Mongodb – How to run Mongo database db.currentOp(true) command using API

Using the Mongo Java API I can run the currentOp() command like this:

MongoClient mongoClient = null;
mongoClient = new MongoClient( "127.0.0.1", 27017);
db = mongoClient.getDB("admin");
db.command("currentOp");

But I only get details of current operations. I need to get details of idle connections too.

With reference with this
https://docs.mongodb.com/v3.0/reference/method/db.currentOp/#currentop-examples

Behavior

If you pass in true to db.currentOp(), the method returns information on all operations, including operations on idle connections and system operations.

db.currentOp(true)
Passing in true is equivalent to passing in a query document of { '$all': true }.

If you pass a query document to db.currentOp(), the output returns information only for the current operations that match the query. You can query on the Output Fields. See Examples.

You can also specify { '$all': true } query document to return information on all in-progress operations, including operations on idle connections and system operations. If the query document includes '$all': true as well as other query conditions, only the '$all': true applies.

While using this command db.command("currentOp(true)");, I get an exception like this:

"ok" : 0.0 , "errmsg" : "no such command: 'currentOp(true)', bad cmd: '{ currentOp(true): true }'" , "code" : 59}