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github.com/jackc/puddle/v2
Puddle is a tiny generic resource pool library for Go that uses the standard context library to signal cancellation of acquires. It is designed to contain the minimum functionality required for a resource pool. It can be used directly or it can be used as the base for a domain specific resource pool. For example, a database connection pool may use puddle internally and implement health checks and keep-alive behavior without needing to implement any concurrent code of its own.
package main
import (
"context"
"log"
"net"
"github.com/jackc/puddle/v2"
)
func main() {
constructor := func(context.Context) (net.Conn, error) {
return net.Dial("tcp", "127.0.0.1:8080")
}
destructor := func(value net.Conn) {
value.Close()
}
maxPoolSize := int32(10)
pool, err := puddle.NewPool(&puddle.Config[net.Conn]{Constructor: constructor, Destructor: destructor, MaxSize: maxPoolSize})
if err != nil {
log.Fatal(err)
}
// Acquire resource from the pool.
res, err := pool.Acquire(context.Background())
if err != nil {
log.Fatal(err)
}
// Use resource.
_, err = res.Value().Write([]byte{1})
if err != nil {
log.Fatal(err)
}
// Release when done.
res.Release()
}
Puddle is stable and feature complete.
puddle supports the same versions of Go that are supported by the Go project. For Go that is the two most recent major releases. This means puddle supports Go 1.19 and higher.
MIT
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