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 <article class="doc">
 <h1 class="page">Apache Felix File Install</h1>
 <div id="preamble">
 <div class="sectionbody">
 <div class="paragraph">
 <p>File Install is a directory based OSGi management agent.
 It uses a directory in the file system to install and start a bundle when it is first placed there.
 It updates the bundle when you update the bundle file in the directory and, when the file is deleted, it will stop and uninstall the bundle.</p>
 </div>
 <div class="paragraph">
 <p>File Install can do the same for configuration configuration files.
 This surprisingly simple bundle is very powerful because there are so many programs that work with the file system.
 For example:</p>
 </div>
 <div class="ulist">
 <ul>
 <li>
 <p>If you use Ant, you can just copy the resulting bundle to the watched directory.</p>
 </li>
 <li>
 <p>You can download bundles from the web and directly install them without any extra effort.</p>
 </li>
 <li>
 <p>You can easily drag and drop bundles in and out of the framework.</p>
 </li>
 </ul>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_setup"><a class="anchor" href="#_setup"></a>Setup</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>The bundle runs on any framework.
 For its configuration, it will use the following system properties:</p>
 </div>
 <table class="tableblock frame-all grid-all stretch">
 <colgroup>
 <col style="width: 33.3333%;">
 <col style="width: 33.3333%;">
 <col style="width: 33.3334%;">
 </colgroup>
 <thead>
 <tr>
 <th class="tableblock halign-left valign-top">Property</th>
 <th class="tableblock halign-left valign-top">Default</th>
 <th class="tableblock halign-left valign-top">Description</th>
 </tr>
 </thead>
 <tbody>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.poll</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">2000 ms</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Number of milliseconds between 2 polls of the directory</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.dir</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">./load</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">The name of the directory to watch.
 Several directories can be specified by using a comma separated list.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.log.level</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">1</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Threshold of logging information</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.log.default</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">stdout</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Possible values are <code>stdout</code>, <code>jul</code>.
 Defines where to log when the OSGi LogService is not available.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.bundles.new.start</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Automatically start newly discovered bundles</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.filter</code></p></td>
 <td class="tableblock halign-left valign-top"></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">A regular expression to be used to filter file names</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.tmpdir</code></p></td>
 <td class="tableblock halign-left valign-top"></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">The name of the temporary directory to use with exploded or transformed bundles (defaults to the temporary dir for the JVM)</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.noInitialDelay</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Determines if File Install waits <code>felix.fileinstall.poll</code> milliseconds before doing an initial scan or not.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.bundles.startTransient</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">If <code>true</code>, File Install will start the bundles transiently.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.bundles.startActivationPolicy</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Start bundles with their default activation policy or not</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.start.level</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">0</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">If set to a value different from <code>0</code>, File Install will set the start level for deployed bundles to that value.
 If set to <code>0</code>, the default framework bundle start level will be used.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.active.level</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">0</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">FileInstall won&#8217;t scan for files unless the active framework start level is greater than this value</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.enableConfigSave</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">true</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">If <code>false</code>, File Install will not write back in the file configurations changes.
 Note that this setting is global and can not be modified per polled directory.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.configEncoding</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">ISO-8859-1</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">The encoding used to read and write configuration files.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.bundles.updateWithListeners</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">If <code>true</code>, FileInstall will update managed bundles when a new version of an artifact handler is detected.
 This detection is performed based on the last modification date of the bundle registering the handler.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.optionalImportRefreshScope</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">all</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Possible values are <code>none</code>, <code>managed</code>, <code>all</code>.
 Defines which bundles can be elected for refresh.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.fragmentRefreshScope</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">all</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Possible values are <code>none</code>, <code>managed</code>, <code>all</code>.
 Defines which bundles can be elected for refresh.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.disableNio2</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">false</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">If <code>true</code>, File Install will not use NIO2 to scan directory and files.</p></td>
 </tr>
 <tr>
 <td class="tableblock halign-left valign-top"><p class="tableblock"><code>felix.fileinstall.subdir.mode</code></p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">jar</p></td>
 <td class="tableblock halign-left valign-top"><p class="tableblock">Possible values are <code>jar</code>, <code>skip</code>, <code>recurse</code>.
 Defines the behavior for sub directories.</p></td>
 </tr>
 </tbody>
 </table>
 <div class="paragraph">
 <p>Once started, the values of these properties are printed to the console.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_configurations"><a class="anchor" href="#_configurations"></a>Configurations</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Configuration files are plain property files (<code>java.util.Property</code>).
 The format is simple:</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>file ::= ( header | comment ) *
 header ::= &lt;header&gt; ( ':' | '=' ) &lt;value&gt; ( '\&lt;nl&gt; &lt;value&gt; ) *
 comment ::= '#' &lt;any&gt;</pre>
 </div>
 </div>
 <div class="paragraph">
 <p>Notice that this model only supports string properties.
 For example:</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre># default port
 ftp.port = 21</pre>
 </div>
 </div>
 <div class="paragraph">
 <p>Configuration file names are related to the PID and factory PID.
 The structure of the file name is as follows:</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>filename ::= &lt;pid&gt; ( '-' &lt;subname&gt; )? '.cfg'</pre>
 </div>
 </div>
 <div class="paragraph">
 <p>If the form is <code>&lt;pid&gt;.cfg</code>, the file contains the properties for a Managed Service.
 The <code>&lt;pid&gt;</code> is then the PID of the Managed Service.
 See the Configuration Admin service for details.</p>
 </div>
 <div class="paragraph">
 <p>When a Managed Service Factory is used, the situation is different.
 The <code>&lt;pid&gt;</code> part then describes the PID of the Managed Service Factory.
 You can pick any <code>&lt;subname&gt;</code>, this bundle will then create an instance for the factory for each unique name.
 For example:</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>com.acme.xyz.cfg // configuration for Managed Service
 // com.acme.xyz
 com.acme.abc-default.cfg // Managed Service Factory,
 // creates an instance for com.acme.abc</pre>
 </div>
 </div>
 <div class="paragraph">
 <p>If a configuration managed by File Install is modified, File Install will write the configuration back to a property file to ensure peristence across restarts.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_property_substitution_in_configuration_files"><a class="anchor" href="#_property_substitution_in_configuration_files"></a>Property substitution in configuration files</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>It is possible to use system properties to specify the values of properties in configuration files.
 This is achieved through system property substitution, which is instigated by using <code>$\{&lt;property&gt;\</code>} syntax, where &lt;property&gt;is the name of a system property to substitute.
 Bundle context properties will take precedence over system properties if available.
 Example:&lt;/property&gt;</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>ftp.port = ${system.ftp.port}</pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_watching_multiple_directories_with_file_install"><a class="anchor" href="#_watching_multiple_directories_with_file_install"></a>Watching multiple directories with File Install</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Starting with version 3.1.0 it is possible to specify several directories to watch with the system property <code>felix.fileinstall.dir</code>;
 this property can either point to a single directory or a comma separated list of directories.
 In addition, Apache Felix File Install provides a ManagedServiceFactory to create multiple instances of File Install.
 Asuming you have a File Install bundle watching a <code>bundles</code> folder, creating a new instance is as simple as creating a new configuration file <code>org.apache.felix.fileinstall-&lt;pid&gt;.cfg</code> in that folder (substitute &lt;pid&gt;with a unique Id for the new service instance):&lt;/pid&gt;</p>
 </div>
 <div class="literalblock">
 <div class="content">
 <pre>felix.fileinstall.poll=2000
 felix.fileinstall.dir=/configDir
 felix.fileinstall.debug=-1
 felix.fileinstall.filter=.*\\.cfg
 felix.fileinstall.bundles.new.start=false</pre>
 </div>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_exploded_bundles"><a class="anchor" href="#_exploded_bundles"></a>Exploded bundles</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Felix File Install has the ability to watch for exploded bundles and automatically update such bundles if the content is changed in any way.
 If a watched directory contains a sub directory, its content will be jar&#8217;ed and deployed to the OSGi framework.
 Any change to a file in this directory or one of its subdirectories will result in the directory to be jar&#8217;ed again and the corresponding bundle to be updated.</p>
 </div>
 </div>
 </div>
 <div class="sect1">
 <h2 id="_custom_artifacts"><a class="anchor" href="#_custom_artifacts"></a>Custom artifacts</h2>
 <div class="sectionbody">
 <div class="paragraph">
 <p>Apache Felix File Install can support deployment of custom artifacts.
 By default, configurations and plain OSGi bundles are supported, but other kind of artifacts can be deployed through custom artifact handlers.</p>
 </div>
 <div class="paragraph">
 <p>To add support for a custom artifact, a service implementing one of <code>org.apache.felix.fileinstall.ArtifactListener</code>'s sub interfaces must be registered in the OSGi registry.</p>
 </div>
 </div>
 </div>
 </article>
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