QoS == 2 { + break + case 2: pubRecEvent := &events.PubRecEvent{ Kind: events.PubRec, - PacketId: uuid.NewString(), + PacketId: event.PacketId, } client.WriteInterface(pubRecEvent) + break } - go broker.Broadcast(event) return nil } diff --git a/main.go b/main.go index a9daa47..fd4cf61 100644 --- a/main.go +++ b/main.go @@ -3,20 +3,24 @@ package main import ( "github.com/c16a/microq/broker" "github.com/c16a/microq/handlers" + "github.com/c16a/microq/storage" "github.com/gorilla/websocket" "log" "net/http" ) func main() { + var storageProvider = storage.NewBadgerProvider() + defer storageProvider.Close() + b := broker.NewBroker() var upgrader = websocket.Upgrader{} - http.HandleFunc("/echo", echo(upgrader, b)) + http.HandleFunc("/echo", echo(upgrader, b, storageProvider)) log.Fatal(http.ListenAndServe(":8080", nil)) } -func echo(upgrader websocket.Upgrader, b *broker.Broker) func(http.ResponseWriter, *http.Request) { +func echo(upgrader websocket.Upgrader, b *broker.Broker, sp storage.Provider) func(http.ResponseWriter, *http.Request) { return func(writer http.ResponseWriter, request *http.Request) { c, err := upgrader.Upgrade(writer, request, nil) if err != nil { @@ -38,7 +42,7 @@ func echo(upgrader websocket.Upgrader, b *broker.Broker) func(http.ResponseWrite continue } } - err = handlers.HandleMessage(client, b, message) + err = handlers.HandleMessage(client, b, sp, message) if err != nil { continue } diff --git a/storage/badger_provider.go b/storage/badger_provider.go new file mode 100644 index 0000000..cd8819d --- /dev/null +++ b/storage/badger_provider.go @@ -0,0 +1,49 @@ +package storage + +import ( + "bytes" + "encoding/gob" + "fmt" + "github.com/c16a/microq/events" + "github.com/dgraph-io/badger/v4" + "github.com/dgraph-io/badger/v4/options" + "log" +) + +type BadgerProvider struct { + db *badger.DB +} + +func NewBadgerProvider() *BadgerProvider { + var opts badger.Options + opts = badger.DefaultOptions("/tmp/badger") + opts.Compression = options.ZSTD + opts.NumVersionsToKeep = 0 + opts.CompactL0OnClose = true + opts.InMemory = false + + db, err := badger.Open(opts) + if err != nil { + log.Fatal(err) + } + return &BadgerProvider{db: db} +} + +func (b *BadgerProvider) SaveMessage(event *events.PubEvent) error { + buf := new(bytes.Buffer) + encoder := gob.NewEncoder(buf) + err := encoder.Encode(event) + if err != nil { + return err + } + + storageKey := fmt.Sprintf("%s:%s", event.Topic, event.PacketId) + return b.db.Update(func(txn *badger.Txn) error { + entry := badger.NewEntry([]byte(storageKey), buf.Bytes()) + return txn.SetEntry(entry) + }) +} + +func (b *BadgerProvider) Close() error { + return b.db.Close() +} diff --git a/storage/provider.go b/storage/provider.go new file mode 100644 index 0000000..0e254ff --- /dev/null +++ b/storage/provider.go @@ -0,0 +1,8 @@ +package storage + +import "github.com/c16a/microq/events" + +type Provider interface { + SaveMessage(event *events.PubEvent) error + Close() error +}