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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<div class="title">/home/koen/project/wt/public-git/wt/examples/simplechat/SimpleChatServer.C</div>  </div>
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<a href="SimpleChatServer_8C.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2008 Emweb bvba, Heverlee, Belgium.</span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * See the LICENSE file for terms of use.</span>
<a name="l00005"></a>00005 <span class="comment"> */</span>
<a name="l00006"></a>00006 
<a name="l00007"></a>00007 <span class="preprocessor">#include &quot;<a class="code" href="SimpleChatServer_8h.html">SimpleChatServer.h</a>&quot;</span>
<a name="l00008"></a>00008 <span class="preprocessor">#include &lt;Wt/WServer&gt;</span>
<a name="l00009"></a>00009 
<a name="l00010"></a>00010 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00011"></a>00011 <span class="preprocessor">#include &lt;boost/lexical_cast.hpp&gt;</span>
<a name="l00012"></a>00012 
<a name="l00013"></a>00013 <span class="keyword">using namespace </span>Wt;
<a name="l00014"></a>00014 
<a name="l00015"></a><a class="code" href="classChatEvent.html#a459911a1ba1c3e793c6c797e534691b7">00015</a> <span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a> <a class="code" href="classChatEvent.html#a459911a1ba1c3e793c6c797e534691b7" title="Get the message formatted as HTML, rendered for the given user.">ChatEvent::formattedHTML</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; user,
<a name="l00016"></a>00016                                        <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/namespaceWt.html#a140dea437d52d3d7c438ea3bd16a1480">TextFormat</a> format)<span class="keyword"> const</span>
<a name="l00017"></a>00017 <span class="keyword"></span>{
<a name="l00018"></a>00018   <span class="keywordflow">switch</span> (type_) {
<a name="l00019"></a>00019   <span class="keywordflow">case</span> Login:
<a name="l00020"></a>00020     <span class="keywordflow">return</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html#a17afc7c43b5b7a710047be4a2c639575">WString::fromUTF8</a>(<span class="stringliteral">&quot;&lt;span class=&#39;chat-info&#39;&gt;&quot;</span>)
<a name="l00021"></a>00021       + <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(user_) + <span class="stringliteral">&quot; joined.&lt;/span&gt;&quot;</span>;
<a name="l00022"></a>00022   <span class="keywordflow">case</span> Logout:
<a name="l00023"></a>00023     <span class="keywordflow">return</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html#a17afc7c43b5b7a710047be4a2c639575">WString::fromUTF8</a>(<span class="stringliteral">&quot;&lt;span class=&#39;chat-info&#39;&gt;&quot;</span>)
<a name="l00024"></a>00024       + ((user == user_) ?
<a name="l00025"></a>00025          <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html#a17afc7c43b5b7a710047be4a2c639575">WString::fromUTF8</a>(<span class="stringliteral">&quot;You&quot;</span>) :
<a name="l00026"></a>00026          <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(user_))
<a name="l00027"></a>00027       + <span class="stringliteral">&quot; logged out.&lt;/span&gt;&quot;</span>;
<a name="l00028"></a>00028   <span class="keywordflow">case</span> Rename:
<a name="l00029"></a>00029     <span class="keywordflow">return</span> <span class="stringliteral">&quot;&lt;span class=&#39;chat-info&#39;&gt;&quot;</span>
<a name="l00030"></a>00030       + ((user == data_ || user == user_) ?
<a name="l00031"></a>00031          <span class="stringliteral">&quot;You are&quot;</span> :
<a name="l00032"></a>00032          (<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(user_) + <span class="stringliteral">&quot; is&quot;</span>)) 
<a name="l00033"></a>00033       + <span class="stringliteral">&quot; now known as &quot;</span> + <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(data_) + <span class="stringliteral">&quot;.&lt;/span&gt;&quot;</span>;
<a name="l00034"></a>00034   <span class="keywordflow">case</span> Message:{
<a name="l00035"></a>00035     <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a> result;
<a name="l00036"></a>00036 
<a name="l00037"></a>00037     result = <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>(<span class="stringliteral">&quot;&lt;span class=&#39;&quot;</span>)
<a name="l00038"></a>00038       + ((user == user_) ?
<a name="l00039"></a>00039          <span class="stringliteral">&quot;chat-self&quot;</span> :
<a name="l00040"></a>00040          <span class="stringliteral">&quot;chat-user&quot;</span>)
<a name="l00041"></a>00041       + <span class="stringliteral">&quot;&#39;&gt;&quot;</span> + <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(user_) + <span class="stringliteral">&quot;:&lt;/span&gt;&quot;</span>;
<a name="l00042"></a>00042 
<a name="l00043"></a>00043     <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a> msg
<a name="l00044"></a>00044       = (format == <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/namespaceWt.html#a140dea437d52d3d7c438ea3bd16a1480a847ab5a73b906fea275bd16877b420a4">XHTMLText</a> ? message_ : <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WWebWidget.html#a6cd1b8a84c7aaf72e5d44cb47ae90e9c">WWebWidget::escapeText</a>(message_));
<a name="l00045"></a>00045 
<a name="l00046"></a>00046     <span class="keywordflow">if</span> (message_.toUTF8().find(user.<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html#a159d088da6e8f2be1035b2341889254c">toUTF8</a>()) != std::string::npos)
<a name="l00047"></a>00047       <span class="keywordflow">return</span> result + <span class="stringliteral">&quot;&lt;span class=&#39;chat-highlight&#39;&gt;&quot;</span> + msg + <span class="stringliteral">&quot;&lt;/span&gt;&quot;</span>;
<a name="l00048"></a>00048     <span class="keywordflow">else</span>
<a name="l00049"></a>00049       <span class="keywordflow">return</span> result + msg;
<a name="l00050"></a>00050   }
<a name="l00051"></a>00051   <span class="keywordflow">default</span>:
<a name="l00052"></a>00052     <span class="keywordflow">return</span> <span class="stringliteral">&quot;&quot;</span>;
<a name="l00053"></a>00053   }
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055 
<a name="l00056"></a>00056 
<a name="l00057"></a><a class="code" href="classSimpleChatServer.html#a2cf35cb3b79c6a3d3815df92b25b713e">00057</a> <a class="code" href="classSimpleChatServer.html#a2cf35cb3b79c6a3d3815df92b25b713e" title="Create a new chat server.">SimpleChatServer::SimpleChatServer</a>(<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WServer.html">WServer</a>&amp; server)
<a name="l00058"></a>00058   : server_(server)
<a name="l00059"></a>00059 { }
<a name="l00060"></a>00060 
<a name="l00061"></a><a class="code" href="classSimpleChatServer.html#a916cec08c2aeb2d2ccf413e9c9a45036">00061</a> <span class="keywordtype">bool</span> <a class="code" href="classSimpleChatServer.html#a916cec08c2aeb2d2ccf413e9c9a45036" title="Connects to the chat server.">SimpleChatServer::connect</a>(<a class="code" href="classSimpleChatServer_1_1Client.html">Client</a> *client,
<a name="l00062"></a>00062                                <span class="keyword">const</span> <a class="code" href="group__chatexample.html#ga0b33bac2811bf39b0ea9412e91c3d4e7">ChatEventCallback</a>&amp; handleEvent)
<a name="l00063"></a>00063 {
<a name="l00064"></a>00064   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00065"></a>00065 
<a name="l00066"></a>00066   <span class="keywordflow">if</span> (<a class="code" href="classSimpleChatServer.html#ae04169217cc74765f5d08fff55e8ee26">clients_</a>.count(client) == 0) {
<a name="l00067"></a>00067     <a class="code" href="structSimpleChatServer_1_1ClientInfo.html">ClientInfo</a> clientInfo;
<a name="l00068"></a>00068   
<a name="l00069"></a>00069     clientInfo.<a class="code" href="structSimpleChatServer_1_1ClientInfo.html#a0bf0cce3b1da1a9de0a5073b3002f167">sessionId</a> = WApplication::instance()-&gt;sessionId();
<a name="l00070"></a>00070     clientInfo.<a class="code" href="structSimpleChatServer_1_1ClientInfo.html#ae410d9888b231e77ad48361e2da519b6">eventCallback</a> = handleEvent;
<a name="l00071"></a>00071 
<a name="l00072"></a>00072     <a class="code" href="classSimpleChatServer.html#ae04169217cc74765f5d08fff55e8ee26">clients_</a>[client] = clientInfo;
<a name="l00073"></a>00073 
<a name="l00074"></a>00074     <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00075"></a>00075   } <span class="keywordflow">else</span>
<a name="l00076"></a>00076     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00077"></a>00077 }
<a name="l00078"></a>00078 
<a name="l00079"></a><a class="code" href="classSimpleChatServer.html#a070e07e1a2a5ec5ecc4e944a761256c9">00079</a> <span class="keywordtype">bool</span> <a class="code" href="classSimpleChatServer.html#a070e07e1a2a5ec5ecc4e944a761256c9" title="Disconnect from the chat server.">SimpleChatServer::disconnect</a>(<a class="code" href="classSimpleChatServer_1_1Client.html">Client</a> *client)
<a name="l00080"></a>00080 {
<a name="l00081"></a>00081   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00082"></a>00082 
<a name="l00083"></a>00083   <span class="keywordflow">return</span> <a class="code" href="classSimpleChatServer.html#ae04169217cc74765f5d08fff55e8ee26">clients_</a>.erase(client) == 1;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085 
<a name="l00086"></a><a class="code" href="classSimpleChatServer.html#ada0ab17464e1711ca15f30b381ede57c">00086</a> <span class="keywordtype">bool</span> <a class="code" href="classSimpleChatServer.html#ada0ab17464e1711ca15f30b381ede57c" title="Try to login with given user name.">SimpleChatServer::login</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; user)
<a name="l00087"></a>00087 {
<a name="l00088"></a>00088   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00089"></a>00089   
<a name="l00090"></a>00090   <span class="keywordflow">if</span> (<a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.find(user) == <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.end()) {
<a name="l00091"></a>00091     <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.insert(user);
<a name="l00092"></a>00092 
<a name="l00093"></a>00093     <a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">postChatEvent</a>(<a class="code" href="classChatEvent.html" title="Encapsulate a chat event.">ChatEvent</a>(<a class="code" href="classChatEvent.html#afa84446dae17c08fe15cf932fc0b7d61a5173cb4baa818f95af4604d7a01e3ae6">ChatEvent::Login</a>, user));
<a name="l00094"></a>00094 
<a name="l00095"></a>00095     <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00096"></a>00096   } <span class="keywordflow">else</span>
<a name="l00097"></a>00097     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00098"></a>00098 }
<a name="l00099"></a>00099 
<a name="l00100"></a><a class="code" href="classSimpleChatServer.html#a5d376e3ff441f24843be648dd420e027">00100</a> <span class="keywordtype">void</span> <a class="code" href="classSimpleChatServer.html#a5d376e3ff441f24843be648dd420e027" title="Logout from the server.">SimpleChatServer::logout</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; user)
<a name="l00101"></a>00101 {
<a name="l00102"></a>00102   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00103"></a>00103 
<a name="l00104"></a>00104   UserSet::iterator i = <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.find(user);
<a name="l00105"></a>00105 
<a name="l00106"></a>00106   <span class="keywordflow">if</span> (i != <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.end()) {
<a name="l00107"></a>00107     <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.erase(i);
<a name="l00108"></a>00108 
<a name="l00109"></a>00109     <a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">postChatEvent</a>(<a class="code" href="classChatEvent.html" title="Encapsulate a chat event.">ChatEvent</a>(<a class="code" href="classChatEvent.html#afa84446dae17c08fe15cf932fc0b7d61aa8b11c1512738c200b2cfe1facd1c171">ChatEvent::Logout</a>, user));
<a name="l00110"></a>00110   }
<a name="l00111"></a>00111 }
<a name="l00112"></a>00112 
<a name="l00113"></a><a class="code" href="classSimpleChatServer.html#a0154462f2176611e8c44d93efe306283">00113</a> <span class="keywordtype">bool</span> <a class="code" href="classSimpleChatServer.html#a0154462f2176611e8c44d93efe306283" title="Changes the name.">SimpleChatServer::changeName</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; user, <span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; newUser)
<a name="l00114"></a>00114 {
<a name="l00115"></a>00115   <span class="keywordflow">if</span> (user == newUser)
<a name="l00116"></a>00116     <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00117"></a>00117 
<a name="l00118"></a>00118   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00119"></a>00119   
<a name="l00120"></a>00120   UserSet::iterator i = <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.find(user);
<a name="l00121"></a>00121 
<a name="l00122"></a>00122   <span class="keywordflow">if</span> (i != <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.end()) {
<a name="l00123"></a>00123     <span class="keywordflow">if</span> (<a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.count(newUser) == 0) {
<a name="l00124"></a>00124       <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.erase(i);
<a name="l00125"></a>00125       <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.insert(newUser);
<a name="l00126"></a>00126 
<a name="l00127"></a>00127       <a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">postChatEvent</a>(<a class="code" href="classChatEvent.html" title="Encapsulate a chat event.">ChatEvent</a>(<a class="code" href="classChatEvent.html#afa84446dae17c08fe15cf932fc0b7d61ab168d89affa0c72ba9a37d2881479ed8">ChatEvent::Rename</a>, user, newUser));
<a name="l00128"></a>00128 
<a name="l00129"></a>00129       <span class="keywordflow">return</span> <span class="keyword">true</span>;
<a name="l00130"></a>00130     } <span class="keywordflow">else</span>
<a name="l00131"></a>00131       <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00132"></a>00132   } <span class="keywordflow">else</span>
<a name="l00133"></a>00133     <span class="keywordflow">return</span> <span class="keyword">false</span>;
<a name="l00134"></a>00134 }
<a name="l00135"></a>00135 
<a name="l00136"></a><a class="code" href="classSimpleChatServer.html#abf692567706118193111c2b2589c8d3f">00136</a> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a> <a class="code" href="classSimpleChatServer.html#abf692567706118193111c2b2589c8d3f" title="Get a suggestion for a guest user name.">SimpleChatServer::suggestGuest</a>()
<a name="l00137"></a>00137 {
<a name="l00138"></a>00138   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00139"></a>00139 
<a name="l00140"></a>00140   <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 1;; ++i) {
<a name="l00141"></a>00141     std::string s = <span class="stringliteral">&quot;guest &quot;</span> + boost::lexical_cast&lt;std::string&gt;(i);
<a name="l00142"></a>00142     <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a> ss = s;
<a name="l00143"></a>00143 
<a name="l00144"></a>00144     <span class="keywordflow">if</span> (<a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.find(ss) == <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>.end())
<a name="l00145"></a>00145       <span class="keywordflow">return</span> ss;
<a name="l00146"></a>00146   }
<a name="l00147"></a>00147 }
<a name="l00148"></a>00148 
<a name="l00149"></a><a class="code" href="classSimpleChatServer.html#aab42074f7904397b3547a6df89c16d9d">00149</a> <span class="keywordtype">void</span> <a class="code" href="classSimpleChatServer.html#aab42074f7904397b3547a6df89c16d9d" title="Send a message on behalve of a user.">SimpleChatServer::sendMessage</a>(<span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; user, <span class="keyword">const</span> <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WString.html">WString</a>&amp; message)
<a name="l00150"></a>00150 {
<a name="l00151"></a>00151   <a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">postChatEvent</a>(<a class="code" href="classChatEvent.html" title="Encapsulate a chat event.">ChatEvent</a>(user, message));
<a name="l00152"></a>00152 }
<a name="l00153"></a>00153 
<a name="l00154"></a><a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">00154</a> <span class="keywordtype">void</span> <a class="code" href="classSimpleChatServer.html#a5038714fb4463072bd795fea419e6f09">SimpleChatServer::postChatEvent</a>(<span class="keyword">const</span> <a class="code" href="classChatEvent.html" title="Encapsulate a chat event.">ChatEvent</a>&amp; event)
<a name="l00155"></a>00155 {
<a name="l00156"></a>00156   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00157"></a>00157 
<a name="l00158"></a>00158   <a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html">WApplication</a> *app = WApplication::instance();
<a name="l00159"></a>00159 
<a name="l00160"></a>00160   <span class="keywordflow">for</span> (ClientMap::const_iterator i = <a class="code" href="classSimpleChatServer.html#ae04169217cc74765f5d08fff55e8ee26">clients_</a>.begin(); i != <a class="code" href="classSimpleChatServer.html#ae04169217cc74765f5d08fff55e8ee26">clients_</a>.end();
<a name="l00161"></a>00161        ++i) {
<a name="l00162"></a>00162     <span class="comment">/*</span>
<a name="l00163"></a>00163 <span class="comment">     * If the user corresponds to the current application, we directly</span>
<a name="l00164"></a>00164 <span class="comment">     * call the call back method. This avoids an unnecessary delay for</span>
<a name="l00165"></a>00165 <span class="comment">     * the update to the user causing the event.</span>
<a name="l00166"></a>00166 <span class="comment">     *</span>
<a name="l00167"></a>00167 <span class="comment">     * For other uses, we post it to their session. By posting the</span>
<a name="l00168"></a>00168 <span class="comment">     * event, we avoid dead-lock scenarios, race conditions, and</span>
<a name="l00169"></a>00169 <span class="comment">     * delivering the event to a session that is just about to be</span>
<a name="l00170"></a>00170 <span class="comment">     * terminated.</span>
<a name="l00171"></a>00171 <span class="comment">     */</span>
<a name="l00172"></a>00172     <span class="keywordflow">if</span> (app &amp;&amp; app-&gt;<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WApplication.html#ab55c625a3197fec416544be8ad1529af">sessionId</a>() == i-&gt;second.sessionId)
<a name="l00173"></a>00173       i-&gt;second.eventCallback(event);
<a name="l00174"></a>00174     <span class="keywordflow">else</span>
<a name="l00175"></a>00175       <a class="code" href="classSimpleChatServer.html#ab63a496e6fdfebbb2ca3ab9dfaace70b">server_</a>.<a class="codeRef" doxygen="wt.tags:../../reference/html" href="../../reference/html/classWt_1_1WServer.html#a6115cc9ad6ec28e55fb85e32a045df88">post</a>(i-&gt;second.sessionId,
<a name="l00176"></a>00176                    boost::bind(i-&gt;second.eventCallback, event));
<a name="l00177"></a>00177   }
<a name="l00178"></a>00178 }
<a name="l00179"></a>00179 
<a name="l00180"></a><a class="code" href="classSimpleChatServer.html#a40f5c6465b1edb44278be93c97a29a39">00180</a> <a class="code" href="classSimpleChatServer.html#a911329f24472ca7ed245ab18611488d4" title="Typedef for a collection of user names.">SimpleChatServer::UserSet</a> <a class="code" href="classSimpleChatServer.html#a40f5c6465b1edb44278be93c97a29a39" title="Get the users currently logged in.">SimpleChatServer::users</a>()
<a name="l00181"></a>00181 {
<a name="l00182"></a>00182   boost::recursive_mutex::scoped_lock lock(<a class="code" href="classSimpleChatServer.html#a91a994a5f6fb9879646dfd29f0b47556">mutex_</a>);
<a name="l00183"></a>00183 
<a name="l00184"></a>00184   <a class="code" href="classSimpleChatServer.html#a911329f24472ca7ed245ab18611488d4" title="Typedef for a collection of user names.">UserSet</a> result = <a class="code" href="classSimpleChatServer.html#ae6712308cbb1f6b1ff4024630ea1d20c">users_</a>;
<a name="l00185"></a>00185 
<a name="l00186"></a>00186   <span class="keywordflow">return</span> result;
<a name="l00187"></a>00187 }
<a name="l00188"></a>00188 
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