how to check from a driver, if mongoDB server is running

java mongodb mongo-java
zmila picture zmila · Jul 26, 2011 · Viewed 23.8k times · Source

I wonder, if there is a way to check if mongoDB server is running from java driver for mongoDB?

According to the tutorial, I can do 

Mongo m = new Mongo();
// or
Mongo m = new Mongo( "localhost" , 27017 );
// and
DB db = m.getDB( "mydb" );

But how to check that I can use these Mongo and DB? I see no isConnected() method in the API. 

db.getConnector().isOpen()

returns true

The only way I found is call db.getDatabaseNames() and catch MongoException.

If there some more civilized approach?

Answer

Benoît Guérout picture Benoît Guérout · May 29, 2013

You can run a ping command 

 Mongo mongo = new Mongo();
 DBObject ping = new BasicDBObject("ping", "1");
 try {
       mongo.getDB("dbname").command(ping);
 } catch (MongoException e) {
       ...
 }

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