In this tutorial we are going to learn how to instrument Java code to expose application metrics using JMX monitoring. Following the code examples, you can monitor the availability, health and performance of your Java application. Java 1.5 introduced JMX – Java Management eXtensions – which is a standard way to instrument code in the JRE world.
Ensuring your apps work as designed and deliver a productive user experience starts with monitoring applications metrics. This helps you understand whether your software is performing at optimal levels. Many developers use JBoss (now called WildFly and maintained by Red Hat) to build, deploy, and host transactional applications written in Java.
The performance of any application is measured by its availability and responsiveness. When an application is slow, IT operations staff must troubleshoot the cause of slowness, identify it and resolve it. While application performance problems may be caused by issues in the supporting infrastructure, often the issues are related to the application components themselves.
Logging your Java applications is essential to getting visibility into application performance and troubleshooting problems. But, with a variety of available libraries and configuration options, getting started logging in Java can be challenging.
Java programs running on JVM create objects on the heap. At some stage, these objects are no longer used and can pile up as “garbage” needlessly taking up memory. Replacing the manual process of explicitly allocating and freeing memory, the Java Garbage Collection process was designed to take care of this problem automatically.
Oracle will soon roll out Java 12 in March 2019 and new releases will drop once every six months thereafter. The goal is to make new releases more frequent for the Java ecosystem, with certain releases earmarked as long-term support (LTS). And by support, we mean the allocation of update releases for bug fixes and critical security patches. This latest version offers a list of new features such as Switch Expressions, Default CDS Archives, Shenandoah, Microbenchmark Suite, among others.
According to Oracle, Java is a fast, secure and reliable programming language and computing platform first released by Sun Microsystems in 1995. There are lots of applications and websites that will not work unless Java is installed, and more are created every day. From laptops to datacenters, game consoles to scientific supercomputers, cell phones to the Internet, Java is everywhere.
This is the story of a Java debugging journey that started with a question I couldn’t answer about Java stack traces. As a long time Java programmer, I am approached for help by developers who encounter unusual problems in the language.
Apache Tomcat is a server for Java-based web applications, developed by the Apache Software Foundation. The Tomcat project’s source was originally created by Sun Microsystems and donated to the foundation in 1999. Tomcat is one of the more popular server implementations for Java web applications and runs in a Java Virtual Machine (JVM).
