Gitiles
Code Review Sign In
gerrit.onosproject.org / onos-felix / fc1e692c31b71f07252cf6a33d0175a5674934a6 / . / main.distribution / doc / apache-felix-framework-usage-documentation.html
blob: c10d7d053b653a6355918e62aa21a6e4a95676b9 [file] [log] [blame]
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]1<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
2<html><head>
3
4
5
6 <title>Apache Felix - Apache Felix Framework Usage Documentation</title>
7 <link rel="stylesheet" href="apache-felix-framework-usage-documentation_files/site.css" type="text/css" media="all">
8 <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
9 </head><body>
10 <div class="title"><div class="logo"><a href="http://felix.apache.org/site/index.html"><img alt="Apache Felix" src="apache-felix-framework-usage-documentation_files/logo.png" border="0"></a></div><div class="header"><a href="http://www.apache.org/"><img alt="Apache" src="apache-felix-framework-usage-documentation_files/apache.png" border="0"></a></div></div>
11 <div class="menu">
12<ul>
13 <li><a href="http://felix.apache.org/site/news.html" title="news">news</a></li>
14 <li><a href="http://felix.apache.org/site/license.html" title="license">license</a></li>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]15 <li><a href="http://felix.apache.org/site/downloads.cgi" class="external-link" rel="nofollow">downloads</a></li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]16 <li><a href="http://felix.apache.org/site/documentation.html" title="documentation">documentation</a></li>
17 <li><a href="http://felix.apache.org/site/mailinglists.html" title="mailinglists">mailing lists</a></li>
18 <li><a href="http://felix.apache.org/site/contributing.html" title="Contributing">contributing</a></li>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]19 <li><a href="http://www.apache.org/" class="external-link" rel="nofollow">asf</a></li>
20 <li><a href="http://www.apache.org/foundation/sponsorship.html" class="external-link" rel="nofollow">sponsorship</a></li>
21 <li><a href="http://www.apache.org/foundation/thanks.html" class="external-link" rel="nofollow">sponsors</a>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]22<!-- ApacheCon Ad -->
23<iframe src="apache-felix-framework-usage-documentation_files/button.html" style="border-width: 0pt; float: left;" frameborder="0" height="135" scrolling="no" width="135"></iframe>
24<p style="height: 100px;">
25<!-- ApacheCon Ad -->
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]26</p></li></ul>
27 </div>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]28 <div class="main">
29<h1><a name="ApacheFelixFrameworkUsageDocumentation-ApacheFelixFrameworkUsageDocumentation"></a>Apache Felix Framework Usage Documentation</h1>
30
31<ul>
32 <li><a href="#ApacheFelixFrameworkUsageDocumentation-downloadingframework">Downloading the Framework</a></li>
33 <li><a href="#ApacheFelixFrameworkUsageDocumentation-startingframework">Starting the Framework</a></li>
34 <li><a href="#ApacheFelixFrameworkUsageDocumentation-frameworkshell">Framework Shell</a>
35 <ul>
36 <li><a href="#ApacheFelixFrameworkUsageDocumentation-installingbundles">Installing Bundles</a></li>
37 <li><a href="#ApacheFelixFrameworkUsageDocumentation-installingbundlesproxies">Web Proxy Issues when Installing Bundles</a></li>
38 </ul>
39 </li>
40 <li><a href="#ApacheFelixFrameworkUsageDocumentation-autodeploy">Bundle Auto-Deploy</a></li>
41 <li><a href="#ApacheFelixFrameworkUsageDocumentation-configuringframework">Configuring the Framework</a>
42 <ul>
43 <li><a href="#ApacheFelixFrameworkUsageDocumentation-migrating">Migrating from Earlier Versions</a></li>
44 <li><a href="#ApacheFelixFrameworkUsageDocumentation-propertysubstitution">System Property Substitution</a></li>
45 </ul>
46 </li>
47 <li><a href="#ApacheFelixFrameworkUsageDocumentation-configuringbundles">Configuring Bundles</a></li>
48 <li><a href="#ApacheFelixFrameworkUsageDocumentation-feedback">Feedback</a></li>
49</ul>
50
51
52<p><a name="ApacheFelixFrameworkUsageDocumentation-downloadingframework"></a></p>
53
54<h2><a name="ApacheFelixFrameworkUsageDocumentation-DownloadingtheFramework"></a>Downloading the Framework</h2>
55
56<p>Go to the <a href="http://felix.apache.org/site/downloads.html" title="downloads">downloads</a> page and download the latest Felix framework distribution.</p>
57
58<p><a name="ApacheFelixFrameworkUsageDocumentation-startingframework"></a></p>
59
60<h2><a name="ApacheFelixFrameworkUsageDocumentation-StartingtheFramework"></a>Starting the Framework</h2>
61
62<p>Start the framework from the installation directory by typing:</p>
63
64<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
65<pre>java -jar bin/felix.jar
66</pre>
67</div></div>
68
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]69<p>The framework launcher starts the framework and installs and starts all bundles contained in the <tt>bundle</tt>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]70directory of the current directory. By default, the bundle directory
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]71contains shell-related bundles providing a textual user interface to
72interact with the framework. Bundles installed into the framework are
73copied into a bundle cache directory for subsequent executions. By
74default, the framework creates a cache directory, called <tt>felix-cache</tt>,
75in your current working directory. If you want to start the framework
76using a different bundle cache directory, you can do so like this:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]77
78<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
79<pre>java -jar bin/felix.jar &lt;cache-path&gt;
80</pre>
81</div></div>
82
83<p>Where <tt>&lt;cache-path&gt;</tt> is the path you want to use as the
84bundle cache. If you specify a relative cache path, then it will be
85treated as relative to the current working directory.</p>
86
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]87<div class="panelMacro"><table class="infoMacro"><colgroup><col width="24"><col></colgroup><tbody><tr><td valign="top"><img src="apache-felix-framework-usage-documentation_files/information.gif" alt="" align="absmiddle" border="0" height="16" width="16"></td><td><b>Useful Information</b><br>Previous
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]88versions of the framework prompted for a profile name when executed.
89The profile name was used to create a directory inside <tt>.felix/</tt>
90in the user home directory. This approach allowed users to have
91different sets of bundles for different purposes, e.g., testing,
92production, etc. If this behavior is still desired, it is very easy to
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]93mimic. Modify <tt>conf/config.properties</tt> to include "<tt>felix.cache.rootdir=${user.home}/.felix</tt>". Now, if you start Felix with something like "<tt>java -jar bin/felix.jar foo</tt>", it will use "<tt>${user.home}/.felix/foo/</tt>" as the bundle cache directory, where "<tt>${user.home</tt>}" is automatically substituted with the appropriate system property by the launcher.</td></tr></tbody></table></div>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]94
95<p><a name="ApacheFelixFrameworkUsageDocumentation-frameworkshell"></a></p>
96
97<h2><a name="ApacheFelixFrameworkUsageDocumentation-FrameworkShell"></a>Framework Shell</h2>
98
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]99<p>The main way to interact with the framework is via the supplied Apache Felix Gogo shell. After starting the framework, type <tt>help</tt> into the shell to see the list of the available commands and <tt>help &lt;command-name&gt;</tt> to get help for a specific command.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]100
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]101<div class="panelMacro"><table class="infoMacro"><colgroup><col width="24"><col></colgroup><tbody><tr><td valign="top"><img src="apache-felix-framework-usage-documentation_files/information.gif" alt="" align="absmiddle" border="0" height="16" width="16"></td><td><b>Useful Information</b><br>In Gogo, command names are made up of two parts: <tt>&lt;scope&gt;:&lt;name&gt;</tt>. This is similar to a fully qualified class name in Java and is used to avoid naming collisions. If the <tt>&lt;name&gt;</tt> portion of the command is unique, then you only need to type it. If not, then you must either type the full <tt>&lt;scope&gt;:&lt;name&gt;</tt> or arrange the scope search path accordingly.</td></tr></tbody></table></div>
102
103<p>To install bundles, use the <tt>felix:install</tt> command, which is described in more detail in the next <a href="#ApacheFelixFrameworkUsageDocumentation-installingbundles">sub-section</a>. To list installed bundles, use the <tt>felix:lb</tt> command. To stop the framework type <tt>stop 0</tt>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]104to stop the System Bundle; any installed bundles will automatically be
105reloaded (and potentially restarted) the next time you launch with the
106associated cache.</p>
107
108<p><a name="ApacheFelixFrameworkUsageDocumentation-installingbundles"></a></p>
109
110<h3><a name="ApacheFelixFrameworkUsageDocumentation-InstallingBundles"></a>Installing Bundles</h3>
111
112<p>A bundle is the OSGi term for a component for the OSGi framework. A
113bundle is simply a JAR file containing a manifest and some combination
114of Java classes, embedded JAR files, native code, and resources. A
115bundle may provide some specific functionality for the user or it may
116implement a service that other bundles can use; bundles can only use
117functionality from other bundles through shared services and packages.</p>
118
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]119<p>The Felix framework distribution comes with three bundles, which are located in the <tt>bundle/</tt>
120directory of the framework distribution installation directory. These
121bundles include the Gogo Runtime (core command processing
122functionality), Gogo Shell (text-based shell user interface), Gogo
123Command (basic set of commands), and Bundle Repository (a bundle
124repository service). In addition to these bundles, the bundle
125repository provides access to other bundles for easy installation. The
126bundle repository service provides a set of shell commands in the <tt>obr:*</tt> scope; refer to the <a href="http://felix.apache.org/site/apache-felix-osgi-bundle-repository.html" title="Apache Felix OSGi Bundle Repository">Apache Felix OSGi Bundle Repository</a> for more information.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]127
128<p>Before installing any bundles, it is important to understand how
129bundles are manually deployed into the framework. Bundles are deployed
130in two stages; first they are installed, then they are started. To
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]131install a bundle use the <tt>felix:install</tt> shell command followed by a bundle URL. For example, to install a <tt>bundle.jar</tt> bundle you type:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]132
133<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]134<pre>felix:install file:/path/to/bundle/bundle.jar
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]135</pre>
136</div></div>
137
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]138<p>Once a bundle is installed, it can then be started by using the <tt>felix:start</tt> command and the bundle identifier of the desired bundle. The <tt>felix:lb</tt>
139command is used to list installed bundles and to obtain the bundle's
140identifier. The following Felix shell session illustrates how to start
141the <tt>bundle.jar</tt> bundle:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]142
143<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]144<pre>g! install file:/path/to/bundle/bundle.jar
145g! lb
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]146START LEVEL 1
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]147 ID|State |Level|Name
148 0|Active | 0|System Bundle (3.0.0)
149 1|Active | 1|Apache Felix Bundle Repository (1.6.2)
150 2|Active | 1|Apache Felix Gogo Command (0.6.0)
151 3|Active | 1|Apache Felix Gogo Runtime (0.6.0)
152 4|Active | 1|Apache Felix Gogo Shell (0.6.0)
153 5|Installed | 1|Example Bundle (1.0.0)
154g! start 5
155Hello from Bundle 5.
156g!
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]157</pre>
158</div></div>
159
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]160<p>The <tt>felix:stop</tt> command is used to stop a bundle and the <tt>felix:uninstall</tt> command is used to remove a bundle from the bundle cache. As an alternative to using the <tt>felix:install</tt> and <tt>felix:start</tt> commands explicitly, it is also possible to install and start a bundle in one step by using the <tt>felix:start</tt> command with a bundle URL.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]161
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]162<p>Bundles can be updated using the <tt>felix:update</tt> command. The
163update command allows you to specify an URL from which to retrieve the
164updated bundle, but if one is not specified it will try to update the
165bundle from the bundle's <tt>Bundle-UpdateLocation</tt> manifest attribute, if present, or the bundle's original location URL.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]166
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]167<div class="panelMacro"><table class="infoMacro"><colgroup><col width="24"><col></colgroup><tbody><tr><td valign="top"><img src="apache-felix-framework-usage-documentation_files/information.gif" alt="" align="absmiddle" border="0" height="16" width="16"></td><td><b>Useful Information</b><br>When you use <tt>felix:update</tt> or <tt>felix:uninstall</tt>,
168the changes appear to take effect immediately, but in reality the
169changes are only partially enacted. If a bundle is updated or
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]170uninstalled and it was exporting packages, these packages are not
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]171removed until the framework is refreshed using the <tt>PackageAdmin</tt> service. The Felix shell offers a convenient <tt>refresh</tt> command for this purpose. This is the correct behavior as defined by the OSGi specification.</td></tr></tbody></table></div>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]172
173<p>For an introduction to writing bundles and services, refer to the Felix bundle tutorial.</p>
174
175<p><a name="ApacheFelixFrameworkUsageDocumentation-installingbundlesproxies"></a></p>
176
177<h3><a name="ApacheFelixFrameworkUsageDocumentation-WebProxyIssueswhenInstallingBundles"></a>Web Proxy Issues when Installing Bundles</h3>
178
179<p>If you use a proxy for Web access, then you may run into difficulty
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]180using the Gogo shell to install bundles from remote URLs. To remedy
181this situation, certain system properties must be set to make the
182framework work with your proxy. These properties are:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]183
184<ul>
185 <li><tt>http.proxyHost</tt> - the name of the proxy host.</li>
186 <li><tt>http.proxyPort</tt> - the port of the proxy host.</li>
187 <li><tt>http.proxyAuth</tt>
188- the user name and password to use when connecting to the proxy; this
189string should be the user name and password separated by a colon (e.g.,
190<tt>rickhall:mypassword</tt>).</li>
191</ul>
192
193
194<p>These system properties can be set directly on the command line when starting the JVM using the standard "<tt>-D&lt;prop&gt;=&lt;value&gt;</tt>" syntax or you can put them in the <tt>lib/system.properties</tt> file of your Felix installation; see the next section on <a href="#ApacheFelixFrameworkUsageDocumentation-configuringframework">configuring Felix</a> for more information.</p>
195
196<p><a name="ApacheFelixFrameworkUsageDocumentation-autodeploy"></a></p>
197
198<h2><a name="ApacheFelixFrameworkUsageDocumentation-BundleAutoDeploy"></a>Bundle Auto-Deploy</h2>
199
200<p>To minimize the amount of configuration necessary to install bundles
201when you launch the framework, the Felix launcher uses the concept of
202an "auto-deploy" directory. The Felix launcher deploys all bundles in
203the auto-deploy directory into the framework instance during startup.
204By default, the auto-deploy directory is "<tt>bundle</tt>" in the current directory, but it can be specified on the command line like this:</p>
205
206<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
207<pre>java -jar bin/felix.jar -b /path/to/dir
208</pre>
209</div></div>
210
211<p>Specifying an auto-deploy directory replaces the default directory,
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]212it does not augment it. The framework distribution is configured to
213install and start bundles in the auto-deploy directory. Both the
214location of the auto-deploy directory and the deployment actions
215performed can be controlled by the following configuration properties,
216respectively:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]217
218<ul>
219 <li><tt>felix.auto.deploy.dir</tt> - Specifies the auto-deploy directory from which bundles are automatically deploy at framework startup. The default is the <tt>bundle/</tt> directory of the current directory.</li>
220 <li><tt>felix.auto.deploy.action</tt>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]221- Specifies the auto-deploy actions to be performed on the bundle JAR
222files found in the auto-deploy directory. The possible actions are <tt>install</tt>, <tt>update</tt>, <tt>start</tt>, and <tt>uninstall</tt>.
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]223If no actions are specified, then the auto-deploy directory is not
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]224processed (i.e., it is disabled). There is no default value for this
225property, but the default <tt>config.properties</tt> file installed with the Felix framework distribution sets the value to: <tt>install, start</tt></li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]226</ul>
227
228
229<p>The next section describes how to set and use configuration properties.</p>
230
231<p><a name="ApacheFelixFrameworkUsageDocumentation-configuringframework"></a></p>
232
233<h2><a name="ApacheFelixFrameworkUsageDocumentation-ConfiguringtheFramework"></a>Configuring the Framework</h2>
234
235<p>Both the Felix framework and the launcher use configuration
236properties to alter their default behavior. The framework can only be
237configured by passing properties into its constructor, but the launcher
238provides a mechanism to configure the framework via a property file.
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]239The framework launcher reads configuration properties from <tt>conf/config.properties</tt>. This file uses standard Java property file syntax.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]240
241<p>The launcher also supports setting system properties via the <tt>conf/system.properties</tt>
242file. This file is purely for convenience when you need to repeatedly
243set system properties when running the framework. While the framework
244itself does not look at system properties, the launcher does copy any
245framework configuration properties found in the system properties into
246the framework configuration map, also for your convenience.</p>
247
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]248<p>It is possible to specify different locations for these property files using the <tt>felix.config.properties</tt> and <tt>felix.system.properties</tt> system properties when executing the framework. For example:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]249
250<div class="preformatted panel" style="border-width: 1px;"><div class="preformattedContent panelContent">
251<pre>java -Dfelix.config.properties=file:/home/rickhall/config.properties -jar bin/felix.jar
252</pre>
253</div></div>
254
255<p>Configuration and system properties are accessible at run time via <tt>BundleContext.getProperty()</tt>, but configuration properties override system properties.</p>
256
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]257<p>The following configuration properties are for the launcher:</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]258
259<ul>
260 <li><tt>felix.auto.deploy.dir</tt> - Specifies the auto-deploy directory from which bundles are automatically deploy at framework startup. The default is the <tt>bundle/</tt> directory of the current directory.</li>
261 <li><tt>felix.auto.deploy.action</tt>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]262- Specifies a comma-delimited list of actions to be performed on bundle
263JAR files found in the auto-deploy directory. The possible actions are <tt>install</tt>, <tt>update</tt>, <tt>start</tt>, and <tt>uninstall</tt>. An undefined or blank value is equivalent to disabling auto-deploy processing.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]264 <li><tt>felix.auto.install.&lt;n&gt;</tt> - Space-delimited list of bundle URLs to automatically install when Felix is started, where <tt>&lt;n&gt;</tt> is the start level into which the bundle will be installed (e.g., <tt>felix.auto.install.2</tt>).</li>
265 <li><tt>felix.auto.start.&lt;n&gt;</tt> - Space-delimited list of bundle URLs to automatically install and start when Felix is started, where <tt>&lt;n&gt;</tt> is the start level into which the bundle will be installed (e.g., <tt>felix.auto.start.2</tt>).</li>
266 <li><tt>felix.shutdown.hook</tt>
267- Specifies whether the launcher should install a shutdown hook to
268cleanly shutdown the framework on process exit. The default value is <tt>true</tt>.</li>
269</ul>
270
271
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]272<p>The following configuration properties are for the framework (properties starting with "<tt>felix</tt>" are specific to Felix, while those starting with "<tt>org.osgi</tt>" are standard OSGi properties):</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]273
274<ul>
275 <li><tt>org.osgi.framework.storage</tt> - Sets the directory to use as the bundle cache; by default bundle cache directory is <tt>felix-cache</tt>
276in the current working directory. The value should be a valid directory
277name. The directory name can be either absolute or relative. Relative
278directory names are relative to the current working directory. The
279specified directory will be created if it does not exist.</li>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]280 <li><tt>felix.cache.rootdir</tt> - Sets the root directory used to calculate the bundle cache directory for relative directory names. If <tt>org.osgi.framework.storage</tt>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]281is set to a relative name, by default it is relative to the current
282working directory. If this property is set, then it will be calculated
283as being relative to the specified root directory.</li>
284 <li><tt>org.osgi.framework.storage.clean</tt> - Determines whether the bundle cache is flushed. The value can either be "<tt>none</tt>" or "<tt>onFirstInit</tt>", where "<tt>none</tt>" does not flush the bundle cache and "<tt>onFirstInit</tt>" flushes the bundle cache when the framework instance is first initialized. The default value is "<tt>none</tt>".</li>
285 <li><tt>felix.cache.bufsize</tt>
286- Sets the buffer size to be used by the cache; the default value is
2874096. The integer value of this string provides control over the size
288of the internal buffer of the disk cache for performance reasons.</li>
289 <li><tt>org.osgi.framework.system.packages</tt>
290- Specifies a comma-delimited list of packages that should be exported
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]291via the System Bundle from the framework class loader. The framework
292will set this to a reasonable default. If the value is specified, it
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]293replaces any default value.</li>
294 <li><tt>org.osgi.framework.system.packages.extra</tt>
295- Specifies a comma-delimited list of packages that should be exported
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]296via the System Bundle from the framework class loader in addition to
297the packages in <tt>org.osgi.framework.system.packages</tt>. The default value is empty. If a value is specified, it is appended to the list of default or specified packages in <tt>org.osgi.framework.system.packages</tt>.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]298 <li><tt>org.osgi.framework.bootdelegation</tt>
299- Specifies a comma-delimited list of packages that should be made
300implicitly available to all bundles from the parent class loader. It is
301recommended not to use this property since it breaks modularity. The
302default value is empty.</li>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]303 <li><tt>org.osgi.framework.bundle.parent</tt> - Specifies which class loader is used for boot delegation. Possible values are: <tt>boot</tt> for the boot class loader, <tt>app</tt> for the application class loader, <tt>ext</tt> for the extension class loader, and <tt>framework</tt> for the framework's class loader. The default is <tt>boot</tt>.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]304 <li><tt>felix.bootdelegation.implicit</tt>
305- Specifies whether the framework should try to guess when to
306implicitly boot delegate to ease integration with external code. The
307default value is <tt>true</tt>.</li>
308 <li><tt>felix.systembundle.activators</tt> - A <tt>List</tt> of <tt>BundleActivator</tt>
309instances that are started/stopped when the System Bundle is
310started/stopped. The specified instances will receive the System
311Bundle's <tt>BundleContext</tt> when invoked. (This property cannot be
312set in the configuration file since it requires instances; it can only
313be passed into Felix' constructor directly.)</li>
314 <li><tt>felix.log.logger</tt> - An instance of <tt>Logger</tt>
315that the framework uses as its default logger. (This property cannot be
316set in the configuration file since it requires an instance; it can
317only be passed into Felix' constructor directly.)</li>
318 <li><tt>felix.log.level</tt>
319- An integer value indicating the degree of logging reported by the
320framework; the higher the value the more logging is reported. If zero
321('0') is specified, then logging is turned off completely. The log
322levels match those specified in the OSGi Log Service (i.e., 1 = error,
3232 = warning, 3 = information, and 4 = debug). The default value is 1.</li>
324 <li><tt>org.osgi.framework.startlevel.beginning</tt> - The initial start level of the framework once it starts execution; the default value is 1.</li>
325 <li><tt>felix.startlevel.bundle</tt> - The default start level for newly installed bundles; the default value is 1.</li>
326 <li><tt>felix.service.urlhandlers</tt> - Flag to indicate whether to activate the URL Handlers service for the framework instance; the default value is "<tt>true</tt>". Activating the URL Handlers service will result in the <tt>URL.setURLStreamHandlerFactory()</tt> and <tt>URLConnection.setContentHandlerFactory()</tt> being called.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]327</ul>
328
329
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]330<p>The Felix framework distribution contains a default <tt>conf/config.properties</tt>.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]331
332<p><a name="ApacheFelixFrameworkUsageDocumentation-migrating"></a></p>
333
334<h3><a name="ApacheFelixFrameworkUsageDocumentation-MigratingfromEarlierVersions"></a>Migrating from Earlier Versions</h3>
335
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]336<p>Apache Felix Framework <tt>2.0.0</tt> introduced some configuration property changes. This section describes the differences from older versions of the framework.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]337
338<ul>
339 <li><b>Removed</b>
340 <ul>
341 <li><tt>felix.embedded.execution</tt> - No longer needed, since the framework now never calls <tt>System.exit()</tt>; the creator of the framework is now always responsible for exiting the VM.</li>
342 <li><tt>felix.strict.osgi</tt> - No longer needed, since all non-specification features have been removed.</li>
343 <li><tt>felix.cache.dir</tt> - No longer needed, since Felix no longer uses bundle cache profiles for saving sets of bundles.</li>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]344 <li><tt>felix.cache.profile</tt> - No longer needed, since the framework no longer uses bundle cache profiles for saving sets of bundles.</li>
345 <li><tt>felix.fragment.validation</tt> - No longer needed, since the framework supports fragments.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]346 </ul>
347 </li>
348 <li><b>Renamed</b>
349 <ul>
350 <li><tt>felix.cache.profiledir</tt> - The equivalent of this property is now named <tt>org.osgi.framework.storage</tt>.</li>
351 <li><tt>felix.startlevel.framework</tt> - The equivalent of this property is now named <tt>org.osgi.framework.startlevel.beginning</tt>.</li>
352 </ul>
353 </li>
354 <li><b>Introduced</b>
355 <ul>
356 <li><tt>org.osgi.framework.system.packages.extra</tt> - New property, as described above, added to align with standard framework API.</li>
357 <li><tt>org.osgi.framework.storage.clean</tt> - New property, as described above, added to align with standard framework API.</li>
358 <li><tt>felix.cache.rootdir</tt> - Introduced as a result of removing bundle profiles to help resolve relative bundle cache directories.</li>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]359 </ul>
360 </li>
361</ul>
362
363
364<p>For the most part, these changes are minor and previous behavior
365achieved from older configuration properties is either easily attained
366with the new properties or no longer necessary.</p>
367
368<p><a name="ApacheFelixFrameworkUsageDocumentation-propertysubstitution"></a></p>
369
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]370<h3><a name="ApacheFelixFrameworkUsageDocumentation-SystemPropertySubstitution"></a>System Property Substitution</h3>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]371
372<p>It is possible to use system properties to specify the values of properties in the <tt>conf/config.properties</tt> file. This is achieved through system property substitution, which is instigated by using <tt>${&lt;property&gt;</tt>} syntax, where <tt>&lt;property&gt;</tt>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]373is the name of a system property to substitute. When the properties
374file is read, any such property values are substituted as appropriate.
375It is possible to have nested system property substitution, in which
376case the inner-most property is substituted first, then the next inner
377most, until reaching the outer most.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]378
379<p><a name="ApacheFelixFrameworkUsageDocumentation-configuringbundles"></a></p>
380
381<h2><a name="ApacheFelixFrameworkUsageDocumentation-ConfiguringBundles"></a>Configuring Bundles</h2>
382
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]383<p>Some bundles use properties to configure certain aspects of their
384behavior. It is a good idea, when implementing bundles, to parameterize
385them with properties where appropriate. To learn about the
386configuration options for specific bundles, refer to the documentation
387that accompanies them.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]388
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]389<p>Bundle properties may also be defined in the <tt>conf/config.properties</tt> property file. Any property placed in this file will be accessible via <tt>BundleContext.getProperty()</tt>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]390at run time. The property file uses the standard Java property file
391syntax (i.e., attribute-value pairs). For information on changing the
392default location of this file, refer to the section on <a href="#ApacheFelixFrameworkUsageDocumentation-configuringframework">configuring Felix</a>.</p>
393
394<p><a name="ApacheFelixFrameworkUsageDocumentation-feedback"></a></p>
395
396<h2><a name="ApacheFelixFrameworkUsageDocumentation-Feedback"></a>Feedback</h2>
397
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]398<p>Subscribe to the Felix users mailing list by sending a message to <a href="mailto:users-subscribe@felix.apache.org" class="external-link" rel="nofollow">users-subscribe@felix.apache.org</a>; after subscribing, email questions or feedback to <a href="mailto:users@felix.apache.org" class="external-link" rel="nofollow">users@felix.apache.org</a>.</p>
Karl Paulsc6eda452010-02-14 22:52:56 +0000[diff] [blame]399 </div>
Karl Paulsf4ea0312010-06-06 21:55:08 +0000[diff] [blame]400 </body></html>