CODEWITHSUNDEEP
mongodb-java
user2824073
user2824073

Reputation: 2485

Using MongoDB API in a Web application

I'd need to use the MongoClient and DB objects repeatedly in a Web application: 

MongoClient mongoClient = new MongoClient();
DB db = mongoClient.getDB( "test" );

Is it safe to cache and re-use these objects among different clients accessing our application?
Thanks

Upvotes: 0

Views: 55

Answers (2)

Paul
Paul

Reputation: 20061

Yes. From Getting Started with Java Driver, "you will only need one instance of class MongoClient even with multiple threads".

As a side note, the Mongo Java driver is a pain to use. The dev team I'm part of is very happy with Jongo, a wrapper around the Java driver that allows queries to be written more like shell queries.

Upvotes: 1

evanchooly
evanchooly

Reputation: 6233

You should create this once and inject it via CDI/Guice, if you can. If you can't do that, you could use a static factory method to return the one instance of your MongoClient. MongoClient maintains a connection pool and is safe to use between different threads. If you create a new MongoClient with each request, not only is it going to be a performance hit to set up that pool and open a new connection, but you'll likely leave dangling connections unless you properly close that MongoClient at the end of the request.

Upvotes: 1

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