Redis a 5 minutes guide

1. Redis:Getting
started (5 min
guide)
A noSQL database quick and fast and
almost Italian :)

2. What is Redis
Is an advanced key-value store.
A redis serve can contain the following data structures:
● strings
● hashes
● lists
● sets
● sorted sets

3. Installing
Linux
$ wget http://download.redis.io/releases/redis-2.6.16.tar.gz
$ tar xzf redis-2.6.16.tar.gz
$ cd redis-2.6.16
$ make
Mac Users:
$ port install redis
$ brew install redis
Windows:
ops :(

4. Getting started 1
Start the server
$ redis-server
_._
_.-``__ ''-._
_.-``
`. `_. ''-._
.-`` .-```. ```/
(
'
,
Redis 2.6.16 (00000000/0) 64 bit
_.,_ ''-._
.-` | `,
)
Running in stand alone mode
|`-._`-...-` __...-.``-._|'` _.-'|
|
`-._
`-._
`._
`-.__.-'
`-._`-._
`-._
`-._`-._
`-._
_.-'_.-'
`-.__.-'
`-._
|
http://redis.io
_.-'
_.-'_.-'|
`-._`-.__.-'_.-'
`-._
Port: 6379
PID: 7350
_.-'
_.-'_.-'
`-.__.-'
|
_.-'_.-'|
`-._`-.__.-'_.-'
|`-._`-._
|
_.-'
`-._ `-./ _.-'
|`-._`-._
|
/
|
_.-'
_.-'
_.-'
`-.__.-'
[7350] 10 Sep 13:03:33.329 # Server started, Redis version 2.6.16
[7350] 10 Sep 13:03:33.329 * The server is now ready to accept connections on port 6379

5. Getting started 2
Start the server
$ redis-client
_._
redis 127.0.0.1:6379> get foo
"mirko2"
redis 127.0.0.1:6379> set counter 100
OK
redis 127.0.0.1:6379> incr counter
(integer) 101
redis 127.0.0.1:6379> RPUSH mylist "Mirko"
(integer) 1
redis 127.0.0.1:6379> RPUSH mylist "Mario"
(integer) 2
redis 127.0.0.1:6379> RPUSH mylist "Fabio"
(integer) 3
redis 127.0.0.1:6379> lrange mylist 0 2
1) "Mirko"
2) "Mario"
3) "Fabio"

6. Try redit
Interactive console with the commands available
http://try.redis.io/

7. Even more...
Creating a simple hashmap
Hashes
Redis Hashes are maps between string fields and string values, so they are the perfect data type to represent objects (eg: A User with a
number of fields like name, surname, age, and so forth):
redis 127.0.0.1:6379> HMSET user:1 username antirez password Mirko age 33
OK
redis 127.0.0.1:6379> HGETALL user:1
1) "username"
2) "antirez"
3) "password"
4) "Mirko"
5) "age"
6) "33"
Want to check is a user exists? (Login)
HMGET user:1000 password password

8. Ok, perfect. But what in
Java?
Very nice and easy project is
https://github.com/xetorthio/jedis
<dependency>
<groupId>redis.clients</groupId>
<artifactId>jedis</artifactId>
<version>2.0.0</version>
<type>jar</type>
<scope>compile</scope>
</dependency>
Jedis jedis = new Jedis("localhost");
jedis.set("foo", "bar");
String value = jedis.get("foo");