Description
Provide Semaphore, SizedGroup and ErrSizedGroup
Syncs alternatives and similar packages
Based on the "Goroutines" category.
Alternatively, view Syncs alternatives based on common mentions on social networks and blogs.
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goworker
goworker is a Go-based background worker that runs 10 to 100,000* times faster than Ruby-based workers. -
pool
:speedboat: a limited consumer goroutine or unlimited goroutine pool for easier goroutine handling and cancellation -
go-workers
DISCONTINUED. ๐ท Library for safely running groups of workers concurrently or consecutively that require input and output through channels -
async
A safe way to execute functions asynchronously, recovering them in case of panic. It also provides an error stack aiming to facilitate fail causes discovery. -
gollback
Go asynchronous simple function utilities, for managing execution of closures and callbacks -
Hunch
Hunch provides functions like: All, First, Retry, Waterfall etc., that makes asynchronous flow control more intuitive. -
gpool
gpool - a generic context-aware resizable goroutines pool to bound concurrency based on semaphore. -
gowl
Gowl is a process management and process monitoring tool at once. An infinite worker pool gives you the ability to control the pool and processes and monitor their status. -
routine
go routine control, abstraction of the Main and some useful Executors.ๅฆๆไฝ ไธไผ็ฎก็Goroutine็่ฏ๏ผ็จๅฎ -
kyoo
Unlimited job queue for go, using a pool of concurrent workers processing the job queue entries -
execpool
A pool that spins up a given number of processes in advance and attaches stdin and stdout when needed. Very similar to FastCGI but works for any command. -
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concurrency-limiter
Concurrency limiter with support for timeouts , dynamic priority and context cancellation of goroutines. -
conexec
A concurrent toolkit to help execute funcs concurrently in an efficient and safe way. It supports specifying the overall timeout to avoid blocking. -
queue
package queue gives you a queue group accessibility. Helps you to limit goroutines, wait for the end of the all goroutines and much more. -
hands
Hands is a process controller used to control the execution and return strategies of multiple goroutines. -
async-job
AsyncJob is an asynchronous queue job manager with light code, clear and speed. I hope so ! ๐ฌ
InfluxDB - Purpose built for real-time analytics at any scale.
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README
Syncs - additional synchronization primitives
Package syncs provides additional synchronization primitives.
Install and update
go get -u github.com/go-pkgz/syncs
Details
Semaphore
Implements sync.Locker interface but for given capacity, thread safe. Lock increases count and Unlock - decreases. Unlock on 0 count will be blocked.
sema := syncs.NewSemaphore(10) // make semaphore with 10 initial capacity
for i :=0; i<10; i++ {
sema.Lock() // all 10 locks will pass, i.w. won't lock
}
sema.Lock() // this is 11 - will lock for real
// in some other place/goroutine
sema.Unlock() // decrease semaphore counter
SizedGroup
Mix semaphore and WaitGroup to provide sized waiting group. The result is a wait group allowing limited number of goroutine to run in parallel.
By default, the locking happens inside of goroutine, i.e. every call will be non-blocked, but some goroutines may wait if semaphore locked. It means - technically it doesn't limit number of goroutines, but rather number of running (active) goroutines.
In order to block goroutines from even starting use Preemptive option (see below).
swg := syncs.NewSizedGroup(5) // wait group with max size=5
for i :=0; i<10; i++ {
swg.Go(fn func(ctx context.Context){
doThings(ctx) // only 5 of these will run in parallel
})
}
swg.Wait()
ErrSizedGroup
Sized error group is a SizedGroup with error control. Works the same as errgrp.Group, i.e. returns first error. Can work as regular errgrp.Group or with early termination. Thread safe.
Supports both in-goroutine-wait via NewErrSizedGroup as well as outside of goroutine wait with Preemptive option. Another options are TermOnErr which will skip (won't start) all other goroutines if any error returned, and Context for early termination/timeouts.
Important! With Preemptive Go call can block. In case if maximum size reached the call will wait till number of running goroutines
dropped under max. This way we not only limiting number of running goroutines but also number of waiting goroutines.
ewg := syncs.NewErrSizedGroup(5, syncs.Preemptive) // error wait group with max size=5, don't try to start more if any error happened
for i :=0; i<10; i++ {
ewg.Go(fn func(ctx context.Context) error { // Go here could be blocked if trying to run >5 at the same time
err := doThings(ctx) // only 5 of these will run in parallel
return err
})
}
err := ewg.Wait()