chore: init redisdb module

Signed-off-by: Bo-Yi Wu <[email protected]>

Author: appleboy

go.mod

@@ -0,0 +1,8 @@
+module github.com/golang-queue/redisdb
+
+go 1.16
+
+require (
+	github.com/go-redis/redis/v8 v8.11.3
+	github.com/golang-queue/queue v0.0.7
+)

go.sum

@@ -0,0 +1,105 @@
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redis.go

@@ -0,0 +1,184 @@
+package redisdb
+
+import (
+	"context"
+	"sync"
+	"sync/atomic"
+
+	"github.com/golang-queue/queue"
+
+	"github.com/go-redis/redis/v8"
+)
+
+var _ queue.Worker = (*Worker)(nil)
+
+// Option for queue system
+type Option func(*Worker)
+
+// Worker for Redis
+type Worker struct {
+	// redis config
+	rdb              *redis.Client
+	addr             string
+	db               int
+	connectionString string
+	password         string
+
+	startOnce sync.Once
+	stopOnce  sync.Once
+	stop      chan struct{}
+	channel   string
+	runFunc   func(context.Context, queue.QueuedMessage) error
+	logger    queue.Logger
+	stopFlag  int32
+	startFlag int32
+}
+
+// WithAddr setup the addr of NSQ
+func WithAddr(addr string) Option {
+	return func(w *Worker) {
+		w.addr = addr
+	}
+}
+
+// WithPassword redis password
+func WithDB(db int) Option {
+	return func(w *Worker) {
+		w.db = db
+	}
+}
+
+// WithPassword redis password
+func WithPassword(passwd string) Option {
+	return func(w *Worker) {
+		w.password = passwd
+	}
+}
+
+// WithPassword redis password
+func WithConnectionString(connectionString string) Option {
+	return func(w *Worker) {
+		w.connectionString = connectionString
+	}
+}
+
+// WithChannel setup the channel of NSQ
+func WithChannel(channel string) Option {
+	return func(w *Worker) {
+		w.channel = channel
+	}
+}
+
+// WithRunFunc setup the run func of queue
+func WithRunFunc(fn func(context.Context, queue.QueuedMessage) error) Option {
+	return func(w *Worker) {
+		w.runFunc = fn
+	}
+}
+
+// WithLogger set custom logger
+func WithLogger(l queue.Logger) Option {
+	return func(w *Worker) {
+		w.logger = l
+	}
+}
+
+// NewWorker for struc
+func NewWorker(opts ...Option) *Worker {
+	var err error
+	w := &Worker{
+		addr:    "127.0.0.1:6379",
+		channel: "queue",
+		stop:    make(chan struct{}),
+		logger:  queue.NewLogger(),
+		runFunc: func(context.Context, queue.QueuedMessage) error {
+			return nil
+		},
+	}
+
+	// Loop through each option
+	for _, opt := range opts {
+		// Call the option giving the instantiated
+		opt(w)
+	}
+
+	var options *redis.Options
+
+	if w.connectionString != "" {
+		options, err = redis.ParseURL(w.connectionString)
+		if err != nil {
+			w.logger.Fatal(err)
+		}
+	} else if w.addr != "" {
+		options = &redis.Options{
+			Addr:     w.addr,
+			Password: w.password,
+			DB:       w.db,
+		}
+	}
+
+	rdb := redis.NewClient(options)
+
+	_, err = rdb.Ping(context.Background()).Result()
+	if err != nil {
+		w.logger.Fatal(err)
+	}
+
+	w.rdb = rdb
+
+	return w
+}
+
+// BeforeRun run script before start worker
+func (s *Worker) BeforeRun() error {
+	return nil
+}
+
+// AfterRun run script after start worker
+func (s *Worker) AfterRun() error {
+	return nil
+}
+
+func (s *Worker) handle(job queue.Job) error {
+	return nil
+}
+
+// Shutdown worker
+func (s *Worker) Shutdown() error {
+	if !atomic.CompareAndSwapInt32(&s.stopFlag, 0, 1) {
+		return queue.ErrQueueShutdown
+	}
+
+	s.stopOnce.Do(func() {
+		if atomic.LoadInt32(&s.startFlag) == 1 {
+			s.rdb.Close()
+		}
+
+		close(s.stop)
+	})
+	return nil
+}
+
+// Capacity for channel
+func (s *Worker) Capacity() int {
+	return 0
+}
+
+// Usage for count of channel usage
+func (s *Worker) Usage() int {
+	return 0
+}
+
+// Queue send notification to queue
+func (s *Worker) Queue(job queue.QueuedMessage) error {
+	if atomic.LoadInt32(&s.stopFlag) == 1 {
+		return queue.ErrQueueShutdown
+	}
+
+	return nil
+}
+
+// Run start the worker
+func (s *Worker) Run() error {
+	return nil
+}

redis_test.go

@@ -0,0 +1 @@
+package redisdb