tl  tr
  Home | Tutorials | Articles | Videos | Products | Tools | Search
Open Source | Tag Cloud | Follow Us | Bookmark | Contact   
 
 No SQL > Mongo DB > How to get all users in Mongo Database

How to get all users in Mongo Database 

MongoDB is a scalable, high-performance, open source NoSQL database. It offers Ad hoc queries, Indexing, Replication, Load balancing, File storage (GridFS), Aggregation, MapReduce and Server-side JavaScript execution. This requires the library mongo-2.8.0.jar to be present in the classpath. The following example shows how to list all users in a given Mongo database.

File Name  :  
com/bethecoder/tutorials/mongodb/tests/GetUsersTest.java 
Author  :  Sudhakar KV
Email  :  kvenkatasudhakar@gmail.com
   
package com.bethecoder.tutorials.mongodb.tests;

import java.net.UnknownHostException;

import com.mongodb.DB;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import com.mongodb.DBObject;
import com.mongodb.Mongo;
import com.mongodb.MongoException;

public class GetUsersTest {

  /**
   @param args
   */
  public static void main(String[] args) {

    try {
      //Connect to mongoDB with given IP and PORT
      Mongo mongo = new Mongo("localhost"27017);
      
      //Get the database object
      DB database = mongo.getDB("mytestdb");
      
      //Gets a collection with a given name.
      DBCollection userCollection = database.getCollection("system.users");
      
      //Queries for all objects in this collection
      DBCursor dbCursor = userCollection.find();
      DBObject userRecord = null;
      
      while (dbCursor.hasNext()) {
        userRecord = dbCursor.next();
        System.out.println(userRecord);
      }
      
    catch (UnknownHostException e) {
      e.printStackTrace();
    catch (MongoException e) {
      e.printStackTrace();
    }
  }
}
   

It gives the following output,
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc26e"} , "user" : "user1" , 
	"pwd" : "86c2563c85a9cf4d5f05d4c42674bc0d" , "readOnly" : false}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc26f"} , "user" : "user2" , 
	"pwd" : "a94779325b5df23dc7146b6d29e0812e" , "readOnly" : false}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc270"} , "user" : "user3" , 
	"pwd" : "b54682a7b133c4078b7073afa01ee913" , "readOnly" : false}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc271"} , "user" : "user4" , 
	"pwd" : "9260e6d40933f393293f764cae00eab4" , "readOnly" : false}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc272"} , "user" : "readonlyuser1" , 
	"pwd" : "1255cd2eb04d2cc8c1a4739f454c652b" , "readOnly" : true}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc273"} , "user" : "readonlyuser2" , 
	"pwd" : "e37efdd90c603d6fbc8bf89e38d3c0ec" , "readOnly" : true}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc274"} , "user" : "readonlyuser3" , 
	"pwd" : "3ebac9f3e2abb3037b41820bc8b3e2dd" , "readOnly" : true}
{ "_id" : { "$oid" : "503bc7c672816f08a5ecc275"} , "user" : "readonlyuser4" , 
	"pwd" : "b6e658e83d2407939bbac18dcfc0abdf" , "readOnly" : true}


                    Print

   



Books Recommendation

 
 
bl  br