Enabling mongo exception translation in spring-data-rest

Question

Following this tutorial, working with complete code, how do I enable exception translation for mongo?

When my mongo db is down, i'm getting 500 error from com.mongodb.MongoServerSelectionException. Shouldn't this be translated into DataAccessResourceFailureException with MongoExceptionTranslator? Am i supposed to register this bean somehow? I've tried with:

@Bean
public MongoExceptionTranslator mongoExceptionTranslator() {
    return new MongoExceptionTranslator();
}

but still no change

EDIT:

I've created a demo with the suggestions from Stackee007 but still can't get this to work

Answer 1

MongoExceptionTranslator is already registered if your configuration registers MongoFactoryBean or SimpleMongoDbFactory. You could configure mongo something like below which registers SimpleMongoDbFactory.

@Configuration
@EnableMongoRepositories
public class ApplicationConfig extends AbstractMongoConfiguration {

    @Override
    protected String getDatabaseName() {
        return "yyy";
    }

    @Override
    protected UserCredentials getUserCredentials() {
        return new UserCredentials("abc", "***");
    }

    @Override
    @Bean
    public Mongo mongo() throws Exception {
        List<ServerAddress> seeds = new ArrayList<ServerAddress>();
        seeds.add(new ServerAddress("xxxx"));
        seeds.add(new ServerAddress("xxx"));
        seeds.add(new ServerAddress("xx"));

        MongoClient mongo = new MongoClient(seeds);
        mongo.setReadPreference(ReadPreference.secondaryPreferred());
        mongo.setWriteConcern(WriteConcern.ACKNOWLEDGED);
        return mongo;
    }

    @Bean
    public GridFsTemplate gridFsTemplate() throws Exception {
        return new GridFsTemplate(mongoDbFactory(), mappingMongoConverter());
    }

}