Example usage for com.mongodb.client MongoClients create

Introduction

In this page you can find the example usage for com.mongodb.client MongoClients create.

Prototype

public static MongoClient create() 

Source Link

Document

Creates a new client with the default connection string "mongodb://localhost".

Usage

From source file:documentation.CausalConsistencyExamples.java

License:Apache License

/**
 * Run this main method to see the output of this quick example.
 *
 * @param args takes an optional single argument for the connection string
 *///w  w w  .j  a  v  a2  s  .  c o  m
public static void main(final String[] args) {
    setupDatabase();
    MongoClient client = MongoClients.create();

    // Start Causal Consistency Example 1
    // Example 1: Use a causally consistent session to ensure that the update occurs before the insert.
    ClientSession session1 = client
            .startSession(ClientSessionOptions.builder().causallyConsistent(true).build());
    Date currentDate = new Date();
    MongoCollection<Document> items = client.getDatabase("test").withReadConcern(ReadConcern.MAJORITY)
            .withWriteConcern(WriteConcern.MAJORITY.withWTimeout(1000, TimeUnit.MILLISECONDS))
            .getCollection("test");

    items.updateOne(session1, eq("sku", "111"), set("end", currentDate));

    Document document = new Document("sku", "nuts-111").append("name", "Pecans").append("start", currentDate);
    items.insertOne(session1, document);
    // End Causal Consistency Example 1

    // Start Causal Consistency Example 2
    // Example 2: Advance the cluster time and the operation time to that of the other session to ensure that
    // this client is causally consistent with the other session and read after the two writes.
    ClientSession session2 = client
            .startSession(ClientSessionOptions.builder().causallyConsistent(true).build());
    session2.advanceClusterTime(session1.getClusterTime());
    session2.advanceOperationTime(session1.getOperationTime());

    items = client.getDatabase("test").withReadPreference(ReadPreference.secondary())
            .withReadConcern(ReadConcern.MAJORITY)
            .withWriteConcern(WriteConcern.MAJORITY.withWTimeout(1000, TimeUnit.MILLISECONDS))
            .getCollection("items");

    for (Document item : items.find(session2, eq("end", BsonNull.VALUE))) {
        System.out.println(item);
    }
    // End Causal Consistency Example 2
}

---

From source file:documentation.CausalConsistencyExamples.java

License:Apache License

private static void setupDatabase() {
    MongoClient client = MongoClients.create();
    client.getDatabase("test").drop();

    MongoDatabase database = client.getDatabase("test");
    database.getCollection("items").drop();
    MongoCollection<Document> items = database.getCollection("items");

    Document document = new Document("sku", "111").append("name", "Peanuts").append("start", new Date());
    items.insertOne(document);//  ww  w.j  a  v  a2  s.  c  om
    client.close();
}

---

From source file:tour.PojoQuickTour.java

License:Apache License

/**
 * Run this main method to see the output of this quick example.
 *
 * @param args takes an optional single argument for the connection string
 *///from  w  w w .j  a v a 2s . c o m
public static void main(final String[] args) {
    MongoClient mongoClient;

    if (args.length == 0) {
        // connect to the local database server
        mongoClient = MongoClients.create();
    } else {
        mongoClient = MongoClients.create(args[0]);
    }

    // create codec registry for POJOs
    CodecRegistry pojoCodecRegistry = fromRegistries(MongoClientSettings.getDefaultCodecRegistry(),
            fromProviders(PojoCodecProvider.builder().automatic(true).build()));

    // get handle to "mydb" database
    MongoDatabase database = mongoClient.getDatabase("mydb").withCodecRegistry(pojoCodecRegistry);

    // get a handle to the "people" collection
    MongoCollection<Person> collection = database.getCollection("people", Person.class);

    // drop all the data in it
    collection.drop();

    // make a document and insert it
    Person ada = new Person("Ada Byron", 20, new Address("St James Square", "London", "W1"));
    System.out.println("Original Person Model: " + ada);
    collection.insertOne(ada);

    // Person will now have an ObjectId
    System.out.println("Mutated Person Model: " + ada);

    // get it (since it's the only one in there since we dropped the rest earlier on)
    Person somebody = collection.find().first();
    System.out.println(somebody);

    // now, lets add some more people so we can explore queries and cursors
    List<Person> people = asList(
            new Person("Charles Babbage", 45, new Address("5 Devonshire Street", "London", "W11")),
            new Person("Alan Turing", 28, new Address("Bletchley Hall", "Bletchley Park", "MK12")),
            new Person("Timothy Berners-Lee", 61, new Address("Colehill", "Wimborne", null)));

    collection.insertMany(people);
    System.out.println("total # of people " + collection.countDocuments());

    System.out.println("");
    // lets get all the documents in the collection and print them out
    Block<Person> printBlock = new Block<Person>() {
        @Override
        public void apply(final Person person) {
            System.out.println(person);
        }
    };

    collection.find().forEach(printBlock);

    System.out.println("");
    // now use a query to get 1 document out
    somebody = collection.find(eq("address.city", "Wimborne")).first();
    System.out.println(somebody);

    System.out.println("");
    // now lets find every over 30
    collection.find(gt("age", 30)).forEach(printBlock);

    System.out.println("");
    // Update One
    collection.updateOne(eq("name", "Ada Byron"), combine(set("age", 23), set("name", "Ada Lovelace")));

    System.out.println("");
    // Update Many
    UpdateResult updateResult = collection.updateMany(not(eq("zip", null)), set("zip", null));
    System.out.println(updateResult.getModifiedCount());

    System.out.println("");
    // Replace One
    updateResult = collection.replaceOne(eq("name", "Ada Lovelace"), ada);
    System.out.println(updateResult.getModifiedCount());

    // Delete One
    collection.deleteOne(eq("address.city", "Wimborne"));

    // Delete Many
    DeleteResult deleteResult = collection.deleteMany(eq("address.city", "London"));
    System.out.println(deleteResult.getDeletedCount());

    // Clean up
    database.drop();

    // release resources
    mongoClient.close();
}

---