# Steroids

## Steroids bootstrap

Steroids Bootstrap is a small engine that can be used to scan the classpath and automatically load steroids modules. Bootstrap provides opinionated *convention over configuration* runtime simplifying the wiring between common components used in Rhiot-based applications.

In order to start using bootstrap, add the following Maven dependency to your project:

io.rhiotrhiot-steroids${rhiot.version}

Avaliable for rhiot.version >= 0.1.2

And then add the following code to your project:

```
import io.rhiot.steroids.bootstrap.Bootstrap;
...
Bootstrap bootstrap = new Bootstrap().start();
... // Do your stuff
bootstrap.stop();
```

You can also use our main class (which is particularly useful when working with the fat jars):

```
import io.rhiot.steroids.bootstrap.Bootstrap;
...
Bootstrap.main();
```

### Injecting MongoDB client

Steroids come with the MongoDB module that can be used to simplify access to the MongoDB database. In order to take the advantage from it, import the `rhiot-mongodb` module into your project:

io.rhiotrhiot-mongodb${rhiot.version}

Avaliable for rhiot.version >= 0.1.1

In order to inject the MongoDb client into your code, use the `Mongos.discoverMongo()` method:

```
import io.rhiot.mongodb.Mongos;
...
MongoClient mongo = Mongos.discoverMongo();
```

If `MONGODB_SERVICE_HOST` environment variable (or system property) is not specified, the `Mongos` will try to connect to the `mongodb` and `localhost` hosts respectively, using default MongoDB port (`27017`) or the one specified by the `MONGODB_SERVICE_HOST` environment variable (or system property).

By default MongoDB client will be configured to timeout the connection attempt after 1 second (yes, we like to fail fast). You can change timeout value by setting `MONGODB_CONNECT_TIMEOUT` the environment variable (or system property) to the desired number of timeout miliseconds. For example to set the connection timeout to 30 seconds you can use the following code:

```
System.setProperty("MONGODB_CONNECT_TIMEOUT", TimeUnit.SECONDS.toMillis(30) + "");
MongoClient mongo = Mongos.discoverMongo();
```


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