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<h1>channel.cc</h1><a href="a00082.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Package : omniEvents</span>
<a name="l00002"></a>00002 <span class="comment">// channel.cc Created : 2005/04/23</span>
<a name="l00003"></a>00003 <span class="comment">// Author : Alex Tingle</span>
<a name="l00004"></a>00004 <span class="comment">//</span>
<a name="l00005"></a>00005 <span class="comment">// Copyright (C) 2005 Alex Tingle</span>
<a name="l00006"></a>00006 <span class="comment">//</span>
<a name="l00007"></a>00007 <span class="comment">// This file is part of the omniEvents application.</span>
<a name="l00008"></a>00008 <span class="comment">//</span>
<a name="l00009"></a>00009 <span class="comment">// omniEvents is free software; you can redistribute it and/or</span>
<a name="l00010"></a>00010 <span class="comment">// modify it under the terms of the GNU Lesser General Public</span>
<a name="l00011"></a>00011 <span class="comment">// License as published by the Free Software Foundation; either</span>
<a name="l00012"></a>00012 <span class="comment">// version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00013"></a>00013 <span class="comment">//</span>
<a name="l00014"></a>00014 <span class="comment">// omniEvents is distributed in the hope that it will be useful,</span>
<a name="l00015"></a>00015 <span class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00016"></a>00016 <span class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00017"></a>00017 <span class="comment">// Lesser General Public License for more details.</span>
<a name="l00018"></a>00018 <span class="comment">//</span>
<a name="l00019"></a>00019 <span class="comment">// You should have received a copy of the GNU Lesser General Public</span>
<a name="l00020"></a>00020 <span class="comment">// License along with this library; if not, write to the Free Software</span>
<a name="l00021"></a>00021 <span class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</span>
<a name="l00022"></a>00022 <span class="comment">//</span>
<a name="l00023"></a>00023 <span class="comment">// Description:</span>
<a name="l00024"></a>00024 <span class="comment">// Demonstates how to make a standalone EventChannel in your own</span>
<a name="l00025"></a>00025 <span class="comment">// application, using libomniEvents.</span>
<a name="l00026"></a>00026 <span class="comment">// </span>
<a name="l00027"></a>00027
<a name="l00028"></a>00028
<a name="l00029"></a>00029 <span class="preprocessor">#ifdef HAVE_CONFIG_H</span>
<a name="l00030"></a>00030 <span class="preprocessor"></span><span class="preprocessor"># include "<a class="code" href="a00083.html">config.h</a>"</span>
<a name="l00031"></a>00031 <span class="preprocessor">#endif</span>
<a name="l00032"></a>00032 <span class="preprocessor"></span>
<a name="l00033"></a>00033 <span class="preprocessor">#include <stdlib.h></span>
<a name="l00034"></a>00034 <span class="preprocessor">#include <signal.h></span>
<a name="l00035"></a>00035
<a name="l00036"></a>00036 <span class="preprocessor">#ifdef HAVE_IOSTREAM</span>
<a name="l00037"></a>00037 <span class="preprocessor"></span><span class="preprocessor"># include <iostream></span>
<a name="l00038"></a>00038 <span class="preprocessor">#else</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span><span class="preprocessor"># include <iostream.h></span>
<a name="l00040"></a>00040 <span class="preprocessor">#endif</span>
<a name="l00041"></a>00041 <span class="preprocessor"></span>
<a name="l00042"></a>00042 <span class="preprocessor">#ifdef HAVE_STD_IOSTREAM</span>
<a name="l00043"></a>00043 <span class="preprocessor"></span><span class="keyword">using</span> <span class="keyword">namespace </span>std;
<a name="l00044"></a>00044 <span class="preprocessor">#endif</span>
<a name="l00045"></a>00045 <span class="preprocessor"></span>
<a name="l00046"></a>00046 <span class="preprocessor">#include <omniEvents/EventChannel.h></span>
<a name="l00047"></a>00047
<a name="l00049"></a><a class="code" href="a00082.html#a0">00049</a> <span class="keywordtype">void</span> <a class="code" href="a00082.html#a0">myShutdown</a>(<span class="keywordtype">int</span> signum)
<a name="l00050"></a>00050 {
<a name="l00051"></a>00051 <a class="code" href="a00059.html#e0">OmniEvents::Orb::inst</a>().shutdown(signum);
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053
<a name="l00054"></a><a class="code" href="a00082.html#a1">00054</a> <span class="keywordtype">int</span> <a class="code" href="a00106.html#a0">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)
<a name="l00055"></a>00055 {
<a name="l00056"></a>00056 <span class="comment">//</span>
<a name="l00057"></a>00057 <span class="comment">// Start orb.</span>
<a name="l00058"></a>00058 CORBA::ORB_var <a class="code" href="a00097.html#a0">orb</a> = CORBA::ORB_init(argc,argv);
<a name="l00059"></a>00059
<a name="l00060"></a>00060 <span class="keyword">const</span> <span class="keywordtype">char</span>* action=<span class="stringliteral">""</span>; <span class="comment">// Use this variable to help report errors.</span>
<a name="l00061"></a>00061 <span class="keywordflow">try</span> {
<a name="l00062"></a>00062
<a name="l00063"></a>00063 action=<span class="stringliteral">"initialise OmniEvents::Orb"</span>;
<a name="l00064"></a>00064 <span class="comment">// Your code MUST include these two lines.</span>
<a name="l00065"></a>00065 <a class="code" href="a00059.html#e0">OmniEvents::Orb::inst</a>()._orb=orb;
<a name="l00066"></a>00066 <a class="code" href="a00059.html#e0">OmniEvents::Orb::inst</a>().resolveInitialReferences();
<a name="l00067"></a>00067
<a name="l00068"></a>00068 action=<span class="stringliteral">"activate the RootPOA's POAManager"</span>;
<a name="l00069"></a>00069 <span class="comment">// You MUST activate the RootPOA's POAManager. You can do this yourself</span>
<a name="l00070"></a>00070 <span class="comment">// in the normal way, or you can use the reference that OmniEvents::Orb</span>
<a name="l00071"></a>00071 <span class="comment">// has resolved for you.</span>
<a name="l00072"></a>00072 PortableServer::POAManager_var pman;
<a name="l00073"></a>00073 pman=<a class="code" href="a00059.html#e0">OmniEvents::Orb::inst</a>()._RootPOA->the_POAManager();
<a name="l00074"></a>00074 pman->activate();
<a name="l00075"></a>00075
<a name="l00076"></a>00076 action=<span class="stringliteral">"create EventChannel servant"</span>;
<a name="l00077"></a>00077 <span class="comment">// The constructor just allocates memory.</span>
<a name="l00078"></a>00078 <a class="code" href="a00046.html">OmniEvents::EventChannel_i</a>* channelSrv =<span class="keyword">new</span> <a class="code" href="a00046.html">OmniEvents::EventChannel_i</a>();
<a name="l00079"></a>00079
<a name="l00080"></a>00080 action=<span class="stringliteral">"activate EventChannel servant"</span>;
<a name="l00081"></a>00081 <span class="comment">// activate() creates & activates the EventChannel's POA and CORBA objects.</span>
<a name="l00082"></a>00082 channelSrv-><a class="code" href="a00046.html#a6">activate</a>(<span class="stringliteral">"MyChannel"</span>);
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="comment">// From this point, clients may invoke EventChannel operations.</span>
<a name="l00085"></a>00085
<a name="l00086"></a>00086 action=<span class="stringliteral">"obtain an object reference to the EventChannel"</span>;
<a name="l00087"></a>00087 CosEventChannelAdmin::EventChannel_var channelRef =channelSrv->_this();
<a name="l00088"></a>00088
<a name="l00089"></a>00089 <span class="comment">// The user interface of this example is simple: The EventChannel's IOR</span>
<a name="l00090"></a>00090 <span class="comment">// is dumped to the standard output stream.</span>
<a name="l00091"></a>00091 action=<span class="stringliteral">"stringify the EventChannel reference"</span>;
<a name="l00092"></a>00092 CORBA::String_var sior =orb->object_to_string(channelRef.in());
<a name="l00093"></a>00093 cout<<sior.in()<<endl;
<a name="l00094"></a>00094
<a name="l00095"></a>00095 action=<span class="stringliteral">"set signal handlers"</span>;
<a name="l00096"></a>00096 ::signal(SIGINT ,<a class="code" href="a00082.html#a0"> ::myShutdown</a>);
<a name="l00097"></a>00097 ::signal(SIGTERM,<a class="code" href="a00082.html#a0"> ::myShutdown</a>);
<a name="l00098"></a>00098
<a name="l00099"></a>00099 action=<span class="stringliteral">"collect orphan requests"</span>;
<a name="l00100"></a>00100 <span class="comment">// You MUST call this method, it processes orphan (asynchronous) method</span>
<a name="l00101"></a>00101 <span class="comment">// calls made by the EventChannel.</span>
<a name="l00102"></a>00102 <span class="comment">// You can safely call it instead of CORBA::ORB::run(). If you do not</span>
<a name="l00103"></a>00103 <span class="comment">// want to park the main thread, then you must create a new thread for this</span>
<a name="l00104"></a>00104 <span class="comment">// method.</span>
<a name="l00105"></a>00105 <a class="code" href="a00059.html#e0">OmniEvents::Orb::inst</a>().run();
<a name="l00106"></a>00106
<a name="l00107"></a>00107 <span class="comment">// OmniEvents::Orb::shutdown() has been called by the myShutdown() signal</span>
<a name="l00108"></a>00108 <span class="comment">// handler. (The user pressed Ctrl-C or killed the process.)</span>
<a name="l00109"></a>00109
<a name="l00110"></a>00110 <span class="comment">// In order to make run() return, you MUST call OmniEvents::Orb::shutdown().</span>
<a name="l00111"></a>00111
<a name="l00112"></a>00112 action=<span class="stringliteral">"destroy orb"</span>;
<a name="l00113"></a>00113 orb->destroy();
<a name="l00114"></a>00114
<a name="l00115"></a>00115 }
<a name="l00116"></a>00116 <span class="keywordflow">catch</span>(CORBA::SystemException& ex) {
<a name="l00117"></a>00117 cerr<<<span class="stringliteral">"Failed to "</span><<action<<<span class="stringliteral">"."</span>;
<a name="l00118"></a>00118 <span class="preprocessor">#if defined(HAVE_OMNIORB4)</span>
<a name="l00119"></a>00119 <span class="preprocessor"></span> cerr<<<span class="stringliteral">" "</span><<ex._name();
<a name="l00120"></a>00120 <span class="keywordflow">if</span>(ex.NP_minorString())
<a name="l00121"></a>00121 cerr<<<span class="stringliteral">" ("</span><<ex.NP_minorString()<<<span class="stringliteral">")"</span>;
<a name="l00122"></a>00122 <span class="preprocessor">#endif</span>
<a name="l00123"></a>00123 <span class="preprocessor"></span> cerr<<endl;
<a name="l00124"></a>00124 ::exit(1);
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126 <span class="keywordflow">catch</span>(CORBA::Exception& ex) {
<a name="l00127"></a>00127 cerr<<<span class="stringliteral">"Failed to "</span><<action<<<span class="stringliteral">"."</span>
<a name="l00128"></a>00128 <span class="preprocessor">#if defined(HAVE_OMNIORB4)</span>
<a name="l00129"></a>00129 <span class="preprocessor"></span> <span class="stringliteral">" "</span><<ex._name()
<a name="l00130"></a>00130 <span class="preprocessor">#endif</span>
<a name="l00131"></a>00131 <span class="preprocessor"></span> <<endl;
<a name="l00132"></a>00132 ::exit(1);
<a name="l00133"></a>00133 }
<a name="l00134"></a>00134
<a name="l00135"></a>00135 <span class="keywordflow">return</span> 0;
<a name="l00136"></a>00136 }
</pre></div><hr size="1"><address style="align: right;"><small>Generated on Fri Aug 26 20:56:13 2005 for OmniEvents by
<a href="http://www.doxygen.org/index.html">
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