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New to MongoDB? This talk will introduce the philosophy and features of MongoDB. We’ll discuss the benefits of the document-based data model that MongoDB offers by walking through how one can build a simple app to store books. We’ll cover inserting, updating, and querying the database of books. This session will jumpstart your knowledge of MongoDB development, providing you with context for the rest of the day's content.
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http://antwerkz.com @evanchooly
FIRST STEPS WITHMONGO
AND JAVAJUSTIN LEE
MEMBER OF TECHNICAL STAFF@ MONGODB.COM
WHAT IS MONGO?Name derives from "humongous" which mean bigIt is a scalable, high-performance, open source NoSQL databaseDocument orientedFully indexableReplication and HAMap Reduce and Aggregation frameworkGridFS
DOCUMENT ORIENTEDIn an RDBMS, one entity is typically mapped across multiplecells in one row of a table
sometimes multiple objects with embedded entitiesDocuments stored in json-style documents
actually BSON ( )BSON adds some "extra" information to documents, likelength prefixes, that make traversal efficient.
http://bsonspec.org
db.users.find().pretty()
WHAT DOES A DOCUMENT LOOK LIKE?
{"_id" : ObjectId("50fdb55a18c650918ee414be"),"className" : "com.antwerkz.mongo.model.User","firstName" : "Jules","lastName" : "Winnfield","email" : "[email protected]","addresses" : [ { "street" : "1858 N Vermont Ave", "city" : "Los Angeles", "state" : "CA", "zip" : "90027" }]}
COMPARISONSJAVA DRIVER
MORPHIA
https://www.mongodb.org/downloads
GETTING STARTED<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>
QUERIESdb.product_orders.find({ fulfilled : true, total : { $gte : 5000.0 }}).sort({total : 1})db.product_orders.find({ $or : [ { size : { $lte : 3 } }, { fulfilled : false} ] })
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()
= == > >= < <= != <> modin nin all exists elem size within near
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();
UPDATESdb.product_orders.update({ size : 3 }, { $set : { total : 400 } } )db.product_orders.update({}, { $push : { baubles : { color : "red" } }} )
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*/);
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);
CODE SAMPLES
LINKShttp://www.mongodb.org/https://github.com/mongodb/morphiahttps://github.com/evanchooly/mongo-java
http://antwerkz.com @evanchooly
FIRST STEPS WITHMONGO
AND JAVAJUSTIN LEE
MEMBER OF TECHNICAL STAFF@ MONGODB.COM
