Java tutorial
/* * Copyright 2015 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 tour; import com.mongodb.MongoClient; import com.mongodb.MongoClientURI; import com.mongodb.client.MongoCollection; import com.mongodb.client.MongoCursor; import com.mongodb.client.MongoDatabase; import com.mongodb.client.model.BulkWriteOptions; import com.mongodb.client.model.CreateCollectionOptions; import com.mongodb.client.model.DeleteOneModel; import com.mongodb.client.model.InsertOneModel; import com.mongodb.client.model.ReplaceOneModel; import com.mongodb.client.model.UpdateOneModel; import com.mongodb.client.model.WriteModel; import org.bson.Document; import java.util.ArrayList; import java.util.List; import java.util.concurrent.TimeUnit; import static com.mongodb.client.model.Filters.and; import static com.mongodb.client.model.Filters.eq; import static com.mongodb.client.model.Filters.gt; import static com.mongodb.client.model.Filters.lte; /** * The tutorial from the 3.0 API version of http://www.mongodb.org/display/DOCS/Java+Tutorial. */ public class NewQuickTour { /** * Run this main method to see the output of this quick example. * * @param args takes an optional single argument for the connection string */ public static void main(final String[] args) { MongoClient mongoClient; if (args.length == 0) { // connect to the local database server mongoClient = new MongoClient(); } else { mongoClient = new MongoClient(new MongoClientURI(args[0])); } // get handle to "mydb" database MongoDatabase database = mongoClient.getDatabase("mydb"); database.drop(); // get a list of the collections in this database and print them out List<String> collectionNames = database.listCollectionNames().into(new ArrayList<String>()); for (final String s : collectionNames) { System.out.println(s); } // get a handle to the "test" collection MongoCollection<Document> collection = database.getCollection("test"); // drop all the data in it collection.drop(); // make a document and insert it Document doc = new Document("name", "MongoDB").append("type", "database").append("count", 1).append("info", new Document("x", 203).append("y", 102)); collection.insertOne(doc); // get it (since it's the only one in there since we dropped the rest earlier on) Document myDoc = collection.find().first(); System.out.println(myDoc); // now, lets add lots of little documents to the collection so we can explore queries and cursors List<Document> documents = new ArrayList<Document>(); for (int i = 0; i < 100; i++) { documents.add(new Document("i", i)); } collection.insertMany(documents); System.out.println( "total # of documents after inserting 100 small ones (should be 101) " + collection.count()); // lets get all the documents in the collection and print them out MongoCursor<Document> cursor = collection.find().iterator(); try { while (cursor.hasNext()) { System.out.println(cursor.next()); } } finally { cursor.close(); } for (Document cur : collection.find()) { System.out.println(cur); } // now use a query to get 1 document out myDoc = collection.find(eq("i", 71)).first(); System.out.println(myDoc); // now use a range query to get a larger subset cursor = collection.find(gt("i", 50)).iterator(); try { while (cursor.hasNext()) { System.out.println(cursor.next()); } } finally { cursor.close(); } // range query with multiple constraints cursor = collection.find(and(gt("i", 50), lte("i", 100))).iterator(); try { while (cursor.hasNext()) { System.out.println(cursor.next()); } } finally { cursor.close(); } // max time collection.find().maxTime(1, TimeUnit.SECONDS).first(); collection.drop(); // ordered bulk writes List<WriteModel<Document>> writes = new ArrayList<WriteModel<Document>>(); writes.add(new InsertOneModel<Document>(new Document("_id", 4))); writes.add(new InsertOneModel<Document>(new Document("_id", 5))); writes.add(new InsertOneModel<Document>(new Document("_id", 6))); writes.add( new UpdateOneModel<Document>(new Document("_id", 1), new Document("$set", new Document("x", 2)))); writes.add(new DeleteOneModel<Document>(new Document("_id", 2))); writes.add(new ReplaceOneModel<Document>(new Document("_id", 3), new Document("_id", 3).append("x", 4))); collection.bulkWrite(writes); collection.drop(); collection.bulkWrite(writes, new BulkWriteOptions().ordered(false)); // getting a list of databases for (String name : mongoClient.listDatabaseNames()) { System.out.println(name); } // drop a database mongoClient.dropDatabase("databaseToBeDropped"); // create a collection database.createCollection("cappedCollection", new CreateCollectionOptions().capped(true).sizeInBytes(0x100000)); for (String name : database.listCollectionNames()) { System.out.println(name); } // create an ascending index on the "i" field collection.createIndex(new Document("i", 1)); // list the indexes on the collection for (final Document index : collection.listIndexes()) { System.out.println(index); } // create a text index on the "content" field collection.createIndex(new Document("content", "text")); collection.insertOne(new Document("_id", 0).append("content", "textual content")); collection.insertOne(new Document("_id", 1).append("content", "additional content")); collection.insertOne(new Document("_id", 2).append("content", "irrelevant content")); // Find using the text index Document search = new Document("$search", "textual content -irrelevant"); Document textSearch = new Document("$text", search); long matchCount = collection.count(textSearch); System.out.println("Text search matches: " + matchCount); // Find using the $language operator textSearch = new Document("$text", search.append("$language", "english")); matchCount = collection.count(textSearch); System.out.println("Text search matches (english): " + matchCount); // Find the highest scoring match Document projection = new Document("score", new Document("$meta", "textScore")); myDoc = collection.find(textSearch).projection(projection).first(); System.out.println("Highest scoring document: " + myDoc); // release resources mongoClient.close(); } }