Example usage for com.mongodb Mongo getDB

Introduction

In this page you can find the example usage for com.mongodb Mongo getDB.

Prototype

@Deprecated 
public DB getDB(final String dbName) 

Source Link

Document

Gets a database object.

Usage

From source file:org.einherjer.week2.samples.FieldSelectionSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("fieldSelectionSample");
    collection.drop();/*from w  ww . j  a  v  a2 s.  c o m*/
    Random rand = new Random();

    // insert 10 documents with two random integers
    for (int i = 0; i < 10; i++) {
        collection.insert(new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(100)).append("z",
                rand.nextInt(1000)));
    }

    DBObject query = QueryBuilder.start("x").is(0).and("y").greaterThan(10).lessThan(70).get();

    //use second find parameter to filter the returned fields
    DBCursor cursor = collection.find(query, new BasicDBObject("y", true).append("_id", false));
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

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From source file:org.einherjer.week2.samples.FindAndModifySample.java

License:Apache License

private static DBCollection createCollection() throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    return db.getCollection("findModifySample");
}

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From source file:org.einherjer.week2.samples.FindCriteriaSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("findCriteriaSample");
    collection.drop();//from   w ww.j a v a  2s. co  m

    // insert 10 documents with two random integers
    for (int i = 0; i < 10; i++) {
        collection
                .insert(new BasicDBObject("x", new Random().nextInt(2)).append("y", new Random().nextInt(100)));
    }

    //1- The query document can be created by using a QueryBuilder...
    QueryBuilder builder = QueryBuilder.start("x").is(0).and("y").greaterThan(10).lessThan(70);
    //2- or, the query document can be created manually
    DBObject query = new BasicDBObject("x", 0).append("y", new BasicDBObject("$gt", 10).append("$lt", 90));

    System.out.println("\nCount:");
    long count = collection.count(builder.get());
    System.out.println(count);

    System.out.println("\nFind all: ");
    DBCursor cursor = collection.find(builder.get());
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

---

From source file:org.einherjer.week2.samples.FindSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("findSample");
    collection.drop();//w  w w. ja v  a  2s.c o m

    // insert 10 documents with a random integer as the value of field "x"
    for (int i = 0; i < 10; i++) {
        collection.insert(new BasicDBObject("x", new Random().nextInt(100)));
    }

    System.out.println("Find one:");
    DBObject one = collection.findOne();
    System.out.println(one);

    System.out.println("\nFind all: ");
    DBCursor cursor = collection.find();
    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }

    System.out.println("\nCount:");
    long count = collection.count();
    System.out.println(count);
}

---

From source file:org.einherjer.week2.samples.InsertSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB courseDB = client.getDB("course");
    DBCollection collection = courseDB.getCollection("insertSample");

    collection.drop();//from  w w  w . j a va2 s  .  c  o  m

    DBObject doc = new BasicDBObject().append("x", 1);
    System.out.println(doc);
    collection.insert(doc);
    System.out.println(doc); //_id field gets generated

    DBObject doc2 = new BasicDBObject("_id", new ObjectId()).append("x", 1);
    System.out.println(doc2);
    collection.insert(doc2);
    System.out.println(doc2); //same as doc1

    DBObject doc3 = new BasicDBObject("_id", "123").append("x", 1);
    System.out.println(doc3);
    collection.insert(doc3);
    System.out.println(doc3); //_id field set by to a type different than ObjectId

    collection.insert(doc); //duplicate exception

}

---

From source file:org.einherjer.week2.samples.SortSkipLimitSample.java

License:Apache License

public static void main(String[] args) throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection lines = db.getCollection("sortSkipLimitSample");
    lines.drop();/*  w  w w  . j  ava  2 s . co m*/
    Random rand = new Random();

    // insert 10 lines with random start and end points
    for (int i = 0; i < 10; i++) {
        lines.insert(new BasicDBObject("_id", i)
                .append("start", new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(90) + 10))
                .append("end", new BasicDBObject("x", rand.nextInt(2)).append("y", rand.nextInt(90) + 10)));
    }

    DBCursor cursor = lines.find().sort(new BasicDBObject("start.x", 1).append("start.y", -1)).skip(2)
            .limit(10);

    try {
        while (cursor.hasNext()) {
            DBObject cur = cursor.next();
            System.out.println(cur);
        }
    } finally {
        cursor.close();
    }
}

---

From source file:org.einherjer.week2.samples.UpdateRemoveSample.java

License:Apache License

private static DBCollection createCollection() throws UnknownHostException {
    Mongo client = new Mongo();
    DB db = client.getDB("course");
    DBCollection collection = db.getCollection("updateRemoveSample");
    collection.drop();//w w  w. j a v  a2s .co m
    return collection;
}

---

From source file:org.elasticsearch.river.mongodb.RiverMongoDBTestAbstract.java

License:Apache License

private void initMongoInstances(ExecutableType type) throws Exception {
    logger.debug("*** initMongoInstances(" + type + ") ***");
    CommandResult cr;//from  w ww . j  a  va 2 s .com
    Settings rsSettings = settings.getByPrefix(type.configKey + '.');
    int[] ports;
    if (rsSettings.getAsBoolean("useDynamicPorts", false)) {
        ports = new int[] { Network.getFreeServerPort(), Network.getFreeServerPort(),
                Network.getFreeServerPort() };
    } else {
        int start = 37017 + 10 * type.ordinal();
        ports = new int[] { start, start + 1, start + 2 };
    }
    String replicaSetName = "es-test-" + type.configKey;
    // Create 3 mongod processes
    Starter<IMongodConfig, MongodExecutable, MongodProcess> starter = type.newStarter();
    ImmutableList.Builder<MongoReplicaSet.Member> builder = ImmutableList.builder();
    for (int i = 1; i <= 3; ++i) {
        Storage storage = new Storage("target/" + replicaSetName + '/' + i, replicaSetName, 20);
        MongoReplicaSet.Member member = new MongoReplicaSet.Member();
        member.config = new MongodConfigBuilder()
                .version(Versions.withFeatures(new GenericVersion(rsSettings.get("version"))))
                .net(new de.flapdoodle.embed.mongo.config.Net(ports[i - 1], Network.localhostIsIPv6()))
                .replication(storage).build();
        logger.trace("replSetName in config: {}", member.config.replication().getReplSetName());
        member.executable = starter.prepare(member.config);
        member.process = member.executable.start();
        member.address = new ServerAddress(Network.getLocalHost().getHostName(), member.config.net().getPort());
        logger.debug("Server #" + i + ": {}", member.address);
        builder.add(member);
    }
    ImmutableList<MongoReplicaSet.Member> members = builder.build();
    Thread.sleep(2000);
    MongoClientOptions mco = MongoClientOptions.builder().autoConnectRetry(true).connectTimeout(15000)
            .socketTimeout(60000).build();
    Mongo mongo = new MongoClient(new ServerAddress(Network.getLocalHost().getHostName(), ports[0]), mco);
    DB mongoAdminDB = mongo.getDB(ADMIN_DATABASE_NAME);

    cr = mongoAdminDB.command(new BasicDBObject("isMaster", 1));
    logger.debug("isMaster: " + cr);

    // Initialize replica set
    cr = mongoAdminDB.command(new BasicDBObject("replSetInitiate",
            (DBObject) JSON.parse("{'_id': '" + replicaSetName + "', 'members': [" + "{'_id': 0, 'host': '"
                    + members.get(0).address.getHost() + ':' + members.get(0).address.getPort() + "'}, "
                    + "{'_id': 1, 'host': '" + members.get(1).address.getHost() + ':'
                    + members.get(1).address.getPort() + "'}, " + "{'_id': 2, 'host': '"
                    + members.get(2).address.getHost() + ':' + members.get(2).address.getPort()
                    + "', 'arbiterOnly' : true}]} }")));
    logger.debug("replSetInitiate result: " + cr);

    Thread.sleep(5000);
    cr = mongoAdminDB.command(new BasicDBObject("replSetGetStatus", 1));
    logger.trace("replSetGetStatus result: {}", cr);

    // Check replica set status before to proceed
    while (!isReplicaSetStarted(cr)) {
        logger.debug("Waiting 3 seconds for replicaset to change status...");
        Thread.sleep(3000);
        cr = mongoAdminDB.command(new BasicDBObject("replSetGetStatus", 1));
        // logger.debug("replSetGetStatus: " + cr);
    }

    mongo.close();
    mongo = null;

    // Initialize a new client using all instances.
    List<ServerAddress> mongoServers = new ArrayList<ServerAddress>();
    for (MongoReplicaSet.Member member : members) {
        mongoServers.add(member.address);
    }
    mongo = new MongoClient(mongoServers, mco);
    Assert.assertNotNull(mongo);
    mongo.setReadPreference(ReadPreference.secondaryPreferred());
    mongo.setWriteConcern(WriteConcern.REPLICAS_SAFE);
    replicaSets.put(type, new MongoReplicaSet(type, rsSettings.get("version"), mongo, mongoAdminDB, members));
}

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From source file:org.eobjects.analyzer.connection.MongoDbDatastore.java

License:Open Source License

@Override
protected UsageAwareDatastoreConnection<UpdateableDataContext> createDatastoreConnection() {
    try {/*from   w w w . j  a  v  a 2 s.  c  o m*/
        Mongo mongo = new Mongo(_hostname, _port);
        DB mongoDb = mongo.getDB(_databaseName);
        if (_username != null && _password != null) {
            boolean authenticated = mongoDb.authenticate(_username, _password);
            if (!authenticated) {
                logger.warn("Autheticate returned false!");
            }
        }

        final UpdateableDataContext dataContext;
        if (_tableDefs == null || _tableDefs.length == 0) {
            dataContext = new MongoDbDataContext(mongoDb);
        } else {
            dataContext = new MongoDbDataContext(mongoDb, _tableDefs);
        }
        return new UpdateableDatastoreConnectionImpl<UpdateableDataContext>(dataContext, this);
    } catch (Exception e) {
        if (e instanceof RuntimeException) {
            throw (RuntimeException) e;
        }
        throw new IllegalStateException("Failed to connect to MongoDB instance: " + e.getMessage(), e);
    }
}

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From source file:org.eobjects.analyzer.storage.MongoDbStorageProvider.java

License:Open Source License

@Override
public RowAnnotationFactory createRowAnnotationFactory() {
    try {/*w w  w. j  a  v a2 s .c o  m*/
        Mongo mongo = new Mongo();
        DB db = mongo.getDB("analyzerbeans");
        String name = "rowannotationfactory" + id.getAndIncrement();
        DBCollection collection = db.createCollection(name, null);

        // drop the collection in case it already exists
        collection.drop();
        collection = db.createCollection(name, null);

        return new MongoDbRowAnnotationFactory(collection);
    } catch (Exception e) {
        throw new IllegalStateException(e);
    }
}

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