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| <a name="1" href="#1">1</a> <em class="jxr_comment">/*</em> |
| <a name="2" href="#2">2</a> <em class="jxr_comment"> * Licensed to the Apache Software Foundation (ASF) under one</em> |
| <a name="3" href="#3">3</a> <em class="jxr_comment"> * or more contributor license agreements. See the NOTICE file</em> |
| <a name="4" href="#4">4</a> <em class="jxr_comment"> * distributed with this work for additional information</em> |
| <a name="5" href="#5">5</a> <em class="jxr_comment"> * regarding copyright ownership. The ASF licenses this file</em> |
| <a name="6" href="#6">6</a> <em class="jxr_comment"> * to you under the Apache License, Version 2.0 (the</em> |
| <a name="7" href="#7">7</a> <em class="jxr_comment"> * "License"); you may not use this file except in compliance</em> |
| <a name="8" href="#8">8</a> <em class="jxr_comment"> * with the License. You may obtain a copy of the License at</em> |
| <a name="9" href="#9">9</a> <em class="jxr_comment"> *</em> |
| <a name="10" href="#10">10</a> <em class="jxr_comment"> * <a href="http://www.apache.org/licenses/LICENSE-2.0" target="alexandria_uri">http://www.apache.org/licenses/LICENSE-2.0</a></em> |
| <a name="11" href="#11">11</a> <em class="jxr_comment"> *</em> |
| <a name="12" href="#12">12</a> <em class="jxr_comment"> * Unless required by applicable law or agreed to in writing,</em> |
| <a name="13" href="#13">13</a> <em class="jxr_comment"> * software distributed under the License is distributed on an</em> |
| <a name="14" href="#14">14</a> <em class="jxr_comment"> * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY</em> |
| <a name="15" href="#15">15</a> <em class="jxr_comment"> * KIND, either express or implied. See the License for the</em> |
| <a name="16" href="#16">16</a> <em class="jxr_comment"> * specific language governing permissions and limitations</em> |
| <a name="17" href="#17">17</a> <em class="jxr_comment"> * under the License.</em> |
| <a name="18" href="#18">18</a> <em class="jxr_comment"> */</em> |
| <a name="19" href="#19">19</a> <strong class="jxr_keyword">package</strong> org.apache.shiro.event.support; |
| <a name="20" href="#20">20</a> |
| <a name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.apache.shiro.event.EventBus; |
| <a name="22" href="#22">22</a> <strong class="jxr_keyword">import</strong> org.slf4j.Logger; |
| <a name="23" href="#23">23</a> <strong class="jxr_keyword">import</strong> org.slf4j.LoggerFactory; |
| <a name="24" href="#24">24</a> |
| <a name="25" href="#25">25</a> <strong class="jxr_keyword">import</strong> java.util.ArrayList; |
| <a name="26" href="#26">26</a> <strong class="jxr_keyword">import</strong> java.util.Collections; |
| <a name="27" href="#27">27</a> <strong class="jxr_keyword">import</strong> java.util.HashSet; |
| <a name="28" href="#28">28</a> <strong class="jxr_keyword">import</strong> java.util.LinkedHashMap; |
| <a name="29" href="#29">29</a> <strong class="jxr_keyword">import</strong> java.util.List; |
| <a name="30" href="#30">30</a> <strong class="jxr_keyword">import</strong> java.util.Map; |
| <a name="31" href="#31">31</a> <strong class="jxr_keyword">import</strong> java.util.Set; |
| <a name="32" href="#32">32</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.Lock; |
| <a name="33" href="#33">33</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.locks.ReentrantReadWriteLock; |
| <a name="34" href="#34">34</a> |
| <a name="35" href="#35">35</a> <em class="jxr_javadoccomment">/**</em> |
| <a name="36" href="#36">36</a> <em class="jxr_javadoccomment"> * A default event bus implementation that synchronously publishes events to registered listeners. Listeners can be</em> |
| <a name="37" href="#37">37</a> <em class="jxr_javadoccomment"> * registered or unregistered for events as necessary.</em> |
| <a name="38" href="#38">38</a> <em class="jxr_javadoccomment"> * <p/></em> |
| <a name="39" href="#39">39</a> <em class="jxr_javadoccomment"> * An event bus enables a publish/subscribe paradigm within Shiro - components can publish or consume events they</em> |
| <a name="40" href="#40">40</a> <em class="jxr_javadoccomment"> * find relevant without needing to be tightly coupled to other components. This affords great</em> |
| <a name="41" href="#41">41</a> <em class="jxr_javadoccomment"> * flexibility within Shiro by promoting loose coupling and high cohesion between components and a much safer</em> |
| <a name="42" href="#42">42</a> <em class="jxr_javadoccomment"> * pluggable architecture that is more resilient to change over time.</em> |
| <a name="43" href="#43">43</a> <em class="jxr_javadoccomment"> * <h2>Sending Events</h2></em> |
| <a name="44" href="#44">44</a> <em class="jxr_javadoccomment"> * If a component wishes to publish events to other components:</em> |
| <a name="45" href="#45">45</a> <em class="jxr_javadoccomment"> * <pre></em> |
| <a name="46" href="#46">46</a> <em class="jxr_javadoccomment"> * MyEvent myEvent = createMyEvent();</em> |
| <a name="47" href="#47">47</a> <em class="jxr_javadoccomment"> * eventBus.publish(myEvent);</em> |
| <a name="48" href="#48">48</a> <em class="jxr_javadoccomment"> * </pre></em> |
| <a name="49" href="#49">49</a> <em class="jxr_javadoccomment"> * The event bus will determine the type of event and then dispatch the event to components that wish to receive</em> |
| <a name="50" href="#50">50</a> <em class="jxr_javadoccomment"> * events of that type.</em> |
| <a name="51" href="#51">51</a> <em class="jxr_javadoccomment"> * <h2>Receiving Events</h2></em> |
| <a name="52" href="#52">52</a> <em class="jxr_javadoccomment"> * A component can receive events of interest by doing the following.</em> |
| <a name="53" href="#53">53</a> <em class="jxr_javadoccomment"> * <ol></em> |
| <a name="54" href="#54">54</a> <em class="jxr_javadoccomment"> * <li>For each type of event you wish to consume, create a public method that accepts a single event argument.</em> |
| <a name="55" href="#55">55</a> <em class="jxr_javadoccomment"> * The method argument type indicates the type of event to receive.</li></em> |
| <a name="56" href="#56">56</a> <em class="jxr_javadoccomment"> * <li>Annotate each of these public methods with the {@link org.apache.shiro.event.Subscribe Subscribe} annotation.</li></em> |
| <a name="57" href="#57">57</a> <em class="jxr_javadoccomment"> * <li>Register the component with the event bus:</em> |
| <a name="58" href="#58">58</a> <em class="jxr_javadoccomment"> * <pre></em> |
| <a name="59" href="#59">59</a> <em class="jxr_javadoccomment"> * eventBus.register(myComponent);</em> |
| <a name="60" href="#60">60</a> <em class="jxr_javadoccomment"> * </pre></em> |
| <a name="61" href="#61">61</a> <em class="jxr_javadoccomment"> * </li></em> |
| <a name="62" href="#62">62</a> <em class="jxr_javadoccomment"> * </ol></em> |
| <a name="63" href="#63">63</a> <em class="jxr_javadoccomment"> * After registering the component, when when an event of a respective type is published, the component's</em> |
| <a name="64" href="#64">64</a> <em class="jxr_javadoccomment"> * {@code Subscribe}-annotated method(s) will be invoked as expected.</em> |
| <a name="65" href="#65">65</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="66" href="#66">66</a> <em class="jxr_javadoccomment"> * This design (and its constituent helper components) was largely influenced by</em> |
| <a name="67" href="#67">67</a> <em class="jxr_javadoccomment"> * Guava's <a href="<a href="http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/eventbus/EventBus.html" target="alexandria_uri">http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/eventbus/EventBus.html</a>">EventBus</a></em> |
| <a name="68" href="#68">68</a> <em class="jxr_javadoccomment"> * concept, although no code was shared/imported (even though Guava is Apache 2.0 licensed and could have</em> |
| <a name="69" href="#69">69</a> <em class="jxr_javadoccomment"> * been used).</em> |
| <a name="70" href="#70">70</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="71" href="#71">71</a> <em class="jxr_javadoccomment"> * This implementation is thread-safe and may be used concurrently.</em> |
| <a name="72" href="#72">72</a> <em class="jxr_javadoccomment"> *</em> |
| <a name="73" href="#73">73</a> <em class="jxr_javadoccomment"> * @since 1.3</em> |
| <a name="74" href="#74">74</a> <em class="jxr_javadoccomment"> */</em> |
| <a name="75" href="#75">75</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">DefaultEventBus</a> implements <a href="../../../../../org/apache/shiro/event/EventBus.html">EventBus</a> { |
| <a name="76" href="#76">76</a> |
| <a name="77" href="#77">77</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Logger log = LoggerFactory.getLogger(DefaultEventBus.<strong class="jxr_keyword">class</strong>); |
| <a name="78" href="#78">78</a> |
| <a name="79" href="#79">79</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> String EVENT_LISTENER_ERROR_MSG = <span class="jxr_string">"Event listener processing failed. Listeners should "</span> + |
| <a name="80" href="#80">80</a> <span class="jxr_string">"generally handle exceptions directly and not propagate to the event bus."</span>; |
| <a name="81" href="#81">81</a> |
| <a name="82" href="#82">82</a> <em class="jxr_comment">//this is stateless, we can retain a static final reference:</em> |
| <a name="83" href="#83">83</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/shiro/event/support/EventListenerComparator.html">EventListenerComparator</a> EVENT_LISTENER_COMPARATOR = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/shiro/event/support/EventListenerComparator.html">EventListenerComparator</a>(); |
| <a name="84" href="#84">84</a> |
| <a name="85" href="#85">85</a> <strong class="jxr_keyword">private</strong> <a href="../../../../../org/apache/shiro/event/support/EventListenerResolver.html">EventListenerResolver</a> eventListenerResolver; |
| <a name="86" href="#86">86</a> |
| <a name="87" href="#87">87</a> <em class="jxr_comment">//We want to preserve registration order to deliver events to objects in the order that they are registered</em> |
| <a name="88" href="#88">88</a> <em class="jxr_comment">//with the event bus. This has the nice effect that any Shiro system-level components that are registered first</em> |
| <a name="89" href="#89">89</a> <em class="jxr_comment">//(likely to happen upon startup) have precedence over those registered by end-user components later.</em> |
| <a name="90" href="#90">90</a> <em class="jxr_comment">//</em> |
| <a name="91" href="#91">91</a> <em class="jxr_comment">//One might think that this could have been done by just using a ConcurrentSkipListMap (which is available only on</em> |
| <a name="92" href="#92">92</a> <em class="jxr_comment">//JDK 6 or later). However, this approach requires the implementation of a Comparator to sort elements, and this</em> |
| <a name="93" href="#93">93</a> <em class="jxr_comment">//surfaces a problem: for any given random event listener, there isn't any guaranteed property to exist that can be</em> |
| <a name="94" href="#94">94</a> <em class="jxr_comment">//inspected to determine order of registration, since registration order is an artifact of this EventBus</em> |
| <a name="95" href="#95">95</a> <em class="jxr_comment">//implementation, not the listeners themselves.</em> |
| <a name="96" href="#96">96</a> <em class="jxr_comment">//</em> |
| <a name="97" href="#97">97</a> <em class="jxr_comment">//Therefore, we use a simple concurrent lock to wrap a LinkedHashMap - the LinkedHashMap retains insertion order</em> |
| <a name="98" href="#98">98</a> <em class="jxr_comment">//and the lock provides thread-safety in probably a much simpler mechanism than attempting to write a</em> |
| <a name="99" href="#99">99</a> <em class="jxr_comment">//EventBus-specific Comparator. This technique is also likely to be faster than a ConcurrentSkipListMap, which</em> |
| <a name="100" href="#100">100</a> <em class="jxr_comment">//is about 3-5 times slower than a standard ConcurrentMap.</em> |
| <a name="101" href="#101">101</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Map<Object, Subscription> registry; |
| <a name="102" href="#102">102</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Lock registryReadLock; |
| <a name="103" href="#103">103</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Lock registryWriteLock; |
| <a name="104" href="#104">104</a> |
| <a name="105" href="#105">105</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">DefaultEventBus</a>() { |
| <a name="106" href="#106">106</a> <strong class="jxr_keyword">this</strong>.registry = <strong class="jxr_keyword">new</strong> LinkedHashMap<Object, Subscription>(); <em class="jxr_comment">//not thread safe, so we need locks:</em> |
| <a name="107" href="#107">107</a> ReentrantReadWriteLock rwl = <strong class="jxr_keyword">new</strong> ReentrantReadWriteLock(); |
| <a name="108" href="#108">108</a> <strong class="jxr_keyword">this</strong>.registryReadLock = rwl.readLock(); |
| <a name="109" href="#109">109</a> <strong class="jxr_keyword">this</strong>.registryWriteLock = rwl.writeLock(); |
| <a name="110" href="#110">110</a> <strong class="jxr_keyword">this</strong>.eventListenerResolver = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/shiro/event/support/AnnotationEventListenerResolver.html">AnnotationEventListenerResolver</a>(); |
| <a name="111" href="#111">111</a> } |
| <a name="112" href="#112">112</a> |
| <a name="113" href="#113">113</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/shiro/event/support/EventListenerResolver.html">EventListenerResolver</a> getEventListenerResolver() { |
| <a name="114" href="#114">114</a> <strong class="jxr_keyword">return</strong> eventListenerResolver; |
| <a name="115" href="#115">115</a> } |
| <a name="116" href="#116">116</a> |
| <a name="117" href="#117">117</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> setEventListenerResolver(<a href="../../../../../org/apache/shiro/event/support/EventListenerResolver.html">EventListenerResolver</a> eventListenerResolver) { |
| <a name="118" href="#118">118</a> <strong class="jxr_keyword">this</strong>.eventListenerResolver = eventListenerResolver; |
| <a name="119" href="#119">119</a> } |
| <a name="120" href="#120">120</a> |
| <a name="121" href="#121">121</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> publish(Object event) { |
| <a name="122" href="#122">122</a> <strong class="jxr_keyword">if</strong> (event == <strong class="jxr_keyword">null</strong>) { |
| <a name="123" href="#123">123</a> log.info(<span class="jxr_string">"Received null event for publishing. Ignoring and returning."</span>); |
| <a name="124" href="#124">124</a> <strong class="jxr_keyword">return</strong>; |
| <a name="125" href="#125">125</a> } |
| <a name="126" href="#126">126</a> |
| <a name="127" href="#127">127</a> registryReadLock.lock(); |
| <a name="128" href="#128">128</a> <strong class="jxr_keyword">try</strong> { |
| <a name="129" href="#129">129</a> <em class="jxr_comment">//performing the entire iteration within the lock will be a slow operation if the registry has a lot of</em> |
| <a name="130" href="#130">130</a> <em class="jxr_comment">//contention. However, it is expected that the very large majority of cases the registry will be</em> |
| <a name="131" href="#131">131</a> <em class="jxr_comment">//read-mostly with very little writes (registrations or removals) occurring during a typical application</em> |
| <a name="132" href="#132">132</a> <em class="jxr_comment">//lifetime.</em> |
| <a name="133" href="#133">133</a> <em class="jxr_comment">//</em> |
| <a name="134" href="#134">134</a> <em class="jxr_comment">//The alternative would be to copy the registry.values() collection to a new LinkedHashSet within the lock</em> |
| <a name="135" href="#135">135</a> <em class="jxr_comment">//only and the iteration on this new collection could be outside the lock. This has the performance penalty</em> |
| <a name="136" href="#136">136</a> <em class="jxr_comment">//however of always creating a new collection every time an event is published, which could be more</em> |
| <a name="137" href="#137">137</a> <em class="jxr_comment">//costly for the majority of applications, especially if the number of listeners is large.</em> |
| <a name="138" href="#138">138</a> <em class="jxr_comment">//</em> |
| <a name="139" href="#139">139</a> <em class="jxr_comment">//Finally, the read lock is re-entrant, so multiple publish calls will be</em> |
| <a name="140" href="#140">140</a> <em class="jxr_comment">//concurrent without penalty since publishing is a read-only operation on the registry.</em> |
| <a name="141" href="#141">141</a> |
| <a name="142" href="#142">142</a> <strong class="jxr_keyword">for</strong> (Subscription subscription : <strong class="jxr_keyword">this</strong>.registry.values()) { |
| <a name="143" href="#143">143</a> subscription.onEvent(event); |
| <a name="144" href="#144">144</a> } |
| <a name="145" href="#145">145</a> } <strong class="jxr_keyword">finally</strong> { |
| <a name="146" href="#146">146</a> registryReadLock.unlock(); |
| <a name="147" href="#147">147</a> } |
| <a name="148" href="#148">148</a> } |
| <a name="149" href="#149">149</a> |
| <a name="150" href="#150">150</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> register(Object instance) { |
| <a name="151" href="#151">151</a> <strong class="jxr_keyword">if</strong> (instance == <strong class="jxr_keyword">null</strong>) { |
| <a name="152" href="#152">152</a> log.info(<span class="jxr_string">"Received null instance for event listener registration. Ignoring registration request."</span>); |
| <a name="153" href="#153">153</a> <strong class="jxr_keyword">return</strong>; |
| <a name="154" href="#154">154</a> } |
| <a name="155" href="#155">155</a> |
| <a name="156" href="#156">156</a> unregister(instance); |
| <a name="157" href="#157">157</a> |
| <a name="158" href="#158">158</a> List<EventListener> listeners = getEventListenerResolver().getEventListeners(instance); |
| <a name="159" href="#159">159</a> |
| <a name="160" href="#160">160</a> <strong class="jxr_keyword">if</strong> (listeners == <strong class="jxr_keyword">null</strong> || listeners.isEmpty()) { |
| <a name="161" href="#161">161</a> log.warn(<span class="jxr_string">"Unable to resolve event listeners for subscriber instance [{}]. Ignoring registration request."</span>, |
| <a name="162" href="#162">162</a> instance); |
| <a name="163" href="#163">163</a> <strong class="jxr_keyword">return</strong>; |
| <a name="164" href="#164">164</a> } |
| <a name="165" href="#165">165</a> |
| <a name="166" href="#166">166</a> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">Subscription</a> subscription = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">Subscription</a>(listeners); |
| <a name="167" href="#167">167</a> |
| <a name="168" href="#168">168</a> <strong class="jxr_keyword">this</strong>.registryWriteLock.lock(); |
| <a name="169" href="#169">169</a> <strong class="jxr_keyword">try</strong> { |
| <a name="170" href="#170">170</a> <strong class="jxr_keyword">this</strong>.registry.put(instance, subscription); |
| <a name="171" href="#171">171</a> } <strong class="jxr_keyword">finally</strong> { |
| <a name="172" href="#172">172</a> <strong class="jxr_keyword">this</strong>.registryWriteLock.unlock(); |
| <a name="173" href="#173">173</a> } |
| <a name="174" href="#174">174</a> } |
| <a name="175" href="#175">175</a> |
| <a name="176" href="#176">176</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> unregister(Object instance) { |
| <a name="177" href="#177">177</a> <strong class="jxr_keyword">if</strong> (instance == <strong class="jxr_keyword">null</strong>) { |
| <a name="178" href="#178">178</a> <strong class="jxr_keyword">return</strong>; |
| <a name="179" href="#179">179</a> } |
| <a name="180" href="#180">180</a> <strong class="jxr_keyword">this</strong>.registryWriteLock.lock(); |
| <a name="181" href="#181">181</a> <strong class="jxr_keyword">try</strong> { |
| <a name="182" href="#182">182</a> <strong class="jxr_keyword">this</strong>.registry.remove(instance); |
| <a name="183" href="#183">183</a> } <strong class="jxr_keyword">finally</strong> { |
| <a name="184" href="#184">184</a> <strong class="jxr_keyword">this</strong>.registryWriteLock.unlock(); |
| <a name="185" href="#185">185</a> } |
| <a name="186" href="#186">186</a> } |
| <a name="187" href="#187">187</a> |
| <a name="188" href="#188">188</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">Subscription</a> { |
| <a name="189" href="#189">189</a> |
| <a name="190" href="#190">190</a> <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> List<EventListener> listeners; |
| <a name="191" href="#191">191</a> |
| <a name="192" href="#192">192</a> <strong class="jxr_keyword">public</strong> <a href="../../../../../org/apache/shiro/event/support/DefaultEventBus.html">Subscription</a>(List<EventListener> listeners) { |
| <a name="193" href="#193">193</a> List<EventListener> toSort = <strong class="jxr_keyword">new</strong> ArrayList<EventListener>(listeners); |
| <a name="194" href="#194">194</a> Collections.sort(toSort, EVENT_LISTENER_COMPARATOR); |
| <a name="195" href="#195">195</a> <strong class="jxr_keyword">this</strong>.listeners = toSort; |
| <a name="196" href="#196">196</a> } |
| <a name="197" href="#197">197</a> |
| <a name="198" href="#198">198</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> onEvent(Object event) { |
| <a name="199" href="#199">199</a> |
| <a name="200" href="#200">200</a> Set<Object> delivered = <strong class="jxr_keyword">new</strong> HashSet<Object>(); |
| <a name="201" href="#201">201</a> |
| <a name="202" href="#202">202</a> <strong class="jxr_keyword">for</strong> (EventListener listener : <strong class="jxr_keyword">this</strong>.listeners) { |
| <a name="203" href="#203">203</a> Object target = listener; |
| <a name="204" href="#204">204</a> <strong class="jxr_keyword">if</strong> (listener instanceof SingleArgumentMethodEventListener) { |
| <a name="205" href="#205">205</a> <a href="../../../../../org/apache/shiro/event/support/SingleArgumentMethodEventListener.html">SingleArgumentMethodEventListener</a> singleArgListener = (SingleArgumentMethodEventListener) listener; |
| <a name="206" href="#206">206</a> target = singleArgListener.getTarget(); |
| <a name="207" href="#207">207</a> } |
| <a name="208" href="#208">208</a> <strong class="jxr_keyword">if</strong> (listener.accepts(event) && !delivered.contains(target)) { |
| <a name="209" href="#209">209</a> <strong class="jxr_keyword">try</strong> { |
| <a name="210" href="#210">210</a> listener.onEvent(event); |
| <a name="211" href="#211">211</a> } <strong class="jxr_keyword">catch</strong> (Throwable t) { |
| <a name="212" href="#212">212</a> log.warn(EVENT_LISTENER_ERROR_MSG, t); |
| <a name="213" href="#213">213</a> } |
| <a name="214" href="#214">214</a> delivered.add(target); |
| <a name="215" href="#215">215</a> } |
| <a name="216" href="#216">216</a> } |
| <a name="217" href="#217">217</a> } |
| <a name="218" href="#218">218</a> } |
| <a name="219" href="#219">219</a> } |
| </pre> |
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