Download PDF by Arun Gupta: Java EE 6 Pocket Guide

By Arun Gupta

ISBN-10: 144933668X

ISBN-13: 9781449336684

The Java firm variation 6 platform presents features that make it more uncomplicated for Java programmers to enhance and install company and internet functions. this useful consultant presents an summary of the most applied sciences within the Java EE 6 platform, together with huge easy-to-understand code samples that reveal many improvements.
Whether you’re conversant in Java EE five or a Java programmer imminent the firm variation for the 1st time, this publication will quick get you up to the mark on Java EE 6.
Discover how Java EE 6 offers a simplified developer event and improves at the developer productiveness good points brought in Java EE 5
Delve into Java EE 6 profiles, together with a complete profile for light-weight, standards-based sleek internet applications
Explore how the platform permits extensibility with open resource libraries and frameworks
Learn how standards comparable to Contexts & Dependency Injection, Java API for RESTful providers, and Servlets three make the platform extra robust.

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This requires an entity manager to be obtained from an entity manager factory in Java EE components that are not required to be threadsafe, such as servlets. The entity managers, together with their configuration information, the set of entities managed by the entity managers, and metadata that specifies mapping of the classes to the database, are packaged together as a persistence unit. ear, or application-client JAR. xml. ddl-generation" value="create-tables"/> In this code: • Persistence unit’s name is "MyPU".

The entity managers, together with their configuration information, the set of entities managed by the entity managers, and metadata that specifies mapping of the classes to the database, are packaged together as a persistence unit. ear, or application-client JAR. xml. ddl-generation" value="create-tables"/> In this code: • Persistence unit’s name is "MyPU". • transaction-type attribute’s value of JTA signifies that a JTA data source is provided.

40 | Chapter 4: Java Persistence API • Address is a POJO class that does not have a persistent identity of its own and exclusively belongs to the Student class. This class is called as an embeddable class and is identified by @Embedded on the field in the entity class and annotated with @Embeddable in the class definition: @Embeddable public class Address { private String street; private String city; private String zip; //. . } This allows the database structure to be more naturally mapped in Java.

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Java EE 6 Pocket Guide by Arun Gupta


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