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<div class="navpath"><a class="el" href="dir_cfc6129efafb4deb1379318d01a4b532.html">modules</a> » <a class="el" href="dir_1fb731018ee43e669063132ba9c17b7b.html">webservice</a>
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<h1>server.cpp</h1><a href="a00236.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"> file : $URL: https://frepple.svn.sourceforge.net/svnroot/frepple/trunk/modules/webservice/server.cpp $</span>
<a name="l00003"></a>00003 <span class="comment"> version : $LastChangedRevision: 1315 $ $LastChangedBy: jdetaeye $</span>
<a name="l00004"></a>00004 <span class="comment"> date : $LastChangedDate: 2010-07-17 18:08:53 +0200 (Sat, 17 Jul 2010) $</span>
<a name="l00005"></a>00005 <span class="comment"> ***************************************************************************/</span>
<a name="l00006"></a>00006
<a name="l00007"></a>00007 <span class="comment">/***************************************************************************</span>
<a name="l00008"></a>00008 <span class="comment"> * *</span>
<a name="l00009"></a>00009 <span class="comment"> * Copyright (C) 2007-2010 by Johan De Taeye *</span>
<a name="l00010"></a>00010 <span class="comment"> * *</span>
<a name="l00011"></a>00011 <span class="comment"> * This library is free software; you can redistribute it and/or modify it *</span>
<a name="l00012"></a>00012 <span class="comment"> * under the terms of the GNU Lesser General Public License as published *</span>
<a name="l00013"></a>00013 <span class="comment"> * by the Free Software Foundation; either version 2.1 of the License, or *</span>
<a name="l00014"></a>00014 <span class="comment"> * (at your option) any later version. *</span>
<a name="l00015"></a>00015 <span class="comment"> * *</span>
<a name="l00016"></a>00016 <span class="comment"> * This library is distributed in the hope that it will be useful, *</span>
<a name="l00017"></a>00017 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of *</span>
<a name="l00018"></a>00018 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser *</span>
<a name="l00019"></a>00019 <span class="comment"> * General Public License for more details. *</span>
<a name="l00020"></a>00020 <span class="comment"> * *</span>
<a name="l00021"></a>00021 <span class="comment"> * You should have received a copy of the GNU Lesser General Public *</span>
<a name="l00022"></a>00022 <span class="comment"> * License along with this library; if not, write to the Free Software *</span>
<a name="l00023"></a>00023 <span class="comment"> * Foundation Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,*</span>
<a name="l00024"></a>00024 <span class="comment"> * USA *</span>
<a name="l00025"></a>00025 <span class="comment"> * *</span>
<a name="l00026"></a>00026 <span class="comment"> ***************************************************************************/</span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="comment">/* The code in this file is copied from the gsoap manual, with only relatively</span>
<a name="l00029"></a>00029 <span class="comment"> * small changes.</span>
<a name="l00030"></a>00030 <span class="comment"> */</span>
<a name="l00031"></a>00031
<a name="l00032"></a>00032 <span class="preprocessor">#include "<a class="code" href="a00221.html" title="Header file for the module webservice.">module.h</a>"</span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <pthread.h></span>
<a name="l00034"></a>00034
<a name="l00035"></a>00035 <span class="keyword">namespace </span>module_webservice
<a name="l00036"></a>00036 {
<a name="l00037"></a>00037
<a name="l00038"></a>00038
<a name="l00039"></a><a class="code" href="a00038.html#a830ac29dd87f66c8390661c6115f7e43">00039</a> PyObject* <a class="code" href="a00038.html#a830ac29dd87f66c8390661c6115f7e43">CommandWebservice::pythonService</a>(PyObject* <span class="keyword">self</span>, PyObject* args)
<a name="l00040"></a>00040 {
<a name="l00041"></a>00041 Py_BEGIN_ALLOW_THREADS <span class="comment">// Free Python interpreter for other threads</span>
<a name="l00042"></a>00042 <span class="keywordflow">try</span> {
<a name="l00043"></a>00043 <a class="code" href="a00038.html#ace4533ee13439a66366811dd8e7f8052">CommandWebservice</a>().execute();
<a name="l00044"></a>00044 }
<a name="l00045"></a>00045 <span class="keywordflow">catch</span> (...)
<a name="l00046"></a>00046 {
<a name="l00047"></a>00047 Py_BLOCK_THREADS;
<a name="l00048"></a>00048 PythonType::evalException();
<a name="l00049"></a>00049 <span class="keywordflow">return</span> NULL;
<a name="l00050"></a>00050 }
<a name="l00051"></a>00051 Py_END_ALLOW_THREADS <span class="comment">// Reclaim Python interpreter</span>
<a name="l00052"></a>00052 <span class="keywordflow">return</span> Py_BuildValue(<span class="stringliteral">""</span>);
<a name="l00053"></a>00053 }
<a name="l00054"></a>00054
<a name="l00055"></a>00055
<a name="l00056"></a><a class="code" href="a00038.html#a464de63f22b18d0b19a49af0ebe5b28c">00056</a> <span class="keywordtype">void</span> <a class="code" href="a00038.html#a464de63f22b18d0b19a49af0ebe5b28c">CommandWebservice::execute</a>()
<a name="l00057"></a>00057 {
<a name="l00058"></a>00058 <span class="comment">// Initialize</span>
<a name="l00059"></a>00059 thread_data threadinfo[threads];
<a name="l00060"></a>00060 <span class="keyword">struct </span>soap soap;
<a name="l00061"></a>00061 soap_init(&soap);
<a name="l00062"></a>00062 SOAP_SOCKET mastersocket, slavesocket;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// Bind to a port on the local machine.</span>
<a name="l00065"></a>00065 mastersocket = soap_bind(&soap, NULL, port, <a class="code" href="a00221.html#aeefbbafa97642defe3ee6c3080b7d66f">BACKLOG</a>);
<a name="l00066"></a>00066 <span class="keywordflow">if</span> (!soap_valid_socket(mastersocket))
<a name="l00067"></a>00067 <span class="keywordflow">throw</span> <a class="code" href="a00162.html" title="An exception of this type is thrown when the library runs into problems that are...">RuntimeException</a>(<span class="stringliteral">"Can't bind to port "</span> + port);
<a name="l00068"></a>00068
<a name="l00069"></a>00069 <span class="comment">// Creating execution threads in the pool</span>
<a name="l00070"></a>00070 pthread_mutex_init(&queue_cs, NULL);
<a name="l00071"></a>00071 pthread_cond_init(&queue_cv, NULL);
<a name="l00072"></a>00072 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < threads; i++)
<a name="l00073"></a>00073 {
<a name="l00074"></a>00074 threadinfo[i].master = <span class="keyword">this</span>;
<a name="l00075"></a>00075 threadinfo[i].index = i;
<a name="l00076"></a>00076 threadinfo[i].soap_thr = soap_copy(&soap);
<a name="l00077"></a>00077 pthread_create(&threadinfo[i].tid, NULL, (<span class="keywordtype">void</span>*(*)(<span class="keywordtype">void</span>*))process_queue, static_cast<void*>(&threadinfo[i]));
<a name="l00078"></a>00078 }
<a name="l00079"></a>00079
<a name="l00080"></a>00080 <span class="comment">// Loop forever</span>
<a name="l00081"></a>00081 <span class="keywordflow">for</span> (;;)
<a name="l00082"></a>00082 {
<a name="l00083"></a>00083 <span class="comment">// Wait for incoming connection on the port</span>
<a name="l00084"></a>00084 slavesocket = soap_accept(&soap);
<a name="l00085"></a>00085 <span class="keywordflow">if</span> (!soap_valid_socket(slavesocket))
<a name="l00086"></a>00086 {
<a name="l00087"></a>00087 <span class="keywordflow">if</span> (soap.errnum)
<a name="l00088"></a>00088 {
<a name="l00089"></a>00089 soap_print_fault(&soap, stderr);
<a name="l00090"></a>00090 <span class="keywordflow">continue</span>; <span class="comment">// retry</span>
<a name="l00091"></a>00091 }
<a name="l00092"></a>00092 <span class="keywordflow">else</span>
<a name="l00093"></a>00093 {
<a name="l00094"></a>00094 <a class="code" href="a00257.html#a4af9f241e955122820c5e81ceb33edb5">logger</a> << <span class="stringliteral">"Server timed out"</span> << endl;
<a name="l00095"></a>00095 <span class="keywordflow">break</span>;
<a name="l00096"></a>00096 }
<a name="l00097"></a>00097 }
<a name="l00098"></a>00098 <a class="code" href="a00257.html#a4af9f241e955122820c5e81ceb33edb5">logger</a> << <span class="stringliteral">"Connection from "</span> << ((soap.ip >> 24)&0xFF) << <span class="stringliteral">"."</span>
<a name="l00099"></a>00099 << ((soap.ip >> 16)&0xFF) << <span class="stringliteral">"."</span> << ((soap.ip >> 8)&0xFF) << <span class="stringliteral">"."</span>
<a name="l00100"></a>00100 << (soap.ip&0xFF) << endl;
<a name="l00101"></a>00101
<a name="l00102"></a>00102 <span class="comment">// Loop until the request could be entered in the request queue</span>
<a name="l00103"></a>00103 <span class="keywordflow">while</span> (enqueue(slavesocket) == SOAP_EOM)
<a name="l00104"></a>00104 sleep(1);
<a name="l00105"></a>00105 }
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// Send termination signal to all threads</span>
<a name="l00108"></a>00108 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < threads; i++)
<a name="l00109"></a>00109 {
<a name="l00110"></a>00110 <span class="comment">// Put termination requests in the queue</span>
<a name="l00111"></a>00111 <span class="keywordflow">while</span> (enqueue(SOAP_INVALID_SOCKET) == SOAP_EOM)
<a name="l00112"></a>00112 sleep(1);
<a name="l00113"></a>00113 }
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="comment">// Wait for the threads to terminate</span>
<a name="l00116"></a>00116 <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < threads; i++)
<a name="l00117"></a>00117 {
<a name="l00118"></a>00118 pthread_join(threadinfo[i].tid, NULL);
<a name="l00119"></a>00119 soap_done(threadinfo[i].soap_thr);
<a name="l00120"></a>00120 free(threadinfo[i].soap_thr);
<a name="l00121"></a>00121 }
<a name="l00122"></a>00122
<a name="l00123"></a>00123 <span class="comment">// Cleaning up</span>
<a name="l00124"></a>00124 pthread_mutex_destroy(&queue_cs);
<a name="l00125"></a>00125 pthread_cond_destroy(&queue_cv);
<a name="l00126"></a>00126 soap_done(&soap);
<a name="l00127"></a>00127 }
<a name="l00128"></a>00128
<a name="l00129"></a>00129
<a name="l00130"></a>00130 <span class="keywordtype">void</span>* CommandWebservice::process_queue(<span class="keywordtype">void</span> *soap)
<a name="l00131"></a>00131 {
<a name="l00132"></a>00132 <span class="keyword">struct </span>thread_data *mydata = (<span class="keyword">struct </span>thread_data*)soap;
<a name="l00133"></a>00133 <span class="comment">// Loop forever</span>
<a name="l00134"></a>00134 <span class="keywordflow">for</span> (;;)
<a name="l00135"></a>00135 {
<a name="l00136"></a>00136 <span class="comment">// Pick a request from my master's queue</span>
<a name="l00137"></a>00137 mydata->soap_thr->socket = mydata->master->dequeue();
<a name="l00138"></a>00138
<a name="l00139"></a>00139 <span class="comment">// Break out of the loop if an invalid socket is put in the queue</span>
<a name="l00140"></a>00140 <span class="keywordflow">if</span> (!soap_valid_socket(mydata->soap_thr->socket)) <span class="keywordflow">break</span>;
<a name="l00141"></a>00141
<a name="l00142"></a>00142 <span class="comment">// Process the request</span>
<a name="l00143"></a>00143 soap_serve(mydata->soap_thr);
<a name="l00144"></a>00144 soap_destroy(mydata->soap_thr);
<a name="l00145"></a>00145 soap_end(mydata->soap_thr);
<a name="l00146"></a>00146 }
<a name="l00147"></a>00147 <span class="keywordflow">return</span> NULL;
<a name="l00148"></a>00148 }
<a name="l00149"></a>00149
<a name="l00150"></a>00150
<a name="l00151"></a>00151 <span class="keywordtype">int</span> CommandWebservice::enqueue(SOAP_SOCKET sock)
<a name="l00152"></a>00152 {
<a name="l00153"></a>00153 <span class="keywordtype">int</span> status = SOAP_OK;
<a name="l00154"></a>00154 <span class="keywordtype">int</span> next;
<a name="l00155"></a>00155 pthread_mutex_lock(&queue_cs);
<a name="l00156"></a>00156 next = tail + 1;
<a name="l00157"></a>00157 <span class="keywordflow">if</span> (next >= <a class="code" href="a00221.html#ab94814559b67e4a2a564087f821145ea">MAX_QUEUE</a>)
<a name="l00158"></a>00158 next = 0;
<a name="l00159"></a>00159 <span class="keywordflow">if</span> (next == head)
<a name="l00160"></a>00160 status = SOAP_EOM;
<a name="l00161"></a>00161 <span class="keywordflow">else</span>
<a name="l00162"></a>00162 {
<a name="l00163"></a>00163 queue[tail] = sock;
<a name="l00164"></a>00164 tail = next;
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166 pthread_cond_signal(&queue_cv);
<a name="l00167"></a>00167 pthread_mutex_unlock(&queue_cs);
<a name="l00168"></a>00168 <span class="keywordflow">return</span> status;
<a name="l00169"></a>00169 }
<a name="l00170"></a>00170
<a name="l00171"></a>00171
<a name="l00172"></a>00172 SOAP_SOCKET CommandWebservice::dequeue()
<a name="l00173"></a>00173 {
<a name="l00174"></a>00174 SOAP_SOCKET sock;
<a name="l00175"></a>00175 pthread_mutex_lock(&queue_cs);
<a name="l00176"></a>00176 <span class="keywordflow">while</span> (head == tail) pthread_cond_wait(&queue_cv, &queue_cs);
<a name="l00177"></a>00177 sock = queue[head++];
<a name="l00178"></a>00178 <span class="keywordflow">if</span> (head >= <a class="code" href="a00221.html#ab94814559b67e4a2a564087f821145ea">MAX_QUEUE</a>)
<a name="l00179"></a>00179 head = 0;
<a name="l00180"></a>00180 pthread_mutex_unlock(&queue_cs);
<a name="l00181"></a>00181 <span class="keywordflow">return</span> sock;
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183
<a name="l00184"></a>00184 }
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