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# jedis

[Redis](http://redis.io/) cache and key/value data store for Jooby. exports a [Jedis](https://github.com/xetorthio/jedis) service.

## dependency

```xml
<dependency>
  <groupId>org.jooby</groupId>
  <artifactId>jooby-jedis</artifactId>
  <version>1.4.1</version>
</dependency>
```

## usage

It is pretty straightforward:

```properties
# define a database URI

db = "redis://localhost:6379"
```

```java
{
  use(new Redis());

   get("/:key/:value", req -> {
     try (Jedis jedis = require(Jedis.class)) {
       jedis.set(req.param("key").value(), req.param("value").value());
       return jedis.get(req.param("key").value());
     }
   });
}
```

## configuration

This module creates a [JedisPool]. A default pool is created with a max of ```128``` instances.

The pool can be customized from your ```application.conf```:

```properties
db = "redis://localhost:6379"

# increase pool size to 200

jedis.pool.maxTotal = 200
```

### two or more redis connections

In case you need two or more Redis connection, just do:

```java
{
  use(new Redis()); // default is "db"
  use(new Redis("db1"));

  get("/:key/:value", req -> {
    try (Jedis jedis = require("db1", Jedis.class)) {
      jedis.set(req.param("key").value(), req.param("value").value());
      return jedis.get(req.param("key").value());
    }
  });
}
```

application.conf:

```properties
db = "redis://localhost:6379/0"

db1 = "redis://localhost:6379/1"
```

Pool configuration for ```db1``` is inherited from ```jedis.pool```. If you need
to tweak the pool configuration for ```db1``` just do:

```properties
db1 = "redis://localhost:6379/1"

# ONLY 10 for db1

jedis.db1.maxTotal = 10
```

For more information about [Jedis](https://github.com/xetorthio/jedis) checkout the [wiki](https://github.com/xetorthio/jedis/wiki)

# redis session store

## dependency

```xml
<dependency>
  <groupId>org.jooby</groupId>
  <artifactId>jooby-jedis</artifactId>
  <version>1.4.1</version>
</dependency>
```

## usage

```java
{
  use(new Redis());

  session(RedisSessionStore.class);

  get("/", req -> {
   req.session().set("name", "jooby");
  });
}
```

The ```name``` attribute and value will be stored in a [Redis](http://redis.io). Sessions are persisted as [hashes](http://redis.io/topics/data-types#hashes).

## options

### timeout

By default, a [Redis](http://redis.io) session will expire after ```30 minutes```. Changing the default timeout is as simple as:

```properties

# 8 hours
session.timeout = 8h

# 15 seconds

session.timeout = 15

# 120 minutes

session.timeout = 120m

# no timeout

session.timeout = -1
```

### key prefix

Default redis key prefix is ```sessions```. Sessions in [redis] will look like: ```sessions:ID```

It's possible to change the default key setting the ```jedis.sesssion.prefix``` properties

That's all folks! Enjoy it!

TBD: Object mapping? https://github.com/xetorthio/johm?

## jedis.conf
These are the default properties for jedis:

```properties
# jedis default config

# jedis

jedis.timeout = 2s

# pool config

jedis.pool.maxTotal = 128

jedis.pool.maxIdle = 10

jedis.pool.minIdle = 10

jedis.pool.lifo = true

jedis.pool.maxWait = -1

jedis.pool.minEvictableIdle = 30m

jedis.pool.softMinEvictableIdle = 30m

jedis.pool.numTestsPerEvictionRun = 3

jedis.pool.evictionPolicyClassName = org.apache.commons.pool2.impl.DefaultEvictionPolicy

jedis.pool.testOnBorrow = false

jedis.pool.testOnReturn = false

jedis.pool.testWhileIdle = false

jedis.pool.timeBetweenEvictionRuns = -1

jedis.pool.blockWhenExhausted = true

jedis.pool.jmxEnabled = false

jedis.pool.jmxNamePrefix = redis-pool

# session store, key prefix and timeout in seconds

jedis.session.prefix = sessions

jedis.session.timeout = ${session.timeout}
```