=== Redis Configuration Store

The Redis Configuration Store extends the Vert.x Configuration Retriever and provides the
way to retrieve configuration from a Redis server.

==== Using the Redis Configuration Store

To use the Redis Configuration Store, add the following dependency to the
_dependencies_ section of your build descriptor:

* Maven (in your `pom.xml`):

[source,xml,subs="+attributes"]
----
<dependency>
  <groupId>io.vertx</groupId>
  <artifactId>vertx-config-redis-scala_2.12</artifactId>
  <version>3.5.4</version>
</dependency>
<dependency>
  <groupId>io.vertx</groupId>
  <artifactId>vertx-config</artifactId>
  <version>3.5.4</version>
</dependency>
----

* Gradle (in your `build.gradle` file):

[source,groovy,subs="+attributes"]
----
compile 'io.vertx:vertx-config:3.5.4'
compile 'io.vertx:vertx-config-redis-scala_2.12:3.5.4'
----

==== Configuring the store

Once added to your classpath or dependencies, you need to configure the
`link:../../scaladocs/io/vertx/scala/config/ConfigRetriever.html[ConfigRetriever]` to use this store:

[source, scala]
----
var store = ConfigStoreOptions()
  .setType("redis")
  .setConfig(new io.vertx.core.json.JsonObject().put("host", "localhost").put("port", 6379).put("key", "my-configuration"))


var retriever = ConfigRetriever.create(vertx, ConfigRetrieverOptions()
  .setStores(Set(store))
)

----

The store configuration is used to create an instance of
`link:../../scaladocs/io/vertx/scala/redis/RedisClient.html[RedisClient]`. check the documentation of the Vert.x Redis Client
for further details.

In addition, you can set the `key` instructing the store in which _field_ the configuration
is stored. `configuration` is used by default.

The created Redis client retrieves the configuration using the `HGETALL` configuration.