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   <title>Eclipse Gemini Blueprint</title><link rel="stylesheet" href="css/html.css" type="text/css"><meta name="generator" content="DocBook XSL Stylesheets V1.72.0"><link rel="start" href="faq.html" title="Eclipse Gemini Blueprint"><link rel="next" href="spring-osgi-faq.html" title="Chapter&nbsp;1.&nbsp;Frequently Asked Questions"></head><body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"><div class="book" lang="en"><div class="titlepage"><div><div><h1 class="title"><a name="d886e1"></a>Eclipse Gemini Blueprint</h1></div><div><h2 class="subtitle">Frequently Asked Questions</h2></div><div><div xmlns:fo="http://www.w3.org/1999/XSL/Format" class="authorgroup"><h2>Authors</h2><p></p><span class="author"><span class="firstname">Costin</span> <span class="surname">Leau</span> 
            (SpringSource)
            </span></div></div><div><p class="releaseinfo"></p></div><div><p class="copyright">Copyright &copy; 2006 -, 2011 VMware Inc., Oracle Inc.</p></div><div><div class="legalnotice"><a name="d886e16"></a><p>Documentation made available under the terms of the Eclipse Public License v1.0 
      and Apache License v2.0 which accompanies this distribution. 
      The Eclipse Public License is available at <a xmlns:xlink="http://www.w3.org/1999/xlink" href="http://www.eclipse.org/legal/epl-v10.html" target="_top">http://www.eclipse.org/legal/epl-v10.html</a> and 
      the Apache License v2.0 is available at <a xmlns:xlink="http://www.w3.org/1999/xlink" href="http://www.opensource.org/licenses/apache2.0.php" target="_top">http://www.opensource.org/licenses/apache2.0.php</a>.
      You may elect to redistribute this code under either of these licenses.</p></div></div></div><hr></div><div class="toc"><dl><dt><span class="chapter"><a href="spring-osgi-faq.html">1. Frequently Asked Questions</a></span></dt><dd><dl><dt><span class="section"><a href="spring-osgi-faq.html#eclipse-springdm">1.1. What's the relationship between Spring Dynamic Modules and Gemini Blueprint?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#name-change">1.2. What happened to "Spring OSGi" project name?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#internal-package">1.3. Why aren't there any javadocs on <code class="literal">*.internal.*</code>?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#requirements">1.4. What are Gemini Blueprint requirements?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#other-module-frameworks">1.5. Are there plans to support other dynamic module frameworks (such as the JSR 277 extensions in Java 7)?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#restricted-environments">1.6. Will Gemini Blueprint work in restricted environments (such as small/mobile devices)?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#supported-osgi-platforms">1.7. What OSGi platforms are supported?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#osgi-intro">1.8. Where can I learn about OSGi?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#building-the-sources">1.9. I have problems building the sources. What can I do?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#logging">1.10. How can I use logging in OSGi?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#commons-logging">1.11. If you use the commons-logging API, why rely on SLF4J and
        not the commons-logging jar?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#getting-commons-logging-to-work">1.12. I have to use commons-logging, what can I do?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#logging-impl-choice">1.13. Why don't you use the OSGi logging service/[insert your favourite
        logging library in here]?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#osgi-wrapping">1.14. I have to use [insert name] library/framework inside. What can I do?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#jdk-crippled-jta-api">1.15. I keep getting <span class="emphasis"><em>java.lang.NoClassDefFoundError: javax/transaction/...</em></span> when trying to do data access..</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#incomplete-osgi-jar">1.16. When doing integration testing I receive <span class="emphasis"><em>java.lang.NoClassDefFoundError: org.osgi.vendor.framework property not set</em></span>... </a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#auto-export-visibility">1.17. The autoExport option doesn't work properly!</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#junit382-serialization">1.18. When using Gemini Blueprint integration testing I get an exception about serialVersionUID. What is the problem?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#pde-errors">1.19. I'm using Eclipse PDE and I started getting some weird exceptions/behaviour. What's the matter?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#upgrade-to-1.1">1.20. I'm upgrading to Spring DM 1.1 but now I get some ClassNotFoundExceptions. What has changed?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#proxy-equality">1.21. I've noticed that objects imported by Gemini Blueprint are not always equal to the raw target service. Why is that?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#static-collections">1.22. My Gemini Blueprint collection doesn't change even though the number of OSGi service changes. What's wrong?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#update-to-1.2">1.23. I have upgraded to Gemini Blueprint but my custom extender/web extender configuration doesn't work anymore. What has changed?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#linkage-error">1.24. I get a <code class="literal">java.lang.LinkageError: loader constraint violation</code> if I use Gemini Blueprint. Things work fine with vanilla OSGi. 
     	What's wrong?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#blueprint">1.25. What can I use Gemini Blueprint with the Blueprint Container spec? What's the relationship between the two? Are the they compatible?
     	Are there any differences?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#kf-2.3-boot-delegation">1.26. I'm using Knopflerfish 2.3.x and I have a lot of visibility exception. How can I fix this?</a></span></dt><dt><span class="section"><a href="spring-osgi-faq.html#pde-cycles">1.27. I'm using Gemini Blueprint and Spring jars inside Eclipse PDE but I get an error about cycle dependency errors. What's wrong?</a></span></dt></dl></dd></dl></div></div><div xmlns:fo="http://www.w3.org/1999/XSL/Format" class="navfooter"><hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left">&nbsp;</td><td width="20%" align="center">&nbsp;</td><td width="40%" align="right">&nbsp;<a accesskey="n" href="spring-osgi-faq.html">Next</a></td></tr><tr><td width="40%" align="left" valign="top">&nbsp;</td><td width="20%" align="center"><span style="color:white;font-size:90%;"><a href="http://www.SpringSource.com/" title="SpringSource - Spring from the Source">Sponsored by SpringSource
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