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<hr><h1>ProxyPullSupplier.cc</h1><a href="a00122.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// Package : omniEvents</font>
00002 <font class="comment">// ProxyPullSupplier.cc Created : 2003/12/04</font>
00003 <font class="comment">// Author : Alex Tingle</font>
00004 <font class="comment">//</font>
00005 <font class="comment">// Copyright (C) 2003 Alex Tingle.</font>
00006 <font class="comment">//</font>
00007 <font class="comment">// This file is part of the omniEvents application.</font>
00008 <font class="comment">//</font>
00009 <font class="comment">// omniEvents is free software; you can redistribute it and/or</font>
00010 <font class="comment">// modify it under the terms of the GNU Lesser General Public</font>
00011 <font class="comment">// License as published by the Free Software Foundation; either</font>
00012 <font class="comment">// version 2.1 of the License, or (at your option) any later version.</font>
00013 <font class="comment">//</font>
00014 <font class="comment">// omniEvents is distributed in the hope that it will be useful,</font>
00015 <font class="comment">// but WITHOUT ANY WARRANTY; without even the implied warranty of</font>
00016 <font class="comment">// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</font>
00017 <font class="comment">// Lesser General Public License for more details.</font>
00018 <font class="comment">//</font>
00019 <font class="comment">// You should have received a copy of the GNU Lesser General Public</font>
00020 <font class="comment">// License along with this library; if not, write to the Free Software</font>
00021 <font class="comment">// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA</font>
00022 <font class="comment">//</font>
00023
00024 <font class="preprocessor">#include "<a class="code" href="a00123.html">ProxyPullSupplier.h</a>"</font>
00025 <font class="preprocessor">#include "<a class="code" href="a00093.html">EventChannel.h</a>"</font>
00026 <font class="preprocessor">#include "<a class="code" href="a00115.html">Orb.h</a>"</font>
00027 <font class="preprocessor">#include "<a class="code" href="a00113.html">omniEventsLog.h</a>"</font>
00028 <font class="preprocessor">#include "<a class="code" href="a00117.html">PersistNode.h</a>"</font>
00029 <font class="preprocessor">#include <assert.h></font>
00030
00031 <font class="keyword">namespace </font>OmniEvents {
00032
00033 <font class="comment">//</font>
00034 <font class="comment">// ProxyPullSupplierManager</font>
00035 <font class="comment">//</font>
00036
<a name="l00037"></a><a class="code" href="a00066.html#a0">00037</a> PortableServer::Servant ProxyPullSupplierManager::incarnate(
00038 <font class="keyword">const</font> PortableServer::ObjectId& oid,
00039 PortableServer::POA_ptr poa
00040 )
00041 {
00042 <font class="comment">// Evict the oldest proxy servant, if we have reached the maximum number.</font>
00043 <font class="keywordflow">if</font>(<a class="code" href="a00062.html#n0">_servants</a>.size()>=<a class="code" href="a00066.html#o0">_channel</a>.<a class="code" href="a00046.html#a14">maxNumProxies</a>())
00044 {
00045 <a class="code" href="a00065.html">ProxyPullSupplier_i</a>* oldest =NULL;
00046 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> age =0;
00047 <font class="keywordflow">for</font>(set<Proxy*>::iterator i=<a class="code" href="a00062.html#n0">_servants</a>.begin(); i!=<a class="code" href="a00062.html#n0">_servants</a>.end(); ++i)
00048 <font class="keywordflow">if</font>(!oldest || dynamic_cast<ProxyPullSupplier_i*>(*i)-><a class="code" href="a00065.html#a8">timestamp</a>()<age)
00049 {
00050 oldest=dynamic_cast<ProxyPullSupplier_i*>(*i);
00051 age=oldest-><a class="code" href="a00065.html#a8">timestamp</a>();
00052 }
00053 <a class="code" href="a00115.html#a2">DB</a>(5,<font class="stringliteral">"Evicting oldest ProxyPullSupplier to make space for a new one"</font>)
00054 <font class="keywordflow">try</font>{ oldest-><a class="code" href="a00065.html#a1">disconnect_pull_supplier</a>(); }<font class="keywordflow">catch</font>(CORBA::OBJECT_NOT_EXIST&){}
00055 }
00056 <font class="comment">// Make a new servant.</font>
00057 <a class="code" href="a00065.html">ProxyPullSupplier_i</a>* result =<font class="keyword">new</font> <a class="code" href="a00065.html">ProxyPullSupplier_i</a>(<a class="code" href="a00062.html#n1">_managedPoa</a>,<a class="code" href="a00066.html#o1">_queue</a>);
00058 <a class="code" href="a00062.html#n0">_servants</a>.insert(result);
00059 <font class="keywordflow">return</font> result;
00060 }
00061
<a name="l00062"></a><a class="code" href="a00066.html#a1">00062</a> ProxyPullSupplierManager::ProxyPullSupplierManager(
00063 <font class="keyword">const</font> <a class="code" href="a00046.html">EventChannel_i</a>& channel,
00064 PortableServer::POA_ptr parentPoa,
00065 <a class="code" href="a00049.html">EventQueue</a>& q
00066 )
00067 : <a class="code" href="a00062.html">ProxyManager</a>(parentPoa,"ProxyPullSupplier"),
00068 _queue(q),
00069 _channel(channel)
00070 {
00071 <font class="comment">// pass</font>
00072 }
00073
<a name="l00074"></a><a class="code" href="a00066.html#a2">00074</a> ProxyPullSupplierManager::~ProxyPullSupplierManager()
00075 {
00076 <a class="code" href="a00115.html#a2">DB</a>(20,<font class="stringliteral">"~ProxyPullSupplierManager()"</font>)
00077 }
00078
00079 CosEventChannelAdmin::ProxyPullSupplier_ptr
<a name="l00080"></a><a class="code" href="a00066.html#a3">00080</a> ProxyPullSupplierManager::createObject()
00081 {
00082 <font class="keywordflow">return</font> createNarrowedReference<CosEventChannelAdmin::ProxyPullSupplier>(
00083 <a class="code" href="a00062.html#n1">_managedPoa</a>.in(),
00084 CosEventChannelAdmin::_tc_ProxyPullSupplier->id()
00085 );
00086 }
00087
<a name="l00088"></a><a class="code" href="a00066.html#a4">00088</a> <font class="keywordtype">void</font> ProxyPullSupplierManager::disconnect()
00089 {
00090 <font class="keywordflow">for</font>(set<Proxy*>::iterator i =<a class="code" href="a00062.html#n0">_servants</a>.begin(); i!=<a class="code" href="a00062.html#n0">_servants</a>.end(); ++i)
00091 {
00092 <a class="code" href="a00065.html">ProxyPullSupplier_i</a>* narrowed =dynamic_cast<ProxyPullSupplier_i*>(*i);
00093 narrowed-><a class="code" href="a00065.html#a1">disconnect_pull_supplier</a>();
00094 }
00095 }
00096
00097
00098 <font class="comment">//</font>
00099 <font class="comment">// ProxyPullSupplier_i</font>
00100 <font class="comment">//</font>
00101
00102 <font class="comment">// CORBA interface methods</font>
00103
<a name="l00104"></a><a class="code" href="a00065.html#a0">00104</a> <font class="keywordtype">void</font> ProxyPullSupplier_i::connect_pull_consumer(
00105 CosEventComm::PullConsumer_ptr pullConsumer
00106 )
00107 {
00108 <font class="keywordflow">if</font>(<a class="code" href="a00065.html#o1">_connected</a> || !CORBA::is_nil(<a class="code" href="a00065.html#o0">_target</a>) || !CORBA::is_nil(<a class="code" href="a00061.html#n0">_req</a>))
00109 <font class="keywordflow">throw</font> CosEventChannelAdmin::AlreadyConnected();
00110 <a class="code" href="a00065.html#c0">touch</a>();
00111 <a class="code" href="a00065.html#o1">_connected</a>=<font class="keyword">true</font>;
00112 <font class="keywordflow">if</font>(!CORBA::is_nil(pullConsumer))
00113 <a class="code" href="a00065.html#o0">_target</a>=CosEventComm::PullConsumer::_duplicate(pullConsumer);
00114
00115 <a class="code" href="a00065.html#a7">output</a>(<a class="code" href="a00080.html">WriteLock</a>().os);
00116 }
00117
<a name="l00118"></a><a class="code" href="a00065.html#a1">00118</a> <font class="keywordtype">void</font> ProxyPullSupplier_i::disconnect_pull_supplier()
00119 {
00120 <a class="code" href="a00115.html#a2">DB</a>(5,<font class="stringliteral">"ProxyPullSupplier_i::disconnect_pull_supplier()"</font>);
00121 <a class="code" href="a00065.html#c0">touch</a>();
00122 <a class="code" href="a00061.html#b2">eraseKey</a>(<font class="stringliteral">"ConsumerAdmin/ProxyPullSupplier"</font>);
00123 <a class="code" href="a00073.html#b2">deactivateObject</a>();
00124 <font class="keywordflow">if</font>(!<a class="code" href="a00065.html#o1">_connected</a>)
00125 {
00126 <font class="keywordflow">throw</font> CORBA::OBJECT_NOT_EXIST(
00127 <a class="code" href="a00115.html#a0">IFELSE_OMNIORB4</a>(omni::OBJECT_NOT_EXIST_NoMatch,0),
00128 CORBA::COMPLETED_NO
00129 );
00130 }
00131 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(!CORBA::is_nil(<a class="code" href="a00065.html#o0">_target</a>))
00132 {
00133 CORBA::Request_var req=<a class="code" href="a00065.html#o0">_target</a>->_request(<font class="stringliteral">"disconnect_pull_consumer"</font>);
00134 req->send_deferred();
00135 Orb::inst().deferredRequest(req._retn());
00136 }
00137 <a class="code" href="a00065.html#o0">_target</a>=CosEventComm::PullConsumer::_nil();
00138 }
00139
<a name="l00140"></a><a class="code" href="a00065.html#a2">00140</a> CORBA::Any* ProxyPullSupplier_i::pull()
00141 {
00142 <font class="keywordflow">if</font>(!<a class="code" href="a00065.html#o1">_connected</a>)
00143 <font class="keywordflow">throw</font> CosEventComm::Disconnected();
00144 <a class="code" href="a00065.html#c0">touch</a>();
00145 <font class="keywordflow">if</font>(<a class="code" href="a00050.html#a1">moreEvents</a>())
00146 <font class="keywordflow">return</font> <font class="keyword">new</font> CORBA::Any(*<a class="code" href="a00050.html#a2">nextEvent</a>());
00147 <font class="keywordflow">else</font>
00148 <font class="keywordflow">throw</font> CORBA::TRANSIENT(
00149 <a class="code" href="a00115.html#a0">IFELSE_OMNIORB4</a>(omni::TRANSIENT_CallTimedout,0),
00150 CORBA::COMPLETED_NO
00151 );
00152 }
00153
<a name="l00154"></a><a class="code" href="a00065.html#a3">00154</a> CORBA::Any* ProxyPullSupplier_i::try_pull(CORBA::Boolean& has_event)
00155 {
00156 <font class="keywordflow">if</font>(!<a class="code" href="a00065.html#o1">_connected</a>)
00157 <font class="keywordflow">throw</font> CosEventComm::Disconnected();
00158 <a class="code" href="a00065.html#c0">touch</a>();
00159 <font class="keywordflow">if</font>(<a class="code" href="a00050.html#a1">moreEvents</a>())
00160 {
00161 has_event=1;
00162 <font class="keywordflow">return</font> <font class="keyword">new</font> CORBA::Any(*<a class="code" href="a00050.html#a2">nextEvent</a>());
00163 }
00164 <font class="keywordflow">else</font>
00165 {
00166 has_event=0;
00167 <font class="keywordflow">return</font> <font class="keyword">new</font> CORBA::Any();
00168 }
00169 }
00170
00171 <font class="comment">//</font>
00172
<a name="l00173"></a><a class="code" href="a00065.html#a4">00173</a> ProxyPullSupplier_i::ProxyPullSupplier_i(
00174 PortableServer::POA_ptr poa,
00175 <a class="code" href="a00049.html">EventQueue</a>& q
00176 )
00177 : <a class="code" href="a00061.html">Proxy</a>(poa),
00178 <a class="code" href="a00049.html">EventQueue</a>::Reader(q),
00179 _target(CosEventComm::PullConsumer::_nil()),
00180 _connected(false),
00181 _timestamp(0)
00182 {
00183 <a class="code" href="a00065.html#c0">touch</a>();
00184 }
00185
<a name="l00186"></a><a class="code" href="a00065.html#a5">00186</a> ProxyPullSupplier_i::~ProxyPullSupplier_i()
00187 {
00188 <a class="code" href="a00115.html#a2">DB</a>(20,<font class="stringliteral">"~ProxyPullSupplier_i()"</font>)
00189 }
00190
<a name="l00191"></a><a class="code" href="a00065.html#a6">00191</a> <font class="keywordtype">void</font> ProxyPullSupplier_i::reincarnate(
00192 <font class="keyword">const</font> string& oid,
00193 <font class="keyword">const</font> <a class="code" href="a00060.html">PersistNode</a>& node
00194 )
00195 {
00196 CosEventComm::PullConsumer_var pullConsumer =
00197 string_to_<CosEventComm::PullConsumer>(node.<a class="code" href="a00060.html#a11">attrString</a>(<font class="stringliteral">"IOR"</font>).c_str());
00198 <font class="comment">// Do not activate until we know that we have read a valid target.</font>
00199 <a class="code" href="a00073.html#b1">activateObjectWithId</a>(oid.c_str());
00200 <a class="code" href="a00065.html#a0">connect_pull_consumer</a>(pullConsumer.in());
00201 }
00202
<a name="l00203"></a><a class="code" href="a00065.html#a7">00203</a> <font class="keywordtype">void</font> ProxyPullSupplier_i::output(ostream& os)
00204 {
00205 <a class="code" href="a00061.html#b3">basicOutput</a>(os,<font class="stringliteral">"ConsumerAdmin/ProxyPullSupplier"</font>,<a class="code" href="a00065.html#o0">_target</a>.in());
00206 }
00207
<a name="l00208"></a><a class="code" href="a00065.html#c0">00208</a> <font class="keyword">inline</font> <font class="keywordtype">void</font> ProxyPullSupplier_i::touch()
00209 {
00210 <font class="keywordtype">unsigned</font> <font class="keywordtype">long</font> nsec; <font class="comment">// dummy</font>
00211 omni_thread::get_time(&<a class="code" href="a00065.html#o2">_timestamp</a>,&nsec);
00212 }
00213
00214 }; <font class="comment">// end namespace OmniEvents</font>
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