Config Annotation binding?

[Guoqin Zheng]

Hey all,

I am trying to inject configuration pojo with guice by annotation. But I find difficulty to do that. Basically what I want to achieve is like following:

Say I have the following classes 

@Retention(RUNTIME)
@Target({ FIELD, PARAMETER })
@BindingAnnotation
public @interface Config {
    /**
     * The config key to bind
     */
    String key();
}

/**
 * A tag interface to indicate that a class is a Configuration.

 */

public interface Configuration {

}

/**
 * An example: App Configuration
 */

public class AppConfiguration implements Configuration {
    private String appId;
    private String appOwner;
    private String appDesc;
}


/**
 * Another config example: MySql Connection setting
 */
public static class MysqlConnection implements Configuration {
    private String host;
    private int port;
    private int timeout;
}

You could define any other configuration POJOs.

Also, assuming I have a config provider that could load the config file and map to the pojo:

public interface ConfigurationProvider {

    /**
     * Get the configuration pojo at the node path
     */
    <T extends Configuration> T getConfiguration(
            Class<T> configKlass,
            String nodePath) throws ConfigurationProviderException;
}

Now, I would like Guice to inject these configuration somehow like:

public class MyService {
    @Inject
    public MyService(
            @Config("app_config")Configuration.AppConfiguration appConfig,
            @Config("mysql_conn")Configuration.MysqlConnection mysqlConnection) {

    }
}

Just curious if this is possible with Guice injection? If yes, how can I achieve that?

Thank you!