Book Image

Java: High-Performance Apps with Java 9

By : Mayur Ramgir
Book Image

Java: High-Performance Apps with Java 9

By: Mayur Ramgir

Overview of this book

Java 9 which is one of the most popular application development languages. The latest released version Java 9 comes with a host of new features and new APIs with lots of ready to use components to build efficient and scalable applications. Streams, parallel and asynchronous processing, multithreading, JSON support, reactive programming, and microservices comprise the hallmark of modern programming and are now fully integrated into the JDK. This book focuses on providing quick, practical solutions to enhance your application's performance. You will explore the new features, APIs, and various tools added in Java 9 that help to speed up the development process. You will learn about jshell, Ahead-of-Time (AOT) compilation, and the basic threads related topics including sizing and synchronization. You will also explore various strategies for building microservices including container-less, self-contained, and in-container. This book is ideal for developers who would like to build reliable and high-performance applications with Java. This book is embedded with useful assessments that will help you revise the concepts you have learned in this book. This book is repurposed for this specific learning experience from material from Packt's Java 9 High Performance by Mayur Ramgir and Nick Samoylov
Table of Contents (9 chapters)
Java: High-Performance Apps with Java 9
Credits
Preface

Stack-Walking APIs


Exceptions do happen, especially during development or the period of software stabilization. But in a big complex system, the chance of getting an exception is possible even in production, especially when several third-party systems are brought together and the need arises to analyze the stack trace programmatically in order to apply an automatic correction. In this section, we will discuss how it can be done.

Stack Analysis before Java 9

The traditional reading of the stack trace, using objects of the java.lang.Thread and java.lang.Throwableclasses, was accomplished by capturing it from the standard output. For example, we can include this line in any section of the code:

Thread.currentThread().dumpStack();

The previous line will produce the following output:

Similarly, we can include this line in the code:

new Throwable().printStackTrace();

The output will then look like this:

This output can be captured, read, and analyzed programmatically, but requires quite a bit of custom...