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Develop with real-time Java

Create applications with predictable response times

Date:  07 Oct 2011 (Published 02 Jun 2011) |Level: Advanced ||

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1. Why real-time Java?

Runtime processes (garbage collection, class loading, Just-in-time compilation, and thread scheduling) in conventional Java virtual machines (JVMs) make them incapable of running applications with real-time behavior. Real-time extensions to Java technology—based on the Real-time Specification for Java (RTSJ)—enable JVMs with real-time features. You can meet the hard or soft real-time constraints your applications require by leveraging the traditional benefits of the Java language—such as interoperability and safety—and combining them with features that the real-time Java extensions enable. Learn how.

Watch: Toward Deterministic Java PerformanceItem marked not complete - Click to mark complete

Read: Exploit real-time Java's unique featuresItem marked not complete - Click to mark complete

2. Building portable real-time applications

Standard Java applications can run without modification in a real-time JVM to achieve real-time goals. The Metronome garbage collector and Ahead-of-time (AOT) compilation—two key features in IBM WebSphere Real Time—let your real-time applications retain the benefits of Java portability. Understand how these features help turn any Java application into a real-time application.

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Watch: Hear Metronome: The WebSphere Real Time GCItem marked not complete - Click to mark complete

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3. Targeting applications for real-time Linux

A real-time JVM can take advantage of real-time operating system (RTOS) services to help applications meet stringent real-time requirements. Real-time classes and APIs in the javax.realtime package extend and tighten threading and synchronization capabilities for the Java programmer. See how these capabilities in WebSphere Real Time take advantage of the real-time version of the Linux kernel.

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Read: Implementing Real Time Solutions with Linux and IBMItem marked not complete - Click to mark complete

Read: Creating predictable-performance Java applications in real timeItem marked not complete - Click to mark complete

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4. Techniques for developing real-time applications

Write and deploy real-time Java applications using the tools provided with WebSphere Real Time, and use an Eclipse-based visualization tool to validate that they achieve deterministic quality of service.

Download: WebSphere Real Time evaluation versionItem marked not complete - Click to mark complete

Practice: Write, validate, and analyze a real-time Java applicationItem marked not complete - Click to mark complete

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Topics:

  • Application development
  • Linux
  • WebSphere

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About this knowledge path

Real-time applications — applications that must respond in a highly predictable time frame — are essential in financial services, telecommunications, manufacturing, defense, and other industries. This knowledge path is designed for experienced developers who need to build Java solutions that meet real-time requirements. Learn about the real-time Java extensions to the Java platform and how to exploit them via IBM WebSphere Real Time, a standards-compliant Java runtime and SDK.

Activities in this path

  1. Why real-time Java?
  2. Building portable real-time applications
  3. Targeting applications for real-time Linux
  4. Techniques for developing real-time applications

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