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# Apache Karaf MBean example

## Abstract

This example shows different ways to register a JMX MBean in the Apache Karaf MBeanServer.

It exposes a MBean interacting with a `BookingService`.

## Artifacts

* **karaf-mbean-example-api** is a common bundle providing the `Booking` POJO and a `BookingService` interface.
* **karaf-mbean-example-provider** is a very simple bundle providing a `BookingService` implementation.
* **karaf-mbean-example-simple** is a bundle doing a MBean registration using the Karaf util
* **karaf-mbean-example-blueprint** is a bundle doing a MBean registration using blueprint
* **karaf-mbean-example-scr** is a bundle doing a MBean registration using SCR

## Build

The build uses Apache Maven. Simply use:

```
mvn clean install
```

## Features and Deployment

On a running Karaf instance, register the features repository:

```
karaf@root()> feature:repo-add mvn:org.apache.karaf.examples/karaf-mbean-example-features/LATEST/xml
```

Then you can install the service provider feature:

```
karaf@root()> feature:install karaf-mbean-example-provider
```

Then you can test the different registration approach:

* To use the Karaf util registration, you install the `karaf-mbean-example-simple` feature:

```
karaf@root()> feature:install karaf-mbean-example-simple
```

* To use the blueprint registration, you install the `karaf-mbean-example-blueprint` feature:

```
karaf@root()> feature:install karaf-mbean-example-blueprint
``` 

* To use the SCR registration, you install the `karaf-mbean-example-scr` feature:

```
karaf@root()> feature:install karaf-mbean-example-scr
```  

## Usage

Once you have installed a feature registering the MBean, you can see the MBean using any JMX client, like `jconsole`.