forked from lunny/levelqueue
A golang queue library base on go-leveldb
Improve documentation Separate out set, uniquequeue and queue Add Has Move to use unique queue Add SIsMember Update README Add redis-like set commands |
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.circleci | ||
.drone.yml | ||
.gitignore | ||
error.go | ||
go.mod | ||
go.sum | ||
LICENSE | ||
queue_test.go | ||
queue.go | ||
README.md | ||
set_test.go | ||
set.go | ||
uniquequeue_test.go | ||
uniquequeue.go |
levelqueue
Level queue is a simple queue golang library base on go-leveldb.
Installation
go get gitea.com/lunny/levelqueue
Usage
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.