CODEWITHSUNDEEP
javamongodb
fgakk
fgakk

Reputation: 1307

Getting version of Mongo Instance with Java driver

As the title suggests, i want to get the version of the mongo instance the client is connecting to. Currently i am using mongo java driver 2.9.3 and mongo instance is 2.2.2.

I require this, in order to support both $pushAll and $push with $each functions, since former is deprecated from version 2.4 in favor of latter. In short I want to know Java driver equivalent of db.version()

Upvotes: 6

Views: 6831

Answers (4)

HeptaDecane
HeptaDecane

Reputation: 11

This is what I did:

    MongoClient mongoClient = MongoClients.create("mongodb://localhost:27017");
    MongoDatabase db = mongoClient.getDatabase("test");
    Document document = db.runCommand(new Document("buildInfo",1));
    System.out.println("MongoDB Version: "+document.getString("version"));

My Configs

  • MongoDB JVM Driver: 4.1
  • JDK 11

Upvotes: 1

yegor256
yegor256

Reputation: 105083

This one works for me (Java client 3.5.0):

MongoClient client = //..
String version = client.getDatabase("dbname")
  .runCommand(new BsonDocument("buildinfo", new BsonString("")))
  .get("version")
  .toString();

Upvotes: 3

fgakk
fgakk

Reputation: 1307

Until future versions of driver presents a method, current solution is following, thanks to hint from here.

DB db = new Mongo("127.0.0.1").getDB("test");//Better use MongoClient since Mongo class is deprecated
System.out.println(db.getMongo().getVersion());//prints 2.9.3 driverversion
CommandResult commandResult = db.command("buildInfo");
System.out.println(commandResult.getString("version"));//prints 2.4.2 Note tried at home since my mongo version is 2.4.2

Upvotes: 7

Sergio Tulentsev
Sergio Tulentsev

Reputation: 230366

A little poking around revealed this:

> db.version()
2.4.6
> db.version
function (){
    return this.serverBuildInfo().version;
}
> db.serverBuildInfo
function (){
    return this._adminCommand( "buildinfo" );
}
> db.runCommand('buildinfo')
{
    "version" : "2.4.6",
    "gitVersion" : "b9925db5eac369d77a3a5f5d98a145eaaacd9673",
    "sysInfo" : "Linux ip-10-2-29-40 2.6.21.7-2.ec2.v1.2.fc8xen #1 SMP Fri Nov 20 17:48:28 EST 2009 x86_64 BOOST_LIB_VERSION=1_49",
    "loaderFlags" : "-fPIC -pthread -rdynamic",
    "compilerFlags" : "-Wnon-virtual-dtor -Woverloaded-virtual -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -Werror -pipe -fno-builtin-memcmp -O3",
    "allocator" : "tcmalloc",
    "versionArray" : [
        2,
        4,
        6,
        0
    ],
    "javascriptEngine" : "V8",
    "bits" : 64,
    "debug" : false,
    "maxBsonObjectSize" : 16777216,
    "ok" : 1
}

So you just can use equivalent of runCommand in your java code (don't know java driver, I'm ruby guy).

Upvotes: 6

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