| <!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> |
| <html><head> |
| |
| |
| |
| <title>Apache Felix - Architecture Handler</title> |
| <link rel="stylesheet" href="architecture-handler_files/site.css" type="text/css" media="all"> |
| <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> |
| </head><body> |
| <div class="title"><div class="logo"><a href="http://felix.apache.org/site/index.html"><img alt="Apache Felix" src="architecture-handler_files/logo.png" border="0"></a></div><div class="header"><a href="http://www.apache.org/"><img alt="Apache" src="architecture-handler_files/apache.png" border="0"></a></div></div> |
| <div class="menu"> |
| <ul> |
| <li><a href="http://felix.apache.org/site/news.html" title="news">news</a></li> |
| <li><a href="http://felix.apache.org/site/license.html" title="license">license</a></li> |
| <li><span class="nobr"><a href="http://felix.apache.org/site/downloads.cgi" title="Visit page outside Confluence" rel="nofollow">downloads<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></li> |
| <li><a href="http://felix.apache.org/site/documentation.html" title="documentation">documentation</a></li> |
| <li><a href="http://felix.apache.org/site/mailinglists.html" title="mailinglists">mailing lists</a></li> |
| <li><a href="http://felix.apache.org/site/contributing.html" title="Contributing">contributing</a></li> |
| <li><span class="nobr"><a href="http://www.apache.org/" title="Visit page outside Confluence" rel="nofollow">asf<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></li> |
| <li><span class="nobr"><a href="http://www.apache.org/foundation/sponsorship.html" title="Visit page outside Confluence" rel="nofollow">sponsorship<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></li> |
| <li><span class="nobr"><a href="http://www.apache.org/foundation/thanks.html" title="Visit page outside Confluence" rel="nofollow">sponsors<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span> |
| <!-- ApacheCon Ad --> |
| <iframe src="architecture-handler_files/button.html" style="border-width: 0pt; float: left;" scrolling="no" width="135" frameborder="0" height="135"></iframe> |
| <p style="height: 100px;"> |
| <!-- ApacheCon Ad --> |
| </p></li></ul> </div> |
| <div class="main"> |
| <table class="sectionMacro" border="0" cellpadding="5" cellspacing="0" width="100%"><tbody><tr> |
| <td class="confluenceTd" valign="top" width="80%"> |
| <h1><a name="ArchitectureHandler-IntrospectionandArchitecture"></a>Introspection and Architecture</h1> |
| |
| <p>The architecture feature allows obtaining an architectural / |
| component view of your systems. It exposes a snapshot of the present |
| instances & factories, the state of these instances ...<br> |
| Moreover; iPOJO defines an 'arch' command displaying this architecture |
| in Felix. You need to install the arch command bundle available in the |
| Felix trunk.</p> |
| |
| <h2><a name="ArchitectureHandler-Reflectiononthecomponent"></a>Reflection on the component</h2> |
| |
| <p>The architecture feature does "reflection" on the iPOJO containers. |
| It gathers information about the component (state, class name ...), |
| requirement (state, multiple, optional ...), provided services (state, |
| properties) ... Each handler can participate to the architecture. This |
| information allows you to know why an instance does not start, or why |
| the component does not publish / provide a service.</p> |
| |
| <h2><a name="ArchitectureHandler-Metadata"></a>Metadata</h2> |
| |
| <p>The architecture (i.e. instance introspection) is activated by default. To disable it, you need to add an attribute <em>"architecture=false"</em> to the component element:</p> |
| <div class="code"><div class="codeContent"> |
| <pre class="code-xml"><span class="code-tag"><component classname=<span class="code-quote">"fr.imag.adele.escoffier.hello.impl.HelloServiceImpl"</span> architecture=<span class="code-quote">"false"</span>></span></pre> |
| </div></div> |
| <p>By default, the architecture feature is enabled.</p> |
| |
| <h2><a name="ArchitectureHandler-The"arch"command"></a>The "arch" command</h2> |
| |
| <p>A Felix command comes with the architecture handler. This command |
| looks for all component exposing the architecture and print the |
| information.</p> |
| <div class="code"><div class="codeContent"> |
| <pre class="code-java">arch => displays instances name & state (equivalent to arch \-instances) |
| arch -instance $instance_name => displays complete information about the instance $instance_name |
| arch -factories => display the list of available factories |
| arch -factory $factory_name => display complete information about the factory $factory_name |
| arch -handlers => list available handlers</pre> |
| </div></div> |
| |
| <p>More info on the <tt>arch</tt> command are available <a href="http://felix.apache.org/site/ipojo-arch-command.html" title="iPOJO-Arch-Command">here</a>.</p> |
| |
| <h2><a name="ArchitectureHandler-Technicalinformation"></a>Technical information</h2> |
| |
| <p>In fact, when a component enables the architecture introspection, |
| its container exposes an Architecture service. Any architecture |
| requester can obtain information about the instance. For example, the |
| arch command requests all the architecture services and prints the |
| information.</p> |
| </td> |
| <td class="confluenceTd" valign="top" width="20%"> |
| <h6><a name="ArchitectureHandler-Overview"></a><b>Overview</b></h6> |
| <ul> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo.html" title="Apache Felix iPOJO">Home Page</a></li> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-feature-overview.html" title="Apache Felix iPOJO Feature Overview">iPOJO Feature Overview</a></li> |
| <li><a href="http://felix.apache.org/site/download.html" title="Download">Download & Install </a></li> |
| </ul> |
| |
| |
| <h6><a name="ArchitectureHandler-GettingStarted"></a><b>Getting Started</b></h6> |
| <ul> |
| <li><a href="http://felix.apache.org/site/ipojo-in-10-minutes.html" title="iPOJO in 10 minutes">iPOJO in 10 minutes</a></li> |
| <li><a href="http://felix.apache.org/site/how-to-use-ipojo-annotations.html" title="How to use iPOJO Annotations">How to use iPOJO Annotations</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-hello-word-maven-based-tutorial.html" title="iPOJO Hello Word (Maven-Based) tutorial">iPOJO Hello Word (Maven-Based) tutorial</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-advanced-tutorial.html" title="iPOJO Advanced Tutorial">iPOJO Advanced Tutorial</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-composition-tutorial.html" title="iPOJO Composition Tutorial">iPOJO Composition Tutorial</a></li> |
| </ul> |
| |
| |
| <h6><a name="ArchitectureHandler-UserGuide"></a><b>User Guide</b></h6> |
| <ul> |
| <li><a href="http://felix.apache.org/site/describing-components.html" title="Describing components">Describing components (handler list) </a></li> |
| <li><a href="http://felix.apache.org/site/using-xml-schemas.html" title="Using XML Schemas">Using XML Schemas</a></li> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-testing-components.html" title="apache-felix-ipojo-testing-components">Testing components</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-advanced-topics.html" title="iPOJO Advanced Topics">Advanced Topics</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-faq.html" title="iPOJO FAQ">FAQ</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-reference-card.html" title="iPOJO-Reference-Card">iPOJO Reference Card</a></li> |
| </ul> |
| |
| |
| <h6><a name="ArchitectureHandler-Tools"></a><b>Tools</b></h6> |
| <ul> |
| <li><a href="http://felix.apache.org/site/ipojo-eclipse-plug-in.html" title="iPOJO Eclipse Plug-in">iPOJO Eclipse Plug-in</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-ant-task.html" title="iPOJO Ant Task">iPOJO Ant Task</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-maven-plug-in.html" title="iPOJO Maven Plug-in">iPOJO Maven Plug-in</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-arch-command.html" title="iPOJO-Arch-Command">iPOJO Arch Command</a></li> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-junit4osgi.html" title="apache-felix-ipojo-junit4osgi">Junit4OSGi</a></li> |
| <li><a href="http://felix.apache.org/site/ipojo-concepts-overview.html" title="iPOJO Concepts Overview">iPOJO concepts overview</a></li> |
| </ul> |
| |
| |
| <h6><a name="ArchitectureHandler-DeveloperGuide"></a><b>Developer Guide</b></h6> |
| <ul> |
| <li>API: <span class="nobr"><a href="http://people.apache.org/%7Eclement/ipojo/api/1.0/" title="Visit page outside Confluence" rel="nofollow">1.0<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></li> |
| <li><a href="http://felix.apache.org/site/how-to-write-your-own-handler.html" title="How to write your own handler">How to write your own handler</a></li> |
| <li><a href="http://felix.apache.org/site/how-to-use-ipojo-manipulation-metadata.html" title="How to use iPOJO Manipulation Metadata">How to use iPOJO Manipulation Metadata</a></li> |
| <li><a href="http://felix.apache.org/site/dive-into-the-ipojo-manipulation-depths.html" title="Dive into the iPOJO Manipulation depths">Dive into the iPOJO Manipulation depths</a></li> |
| </ul> |
| |
| |
| <h6><a name="ArchitectureHandler-Misc&Contact"></a><b>Misc & Contact</b></h6> |
| <ul> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-issuestracker.html" title="apache-felix-ipojo-issuestracker">Issues Tracker</a></li> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-supportedvms.html" title="apache-felix-ipojo-supportedVMs">Supported JVMs</a></li> |
| <li><a href="http://felix.apache.org/site/apache-felix-ipojo-supportedosgi.html" title="apache-felix-ipojo-supportedOSGi">Supported OSGi Implementations</a></li> |
| <li><span class="nobr"><a href="http://ipojo-dark-side.blogspot.com/" title="Visit page outside Confluence" rel="nofollow">iPOJO's Dark Side Blog<sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></li> |
| <li><a href="http://felix.apache.org/site/future-ideas.html" title="Future Ideas">Future Ideas</a></li> |
| <li><a href="http://felix.apache.org/site/contact.html" title="Contact">Contact</a></li> |
| <li><a href="http://felix.apache.org/site/related-works.html" title="Related Works">Related Works</a></li> |
| <li><a href="http://felix.apache.org/site/article-presentations.html" title="Article & Presentations">Article & Presentations</a></li> |
| </ul> |
| |
| |
| <hr> |
| <div class="" align="center"> |
| <p><span class="nobr"><a href="http://cwiki.apache.org/confluence/createrssfeed.action?types=blogpost&statuses=created&statuses=modified&spaces=FELIX&labelString=iPOJO&rssType=atom&maxResults=10&timeSpan=5&publicFeed=true&title=iPOJO%20Atom%20Feed" title="Stay tuned!" rel="nofollow"><img src="architecture-handler_files/feed-icon-32x32.png" align="absmiddle" border="0"><sup><img class="rendericon" src="architecture-handler_files/linkext7.gif" alt="" align="absmiddle" border="0" width="7" height="7"></sup></a></span></p></div> |
| |
| <script type="text/javascript"> |
| var gaJsHost = (("https:" == document.location.protocol) ? "https://ssl." : "http://www."); |
| document.write(unescape("%3Cscript src='" + gaJsHost + "google-analytics.com/ga.js' type='text/javascript'%3E%3C/script%3E")); |
| </script><script src="architecture-handler_files/ga.js" type="text/javascript"></script> |
| <script type="text/javascript"> |
| var pageTracker = _gat._getTracker("UA-1518442-4"); |
| pageTracker._trackPageview(); |
| </script> |
| </td></tr></tbody></table> |
| </div> |
| </body></html> |
