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Java EE 8 Application Development

Java EE 8 Application Development

By : David R. Heffelfinger
4.1 (9)
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Java EE 8 Application Development

Java EE 8 Application Development

4.1 (9)
By: David R. Heffelfinger

Overview of this book

Java EE is an Enterprise Java standard. Applications written to comply with the Java EE specification do not tie developers to a specific vendor; instead they can be deployed to any Java EE compliant application server. With this book, you’ll get all the tools and techniques you need to build robust and scalable applications in Java EE 8. This book covers all the major Java EE 8 APIs including JSF 2.3, Enterprise JavaBeans (EJB) 3.2, Contexts and Dependency Injection (CDI) 2.0, the Java API for WebSockets, JAX-RS 2.1, Servlet 4.0, and more. The book begins by introducing you to Java EE 8 application development and goes on to cover all the major Java EE 8 APIs. It goes beyond the basics to develop Java EE applications that can be deployed to any Java EE 8 compliant application server. It also introduces advanced topics such as JSON-P and JSON-B, the Java APIs for JSON processing, and the Java API for JSON binding. These topics dive deep, explaining how the two APIs (the Model API and the Streaming API) are used to process JSON data. Moving on, we cover additional Java EE APIs, such as the Java API for Websocket and the Java Message Service (JMS), which allows loosely coupled, asynchronous communication. Further on, you’ll discover ways to secure Java EE applications by taking advantage of the new Java EE Security API. Finally, you’ll learn more about the RESTful web service development using the latest JAX-RS 2.1 specification. You’ll also get to know techniques to develop cloud-ready microservices in Java EE.
Table of Contents (15 chapters)
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Query and path parameters

In our previous examples, we were working with a RESTful web service to manage a single customer object. In real life, this would obviously not be very helpful. A common case is to develop a RESTful web service to handle a collection of objects (customers, in our example). To determine which specific object in the collection we are working with, we can pass parameters to our RESTful web services. There are two types of parameters we can use, Query and Path parameters.

Query parameters

We can add parameters to methods that will handle HTTP requests in our web service. Parameters decorated with the @QueryParam annotation will be retrieved from the request URL.

The following example illustrates how to...

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Java EE 8 Application Development
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