Example usage for com.mongodb MongoClientSettings getDefaultCodecRegistry

Introduction

In this page you can find the example usage for com.mongodb MongoClientSettings getDefaultCodecRegistry.

Prototype

public static CodecRegistry getDefaultCodecRegistry() 

Source Link

Document

Gets the default codec registry.

Usage

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   ww w . ja  va2  s  .  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();
}

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