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Karl Pauls44987e52007-09-16 20:54:55 +00002<html><head><title>Apache Felix - Apache Felix Usage Documentation</title>
Richard S. Hall2cd5bed2007-07-16 20:32:41 +00003
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Karl Pauls44987e52007-09-16 20:54:55 +000011<ul>
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Richard S. Hall2cd5bed2007-07-16 20:32:41 +000028 <div class="main">
29<h1><a name="ApacheFelixUsageDocumentation-ApacheFelixUsageDocumentation"></a>Apache Felix Usage Documentation</h1>
30
31<ul>
32 <li><a href="#ApacheFelixUsageDocumentation-startingfelix" title="starting-felix on Apache Felix Usage Documentation">Starting Felix</a></li>
33 <li><a href="#ApacheFelixUsageDocumentation-felixshell" title="felix-shell on Apache Felix Usage Documentation">Felix Shell</a>
34 <ul>
35 <li><a href="#ApacheFelixUsageDocumentation-installingbundles" title="installing-bundles on Apache Felix Usage Documentation">Installing Bundles</a></li>
36 <li><a href="#ApacheFelixUsageDocumentation-installingbundlesproxies" title="installing-bundles-proxies on Apache Felix Usage Documentation">Web Proxy Issues when Installing Bundles</a></li>
37 </ul>
38 </li>
39 <li><a href="#ApacheFelixUsageDocumentation-configuringfelix" title="configuring-felix on Apache Felix Usage Documentation">Configuring Felix</a>
40 <ul>
41 <li><a href="#ApacheFelixUsageDocumentation-propertysubstitution" title="property-substitution on Apache Felix Usage Documentation">System Property Substitution</a></li>
42 <li><a href="#ApacheFelixUsageDocumentation-defaultshell" title="default-shell on Apache Felix Usage Documentation">Changing the Command Shell User Interface</a></li>
43 </ul>
44 </li>
45 <li><a href="#ApacheFelixUsageDocumentation-configuringbundles" title="configuring-bundles on Apache Felix Usage Documentation">Configuring Bundles</a></li>
46 <li><a href="#ApacheFelixUsageDocumentation-feedback" title="feedback on Apache Felix Usage Documentation">Feedback</a></li>
47</ul>
48
49
50<p><a name="ApacheFelixUsageDocumentation-startingfelix"></a></p>
51
52<h2><a name="ApacheFelixUsageDocumentation-StartingFelix"></a>Starting Felix</h2>
53<p>Start Felix from the installation directory by typing:</p>
54<div class="preformatted"><div class="preformattedContent">
55<pre>java -jar bin/felix.jar
56</pre>
57</div></div>
58<p>After executing the above command, you will be prompted to enter a
59profile name; a profile is a simple way to organize sets of installed
60bundles and any arbitrary name will suffice. Entering the same profile
61name for subsequent executions of Felix will restore the installed
62bundles associated with that profile. By default, Felix creates a
63directory, called <tt>.felix</tt>, in your home directory and inside
64of this directory Felix creates a separate sub-directory for each
Karl Pauls44987e52007-09-16 20:54:55 +000065profile; this behavior is configurable, see the <a href="http://felix.apache.org/site/apache-felix-bundle-cache.html" title="Apache Felix Bundle Cache">Apache Felix Bundle Cache</a>
Richard S. Hall2cd5bed2007-07-16 20:32:41 +000066document for more details. After you have specified a profile name, the
67text-based shell interface is started. It is possible to <a href="#ApacheFelixUsageDocumentation-defaultshell" title="default-shell on Apache Felix Usage Documentation">change your default shell user interface</a>.</p>
68
69<p><a name="ApacheFelixUsageDocumentation-felixshell"></a></p>
70
71<h2><a name="ApacheFelixUsageDocumentation-FelixShell"></a>Felix Shell</h2>
72<p>The main way to interact with Felix is via its shell service. Felix'
73shell service is implemented as an OSGi service that, be default, uses
74a simple text-based user interface. After starting Felix, type <tt>help</tt> into the shell to see the list of the available commands; these are the default commands:</p>
75<div class="preformatted"><div class="preformattedContent">
76<pre>bundlelevel &lt;level&gt; &lt;id&gt; ... | &lt;id&gt; - set or get bundle start level.
77cd [&lt;base-URL&gt;] - change or display base URL.
78headers [&lt;id&gt; ...] - display bundle header properties.
79help - display shell commands.
80install &lt;URL&gt; [&lt;URL&gt; ...] - install bundle(s).
81obr help - OSGi bundle repository.
82packages [&lt;id&gt; ...] - list exported packages.
83ps [-l | -u] - list installed bundles.
84refresh - refresh packages.
85services [-u] [-a] [&lt;id&gt; ...] - list registered or used services.
86shutdown - shutdown Felix.
87start &lt;id&gt; [&lt;id&gt; &lt;URL&gt; ...] - start bundle(s).
88startlevel [&lt;level&gt;] - get or set framework start level.
89stop &lt;id&gt; [&lt;id&gt; ...] - stop bundle(s).
90uninstall &lt;id&gt; [&lt;id&gt; ...] - uninstall bundle(s).
91update &lt;id&gt; [&lt;URL&gt;] - update bundle.
92version - display version of framework.
93</pre>
94</div></div>
95<p>For a detailed description of how to install bundles into Felix refer to the next <a href="#ApacheFelixUsageDocumentation-installingbundles" title="installing-bundles on Apache Felix Usage Documentation">sub-section</a>; the remainder of this section briefly describes shell behavior.</p>
96
97<p>Despite the fact that the Felix shell tries to mimic a typical Unix-like shell, it is actually quite limited. The notion of <tt>cd</tt>,
98for example, is only used to specify a default base URL in order to
99save typing. To illustrate, assume that you want to install several
100bundles from a directory on your disk, you could type:</p>
101<div class="preformatted"><div class="preformattedContent">
102<pre>cd file:/c:/projects/felix/bundle/
103</pre>
104</div></div>
105<p>After issuing this <tt>cd</tt> command, you no longer need to type
106the complete URL for bundles located in the above directory, only the
107name of the bundle JAR file is necessary. It is not possible to perform
108an equivalent <tt>ls</tt> command to list the contents of the current
109base URL, since this operation is not possible with URLs. To view all
110currently installed bundles, use the <tt>ps</tt> command.</p>
111
112<p>To exit the Felix shell, simply type <tt>shutdown</tt>; any bundles
113that are loaded will automatically be reloaded the next time you start
114the associated profile. Additionally, any bundles that are active, will
115be reactivated the next time you start the associated profile.</p>
116
117<p><a name="ApacheFelixUsageDocumentation-installingbundles"></a></p>
118
119<h3><a name="ApacheFelixUsageDocumentation-InstallingBundles"></a>Installing Bundles</h3>
120<p>A bundle is the OSGi term for a component for the OSGi framework. A
121bundle is simply a JAR file containing a manifest and some combination
122of Java classes, embedded JAR files, native code, and resources. A
123bundle may provide some specific functionality for the user or it may
124implement a service that other bundles can use; bundles can only use
125functionality from other bundles through shared services and packages.</p>
126
127<p>Felix is packaged with four bundles, which are located in the <tt>bundle/</tt>
128directory of the Felix installation directory. There are bundles for
129the Felix shell service, a text-based shell service user interface, a
130bundle repository service, and a simple example bundle. In addition to
131these bundles, the bundle repository services provides access to many
132other bundles for easy installation. The bundle repository service
Karl Pauls44987e52007-09-16 20:54:55 +0000133provides a shell command, named <tt>obr</tt>, to access available bundles; refer to the <a href="http://felix.apache.org/site/apache-felix-osgi-bundle-repository-obr.html" title="Apache Felix OSGi Bundle Repository (OBR)">Apache Felix OSGi Bundle Repository (OBR)</a> for more information.</p>
Richard S. Hall2cd5bed2007-07-16 20:32:41 +0000134
135<p>Before installing any bundles, it is important to understand how
136bundles are manually deployed into the framework. Bundles are deployed
137in two stages; first they are installed, then they are started. To
138install a bundle use the <tt>install</tt> shell command followed by a bundle URL. For example, to install the <tt>simple.jar</tt> bundle included with Felix you type (assuming you have started Felix from its installation directory):</p>
139<div class="preformatted"><div class="preformattedContent">
140<pre>install file:bundle/simple.jar
141</pre>
142</div></div>
143<p>Once a bundle is installed, it can then be started by using the <tt>start</tt> command and the bundle identifier of the desired bundle. The <tt>ps</tt>
144shell command is used to list all installed bundles and to obtain the
145bundle's identifier. The following Oscar shell session capture
146illustrates how to start the <tt>simple.jar</tt> bundle:</p>
147<div class="preformatted"><div class="preformattedContent">
148<pre>-&gt; install [file:bundle/simple]
149-&gt; ps
150START LEVEL 1
151 ID State Level Name
152[ 0] [Active ] [ 0] System Bundle (0.8.0)
153[ 1] [Active ] [ 1] Shell Service (0.8.0)
154[ 2] [Active ] [ 1] Shell TUI (0.8.0)
155[ 3] [Active ] [ 1] Bundle Repository (0.8.0)
156[ 4] [Installed ] [ 1] Simple (0.8.0)
157-&gt; start 4
158Simple bundle 4 has started.
159From native: Hello!
160From embedded JAR: Hello!
161Entry: META-INF/
162Entry: org/
163Entry: libfoo.so
164The 'javax.servlet.http' package is not available.
165The 'javax.servlet' package is not available.
166-&gt;
167</pre>
168</div></div>
169<p>The <tt>stop</tt> command is used to stop a bundle and the <tt>uninstall</tt> command is used to remove a bundle from the Felix profile. As an alternative to using the <tt>install</tt> and <tt>start</tt> commands explicitly, it is also possible to install and start a bundle in one step by using the <tt>start</tt> command with a bundle URL.</p>
170
171<p>Bundles can be updated using the <tt>update</tt> command. The update
172command allows you to specify an URL from which to retrieve the updated
173bundle, but if one is not specified it will try to update the bundle
174from the bundle's <tt>Bundle-UpdateLocation</tt> manifest attribute, if present, or the bundle's original location URL.</p>
175
176<p><b>Important:</b> When you <tt>update</tt> or <tt>uninstall</tt> a
177bundle, the changes appear to take effect immediately, but in reality
178the changes are only partially enacted. If a bundle is updated or
179uninstalled and it was exporting packages, these packages are not
180removed until the framework is refreshed using the <tt>PackageAdmin</tt> service. The Felix shell offers a convenient <tt>refresh</tt> command for this purpose.</p>
181
182<p>For an introduction to writing bundles and services, refer to the Felix bundle tutorial.</p>
183
184<p><a name="ApacheFelixUsageDocumentation-installingbundlesproxies"></a></p>
185
186<h3><a name="ApacheFelixUsageDocumentation-WebProxyIssueswhenInstallingBundles"></a>Web Proxy Issues when Installing Bundles</h3>
187<p>If you use a proxy for Web access, then you may run into difficulty
188using the Felix shell to install bundles from a remote URL. To remedy
189this situation, certain system properties must be set to make Felix
190work with your proxy. These properties are:</p>
191<ul>
192 <li><tt>http.proxyHost</tt> - the name of the proxy host.</li>
193 <li><tt>http.proxyPort</tt> - the port of the proxy host.</li>
194 <li><tt>http.proxyAuth</tt>
195- the user name and password to use when connecting to the proxy; this
196string should be the user name and password separated by a colon (e.g.,
197<tt>rickhall:mypassword</tt>).</li>
198</ul>
199
200
201<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="#ApacheFelixUsageDocumentation-configuringfelix" title="configuring-felix on Apache Felix Usage Documentation">configuring Felix</a> for more information.</p>
202
203<p><a name="ApacheFelixUsageDocumentation-configuringfelix"></a></p>
204
205<h2><a name="ApacheFelixUsageDocumentation-ConfiguringFelix"></a>Configuring Felix</h2>
206<p>Felix uses properties to configure certain aspects of its behavior. When you execute Felix using <tt>bin/felix.jar</tt> there are two property files that are consulted, they are <tt>conf/system.properties</tt> and <tt>conf/config.properties</tt> in the Felix installation directory. Both files use standard Java property file syntax.</p>
207
208<p>The <tt>conf/system.properties</tt> file provides a convenient
209mechanism for defining Java system properties, but it is largely
210ignored by Felix, since Felix does not use system properties for
211configuration purposes. Any properties placed in the <tt>conf/system.properties</tt> file are available at run time via <tt>System.getProperty()</tt> and <tt>BundleContext.getProperty()</tt>. It is also possible to specify a different location for the system properties file by using the <tt>felix.system.properties</tt> system property when executing Felix. For example:</p>
212<div class="preformatted"><div class="preformattedContent">
213<pre>java -Dfelix.system.properties=file:/home/rickhall/system.properties -jar bin/felix.jar
214</pre>
215</div></div>
216<p>When executing Felix, nearly configuration occurs using properties in the <tt>conf/config.properties</tt> file. It is possible to change the location of the configuration properties file by specifying a new location value using the <tt>felix.config.properties</tt>
217system property. It is necessary to use a system property here since
218Felix needs this value to start execution. As an example, the following
219command could be used to specify a custom location for the
220configuration properties file:</p>
221<div class="preformatted"><div class="preformattedContent">
222<pre>java -Dfelix.config.properties=file:/home/rickhall/config.properties -jar bin/felix.jar
223</pre>
224</div></div>
225<p>In this example the configuration properties will be read from the
226specified URL. All remaining configuration properties should be defined
227in the <tt>config.properties</tt> file itself. All configuration properties are accessible at run time via <tt>BundleContext.getProperty()</tt>.</p>
228
229<p>Felix does provide one other way to specify configuration
230properties, but to do so you must manually instantiate an instance of
231Felix, rather than executing Felix' JAR file. When you create your own
232instance of Felix, it is possible to pass in precise configuration
233properties to the <tt>Felix.start()</tt> method. If this approach is used, then no property files are consulted.</p>
234
235<p>The following properties describes the purpose of each Felix configuration property:</p>
236<ul>
237 <li><tt>felix.log.level</tt> - An integer value indicating the
238degree of logging reported by the framework; a higher value results in
239more logging. If zero ('0') is specified, then logging is turned off
240completely. The log levels match those specified in the OSGi Log
241Service (i.e., 1 = error, 2 = warning, 3 = information, and 4 = debug).
242The default value is 1.</li>
243 <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>
244 <li><tt>felix.auto.start</tt> - Space-delimited list of bundle URLs to automatically install and start when Oscar 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>
245 <li><tt>felix.startlevel.framework</tt> - The initial start level of the framework once it starts execution; the default value is 1.</li>
246 <li><tt>felix.startlevel.bundle</tt> - The default start level for newly installed bundles; the default value is 1.</li>
247 <li><tt>felix.service.urlhandlers</tt> - Flag to indicate whether Felix should enable the URL Handlers service, which will result in calls to <tt>URL.setURLStreamHandlerFactory()</tt> and <tt>URLConnection.setContentHandlerFactory()</tt>. The default value is "<tt>true</tt>" to enable the URL Handlers service.</li>
248 <li><tt>felix.embedded.execution</tt> - Flag to indicate whether Felix is embedded into a host application; the default value is "<tt>false</tt>". If this flag is "<tt>true</tt>" then Felix will not call <tt>System.exit()</tt> upon termination.</li>
249 <li><tt>felix.strict.osgi</tt> - Flag to indicate whether Felix is running in strict OSGi mode; the default value is "<tt>true</tt>". If this flag is "<tt>false</tt>" it currently enables a single non-OSGi-compliant feature: persisting <tt>BundleActivator</tt>s that implement <tt>Serializable</tt>. This feature is not recommended since it is non-compliant.</li>
250 <li><tt>felix.cache.bufsize</tt>
251- Sets the buffer size to be used by the bundle cache when copying JAR
252files and input streams; the default value is 4096 bytes. The integer
253value of this string provides control over the size of the internal
254buffer of the disk cache for performance reasons.</li>
255 <li><tt>felix.cache.dir</tt>
256- Sets the directory to be used by the bundle cache as its cache
257directory. The cache directory is where all profile directories are
258stored and a profile directory is where a set of installed bundles are
259stored. By default, the cache directory is <tt>.felix</tt> in the user's home directory. If this property is specified, then its value will be used as the cache directory instead of <tt>.felix</tt>. This directory will be created if it does not exist.</li>
260 <li><tt>felix.cache.profile</tt>
261- Sets the profile name that will be used to create a profile directory
262inside of the bundle cache directory. The created directory will
263contain all installed bundles associated with the profile.</li>
264 <li><tt>felix.cache.profiledir</tt>
265- Sets the directory to use as the profile directory for the bundle
266cache; by default the profile name is used to create a directory in the
267<tt>.felix</tt> bundle cache directory (more precisely <tt>${felix.cache.dir}/${felix.cache.profile</tt>}). If the <tt>felix.cache.profiledir</tt>
268property is specified, then the cache directory and profile name
269properties are ignored since they are only used to calculate the
270profile directory. The specified value of the profile directory
271property is used directly as the directory to contain all cached
272bundles. This directory will be created if it does not exist.</li>
273</ul>
274
275
276<p>The Felix installation contains a default <tt>conf/config.properties</tt> file for automatically starting the shell-related bundles.</p>
277
278<p><a name="ApacheFelixUsageDocumentation-propertysubstitution"></a></p>
279
280<h3><a name="ApacheFelixUsageDocumentation-SystemPropertySubstituion"></a>System Property Substituion</h3>
281<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>
282is the name of a system property to substitute. When such a property
283value is retrieved by a bundle, the system property value will be
284substituted into the bundle property value as appropriate.</p>
285
286<p><a name="ApacheFelixUsageDocumentation-defaultshell"></a></p>
287
288<h3><a name="ApacheFelixUsageDocumentation-ChangingtheCommandShellUserInterface"></a>Changing the Command Shell User Interface</h3>
289<p>Felix' shell service supports multiple user interface
290implementations; the default shell user interface is text-based, but a
291simple graphical shell is also available. To change the default shell
292user interface, you must download the Shell GUI and Shell GUI Plugin
293bundles. Then you must modify the <tt>felix.auto.start</tt> property in the <tt>conf/config.properties</tt> file of your Felix installation. For the text-based user interface, the property value should look like this:</p>
294<div class="preformatted"><div class="preformattedContent">
295<pre>felix.auto.start.1=file:bundle/shell.jar file:bundle/shelltui.jar \
296 file:bundle/bundlerepository.jar
297</pre>
298</div></div>
299<p>This property value instructs Felix to automatically start the shell
300service, the shell textual user interface, and the bundle repository. (<em>Note:
301The "\" character at the end of the above line indicates that the
302property value continues on the next line; it is also possible to
303specify the property value on one line.</em>) For the GUI-based shell user interface, the property value should look something like this:</p>
304<div class="preformatted"><div class="preformattedContent">
305<pre>felix.auto.start.1=file:bundle/shell.jar file:bundle/bundlerepository.jar \
306 file:bundle/shellgui.jar file:bundle/shellplugin.jar
307</pre>
308</div></div>
309<p>This property value instructs Felix to automatically start the shell
310service, the bundle repository, the shell GUI, and the shell GUI
311plugins.</p>
312
313<p><a name="ApacheFelixUsageDocumentation-configuringbundles"></a></p>
314
315<h2><a name="ApacheFelixUsageDocumentation-ConfiguringBundles"></a>Configuring Bundles</h2>
316<p>Some bundles use properties to configure certain aspects of their behavior. As an example, the default URL for the <tt>cd</tt> command of the shell service can be specified using the property <tt>felix.shell.baseurl</tt>.
317It is a good idea, when implementing bundles, to parameterize them with
318properties where appropriate. To learn about the configuration options
319for specific bundles, refer to the documentation that accompanies them.</p>
320
321<p>Bundle properties are also defined in the <tt>conf/config.properties</tt> property file. Any property placed in this file will be accessible via <tt>BundleContext.getProperty()</tt>
322at run time. The property file uses the standard Java property file
323syntax (i.e., attribute-value pairs). For information on changing the
324default location of this file, refer to the section on <a href="#ApacheFelixUsageDocumentation-configuringfelix" title="configuring-felix on Apache Felix Usage Documentation">configuring Felix</a>.</p>
325
326<p><a name="ApacheFelixUsageDocumentation-feedback"></a></p>
327
328<h2><a name="ApacheFelixUsageDocumentation-Feedback"></a>Feedback</h2>
329
Karl Pauls44987e52007-09-16 20:54:55 +0000330<p>Subscribe to the Felix users mailing list by sending a message to <span class="nobr"><a href="mailto:users-subscribe@felix.apache.org" title="Send mail to users-subscribe@felix.apache.org" rel="nofollow">users-subscribe@felix.apache.org<sup><img class="rendericon" src="apache-felix-usage-documentation_files/mail_small.gif" alt="" align="absmiddle" border="0" height="12" width="13"></sup></a></span>; after subscribing, email questions or feedback to <span class="nobr"><a href="mailto:users@felix.apache.org" title="Send mail to users@felix.apache.org" rel="nofollow">users@felix.apache.org<sup><img class="rendericon" src="apache-felix-usage-documentation_files/mail_small.gif" alt="" align="absmiddle" border="0" height="12" width="13"></sup></a></span>.</p>
Richard S. Hall2cd5bed2007-07-16 20:32:41 +0000331 </div>
Karl Pauls44987e52007-09-16 20:54:55 +0000332
333</body></html>