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研究生： 凌家強
Jia-Ciang Ling
論文名稱： OSGi平台最佳化之設計與實作
Design and Implementation of OSGi Platform Optimization
指導教授： 李允中
Jonathan Lee
口試委員:
學位類別： 碩士
Master
系所名稱： 資訊電機學院 - 資訊工程學系
Department of Computer Science & Information Engineering
畢業學年度： 97
語文別： 中文
論文頁數： 47
中文關鍵詞： 嵌入式系統平台上執行開放服務闡道系統
外文關鍵詞： OSGi Platform Optimization on Embedded system
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    • 若將OSGi平台放置到嵌入式系統上執行，效能的改善是個重要的課題，本論文因此提出OSGi平台(Platform)效能改善方法。OSGi平台之執行包含三個階段，第一個階段是OSGi平台啟動，第二個階段是OSGi Bundle安裝及執行，第三個階段是中止平台執行，此研究裡，將針對第一個階段OSGi平台啟動進行最佳化，並選擇Apache Felix[3]為欲改善之目標平台。在此研究所選擇之測試嵌入式系統上，Felix在改善前需花費八十秒的啟動時間，而在改善後則花費四十秒的啟動時間，最佳化後整體效能提升50%。

    Recently, OSGi has been widely adopted to serve a platform on OBU to enable dynamically installing and composition of software modules in telematics domain. It is imperative to investigate the optimization of OSGi platform especially on devices with limited resources, such as an OBU or a handheld device, to better deliver OSGi services in a timely manner. In this work, we select Apache Felix as the target platform and propose numerous optimization techniques. The experiment result shows that the optimized platform can save 50% in its startup time.

    摘 要.................................................................................................................... i ABSTRACT..........................................................................................................ii 誌 謝..................................................................................................................iii 目 錄.................................................................................................................. iv 圖 目 錄............................................................................................................... v 表 目 錄.............................................................................................................. vi 一、緒 論........................................................................................................... 1 1-1 引言與動機......................................................................................... 1 1-2 論文架構............................................................................................. 2 二、背景知識介紹............................................................................................... 3 2-1 OSGi 架構........................................................................................... 3 2-2 OSGi 平台比較.................................................................................. 6 2-3 Apache Felix OSGi 平台.................................................................... 8 三、研究步驟..................................................................................................... 11 3-1 OSGi 平台啟動、執行與結束階段效能比較................................ 11 3-2 OSGi 平台啟動階段流程................................................................ 12 3-3 OSGi 平台啟動階段最佳化............................................................ 19 3-4 最佳化效能比較............................................................................... 34 3-5 驗證................................................................................................... 38 四、結論............................................................................................................. 39 參 考 文 獻....................................................................................................... 40

    [ 1 ] OSGi Alliance. http://www.osgi.org/Main/HomePage
    [ 2 ] OSGi Service Platform Core Specification, Release 4, Version 4.1. April 2007.
    [ 3 ] Apache Felix. http://felix.apache.org/site/index.html
    [ 4 ] Eclipse Equinox. www.eclipse.org/equinox/
    [ 5 ] FUSE ESB 4. www.fusesource.com
    [ 6 ] Knopflerish. www.knopflerfish.org
    [ 7 ] ProSyst. www.prosyst.com
    [ 8 ] Java Platform Performance Strategies and Tactics, Steve Wilson, Jeff Kesselman. http://java.sun.com/docs/books/performance/1st_edition/html/JPTitle.fm.html
    2001.
    [ 9 ] Java Performance Tuning, Jack Shirazi.(O’REILLY)
    [ 10 ] Open Source Software Foundry, http://www.openfoundry.org/en/
    [ 11 ] Apache Felix OSGi Tutorial. http://felix.apache.org/site/apache-felix-osgi-tutorial.html
    [ 12 ] Wikipedia. OSGi. http://en.wikipedia.org/wiki/OSGi

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