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81 lines
2.2 KiB
Markdown
81 lines
2.2 KiB
Markdown
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[](https://godoc.org/github.com/jackc/puddle)
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# Puddle
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Puddle is a tiny generic resource pool library for Go that uses the standard
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context library to signal cancellation of acquires. It is designed to contain
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the minimum functionality required for a resource pool. It can be used directly
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or it can be used as the base for a domain specific resource pool. For example,
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a database connection pool may use puddle internally and implement health checks
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and keep-alive behavior without needing to implement any concurrent code of its
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own.
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## Features
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* Acquire cancellation via context standard library
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* Statistics API for monitoring pool pressure
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* No dependencies outside of standard library and golang.org/x/sync
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* High performance
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* 100% test coverage of reachable code
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## Example Usage
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```go
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package main
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import (
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"context"
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"log"
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"net"
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"github.com/jackc/puddle/v2"
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)
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func main() {
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constructor := func(context.Context) (net.Conn, error) {
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return net.Dial("tcp", "127.0.0.1:8080")
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}
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destructor := func(value net.Conn) {
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value.Close()
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}
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maxPoolSize := int32(10)
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pool, err := puddle.NewPool(&puddle.Config[net.Conn]{Constructor: constructor, Destructor: destructor, MaxSize: maxPoolSize})
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if err != nil {
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log.Fatal(err)
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}
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// Acquire resource from the pool.
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res, err := pool.Acquire(context.Background())
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if err != nil {
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log.Fatal(err)
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}
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// Use resource.
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_, err = res.Value().Write([]byte{1})
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if err != nil {
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log.Fatal(err)
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}
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// Release when done.
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res.Release()
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}
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```
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## Status
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Puddle is stable and feature complete.
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* Bug reports and fixes are welcome.
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* New features will usually not be accepted if they can be feasibly implemented in a wrapper.
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* Performance optimizations will usually not be accepted unless the performance issue rises to the level of a bug.
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## Supported Go Versions
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puddle supports the same versions of Go that are supported by the Go project. For [Go](https://golang.org/doc/devel/release.html#policy) that is the two most recent major releases. This means puddle supports Go 1.19 and higher.
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## License
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MIT
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