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/*

* Copyright (c) 2008-2014 MongoDB, Inc.

*

* Licensed under the Apache License, Version 2.0 (the "License");

* you may not use this file except in compliance with the License.

* You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

package example;

import com.mongodb.BasicDBObject;

import com.mongodb.BulkWriteOperation;

import com.mongodb.BulkWriteResult;

import com.mongodb.Cursor;

import com.mongodb.DB;

import com.mongodb.DBCollection;

import com.mongodb.DBCursor;

import com.mongodb.DBObject;

import com.mongodb.MongoClient;

import com.mongodb.ParallelScanOptions;

import java.net.UnknownHostException;

import java.util.List;

import java.util.Set;

import static java.util.concurrent.TimeUnit.SECONDS;

/**

* The tutorial from http://docs.mongodb.org/ecosystem/tutorial/getting-started-with-java-driver/

*/

public class QuickTour {

// CHECKSTYLE:OFF

/**

* Run this main method to see the output of this quick example.

*

* @param args takes no args

* @throws UnknownHostException if it cannot connect to a MongoDB instance at localhost:27017

*/

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

// connect to the local database server

MongoClient mongoClient = new MongoClient();

/*

// Authenticate - optional

MongoCredential credential = MongoCredential.createMongoCRCredential(userName, database, password);

MongoClient mongoClient = new MongoClient(new ServerAddress(), Arrays.asList(credential));

*/

// get handle to "mydb"

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

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

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

for (final String s : collectionNames) {

System.out.println(s);

}

// get a collection object to work with

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

// drop all the data in it

coll.drop();

// make a document and insert it

BasicDBObject doc = new BasicDBObject("name", "MongoDB")

.append("type", "database")

.append("count", 1)

.append("info", new BasicDBObject("x", 203).append("y", 102));

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

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

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

}

System.out.println("total # of documents after inserting 100 small ones (should be 101) " + coll.getCount());

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

DBCursor cursor = coll.find();

try {

while (cursor.hasNext()) {

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

}

} finally {

cursor.close();

}

// now use a query to get 1 document out

BasicDBObject query = new BasicDBObject("i", 71);

cursor = coll.find(query);

try {

while (cursor.hasNext()) {

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

}

} finally {

cursor.close();

}

// $ Operators are represented as strings

query = new BasicDBObject("j", new BasicDBObject("$ne", 3))

.append("k", new BasicDBObject("$gt", 10));

cursor = coll.find(query);

try {

while(cursor.hasNext()) {

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

}

} finally {

cursor.close();

}

// now use a range query to get a larger subset

// find all where i > 50

query = new BasicDBObject("i", new BasicDBObject("$gt", 50));

cursor = coll.find(query);

try {

while (cursor.hasNext()) {

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

}

} finally {

cursor.close();

}

// range query with multiple constraints

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

cursor = coll.find(query);

try {

while (cursor.hasNext()) {

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

}

} finally {

cursor.close();

}

// Count all documents in a collection but take a maximum second to do so

coll.find().maxTime(1, SECONDS).count();

// Bulk operations

BulkWriteOperation builder = coll.initializeOrderedBulkOperation();

builder.insert(new BasicDBObject("_id", 1));

builder.insert(new BasicDBObject("_id", 2));

builder.insert(new BasicDBObject("_id", 3));

builder.find(new BasicDBObject("_id", 1)).updateOne(new BasicDBObject("$set", new BasicDBObject("x", 2)));

builder.find(new BasicDBObject("_id", 2)).removeOne();

builder.find(new BasicDBObject("_id", 3)).replaceOne(new BasicDBObject("_id", 3).append("x", 4));

BulkWriteResult result = builder.execute();

System.out.println("Ordered bulk write result : " + result);

// Unordered bulk operation - no guarantee of order of operation

builder = coll.initializeUnorderedBulkOperation();

builder.find(new BasicDBObject("_id", 1)).removeOne();

builder.find(new BasicDBObject("_id", 2)).removeOne();

result = builder.execute();

System.out.println("Ordered bulk write result : " + result);

// parallelScan

ParallelScanOptions parallelScanOptions = ParallelScanOptions

.builder()

.numCursors(3)

.batchSize(300)

.build();

List<Cursor> cursors = coll.parallelScan(parallelScanOptions);

for (Cursor pCursor: cursors) {

while (pCursor.hasNext()) {

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

}

}

// release resources

db.dropDatabase();

mongoClient.close();

}

// CHECKSTYLE:ON

}