RESTful Data Access Services with Java EE

Getting a Good REST (Service) on the Run(time) Shaun Smith Principal Product Manager, Oracle TopLink EclipseLink and Gemini Committer

Java Persistence: The Problem Space JAXB : Java Architecture for XML Binding <customer id=“…”> <name>…</name> … </contact-info> </customer> XML JPA : Java Persistence API CUST ID NAME C_RATING Relational Customer id: int name: String creditRating: int Java JPA JAXB DBWS

Use Case – Data Access Service ,[object Object],[object Object],[object Object],[object Object],Data Access Service Data Source XML JSON Objects JPA JAXB JAXB

What is REST? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is JAX-RS? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

REST Service – Read (GET) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],Relational Database JAX-RS EclipseLink JPA EclipseLink JAXB XML Document

REST Service – Create (POST) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

REST Service – Update (PUT) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

REST Service – Delete (DELETE) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Java Persistence API (JPA) & JAXB @XmlRootElement @Entity public class Customer { @XmlAttribute @Id public int getId() {…} public void setId(int id) {…} @XmlElement(name=“billing-address”) @OneToOne @JoinColumn(name="ADDR_ID") public Address getBillingAddress() {…} public void setBillingAddress(Address address) {…} } Combining JAXB and JPA Annotations

Pain Points – Mapping JPA Entities to XML ,[object Object],[object Object]

Pain Points – Bidirectional Relationships ,[object Object],[object Object],[object Object]

Pain Points – Shared References ,[object Object],[object Object]

Pain Points – Embedded Key Classes ,[object Object],[object Object]

Pain Points – Composite Keys ,[object Object],[object Object],[object Object]

For More Information ,[object Object],[object Object],[object Object],[object Object]

RESTful Data Access Services with Java EE

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RESTful Data Access Services with Java EE