Getting a Good REST (Service) on the Run(time
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This document discusses using JAX-RS and JPA to build RESTful web services. It provides an overview of REST principles and JAX-RS, and shows how the HTTP methods map to CRUD operations in JPA. Some challenges in mapping JPA entities to XML are also outlined, such as bidirectional relationships and composite keys.
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Getting a Good REST (Service) on the Run(time
- 1. Getting a Good REST (Service) on the Run(time) Shaun Smith Principal Product Manager, Oracle TopLink EclipseLink and Gemini Committer
- 2. 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
- 10. 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
Hinweis der Redaktion
- Java Applications need to either access existing data sources like relational database or interact with other systems via XML—or BOTH. The example is a trivial one but it can get very complicated to map between an Java object model and a relational or XML schema.