Support of MongoDB for Java

CAST supports MongoDB via its com.castsoftware.nosqljava extension. Details about the support provided for Java source code is discussed below.

Supported Libraries

Library	Version	Supported
Jongo	Up to: 1.4.0
Mongo Java Driver	Up to: 3.12.8
Mongo Jack	Up to: 4.11.0
Mongo Java Sync Driver	Up to: 5.0.0
Morphia	Up to: 1.3.2

Supported Operations

Operation	Methods supported
Insert	com.mongodb.DBCollection.insert com.mongodb.client.MongoCollection.insertOne com.mongodb.client.MongoCollection.insertMany com.mongodb.client.MongoCollection.bulkWrite com.mongodb.DBCollection.save org.jongo.MongoCollection.insert org.jongo.MongoCollection.save org.mongojack.JacksonMongoCollection.insert org.mongojack.MongoCollectionDecorator.insertMany org.mongojack.MongoCollectionDecorator.insertOne com.mongodb.client.MongoCollection.bulkWrite com.mongodb.DBCollection.save org.jongo.MongoCollection.insert org.jongo.MongoCollection.save com.mongodb.DBCollection.replaceOrInsert com.mongodb.DBCollection.setHintFields com.mongodb.DBCollection.executeWriteOperation com.mongodb.DBCollection.executeBulkWriteOperation com.mongodb.BulkWriteOperation.execute
Select	com.mongodb.client.MongoDatabase.getCollection com.mongodb.client.MongoCollection.countDocuments com.mongodb.client.MongoCollection.count com.mongodb.client.MongoCollection.find com.mongodb.client.MongoCollection.findOneAndDelete com.mongodb.client.MongoCollection.findOneAndReplace com.mongodb.client.MongoCollection.findOneAndUpdate com.mongodb.DB.getCollection com.mongodb.DBCollection.aggregate com.mongodb.DBCollection.count com.mongodb.DBCollection.distinct com.mongodb.DBCollection.find com.mongodb.DBCollection.findOne com.mongodb.DBCollection.getCollection com.mongodb.DBCollection.getCount com.mongodb.DBCollection.getName com.mongodb.DBCollection.group com.mongodb.DBCollection.findAndModify com.mongodb.DBCollection.findAndRemove org.jongo.Jongo.getCollection org.jongo.MongoCollection.aggregate org.jongo.MongoCollection.count org.jongo.MongoCollection.distinct org.jongo.MongoCollection.find org.jongo.MongoCollection.findAndModify org.jongo.MongoCollection.findOne org.jongo.MongoCollection.getDBCollection org.jongo.MongoCollection.getName org.mongojack.JacksonMongoCollection.findOne org.mongojack.JacksonMongoCollection.findOneById rg.mongojack.JacksonMongoCollection.getCollectionKey org.mongojack.JacksonMongoCollection.getName org.mongojack.JacksonMongoCollection.getMongoCollection org.mongojack.MongoCollectionDecorator.countDocuments org.mongojack.MongoCollectionDecorator.estimatedDocumentCount org.mongojack.MongoCollectionDecorator.find org.mongojack.MongoCollectionDecorator.findOneAndDelete org.mongojack.MongoCollectionDecorator.findOneAndReplace org.mongojack.MongoCollectionDecorator.findOneAndUpdate com.mongodb.DBCollection.getFullName com.mongodb.DBCollection.getHintFields com.mongodb.DBCollection.getDefaultDBObjectCodec com.mongodb.client.MongoCollection.aggregate com.mongodb.client.MongoCollection.watch
Delete	com.mongodb.client.MongoCollection.drop com.mongodb.client.MongoCollection.deleteOne com.mongodb.client.MongoCollection.deleteMany com.mongodb.client.MongoCollection.findOneAndDelete com.mongodb.DBCollection.drop com.mongodb.DBCollection.dropIndex com.mongodb.DBCollection.findAndRemove org.jongo.MongoCollection.drop org.jongo.MongoCollection.dropIndex org.jongo.MongoCollection.dropIndexes org.jongo.MongoCollection.remove org.mongojack.JacksonMongoCollection.removeById org.mongojack.JacksonMongoCollection.drop org.mongojack.MongoCollectionDecorator.deleteMany org.mongojack.MongoCollectionDecorator.deleteOne org.mongojack.MongoCollectionDecorator.drop org.mongojack.MongoCollectionDecorator.dropIndex org.mongojack.MongoCollectionDecorator.dropIndexes org.mongojack.MongoCollectionDecorator.findOneAndDelete
Update	com.mongodb.client.MongoCollection.updateOne com.mongodb.client.MongoCollection.updateMany com.mongodb.client.MongoCollection.findOneAndReplace com.mongodb.client.MongoCollection.findOneAndUpdate org.jongo.MongoCollection.update com.mongodb.DBCollection.update com.mongodb.DBCollection.updateMulti com.mongodb.DBCollection.findAndModify com.mongodb.client.MongoCollection.replaceOne org.mongojack.JacksonMongoCollection.replaceOne org.mongojack.MongoCollectionDecorator.findOneAndReplace org.mongojack.MongoCollectionDecorator.findOneAndUpdate org.mongojack.MongoCollectionDecorator.renameCollection org.mongojack.MongoCollectionDecorator.replaceOne org.mongojack.MongoCollectionDecorator.updateMany org.mongojack.MongoCollectionDecorator.updateOne com.mongodb.client.MongoCollection.renameCollection

Objects

Icon	Description
	Java MongoDB database
	Java MongoDB collection
	Java unknown MongoDB database
	Java unknown MongoDB collection

Links

Link type	Source and destination of link	Methods supported
belongsTo	From Java MongoDB collection object to Java MongoDB database object	-
useLink	Between the caller Java Method objects (constructors also) and Java Mongo Collection Object	mapReduce createCollection
useSelectLink	Between the caller Java Method objects (constructors also) and Java Mongo Collection Object	getCollection countDocuments find count findOneAndDelete findOneandReplace findOneAndUpdate aggregate distinct findOne getCount getName group findAndModify findAndRemove
useUpdateLink	Between the caller Java Method objects (constructors also) and Java Mongo Collection Object	update updateOne updateMany findOneAndUpdate fineOneAndReplace findAndModify rename replaceOne
useDeleteLink	Between the caller Java Method objects (constructors also) and Java Mongo Collection Object	findOneAndDelete drop deleteOne deleteMany dropIndex dropIndexes remove findAndRemove
useInsertLink	Between the caller Java Method objects (constructors also) and Java Mongo Collection Object	insert insertOne insertMany bulkWrite save

Amazon DocumentDB Identification

The below mentioned objects have properties to indicate whether the object is of type MongoDB or Amazon DocumentDB:

Java MongoDB collection object

Property Description	Type of Property Value	Value: Meaning
Is an Amazon DocumentDB collection?	Integer	1: The collection object is of type Amazon DocumentDB 0: The collection object is of type MongoDB

Is an Amazon DocumentDB collection?

Integer

1: The collection object is of type Amazon DocumentDB

0: The collection object is of type MongoDB

Java unknown MongoDB collection object

Property Description	Type of Property Value	Value: Meaning
Is an Amazon DocumentDB collection?	Integer	1: The collection object is of type Amazon DocumentDB 0: The collection object is of type MongoDB

Is an Amazon DocumentDB collection?

Integer

1: The collection object is of type Amazon DocumentDB

0: The collection object is of type MongoDB

What results can you expect?

Some example scenarios are shown below:

Creation of Database and Collection

public MongoUserDAO(DB db) {
        Mongo mongo = new Mongo();
        db = mongo.getDB("TestDatabase");
        db.createCollection("User", dbo);
}

Insert Operation

public void insertDocuments(DBObject[] documents) {
        userCol.insert(documents);  
    }

Select Operation

public void getCollection() {
        DBCollection col =  db.getCollection("User");
    }

Update Operation

public void updateDoc(DBObject query, DBObject update) {
        userCol.update(query, update);
    }

Delete Operation

Amazon DocumentDB Identification

package com.sample.app;
 
import com.mongodb.MongoClient;
import com.mongodb.MongoClientURI;
import com.mongodb.ServerAddress;
import com.mongodb.MongoException;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoCollection;
import org.bson.Document;
 
 
public final class App {
    private App() {
    }
    public static void main(String[] args) {
 
        String connectionString = "mongodb://root:rootroot@sample-cluster.cluster-cqjaxx9hbhi0.us-west-2.docdb.amazonaws.com:27017/?replicaSet=rs0&readpreference=secondaryPreferred";
 
        MongoClientURI clientURI = new MongoClientURI(connectionString);
        MongoClient mongoClient = new MongoClient(clientURI);
 
        MongoDatabase testDB = mongoClient.getDatabase("library");
        MongoCollection<Document> numbersCollection = testDB.getCollection("books");
 
        Document doc = new Document("name", "title").append("value", "Harry Potter");
        numbersCollection.insertOne(doc);
 
        MongoCursor<Document> cursor = numbersCollection.find().iterator();
        try {
            while (cursor.hasNext()) {
                System.out.println(cursor.next().toJson());
            }
        } finally {
            cursor.close();
        }
 
    }
}

Known Limitations

For the method ‘mapReduce’ the type of link produced is ‘useLink’ as its type is not determined
If collection name is not resolved in the CRUD API, then link is created with unknown collection object.
Setting of properties related to Amazon DocumentDB identification depends on proper resolution of connection string.