import com.mongodb.Mongo;

import com.mongodb.DBCollection;

import com.mongodb.BasicDBObject;

import com.mongodb.DBObject;

import com.mongodb.DBCursor;

import com.mongodb.DB;

import java.util.Set;

import java.util.List;

public class QuickTour {

public static void main(String[] args) throws Exception {

/*

* connect to the local database server for the 'mydb' database

*/

Mongo m = new Mongo();

DB db = m.getDB( "mydb" );

/*

* Authenticate - optional

*/

// boolean auth = db.authenticate("foo", "bar");

/*

* get a list of the collections in this database and print them out

*/

Set<String> colls = db.getCollectionNames();

for (String s : colls) {

System.out.println(s);

}

/*

* get a collection object to work with

*/

System.out.println(" --- ");

DBCollection coll = db.getCollection("testCollection");

/*

* drop all the data in it

*/

coll.drop();

/*

* make a document and insert it

*/

BasicDBObject doc = new BasicDBObject();

doc.put("name", "MongoDB");

doc.put("type", "database");

doc.put("count", 1);

BasicDBObject info = new BasicDBObject();

info.put("x", 203);

info.put("y", 102);

doc.put("info", info);

coll.insert(doc);

/*

* get it (since it's the only one in there since we dropped the rest earlier on)

*/

DBObject myDoc = coll.findOne();

System.out.println(myDoc);

/*

* now, lets add lots of little documents to the collection so we can explore queries and cursors

*/

System.out.println(" --- ");

for (int i=0; i < 100; i++) {

coll.insert(new BasicDBObject().append("i", i));

}

System.out.println(coll.getCount());

/*

* lets get all the documents in the collection and print them out

*/

System.out.println(" --- ");

DBCursor cur = coll.find();

while(cur.hasNext()) {

System.out.println(cur.next());

}

/*

* now use a query to get 1 document out

*/

System.out.println(" --- ");

BasicDBObject query = new BasicDBObject();

query.put("i", 71);

cur = coll.find(query);

while(cur.hasNext()) {

System.out.println(cur.next());

}

/*

* now use a query to get a larger set

*/

System.out.println(" --- ");

query = new BasicDBObject();

query.put("i", new BasicDBObject("$gt", 50)); // i.e. find all where i > 50

cur = coll.find(query);

while(cur.hasNext()) {

System.out.println(cur.next());

}

System.out.println(" --- ");

query = new BasicDBObject();

query.put("i", new BasicDBObject("$gt", 20).append("$lte", 30)); // i.e. 20 < i <= 30

cur = coll.find(query);

while(cur.hasNext()) {

System.out.println(cur.next());

}

/*

* create an index on the "i" field

*/

coll.createIndex(new BasicDBObject("i", 1)); // create index on "i", ascending

/*

* list the indexes on the collection

*/

List<DBObject> list = coll.getIndexInfo();

for (DBObject o : list) {

System.out.println(o);

}

/*

* See if the last operation had an error

*/

System.out.println("Last error : " + db.getLastError());

/*

* see if any previous operation had an error

*/

System.out.println("Previous error : " + db.getPreviousError());

/*

* force an error

*/

db.forceError();

/*

* See if the last operation had an error

*/

System.out.println("Last error : " + db.getLastError());

/*

* see if any previous operation had an error

*/

System.out.println("Previous error : " + db.getPreviousError());

/*

* See if the last operation had an error

*/

System.out.println("Last error : " + db.getLastError());

db.resetError();

/*

* see if any previous operation had an error

*/

System.out.println("Previous error : " + db.getPreviousError());

}

}