Dev Jumpstart: Build Your First App with MongoDB
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The document provides an introduction to MongoDB, highlighting its features such as being a scalable NoSQL database that stores data in JSON-like documents. It includes examples of how to interface with MongoDB using Java, covering queries, updates, and sample code for setting up dependencies. Additionally, it offers resources and links for further learning on MongoDB and its Java driver.
![WHAT DOES A DOCUMENT LOOK LIKE?
db.users.find().pretty()
{ "_id" : ObjectId("50fdb55a18c650918ee414be"),
"className" : "com.antwerkz.mongo.model.User",
"firstName" : "Jules",
"lastName" : "Winnfield",
"email" : "jules@hotmail.com",
"addresses" : [
{
"street" : "1858 N Vermont Ave",
"city" : "Los Angeles",
"state" : "CA",
"zip" : "90027"
}
]}](https://image.slidesharecdn.com/mongoforjavadevelopers-141022114455-conversion-gate01/85/Dev-Jumpstart-Build-Your-First-App-with-MongoDB-4-320.jpg)
![QUERIES
db.product_orders.find({ fulfilled : true, total : { $gte : 5000.0 }
}).sort({total : 1})
db.product_orders.find({ $or : [ { size : { $lte : 3 } }, { fulfilled : false
} ] })](https://image.slidesharecdn.com/mongoforjavadevelopers-141022114455-conversion-gate01/85/Dev-Jumpstart-Build-Your-First-App-with-MongoDB-10-320.jpg)
![db.product_orders.find({ $or : [ { size : { $lte : 3 } }, { fulfilled : false } ]
})
BasicDBList list = new BasicDBList();
list.add(new BasicDBObject("fulfilled", false));
list.add(new BasicDBObject("size", new BasicDBObject("$lte", 3)));
DBCursor cursor = db.getCollection("product_orders")
.find(new BasicDBObject("$or", list));
while (cursor.hasNext()) {
orders.add(new ProductOrder(cursor.next()));
}
Query<ProductOrder> query = ds.createQuery(ProductOrder.class);
query.or(
query.criteria("fulfilled").equal(false),
query.criteria("size").lessThanOrEq(3)
);
return query.asList();](https://image.slidesharecdn.com/mongoforjavadevelopers-141022114455-conversion-gate01/85/Dev-Jumpstart-Build-Your-First-App-with-MongoDB-12-320.jpg)
Dev Jumpstart: Build Your First App with MongoDB
- 1. FIRST STEPS WITH MONGO AND JAVA JUSTIN LEE MEMBER OF TECHNICAL STAFF @ MONGODB.COM http://antwerkz.com @evanchooly
- 2. WHAT IS MONGO? Name derives from "humongous" which mean big It is a scalable, high-performance, open source NoSQL database Document oriented Fully indexable Replication and HA Map Reduce and Aggregation framework GridFS
- 3. DOCUMENT ORIENTED In an RDBMS, one entity is typically mapped across multiple cells in one row of a table sometimes multiple objects with embedded entities Documents stored in json-style documents http://bsonspec.org actually BSON ( ) BSON adds some "extra" information to documents, like length prefixes, that make traversal efficient.
- 4. WHAT DOES A DOCUMENT LOOK LIKE? db.users.find().pretty() { "_id" : ObjectId("50fdb55a18c650918ee414be"), "className" : "com.antwerkz.mongo.model.User", "firstName" : "Jules", "lastName" : "Winnfield", "email" : "jules@hotmail.com", "addresses" : [ { "street" : "1858 N Vermont Ave", "city" : "Los Angeles", "state" : "CA", "zip" : "90027" } ]}
- 8. COMPARISONS JAVA DRIVER MORPHIA
- 9. GETTING STARTED https://www.mongodb.org/downloads <dependency> <groupId>org.mongodb</groupId> <artifactId>mongo-java-driver</artifactId> <version>2.12.3</version> </dependency> <dependency> <groupId>org.mongodb.morphia</groupId> <artifactId>morphia</artifactId> <version>0.108</version> </dependency>
- 10. QUERIES db.product_orders.find({ fulfilled : true, total : { $gte : 5000.0 } }).sort({total : 1}) db.product_orders.find({ $or : [ { size : { $lte : 3 } }, { fulfilled : false } ] })
- 11. db.product_orders.find({ fulfilled : true, total : { $gte : 5000.0 } }).sort({total : 1}) BasicDBObject query = new BasicDBObject("fulfilled", true) .append("total", new BasicDBObject("$gte", 5000.0)); DBCursor cursor = db.getCollection(PRODUCT_ORDERS).find(query) .sort(new BasicDBObject("total", 1)); while (cursor.hasNext()) { orders.add(new ProductOrder(cursor.next())); } ds.createQuery(ProductOrder.class) .field("fulfilled").equal(true) .filter("total >=", 5000.0) // .field("total").greaterThanOrEq(5000.0) <-- can be done either way .order("total").asList() = == > >= < <= != <> mod in nin all exists elem size within near
- 12. db.product_orders.find({ $or : [ { size : { $lte : 3 } }, { fulfilled : false } ] }) BasicDBList list = new BasicDBList(); list.add(new BasicDBObject("fulfilled", false)); list.add(new BasicDBObject("size", new BasicDBObject("$lte", 3))); DBCursor cursor = db.getCollection("product_orders") .find(new BasicDBObject("$or", list)); while (cursor.hasNext()) { orders.add(new ProductOrder(cursor.next())); } Query<ProductOrder> query = ds.createQuery(ProductOrder.class); query.or( query.criteria("fulfilled").equal(false), query.criteria("size").lessThanOrEq(3) ); return query.asList();
- 13. UPDATES db.product_orders.update({ size : 3 }, { $set : { total : 400 } } ) db.product_orders.update({}, { $push : { baubles : { color : "red" } } } )
- 14. db.product_orders.update({ size : 3 }, { $set : { total : 400 } } ) BasicDBObject query = new BasicDBObject("size", 3); BasicDBObject update = new BasicDBObject("$set", new BasicDBObject("total", 400)); DBCollection collection = db.getCollection("product_orders"); collection.update(query, update/*, true/false, true/false*/); Query<ProductOrder> query = ds.createQuery(ProductOrder.class) .filter("size", 3); UpdateOperations<ProductOrder> update = ds.createUpdateOperations(ProductOrder.class) .set("total", 400); ds.update(query, update/* true/false for upsert*/); // ds.updateFirst(query, update/* true/false for upsert*/);
- 15. db.product_orders.update({}, { $push : { baubles : { color : "red" } } }, false, true ) BasicDBObject update = new BasicDBObject("$push", new BasicDBObject("baubles", new BasicDBObject("color", "red"))); db.getCollection(PRODUCT_ORDERS).update(new BasicDBObject(), update, false, true); UpdateOperations<ProductOrder> update = ds.createUpdateOperations(ProductOrder.class) .disableValidation() .add("baubles", new BasicDBObject("color", "red"), true); ds.update(ds.createQuery(ProductOrder.class), update, false);
- 16. CODE SAMPLES
- 17. LINKS http://www.mongodb.org/ https://github.com/mongodb/morphia https://github.com/evanchooly/mongo-java
- 18. FIRST STEPS WITH MONGO AND JAVA JUSTIN LEE MEMBER OF TECHNICAL STAFF @ MONGODB.COM http://antwerkz.com @evanchooly