### 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`):

    <dependency>
     <groupId>io.vertx</groupId>
     <artifactId>vertx-config-redis</artifactId>
     <version>4.2.0.CR1</version>
    </dependency>
    <dependency>
     <groupId>io.vertx</groupId>
     <artifactId>vertx-config</artifactId>
     <version>4.2.0.CR1</version>
    </dependency>

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

    compile 'io.vertx:vertx-config:4.2.0.CR1'
    compile 'io.vertx:vertx-config-redis:4.2.0.CR1'

#### Configuring the store

Once added to your classpath or dependencies, you need to configure the `ConfigRetriever` to use this store:

    ConfigStoreOptions store = new ConfigStoreOptions()
        .setType("redis")
        .setConfig(new JsonObject()
            .put("host", "localhost")
            .put("port", 6379)
            .put("key", "my-configuration")
        );

    ConfigRetriever retriever = ConfigRetriever.create(vertx,
        new ConfigRetrieverOptions().addStore(store));

The store configuration is used to create an instance of `Redis`. 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.