Common libraries for the type of Go applications I toy with and build.
The libraries are a mixture of foundation, utility and system libraries for various purposes.
The foundation libraries are libraries on which all other libraries in the collection depends.
logging
A thin wrapper library around Simon Eskildsen's excellent logrus that provides caller annotations to make it easier to figure out where log messages are coming from:
package main
import (
logrus "github.com/Sirupsen/logrus"
log "github.com/nickbruun/gocommons/logging"
"sync"
)
var wg sync.WaitGroup
func MyFunc() {
log.Debug("Debug time!")
wg.Add(1)
go func() {
log.Info("Goroutines are presented understandably as well")
wg.Done()
}()
wg.Wait()
}
func main() {
logrus.SetLevel(logrus.DebugLevel)
log.Info("Hola, mundo")
MyFunc()
}Results in:
INFO[0000] Hola, mundo file=/Users/nick/Code/gocommonsdev/src/github.com/nickbruun/gocommons/play/main.go func=main.main line=25
DEBU[0000] Debug time! file=/Users/nick/Code/gocommonsdev/src/github.com/nickbruun/gocommons/play/main.go func=main.MyFunc line=12
INFO[0000] Go-routines are presented understandable as well file=/Users/nick/Code/gocommonsdev/src/github.com/nickbruun/gocommons/play/main.go func=main.func·001 line=16
zkutils
Utilities for interacting with and testing integrations with ZooKeeper, built on top of go-zookeeper. Among other things, the library provides a connection manager wrapper class, that allows multiplexed access to all events received by a connection. Derived from that is a session watcher, which can be used to identify when a connection loss to a ZooKeeper cluster brings the validity of an ephemeral node into question.
distributed/locking
Distributed mutually exclusive locking facilities. Currently only implemented for ZooKeeper, with a cautious approach to the validity of ephemeral nodes when clusters are unstable.
distributed/leadership
Leadership election and observation facilities. Currently only implemented for ZooKeeper as an extended version of the leader election recipe, which takes a cautious approach to the validity of ephemeral nodes when clusters are unstable, preferring giving up leadership than risking races.