get MongoDatabase with spring data mongodb - spring

Question

I am trying to tail the mongo oplog collection indefinitely. The code that I currently use is as below.
MongoClient mongoClient = new MongoClient(<host>,<27017>);
MongoCollection oplogColl =
mongoClient
.getDatabase("local")
.getCollection("oplog.rs");
MongoCursor oplogCursor =
oplogColl
.find(new Document("ts", filter))
.cursorType(CursorType.TailableAwait)
.noCursorTimeout(true)
.sort(new Document("$natural", 1))
.iterator();
I am trying to get the same implementation using spring-data where the mongo uri will be specified in the properties file. Hence I need to access MongoDatabase or MongoClient.
Tried using MongodbFactory class in spring, but it returns a instance of type DB, which is a old mongo implementation to access mongo.
How can I get to use MongoDatabase/MongoCollection/MongoClient using spring data.

Answer 1

MongoClient extends Mongo, so
#Configuration
public class AppConfig {
public #Bean Mongo mongo() throws UnknownHostException {
return new Mongo("localhost");
}
}
If you don't want to code to Mongo classes directly
/*
* Factory bean that creates the com.mongodb.Mongo instance
*/
#Bean
public MongoClientFactoryBean mongo() {
MongoClientFactoryBean mongo = new MongoClientFactoryBean();
mongo.setHost("localhost");
return mongo;
}
Edit:
#Configuration
public class AppConfig {
public #Bean MongoClient mongo() throws UnknownHostException {
return new MongoClient("localhost");
}
}
Usage:
#Autowired
private Mongo mongo;
MongoOperations mongoOps = new MongoTemplate(mongo, "databaseName");
Edit:
#Autowired
private MongoClient mongoClient;
MongoOperations mongoOps = new MongoTemplate(mongoClient, "databaseName");