Mediation Manual ● Facts and Figures ● Lessons Learned and Conclusion
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CDC Runtime Guide
CDC Runtime Guide for the Sun Java Connected Device Configuration Application Management System Version 1.0 Sun Microsystems, Inc. www.sun.com November 2005 Copyright © 2005 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is described in this document. In particular, and without limitation, these intellectual property rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent applications in the U.S. and in other countries. THIS PRODUCT CONTAINS CONFIDENTIAL INFORMATION AND TRADE SECRETS OF SUN MICROSYSTEMS, INC. USE, DISCLOSURE OR REPRODUCTION IS PROHIBITED WITHOUT THE PRIOR EXPRESS WRITTEN PERMISSION OF SUN MICROSYSTEMS, INC. U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its supplements. This distribution may include materials developed by third parties. Parts of the product may be derived from Berkeley BSD systems, licensed from the University of California. UNIX is a registered trademark in the U.S. and in other countries, exclusively licensed through X/Open Company, Ltd. Sun, Sun Microsystems, the Sun logo, Java, J2ME, Java ME, Sun Corporate Logo and Java Logo are trademarks or registered trademarks of Sun Microsystems, Inc. in the U.S. and other countries. Products covered by and information contained in this service manual are controlled by U.S. Export Control laws and may be subject to the export or import laws in other countries. -
The Java Hotspot VM Under the Hood
The Java HotSpot VM Under the Hood Tobias Hartmann Principal Member of Technical Staff Compiler Group – Java HotSpot Virtual Machine Oracle Corporation August 2017 Copyright © 2017, Oracle and/or its affiliates. All rights reserved. | About me • Joined Oracle in 2014 • Software engineer in the Java HotSpot VM Compiler Team – Based in Baden, Switzerland • German citizen • Master’s degree in Computer Science from ETH Zurich • Worked on various compiler-related projects – Currently working on future Value Type support for Java Copyright © 2017, Oracle and/or its affiliates. All rights reserved. Safe Harbor Statement The following is intended to outline our general product direction. It is intended for information purposes only, and may not be incorporated into any contract. It is not a commitment to deliver any material, code, or functionality, and should not be relied upon in making purchasing decisions. The development, release, and timing of any features or functionality described for Oracle’s products remains at the sole discretion of Oracle. Copyright © 2017, Oracle and/or its affiliates. All rights reserved. 3 Outline • Intro: Why virtual machines? • Part 1: The Java HotSpot VM – JIT compilation in HotSpot – Tiered Compilation • Part 2: Projects – Segmented Code Cache – Compact Strings – Ahead-of-time Compilation – Minimal Value Types Copyright © 2017, Oracle and/or its affiliates. All rights reserved. 4 A typical computing platform User Applications Application Software Java SE Java EE Java Virtual Machine System Software Operating system Hardware Copyright © 2017, Oracle and/or its affiliates. All rights reserved. 5 A typical computing platform User Applications Application Software Java SE Java EE Java Virtual Machine System Software Operating system Hardware Copyright © 2017, Oracle and/or its affiliates. -
Technique: HTTP the Java Way
Technique: HTTP the Java way An article from Android in Practice EARLY ACCESS EDITION Charlie Collins, Michael D. Galpin, and Matthias Kaeppler MEAP Release: July 2010 Softbound print: Spring 2011 | 500 pages ISBN: 9781935182924 This article is taken from the book Android in Practice. The authors demonstrate how to send simple HTTP requests to a Web server using Java’s standard HTTP networking facilities. Tweet this button! (instructions here) Get 35% off any version of Android in Practice with the checkout code fcc35. Offer is only valid through www.manning.com. The standard Java class library already has a solution for HTTP messaging. An open-source implementation of these classes is bundled with Android’s class library, which is based on Apache Harmony. It’s simple and bare- bones in its structure and, while it supports features like proxy servers, cookies (to some degree), and SSL, the one thing that it lacks more than anything else is a class interface and component structure that doesn’t leave you bathed in tears. Still, more elaborate HTTP solutions are often wrappers around the standard Java interfaces and, if you don’t need all the abstraction provided, for example, by Apache HttpClient interfaces, the stock Java classes may not only be sufficient, they also perform much better thanks to a much slimmer, more low-level implementation. Problem You must perform simple networking tasks via HTTP (such as downloading a file) and you want to avoid the performance penalty imposed by the higher-level, much larger, and more complex Apache HttpClient implementation. Solution If you ever find yourself in this situation, you probably want to do HTTP conversations through a java.net.HttpURLConnection. -
WEP12 Writing TINE Servers in Java
Proceedings of PCaPAC2005, Hayama, Japan WRITING TINE SERVERS IN JAVA Philip Duval and Josef Wilgen Deutsches Elektronen Synchrotron /MST Abstract that the TINE protocol does not deal so much with ‘puts’ The TINE Control System [1] is used to some degree in and ‘gets’ as with data ‘links’. all accelerator facilities at DESY (Hamburg and Zeuthen) One’s first inclination when offering Java in the and plays a major role in HERA. It supports a wide Control System’s portfolio is to say that we don’t need to variety of platforms, which enables engineers and worry about a Java Server API since front-end servers machine physicists as well as professional programmers will always have to access their hardware and that is best to develop and integrate front-end server software into the left to code written in C. Furthermore, if there are real- control system using the operating system and platform of time requirements, Java would not be an acceptable their choice. User applications have largely been written platform owing to Java’s garbage collection kicking in at for Windows platforms (often in Visual Basic). In the next indeterminate intervals. generation of accelerators at DESY (PETRA III and Nevertheless, Java is a powerful language and offers VUV-FEL), it is planned to write the TINE user- numerous features and a wonderful framework for applications primarily in Java. Java control applications avoiding and catching nagging program errors. Thus have indeed enjoyed widespread acceptance within the there does in fact exist a strong desire to develop control controls community. The next step is then to offer Java as system servers using Java. -
Exploiting SAS Software Using Java Technology
Exploiting SAS® Software Using Java™ Technology Barbara Walters, SAS Institute Inc., Cary, NC Java programs are often delivered via the Internet. In order to protect the local machine from malicious programs, the Java language and the JVM Abstract provide a secure environment for application execution. The secure This paper describes how to use Java™ technology with SAS software. environment ensures that the client machine (the machine where the SAS Institute currently offers several Java development tools that allow browser is running) is not corrupted by the downloaded program and that applications to access SAS data and take advantage of SAS no information is stolen from the client machine. computational capabilities. This paper describes how to use these class libraries and address client/server configuration and performance Java security is based upon the “sandbox” model. The sandbox is the issues. set of resources (threads, socket connections, local files, etc.) that the downloaded Java code is allowed to access. The code is restricted from accessing resources outside of its sandbox. In executing Java applets, Introduction each Web browser defines the limits of the sandbox. Since its introduction in mid-1995, Java have become an integral part of The Security Manager enforces the limits of the sandbox. For applets, the World Wide Web. Java is a rich programming language that enables the Web browser controls the Security Manager. Each browser may put Web programmers to create sophisticated and responsive client/server different restrictions on applet behavior. The default limits imposed by applications. Because Java is portable and secure, users of Web the Security Manager are: applications can be confident that those applications will execute • Classes cannot access the local file system properly and not corrupt their computers. -
CDC Runtime Guide
CDC Runtime Guide Java™ Platform, Micro Edition Connected Device Configuration, Version 1.1.2 Foundation Profile, Version 1.1.2 Optimized Implementation Sun Microsystems, Inc. www.sun.com December 2008 Copyright © 2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is described in this document. In particular, and without limitation, these intellectual property rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent applications in the U.S. and in other countries. U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its supplements. This distribution may include materials developed by third parties. Parts of the product may be derived from Berkeley BSD systems, licensed from the University of California. UNIX is a registered trademark in the U.S. and in other countries, exclusively licensed through X/Open Company, Ltd. Sun, Sun Microsystems, the Sun logo, Java, Solaris and HotSpot are trademarks or registered trademarks of Sun Microsystems, Inc. or its subsidiaries in the United States and other countries. The Adobe logo is a registered trademark of Adobe Systems, Incorporated. Products covered by and information contained in this service manual are controlled by U.S. Export Control laws and may be subject to the export or import laws in other countries. Nuclear, missile, chemical biological weapons or nuclear maritime end uses or end users, whether direct or indirect, are strictly prohibited. -
A Post-Apocalyptic Sun.Misc.Unsafe World
A Post-Apocalyptic sun.misc.Unsafe World http://www.superbwallpapers.com/fantasy/post-apocalyptic-tower-bridge-london-26546/ Chris Engelbert Twitter: @noctarius2k Jatumba! 2014, 2015, 2016, … Disclaimer This talk is not going to be negative! Disclaimer But certain things are highly speculative and APIs or ideas might change by tomorrow! sun.misc.Scissors http://www.underwhelmedcomic.com/wp-content/uploads/2012/03/runningdude.jpg sun.misc.Unsafe - What you (don’t) know sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) • Used inside the JVM / JRE sun.misc.Unsafe - What you (don’t) know • Internal class (sun.misc Package) • Used inside the JVM / JRE // Unsafe mechanics private static final sun.misc.Unsafe U; private static final long QBASE; private static final long QLOCK; private static final int ABASE; private static final int ASHIFT; static { try { U = sun.misc.Unsafe.getUnsafe(); Class<?> k = WorkQueue.class; Class<?> ak = ForkJoinTask[].class; example: QBASE = U.objectFieldOffset (k.getDeclaredField("base")); java.util.concurrent.ForkJoinPool QLOCK = U.objectFieldOffset (k.getDeclaredField("qlock")); ABASE = U.arrayBaseOffset(ak); int scale = U.arrayIndexScale(ak); if ((scale & (scale - 1)) != 0) throw new Error("data type scale not a power of two"); ASHIFT = 31 - Integer.numberOfLeadingZeros(scale); } catch (Exception e) { throw new Error(e); } } } sun.misc.Unsafe -
Free Java Developer Room
Room: AW1.121 Free Java Developer Room Saturday 2008-02-23 14:00-15:00 Welcome to the Free Java Meeting Welcome and introduction to the projects, people and themes that make Rich Sands – Mark Reinhold – Mark up the Free Java Meeting at Fosdem. ~ GNU Classpath ~ OpenJDK Wielaard – Tom Marble 15:00-16:00 Mobile Java Take your freedom to the max! Make your Free Java mobile. Christian Thalinger - Guillaume ~ CACAO Embedded ~ PhoneME ~ Midpath Legris - Ray Gans 16:00-16:40 Women in Java Technology Female programmers are rare. Female Java programmers are even more Clara Ko - Linda van der Pal rare. ~ Duchess, Ladies in Java Break 17:00-17:30 Hacking OpenJDK & Friends Hear about directions in hacking Free Java from the front lines. Roman Kennke - Andrew Hughes ~ OpenJDK ~ BrandWeg ~ IcePick 17:30-19:00 VM Rumble, Porting and Architectures Dalibor Topic - Robert Lougher - There are lots of runtimes able to execute your java byte code. But which Peter Kessler - Ian Rogers - one is the best, coolest, smartest, easiest portable or just simply the most fun? ~ Kaffe ~ JamVM ~ HotSpot ~ JikesRVM ~ CACAO ~ ikvm ~ Zero- Christian Thalinger - Jeroen Frijters assembler Port ~ Mika - Gary Benson - Chris Gray Sunday 2008-02-24 9:00-10:00 Distro Rumble So which GNU/Linux distribution integrates java packages best? Find out Petteri Raty - Tom Fitzsimmons - during this distro shootout! ~ Gentoo ~ Fedora ~ Debian ~ Ubuntu Matthias Klose 10:00-11:30 The Free Java Factory OpenJDK and IcedTea, how are they made and how do you test them? David Herron - Lillian Angel - Tom ~ OpenJDK ~ IcedTea Fitzsimmons 11:30-13:00 JIT Session: Discussion Topics Dynamically Loaded Want to hear about -- or talk about -- something the Free Java world and don't see a topic on the agenda? This time is reserved for late binding Tom Marble discussion. -
CDC Build System Guide
CDC Build System Guide Java™ Platform, Micro Edition Connected Device Configuration, Version 1.1.2 Foundation Profile, Version 1.1.2 Optimized Implementation Sun Microsystems, Inc. www.sun.com December 2008 Copyright © 2008 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, California 95054, U.S.A. All rights reserved. Sun Microsystems, Inc. has intellectual property rights relating to technology embodied in the product that is described in this document. In particular, and without limitation, these intellectual property rights may include one or more of the U.S. patents listed at http://www.sun.com/patents and one or more additional patents or pending patent applications in the U.S. and in other countries. U.S. Government Rights - Commercial software. Government users are subject to the Sun Microsystems, Inc. standard license agreement and applicable provisions of the FAR and its supplements. This distribution may include materials developed by third parties. Parts of the product may be derived from Berkeley BSD systems, licensed from the University of California. UNIX is a registered trademark in the U.S. and in other countries, exclusively licensed through X/Open Company, Ltd. Sun, Sun Microsystems, the Sun logo, Java, Solaris and HotSpot are trademarks or registered trademarks of Sun Microsystems, Inc. or its subsidiaries in the United States and other countries. The Adobe logo is a registered trademark of Adobe Systems, Incorporated. Products covered by and information contained in this service manual are controlled by U.S. Export Control laws and may be subject to the export or import laws in other countries. Nuclear, missile, chemical biological weapons or nuclear maritime end uses or end users, whether direct or indirect, are strictly prohibited. -
Fedora Core, Java™ and You
Fedora Core, Java™ and You Gary Benson Software Engineer What is Java? The word ªJavaº is used to describe three things: The Java programming language The Java virtual machine The Java platform To support Java applications Fedora needs all three. What Fedora uses: GCJ and ECJ GCJ is the core of Fedora©s Java support: GCJ includes gcj, a compiler for the Java programming language. GCJ also has a runtime and class library, collectively called libgcj. The class library is separately known as GNU Classpath. ECJ is the Eclipse Compiler for Java: GCJ©s compiler gcj is not used for ªtraditionalº Java compilation. More on that later... Why libgcj? There are many free Java Virtual machines: Cacao, IKVM, JamVM, Jikes RVM, Kaffe, libgcj, Sable VM, ... There are two main reasons Fedora uses libgcj: Availability on many platforms. Ability to use precompiled native code. GNU Classpath Free core class library for Java virtual machines and compilers. The JPackage Project A collection of some 1,600 Java software packages for Linux: Distribution-agnostic RPM packages. Both runtimes/development kits and applications. Segregation between free and non-free packages. All free packages built entirely from source. Multiple runtimes/development kits may be installed. Fedora includes: JPackage-compatible runtime and development kit packages. A whole bunch of applications. JPackage JOnAS Fedora©s Java Compilers gcj can operate in several modes: Java source (.java) to Java bytecode (.class) Java source (.java) to native machine code (.o) Java bytecode (.class, .jar) to native machine code (.o) In Fedora: ECJ compiles Java source to bytecode. gcj compiles that bytecode to native machine code. -
Java in Embedded Linux Systems
Java in Embedded Linux Systems Java in Embedded Linux Systems Thomas Petazzoni / Michael Opdenacker Free Electrons http://free-electrons.com/ Created with OpenOffice.org 2.x Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 1 Rights to copy Attribution ± ShareAlike 2.5 © Copyright 2004-2008 You are free Free Electrons to copy, distribute, display, and perform the work [email protected] to make derivative works to make commercial use of the work Document sources, updates and translations: Under the following conditions http://free-electrons.com/articles/java Attribution. You must give the original author credit. Corrections, suggestions, contributions and Share Alike. If you alter, transform, or build upon this work, you may distribute the resulting work only under a license translations are welcome! identical to this one. For any reuse or distribution, you must make clear to others the license terms of this work. Any of these conditions can be waived if you get permission from the copyright holder. Your fair use and other rights are in no way affected by the above. License text: http://creativecommons.org/licenses/by-sa/2.5/legalcode Java in Embedded Linux Systems © Copyright 2004-2007, Free Electrons, Creative Commons Attribution-ShareAlike 2.5 license http://free-electrons.com Sep 15, 2009 2 Best viewed with... This document is best viewed with a recent PDF reader or with OpenOffice.org itself! Take advantage of internal -
Towards Architectural Programming of Embedded Systems
Towards Architectural Programming of Embedded Systems Arne Haber, Jan O. Ringert, Bernhard Rumpe Software Engineering, RWTH Aachen University, Germany http://www.se-rwth.de/ Abstract: Integrating architectural elements with a modern programming language is essential to ensure a smooth combination of architectural design and programming. In this position statement, we motivate a combination of architectural description for distributed, asynchronously communicating systems and Java as an example for such an integration. The result is an ordinary programming language, that exhibits archi- tecture, data structure and behavior within one view. Mappings or tracing between different views is unnecessary. A prototypical implementation of a compiler demon- strates the possibilities and challenges of architectural programming. 1 Java with Architectural Elements As stated in [MT00] there are a number of languages that support design, analysis, and further development of software-system-architectures. These languages are commonly known as Architecture Description Languages (ADL) and allow a high level description of software systems of a specific domain. Using an ADL enables reasoning about specific system properties in an early development stage [GMW97]. Furthermore, there are quite often mappings from architecture to a General Purpose Language (GPL), producing code frames for the GPL. This helps ensuring the architectural consistency initially, but when the code evolves the architecture becomes implicitly polluted or when the architecture shall be evolved this needs to be done on the code level. Tracing is therefore important to keep architecture and code aligned. However, it would be much better to integrate both, architecture and code into one single artifact such that tracing is not necessary anymore.