1.4 KiB


Level queue is a simple queue golang library base on go-leveldb.

Build Status


go get gitea.com/lunny/levelqueue


queue, err := levelqueue.Open("./queue")

err = queue.RPush([]byte("test"))

// pop an element from left of the queue
data, err = queue.LPop()

// if handle success, element will be pop, otherwise it will be keep
queue.LHandle(func(dt []byte) error{
    return nil

You can now create a Set from a leveldb:

set, err := levelqueue.OpenSet("./set")

added, err:= set.Add([]byte("member1"))

has, err := set.Has([]byte("member1"))

members, err := set.Members()

removed, err := set.Remove([]byte("member1"))

And you can create a UniqueQueue from a leveldb:

queue, err := levelqueue.OpenUnique("./queue")

err := queue.RPush([]byte("member1"))

err = queue.LPush([]byte("member1"))
// Will return ErrAlreadyInQueue

// and so on.

Creating Queues, UniqueQueues and Sets from already open DB

If you have an already open DB you can create these from this using the NewQueue, NewUniqueQueue and NewSet functions.