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apache / logging-log4j-site / 9755b12b39efbc0142688f9b1a11ec68db89f97b / . / 2.13.0 / log4j-api / xref / org / apache / logging / log4j / util / Activator.html
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<a class="jxr_linenumber" name="L1" href="#L1">1</a> <em class="jxr_comment">/*</em>
<a class="jxr_linenumber" name="L2" href="#L2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one or more</em>
<a class="jxr_linenumber" name="L3" href="#L3">3</a> <em class="jxr_comment"> * contributor license agreements. See the NOTICE file distributed with</em>
<a class="jxr_linenumber" name="L4" href="#L4">4</a> <em class="jxr_comment"> * this work for additional information regarding copyright ownership.</em>
<a class="jxr_linenumber" name="L5" href="#L5">5</a> <em class="jxr_comment"> * The ASF licenses this file to You under the Apache license, Version 2.0</em>
<a class="jxr_linenumber" name="L6" href="#L6">6</a> <em class="jxr_comment"> * (the "License"); you may not use this file except in compliance with</em>
<a class="jxr_linenumber" name="L7" href="#L7">7</a> <em class="jxr_comment"> * the License. You may obtain a copy of the License at</em>
<a class="jxr_linenumber" name="L8" href="#L8">8</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L9" href="#L9">9</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2." target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.</a>0</em>
<a class="jxr_linenumber" name="L10" href="#L10">10</a> <em class="jxr_comment"> *</em>
<a class="jxr_linenumber" name="L11" href="#L11">11</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing, software</em>
<a class="jxr_linenumber" name="L12" href="#L12">12</a> <em class="jxr_comment"> * distributed under the License is distributed on an "AS IS" BASIS,</em>
<a class="jxr_linenumber" name="L13" href="#L13">13</a> <em class="jxr_comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</em>
<a class="jxr_linenumber" name="L14" href="#L14">14</a> <em class="jxr_comment"> * See the license for the specific language governing permissions and</em>
<a class="jxr_linenumber" name="L15" href="#L15">15</a> <em class="jxr_comment"> * limitations under the license.</em>
<a class="jxr_linenumber" name="L16" href="#L16">16</a> <em class="jxr_comment"> */</em>
<a class="jxr_linenumber" name="L17" href="#L17">17</a> <strong class="jxr_keyword">package</strong> org.apache.logging.log4j.util;
<a class="jxr_linenumber" name="L18" href="#L18">18</a>
<a class="jxr_linenumber" name="L19" href="#L19">19</a> <strong class="jxr_keyword">import</strong> java.net.URL;
<a class="jxr_linenumber" name="L20" href="#L20">20</a> <strong class="jxr_keyword">import</strong> java.security.Permission;
<a class="jxr_linenumber" name="L21" href="#L21">21</a> <strong class="jxr_keyword">import</strong> java.util.Collection;
<a class="jxr_linenumber" name="L22" href="#L22">22</a> <strong class="jxr_keyword">import</strong> java.util.List;
<a class="jxr_linenumber" name="L23" href="#L23">23</a>
<a class="jxr_linenumber" name="L24" href="#L24">24</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.Logger;
<a class="jxr_linenumber" name="L25" href="#L25">25</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.spi.LoggerContextFactory;
<a class="jxr_linenumber" name="L26" href="#L26">26</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.spi.Provider;
<a class="jxr_linenumber" name="L27" href="#L27">27</a> <strong class="jxr_keyword">import</strong> org.apache.logging.log4j.status.StatusLogger;
<a class="jxr_linenumber" name="L28" href="#L28">28</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.AdaptPermission;
<a class="jxr_linenumber" name="L29" href="#L29">29</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.AdminPermission;
<a class="jxr_linenumber" name="L30" href="#L30">30</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.Bundle;
<a class="jxr_linenumber" name="L31" href="#L31">31</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.BundleActivator;
<a class="jxr_linenumber" name="L32" href="#L32">32</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.BundleContext;
<a class="jxr_linenumber" name="L33" href="#L33">33</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.BundleEvent;
<a class="jxr_linenumber" name="L34" href="#L34">34</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.InvalidSyntaxException;
<a class="jxr_linenumber" name="L35" href="#L35">35</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.ServiceReference;
<a class="jxr_linenumber" name="L36" href="#L36">36</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.SynchronousBundleListener;
<a class="jxr_linenumber" name="L37" href="#L37">37</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.wiring.BundleWire;
<a class="jxr_linenumber" name="L38" href="#L38">38</a> <strong class="jxr_keyword">import</strong> org.osgi.framework.wiring.BundleWiring;
<a class="jxr_linenumber" name="L39" href="#L39">39</a>
<a class="jxr_linenumber" name="L40" href="#L40">40</a> <em class="jxr_javadoccomment">/**</em>
<a class="jxr_linenumber" name="L41" href="#L41">41</a> <em class="jxr_javadoccomment"> * &lt;em&gt;Consider this class private.&lt;/em&gt;</em>
<a class="jxr_linenumber" name="L42" href="#L42">42</a> <em class="jxr_javadoccomment"> * OSGi bundle activator. Used for locating an implementation of</em>
<a class="jxr_linenumber" name="L43" href="#L43">43</a> <em class="jxr_javadoccomment"> * {@link org.apache.logging.log4j.spi.LoggerContextFactory} et al. that have corresponding</em>
<a class="jxr_linenumber" name="L44" href="#L44">44</a> <em class="jxr_javadoccomment"> * {@code META-INF/log4j-provider.properties} files. As with all OSGi BundleActivator classes, this class is not for</em>
<a class="jxr_linenumber" name="L45" href="#L45">45</a> <em class="jxr_javadoccomment"> * public use and is only useful in an OSGi framework environment.</em>
<a class="jxr_linenumber" name="L46" href="#L46">46</a> <em class="jxr_javadoccomment"> */</em>
<a class="jxr_linenumber" name="L47" href="#L47">47</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/logging/log4j/util/Activator.html">Activator</a> <strong class="jxr_keyword">implements</strong> BundleActivator, SynchronousBundleListener {
<a class="jxr_linenumber" name="L48" href="#L48">48</a>
<a class="jxr_linenumber" name="L49" href="#L49">49</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> SecurityManager SECURITY_MANAGER = System.getSecurityManager();
<a class="jxr_linenumber" name="L50" href="#L50">50</a>
<a class="jxr_linenumber" name="L51" href="#L51">51</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/logging/log4j/Logger.html">Logger</a> LOGGER = StatusLogger.getLogger();
<a class="jxr_linenumber" name="L52" href="#L52">52</a>
<a class="jxr_linenumber" name="L53" href="#L53">53</a> <em class="jxr_comment">// until we have at least one Provider, we'll lock ProviderUtil which locks LogManager.&lt;clinit&gt; by extension.</em>
<a class="jxr_linenumber" name="L54" href="#L54">54</a> <em class="jxr_comment">// this variable needs to be reset once the lock has been released</em>
<a class="jxr_linenumber" name="L55" href="#L55">55</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">boolean</strong> lockingProviderUtil;
<a class="jxr_linenumber" name="L56" href="#L56">56</a>
<a class="jxr_linenumber" name="L57" href="#L57">57</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">void</strong> checkPermission(<strong class="jxr_keyword">final</strong> Permission permission) {
<a class="jxr_linenumber" name="L58" href="#L58">58</a> <strong class="jxr_keyword">if</strong> (SECURITY_MANAGER != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L59" href="#L59">59</a> SECURITY_MANAGER.checkPermission(permission);
<a class="jxr_linenumber" name="L60" href="#L60">60</a> }
<a class="jxr_linenumber" name="L61" href="#L61">61</a> }
<a class="jxr_linenumber" name="L62" href="#L62">62</a>
<a class="jxr_linenumber" name="L63" href="#L63">63</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> loadProvider(<strong class="jxr_keyword">final</strong> Bundle bundle) {
<a class="jxr_linenumber" name="L64" href="#L64">64</a> <strong class="jxr_keyword">if</strong> (bundle.getState() == Bundle.UNINSTALLED) {
<a class="jxr_linenumber" name="L65" href="#L65">65</a> <strong class="jxr_keyword">return</strong>;
<a class="jxr_linenumber" name="L66" href="#L66">66</a> }
<a class="jxr_linenumber" name="L67" href="#L67">67</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="L68" href="#L68">68</a> checkPermission(<strong class="jxr_keyword">new</strong> AdminPermission(bundle, AdminPermission.RESOURCE));
<a class="jxr_linenumber" name="L69" href="#L69">69</a> checkPermission(<strong class="jxr_keyword">new</strong> AdaptPermission(BundleWiring.<strong class="jxr_keyword">class</strong>.getName(), bundle, AdaptPermission.ADAPT));
<a class="jxr_linenumber" name="L70" href="#L70">70</a> <strong class="jxr_keyword">final</strong> BundleContext bundleContext = bundle.getBundleContext();
<a class="jxr_linenumber" name="L71" href="#L71">71</a> <strong class="jxr_keyword">if</strong> (bundleContext == <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L72" href="#L72">72</a> LOGGER.debug(<span class="jxr_string">"Bundle {} has no context (state={}), skipping loading provider"</span>, bundle.getSymbolicName(), toStateString(bundle.getState()));
<a class="jxr_linenumber" name="L73" href="#L73">73</a> } <strong class="jxr_keyword">else</strong> {
<a class="jxr_linenumber" name="L74" href="#L74">74</a> loadProvider(bundleContext, bundle.adapt(BundleWiring.<strong class="jxr_keyword">class</strong>));
<a class="jxr_linenumber" name="L75" href="#L75">75</a> }
<a class="jxr_linenumber" name="L76" href="#L76">76</a> } <strong class="jxr_keyword">catch</strong> (<strong class="jxr_keyword">final</strong> SecurityException e) {
<a class="jxr_linenumber" name="L77" href="#L77">77</a> LOGGER.debug(<span class="jxr_string">"Cannot access bundle [{}] contents. Ignoring."</span>, bundle.getSymbolicName(), e);
<a class="jxr_linenumber" name="L78" href="#L78">78</a> } <strong class="jxr_keyword">catch</strong> (<strong class="jxr_keyword">final</strong> Exception e) {
<a class="jxr_linenumber" name="L79" href="#L79">79</a> LOGGER.warn(<span class="jxr_string">"Problem checking bundle {} for Log4j 2 provider."</span>, bundle.getSymbolicName(), e);
<a class="jxr_linenumber" name="L80" href="#L80">80</a> }
<a class="jxr_linenumber" name="L81" href="#L81">81</a> }
<a class="jxr_linenumber" name="L82" href="#L82">82</a>
<a class="jxr_linenumber" name="L83" href="#L83">83</a> <strong class="jxr_keyword">private</strong> String toStateString(<strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> state) {
<a class="jxr_linenumber" name="L84" href="#L84">84</a> <strong class="jxr_keyword">switch</strong> (state) {
<a class="jxr_linenumber" name="L85" href="#L85">85</a> <strong class="jxr_keyword">case</strong> Bundle.UNINSTALLED:
<a class="jxr_linenumber" name="L86" href="#L86">86</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"UNINSTALLED"</span>;
<a class="jxr_linenumber" name="L87" href="#L87">87</a> <strong class="jxr_keyword">case</strong> Bundle.INSTALLED:
<a class="jxr_linenumber" name="L88" href="#L88">88</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"INSTALLED"</span>;
<a class="jxr_linenumber" name="L89" href="#L89">89</a> <strong class="jxr_keyword">case</strong> Bundle.RESOLVED:
<a class="jxr_linenumber" name="L90" href="#L90">90</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"RESOLVED"</span>;
<a class="jxr_linenumber" name="L91" href="#L91">91</a> <strong class="jxr_keyword">case</strong> Bundle.STARTING:
<a class="jxr_linenumber" name="L92" href="#L92">92</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"STARTING"</span>;
<a class="jxr_linenumber" name="L93" href="#L93">93</a> <strong class="jxr_keyword">case</strong> Bundle.STOPPING:
<a class="jxr_linenumber" name="L94" href="#L94">94</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"STOPPING"</span>;
<a class="jxr_linenumber" name="L95" href="#L95">95</a> <strong class="jxr_keyword">case</strong> Bundle.ACTIVE:
<a class="jxr_linenumber" name="L96" href="#L96">96</a> <strong class="jxr_keyword">return</strong> <span class="jxr_string">"ACTIVE"</span>;
<a class="jxr_linenumber" name="L97" href="#L97">97</a> <strong class="jxr_keyword">default</strong>:
<a class="jxr_linenumber" name="L98" href="#L98">98</a> <strong class="jxr_keyword">return</strong> Integer.toString(state);
<a class="jxr_linenumber" name="L99" href="#L99">99</a> }
<a class="jxr_linenumber" name="L100" href="#L100">100</a> }
<a class="jxr_linenumber" name="L101" href="#L101">101</a>
<a class="jxr_linenumber" name="L102" href="#L102">102</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> loadProvider(<strong class="jxr_keyword">final</strong> BundleContext bundleContext, <strong class="jxr_keyword">final</strong> BundleWiring bundleWiring) {
<a class="jxr_linenumber" name="L103" href="#L103">103</a> <strong class="jxr_keyword">final</strong> String filter = <span class="jxr_string">"(APIVersion&gt;=2.6.0)"</span>;
<a class="jxr_linenumber" name="L104" href="#L104">104</a> <strong class="jxr_keyword">try</strong> {
<a class="jxr_linenumber" name="L105" href="#L105">105</a> <strong class="jxr_keyword">final</strong> Collection&lt;ServiceReference&lt;Provider&gt;&gt; serviceReferences = bundleContext.getServiceReferences(Provider.<strong class="jxr_keyword">class</strong>, filter);
<a class="jxr_linenumber" name="L106" href="#L106">106</a> <a href="../../../../../org/apache/logging/log4j/spi/Provider.html">Provider</a> maxProvider = <strong class="jxr_keyword">null</strong>;
<a class="jxr_linenumber" name="L107" href="#L107">107</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> ServiceReference&lt;Provider&gt; serviceReference : serviceReferences) {
<a class="jxr_linenumber" name="L108" href="#L108">108</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/logging/log4j/spi/Provider.html">Provider</a> provider = bundleContext.getService(serviceReference);
<a class="jxr_linenumber" name="L109" href="#L109">109</a> <strong class="jxr_keyword">if</strong> (maxProvider == <strong class="jxr_keyword">null</strong> || provider.getPriority() &gt; maxProvider.getPriority()) {
<a class="jxr_linenumber" name="L110" href="#L110">110</a> maxProvider = provider;
<a class="jxr_linenumber" name="L111" href="#L111">111</a> }
<a class="jxr_linenumber" name="L112" href="#L112">112</a> }
<a class="jxr_linenumber" name="L113" href="#L113">113</a> <strong class="jxr_keyword">if</strong> (maxProvider != <strong class="jxr_keyword">null</strong>) {
<a class="jxr_linenumber" name="L114" href="#L114">114</a> ProviderUtil.addProvider(maxProvider);
<a class="jxr_linenumber" name="L115" href="#L115">115</a> }
<a class="jxr_linenumber" name="L116" href="#L116">116</a> } <strong class="jxr_keyword">catch</strong> (<strong class="jxr_keyword">final</strong> InvalidSyntaxException ex) {
<a class="jxr_linenumber" name="L117" href="#L117">117</a> LOGGER.error(<span class="jxr_string">"Invalid service filter: "</span> + filter, ex);
<a class="jxr_linenumber" name="L118" href="#L118">118</a> }
<a class="jxr_linenumber" name="L119" href="#L119">119</a> <strong class="jxr_keyword">final</strong> List&lt;URL&gt; urls = bundleWiring.findEntries(<span class="jxr_string">"META-INF"</span>, <span class="jxr_string">"log4j-provider.properties"</span>, 0);
<a class="jxr_linenumber" name="L120" href="#L120">120</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> URL url : urls) {
<a class="jxr_linenumber" name="L121" href="#L121">121</a> ProviderUtil.loadProvider(url, bundleWiring.getClassLoader());
<a class="jxr_linenumber" name="L122" href="#L122">122</a> }
<a class="jxr_linenumber" name="L123" href="#L123">123</a> }
<a class="jxr_linenumber" name="L124" href="#L124">124</a>
<a class="jxr_linenumber" name="L125" href="#L125">125</a> @Override
<a class="jxr_linenumber" name="L126" href="#L126">126</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> start(<strong class="jxr_keyword">final</strong> BundleContext bundleContext) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="L127" href="#L127">127</a> ProviderUtil.STARTUP_LOCK.lock();
<a class="jxr_linenumber" name="L128" href="#L128">128</a> lockingProviderUtil = <strong class="jxr_keyword">true</strong>;
<a class="jxr_linenumber" name="L129" href="#L129">129</a> <strong class="jxr_keyword">final</strong> BundleWiring self = bundleContext.getBundle().adapt(BundleWiring.<strong class="jxr_keyword">class</strong>);
<a class="jxr_linenumber" name="L130" href="#L130">130</a> <strong class="jxr_keyword">final</strong> List&lt;BundleWire&gt; required = self.getRequiredWires(LoggerContextFactory.<strong class="jxr_keyword">class</strong>.getName());
<a class="jxr_linenumber" name="L131" href="#L131">131</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> BundleWire wire : required) {
<a class="jxr_linenumber" name="L132" href="#L132">132</a> loadProvider(bundleContext, wire.getProviderWiring());
<a class="jxr_linenumber" name="L133" href="#L133">133</a> }
<a class="jxr_linenumber" name="L134" href="#L134">134</a> bundleContext.addBundleListener(<strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="L135" href="#L135">135</a> <strong class="jxr_keyword">final</strong> Bundle[] bundles = bundleContext.getBundles();
<a class="jxr_linenumber" name="L136" href="#L136">136</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">final</strong> Bundle bundle : bundles) {
<a class="jxr_linenumber" name="L137" href="#L137">137</a> loadProvider(bundle);
<a class="jxr_linenumber" name="L138" href="#L138">138</a> }
<a class="jxr_linenumber" name="L139" href="#L139">139</a> unlockIfReady();
<a class="jxr_linenumber" name="L140" href="#L140">140</a> }
<a class="jxr_linenumber" name="L141" href="#L141">141</a>
<a class="jxr_linenumber" name="L142" href="#L142">142</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">void</strong> unlockIfReady() {
<a class="jxr_linenumber" name="L143" href="#L143">143</a> <strong class="jxr_keyword">if</strong> (lockingProviderUtil &amp;&amp; !ProviderUtil.PROVIDERS.isEmpty()) {
<a class="jxr_linenumber" name="L144" href="#L144">144</a> ProviderUtil.STARTUP_LOCK.unlock();
<a class="jxr_linenumber" name="L145" href="#L145">145</a> lockingProviderUtil = false;
<a class="jxr_linenumber" name="L146" href="#L146">146</a> }
<a class="jxr_linenumber" name="L147" href="#L147">147</a> }
<a class="jxr_linenumber" name="L148" href="#L148">148</a>
<a class="jxr_linenumber" name="L149" href="#L149">149</a> @Override
<a class="jxr_linenumber" name="L150" href="#L150">150</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> stop(<strong class="jxr_keyword">final</strong> BundleContext bundleContext) <strong class="jxr_keyword">throws</strong> Exception {
<a class="jxr_linenumber" name="L151" href="#L151">151</a> bundleContext.removeBundleListener(<strong class="jxr_keyword">this</strong>);
<a class="jxr_linenumber" name="L152" href="#L152">152</a> unlockIfReady();
<a class="jxr_linenumber" name="L153" href="#L153">153</a> }
<a class="jxr_linenumber" name="L154" href="#L154">154</a>
<a class="jxr_linenumber" name="L155" href="#L155">155</a> @Override
<a class="jxr_linenumber" name="L156" href="#L156">156</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> bundleChanged(<strong class="jxr_keyword">final</strong> BundleEvent event) {
<a class="jxr_linenumber" name="L157" href="#L157">157</a> <strong class="jxr_keyword">switch</strong> (event.getType()) {
<a class="jxr_linenumber" name="L158" href="#L158">158</a> <strong class="jxr_keyword">case</strong> BundleEvent.STARTED:
<a class="jxr_linenumber" name="L159" href="#L159">159</a> loadProvider(event.getBundle());
<a class="jxr_linenumber" name="L160" href="#L160">160</a> unlockIfReady();
<a class="jxr_linenumber" name="L161" href="#L161">161</a> <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="L162" href="#L162">162</a>
<a class="jxr_linenumber" name="L163" href="#L163">163</a> <strong class="jxr_keyword">default</strong>:
<a class="jxr_linenumber" name="L164" href="#L164">164</a> <strong class="jxr_keyword">break</strong>;
<a class="jxr_linenumber" name="L165" href="#L165">165</a> }
<a class="jxr_linenumber" name="L166" href="#L166">166</a> }
<a class="jxr_linenumber" name="L167" href="#L167">167</a>
<a class="jxr_linenumber" name="L168" href="#L168">168</a> }
</pre>
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