java persistence-nosql to html5 · 4 beyond relational and java persistence: from nosqlnosql to...
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1 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 1 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Java Persistence: From NoSQL to HTML5
Shaun Smith (@shaunMsmith) Senior Principal Product Manager/Eclipse Committer
2 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 2 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
About Me
§ Shaun Smith – Eclipse committer on EclipseLink and related projects – Oracle TopLink Product Manager – OO developer since 1987
§ “Old guy who knows Smalltalk” ;-)
3 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 3 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
EclipseLink Project
§ Object-Relational: Java Persistence API (JPA) – JPA 1.0 part of EJB 3.0 standard (JSR 220) – JPA 2.0 standardized in JSR 317 – EclipseLink is JPA 2.0 & 2.1 Reference Implementation
§ Object-XML/JSON: Java Architecture for XML Binding (JAXB) – JAXB 2.2 Certified Implementation
www.eclipse.org/eclipselink
4 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 4 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Agenda—Database to Browser (and back again) Browser
HTTP / REST
Binding Persistence XML/JSON
Java
Database Persistence Relational/NoSQL
Relational DB | NoSQL DB
5 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 5 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Agenda Browser
HTTP / REST
Binding Persistence XML/JSON
Java
Database Persistence Relational/NoSQL
Relational DB | NoSQL DB
6 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 6 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
NoSQL Databases
§ EclipseLink is best known for relational persistence but… § NoSQL databases are increasingly popular § No common definition (document, graph, columnar)
– Differing feature sets – Some offer query language/API—some not
§ No standards § Every database offers a unique API
– Cost in terms of learning each database – Zero portability across databases
7 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 7 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
EclipseLink NoSQL
§ Support JPA-style access to NoSQL databases – Leverage non-relational database support for JCA (and JDBC when
available)
§ Define annotations and XML to identify NoSQL stored entities (e.g., @NoSQL)
§ Support JPQL subset for each – Key principal: leverage what’s available
§ Initial support for MongoDB and Oracle NoSQL
8 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 8 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Applicability of JPA to NoSQL
§ Core JPA concepts apply to NoSQL: – Persistent Entities, Embeddables, ElementCollection, OneToOne,
OneToMany, ManyToOne, Version, etc.
§ Some concepts apply with some databases: – JPQL, NamedNativeQuery
§ Pure relational concepts don’t apply: – CollectionTable, Column, SecondaryTable,
SequenceGenerator, TableGenerator, etc.
9 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 9 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Querying NoSQL with JPA
§ Two kinds of queries – JQPL—portable query language defined by the spec – Native query—lets you leverage database specific features – Dynamic or static @NamedQuery
§ JPQL translated to underlying database query framework.
10 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 10 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Example MongoDB Mapped Entity
11 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 11 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
MongoDB Query Examples
§ JPQL Select o from Order o where o.totalCost > 1000
Select o from Order o join o.orderLines l where l.cost > :cost
§ Native Queries query = em.createNativeQuery( "db.ORDER.findOne({\"_id\":\"" + oid + "\"})", Order.class);
Order order = (Order) query.getSingleResult();
12 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 12 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Demo EclipseLink NoSQL
13 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 13 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
“…we are gearing up for a shift to polyglot persistence - where any decent sized enterprise will have a variety of different data storage technologies for different kinds of data…we'll be first asking how we want to manipulate the data and only then figuring out what technology is the best bet for it..”
Martin Fowler ThoughtWorks
14 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 14 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Composite Persistence Unit Composite PU
Relational PU NoSQL PU
15 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 15 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Demo Polyglot Persistence
http:/git.eclipse.org/gitroot/eclipselink/examples.git/jpa/polyglot
16 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 16 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Agenda Browser
HTTP / REST
Binding Persistence XML/JSON
Java
Database Persistence Relational/NoSQL
Relational DB | NoSQL DB
17 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 17 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Binding Persistence
§ EclipseLink implements – JAXB for Java/XML binding—covert Java to/from XML – Java/JSON binding—convert Java to/from JSON
§ Currently no Java/JSON binding standard – Java API for JSON Processing (JSR 535) is parsing, not binding
§ EclipseLink interprets JAXB XML bindings for JSON – Content-type selectable by setting property on Marshaller/Unmarshaller
XML and JSON Binding
18 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 18 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
XML and JSON from JAXB Mappings
{ "phone-numbers" : [ { "id" : 2, "num" : "512-555-9999", "type" : "mobile" } ], "address" : { "city" : "New York", "id" : 1, "street" : "Central Park East" }, "firstName" : "Woody", "id" : 1, "lastName" : “Allen" }
<?xml version="1.0" encoding="UTF-8"?> <customer> <phone-numbers> <phone-number> <id>2</id> <num>512-555-1234</num> <type>home</type> </phone-number> </phone-numbers> <address> <city>New York</city> <id>1</id> <street>Central Park East</street> </address> <firstName>Bill</firstName> <id>1</id> <lastName>Allen</lastName> </customer>
19 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 19 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Challenges – Binding JPA Entities to XML/JSON
• Bidirectional/Cyclical Relationships • Composite Keys/Embedded Key Classes • Byte Code Weaving
<customer> <phone-numbers> <phone-number> <id>1</id> ... <type>mobile</type> </phone-number> </phone-numbers> </customer>
JPA JAXB
20 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 20 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Bidirectional Relationship @Entity public class Customer{ ... @OneToMany(mappedBy="owner") private List<Phone> phones;
}
@Entity public class Phone{ ... @ManyToOne private Customer owner;
}
21 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 21 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Bidirectional Relationships in JAXB
§ JAXB specification does not support bidirectional relationships. One side must be marked @XmlTransient.
§ But that loses the relationship!
Customer Phone
<customer> <phone-numbers> <phone-number> <id>1</id> ... <type>mobile</type> </phone-number> </phone-numbers> </customer>
Marshall
Customer Phone
Unmarshall
X owner
phones phones
22 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 22 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
EclipseLink XmlInverseReference @Entity public class Customer{ ... @OneToMany(mappedBy=“owner") private List<Phone> phones;
}
@Entity public class Phone{ ... @ManyToOne @XmlInverseReference(mappedBy=“phones") private Customer owner;
}
23 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 23 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
EclipseLink XmlInverseReference
§ EclipseLink restores relationships on unmarshall!
<customer> <phone-numbers> <phone-number> <id>1</id> ... <type>mobile</type> </phone-number> </phone-numbers> </customer> Marshall
Customer Phone
owner
phones
Unmarshall
Customer Phone
owner
project
24 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 24 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Demo JAXB/JPA Fidelity JSON Binding
http:/git.eclipse.org/gitroot/eclipselink/examples.git/jpa-moxy/jpa-moxy.simple
25 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 25 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Agenda Browser
HTTP / REST
Binding Persistence XML/JSON
Java
Database Persistence Relational/NoSQL
Relational DB | NoSQL DB
26 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 26 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
JPA-RS Browser
JAX-RS / JPA-RS
Binding Persistence XML/JSON
Java
Database Persistence Relational/NoSQL
Relational DB | NoSQL DB
HTTP
27 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 27 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Example: GET Entity with JAX-RS @Path("/invoice")
@Stateless
public class InvoiceService {...
@GET
@Path("{id}")
@Produces({"application/xml", "application/json"})
public Invoice read(@PathParam("id") int id) {
return entityManager.find(Invoice.class, id);
}
... GET http://[machine]:[port]/[web-context]/invoice/4
28 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 28 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
JPA-RS
JPA-RS
JAX-RS
Accounting PU Human Resources PU Contracting PU
...
JPA
GET http://.../persistence/Accounting/Invoice/...
JPA-RS maps URI http://.../persistence/Accounting/Invoice/... to Accounting PU and Invoice entity
JAX-RS http://.../persistence/Accounting/Invoice/... mapped to JPA-RS service
29 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 29 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
JPA-RS Features § Access relational data through REST with JSON or XML § Provides REST operations for entities in persistence unit (GET, PUT,
POST, DELETE) § Automatic generation of XML and JSON bindings § Supports invocation of named queries via HTTP § Server Caching—EclipseLink clustered cache § Dynamic Persistence also supported
– Entities defined via metadata—no Java classes required – Enables persistence services for HTML 5/JavaScript applications
30 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 30 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Resource Model
JPA Entity Model
Resource Model
31 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 31 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Resource Model & Links { "firstName": "Frank", "gender": "Male", "id": 1, "lastName": "Smith", "responsibilities": [], "salary": 1, "version": 13, "address": { "_link": { "href": "http://localhost:7001/employee.web-js/persistence/employee/entity/Address/18", "method": "GET", "rel": "self" } }, …
32 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 32 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Demo EclipseLink JPA-RS
http:/git.eclipse.org/gitroot/eclipselink/examples.git/jpa/employee
33 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 33 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
TopLink Data Services
§ Provides Data Change Notification API – Supports use of
§ WebSockets § Server Sent Events § JMS § …
§ Leverages Oracle QCN/DCN (Query/Data Change Notification)
Adding Push Notification to JPA-RS
34 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 34 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Demo TopLink Data Services
35 Beyond Relational and NoSQL to Polyglot and HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License 35 Java Persistence: From NoSQL to HTML5 | © 2013 Oracle and AGETO; Licensed under a Creative Commons Attribution-Share Alike 3.0 Unported License
Summary
§ Java application needs are changing—and EclipseLink is evolving too! § Support for NoSQL and Polyglot Persistence § Support for building apps that go from Database to Browser
– JSON Binding – JAXB/JPA Fidelity – JPA-RS automating RESTful persistence service
§ EclipseLink JPA-RS simplifies Java EE 7 HTML5/Thin Server Architecture applications
§ TopLink Data Services adds push notification to JPA-RS