gosexy/redis

Provides Go bindings for the official C redis client (hiredis).

How to install/upgrade

go get -u menteslibres.net/gosexy/redis

Usage

Install the package with go get and use the import keyword to use it in your program.

import "menteslibres.net/gosexy/redis"

The redis.New() function returns a *redis.Client struct that you can use to interact with any redis server.

This is a code example on how to connect and send a PING command.

var client *redis.Client

client = redis.New()

err = client.Connect(host, port)

if err != nil {
  log.Fatalf("Connect failed: %s\n", err.Error())
  return
}

log.Println("Connected to redis-server.")

log.Printf("Sending PING...\n")
s, err = client.Ping()

if err != nil {
  log.Fatalf("Could not ping: %s\n", err.Error())
  return
}

log.Printf("Received %s!\n", s)

client.Quit()

This is the expected output of the above ping-pong example:

2013/02/19 07:15:52 Connected to redis-server.
2013/02/19 07:15:52 Sending PING...
2013/02/19 07:15:52 Received PONG!

Always use client.Quit() to close the client connection.

Examples

Some examples are included.

Simple SET and GET

An example on how to use *redis.Client to send SET and GET commands to the client.

var client *redis.Client
var err error

client = redis.New()

err = client.Connect(host, port)

if err != nil {
  log.Fatalf("Connect failed: %s\n", err.Error())
  return
}

log.Println("Connected to redis-server.")

// DEL hello
log.Printf("DEL hello\n")
client.Del("hello")

// SET hello 1
log.Printf("SET hello 1\n")
client.Set("hello", 1)

// INCR hello
log.Printf("INCR hello\n")
client.Incr("hello")

// GET hello
log.Printf("GET hello\n")
s, err = client.Get("hello")

if err != nil {
  log.Fatalf("Could not GET: %s\n", err.Error())
  return
}

log.Printf("> hello = %s\n", s)

client.Quit()

This is the expected output of the above set-get example:

2013/02/19 07:19:37 Connected to redis-server.
2013/02/19 07:19:37 DEL hello
2013/02/19 07:19:37 SET hello 1
2013/02/19 07:19:37 INCR hello
2013/02/19 07:19:37 GET hello
2013/02/19 07:19:37 > hello = 2

Subscriptions

You can use SUBSCRIBE and PSUBSCRIBE with channels and goroutines inside a non-blocking connection. You can create a non-blocking connection using the ConnectNonBlock or ConnectUnixNonBlock functions.

go consumer.Subscribe(rec, "channel")

var ls []string

for {
  ls = <-rec
  log.Printf("Consumer received: %v\n", strings.Join(ls, ", "))
}

The above snippet is part of a subscription example, if you run the full example you'll see something like this:

2013/02/19 07:25:33 Consumer received: message, channel, Hello world!
2013/02/19 07:25:33 Consumer received: message, channel, Do you know how to count?
2013/02/19 07:25:33 Consumer received: message, channel, 0
2013/02/19 07:25:33 Consumer received: message, channel, 1
2013/02/19 07:25:33 Consumer received: message, channel, 2

Documentation

See the online docs for gosexy/redis at godoc.org.

Don't forget to check the complete list of redis commands too!

Licenses

This library wraps the awesome hiredis.c client that is released under this license:

/*
 * Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com>
 * Copyright (c) 2010-2011, Pieter Noordhuis <pcnoordhuis at gmail dot com>
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *   * Redistributions of source code must retain the above copyright notice,
 *     this list of conditions and the following disclaimer.
 *   * Redistributions in binary form must reproduce the above copyright
 *     notice, this list of conditions and the following disclaimer in the
 *     documentation and/or other materials provided with the distribution.
 *   * Neither the name of Redis nor the names of its contributors may be used
 *     to endorse or promote products derived from this software without
 *     specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

It also includes portions of code with the following license:

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

The code that wraps them all, gosexy/redis, is released under an equally friendly license:

Copyright (c) 2013 José Carlos Nieto, https://menteslibres.net/xiam

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

briankassouf / redis