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* Upgrade levelqueue to version 0.2.0 This adds functionality for Unique Queues * Add UniqueQueue interface and functions to create them * Add UniqueQueue implementations * Move TestPullRequests over to use UniqueQueue * Reduce code duplication * Add bytefifos * Ensure invalid types are logged * Fix close race in PersistableChannelQueue Shutdown
1.4 KiB
Vendored
1.4 KiB
Vendored
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.