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<hr><h1>ProxyPullConsumer.cc</h1><a href="a00120.html">Go to the documentation of this file.</a><div class="fragment"><pre>00001 <font class="comment">// Package : omniEvents</font>
00002 <font class="comment">// ProxyPullConsumer.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="a00121.html">ProxyPullConsumer.h</a>"</font>
00025 <font class="preprocessor">#include "<a class="code" href="a00115.html">Orb.h</a>"</font>
00026 <font class="preprocessor">#include "<a class="code" href="a00113.html">omniEventsLog.h</a>"</font>
00027 <font class="preprocessor">#include "<a class="code" href="a00117.html">PersistNode.h</a>"</font>
00028 <font class="preprocessor">#include <assert.h></font>
00029
00030 <font class="keyword">namespace </font>OmniEvents {
00031
00032 <font class="comment">//</font>
00033 <font class="comment">// ProxyPullConsumerManager</font>
00034 <font class="comment">//</font>
00035
00036 PortableServer::Servant
<a name="l00037"></a><a class="code" href="a00064.html#a0">00037</a> ProxyPullConsumerManager::incarnate(
00038 <font class="keyword">const</font> PortableServer::ObjectId& oid,
00039 PortableServer::POA_ptr poa
00040 )
00041 {
00042 <a class="code" href="a00115.html#a2">DB</a>(20,<font class="stringliteral">"ProxyPullConsumerManager::incarnate()"</font>)
00043 <a class="code" href="a00063.html">ProxyPullConsumer_i</a>* result =<font class="keyword">new</font> <a class="code" href="a00063.html">ProxyPullConsumer_i</a>(<a class="code" href="a00062.html#n1">_managedPoa</a>,<a class="code" href="a00064.html#o0">_queue</a>);
00044 <a class="code" href="a00062.html#n0">_servants</a>.insert(result);
00045 <font class="keywordflow">return</font> result;
00046 }
00047
<a name="l00048"></a><a class="code" href="a00064.html#a1">00048</a> ProxyPullConsumerManager::ProxyPullConsumerManager(
00049 PortableServer::POA_ptr parentPoa,
00050 list<CORBA::Any*>& q
00051 )
00052 : <a class="code" href="a00062.html">ProxyManager</a>(parentPoa,"ProxyPullConsumer"),
00053 _queue(q)
00054 {
00055 <font class="comment">// pass</font>
00056 }
00057
<a name="l00058"></a><a class="code" href="a00064.html#a2">00058</a> ProxyPullConsumerManager::~ProxyPullConsumerManager()
00059 {
00060 <a class="code" href="a00115.html#a2">DB</a>(20,<font class="stringliteral">"~ProxyPullConsumerManager()"</font>)
00061 }
00062
00063 CosEventChannelAdmin::ProxyPullConsumer_ptr
<a name="l00064"></a><a class="code" href="a00064.html#a3">00064</a> ProxyPullConsumerManager::createObject()
00065 {
00066 <font class="keywordflow">return</font> createNarrowedReference<CosEventChannelAdmin::ProxyPullConsumer>(
00067 <a class="code" href="a00062.html#n1">_managedPoa</a>.in(),
00068 CosEventChannelAdmin::_tc_ProxyPullConsumer->id()
00069 );
00070 }
00071
<a name="l00072"></a><a class="code" href="a00064.html#a4">00072</a> <font class="keywordtype">void</font> ProxyPullConsumerManager::trigger()
00073 {
00074 <font class="comment">// Trigger each servant in turn.</font>
00075 <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)
00076 {
00077 <a class="code" href="a00063.html">ProxyPullConsumer_i</a>* proxy=dynamic_cast<ProxyPullConsumer_i*>(*i);
00078 proxy-><a class="code" href="a00063.html#a4">trigger</a>();
00079 }
00080 }
00081
<a name="l00082"></a><a class="code" href="a00064.html#a5">00082</a> <font class="keywordtype">void</font> ProxyPullConsumerManager::disconnect()
00083 {
00084 <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)
00085 {
00086 <a class="code" href="a00061.html">Proxy</a>* p =*i; <font class="comment">// Sun's CC requires this temporary.</font>
00087 <a class="code" href="a00063.html">ProxyPullConsumer_i</a>* ppc =static_cast<ProxyPullConsumer_i*>(p);
00088 ppc-><a class="code" href="a00063.html#a1">disconnect_pull_consumer</a>();
00089 }
00090 }
00091
00092
00093 <font class="comment">//</font>
00094 <font class="comment">// ProxyPullConsumer_i</font>
00095 <font class="comment">//</font>
00096
00097 <font class="comment">// CORBA interface methods</font>
00098
<a name="l00099"></a><a class="code" href="a00063.html#a0">00099</a> <font class="keywordtype">void</font> ProxyPullConsumer_i::connect_pull_supplier(
00100 CosEventComm::PullSupplier_ptr pullSupplier
00101 )
00102 {
00103 <font class="keywordflow">if</font>(CORBA::is_nil(pullSupplier))
00104 <font class="keywordflow">throw</font> CORBA::BAD_PARAM();
00105 <font class="keywordflow">if</font>(!CORBA::is_nil(<a class="code" href="a00063.html#o0">_target</a>) || !CORBA::is_nil(<a class="code" href="a00061.html#n0">_req</a>))
00106 <font class="keywordflow">throw</font> CosEventChannelAdmin::AlreadyConnected();
00107 <a class="code" href="a00063.html#o0">_target</a>=CosEventComm::PullSupplier::_duplicate(pullSupplier);
00108
00109 <a class="code" href="a00063.html#a6">output</a>(<a class="code" href="a00080.html">WriteLock</a>().os);
00110 }
00111
<a name="l00112"></a><a class="code" href="a00063.html#a1">00112</a> <font class="keywordtype">void</font> ProxyPullConsumer_i::disconnect_pull_consumer()
00113 {
00114 <a class="code" href="a00115.html#a2">DB</a>(5,<font class="stringliteral">"ProxyPullConsumer_i::disconnect_pull_consumer()"</font>);
00115 <a class="code" href="a00061.html#b2">eraseKey</a>(<font class="stringliteral">"SupplierAdmin/ProxyPullConsumer"</font>);
00116 <a class="code" href="a00073.html#b2">deactivateObject</a>();
00117 <font class="keywordflow">if</font>(CORBA::is_nil(<a class="code" href="a00063.html#o0">_target</a>))
00118 {
00119 <font class="keywordflow">throw</font> CORBA::OBJECT_NOT_EXIST(
00120 <a class="code" href="a00115.html#a0">IFELSE_OMNIORB4</a>(omni::OBJECT_NOT_EXIST_NoMatch,0),
00121 CORBA::COMPLETED_NO
00122 );
00123 }
00124 <font class="keywordflow">else</font>
00125 {
00126 CORBA::Request_var req=<a class="code" href="a00063.html#o0">_target</a>->_request(<font class="stringliteral">"disconnect_pull_supplier"</font>);
00127 req->send_deferred();
00128 Orb::inst().deferredRequest(req._retn());
00129 <a class="code" href="a00063.html#o0">_target</a>=CosEventComm::PullSupplier::_nil();
00130 }
00131 }
00132
00133 <font class="comment">//</font>
00134
<a name="l00135"></a><a class="code" href="a00063.html#a2">00135</a> ProxyPullConsumer_i::ProxyPullConsumer_i(
00136 PortableServer::POA_ptr poa,
00137 list<CORBA::Any*>& q
00138 )
00139 : <a class="code" href="a00061.html">Proxy</a>(poa),
00140 _target(CosEventComm::PullSupplier::_nil()),
00141 _queue(q)
00142 {
00143 <a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u0">Pull</a>]=0;
00144 <a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u1">TryPull</a>]=0;
00145 }
00146
<a name="l00147"></a><a class="code" href="a00063.html#a3">00147</a> ProxyPullConsumer_i::~ProxyPullConsumer_i()
00148 {
00149 <a class="code" href="a00115.html#a2">DB</a>(20,<font class="stringliteral">"~ProxyPullConsumer_i()"</font>)
00150 }
00151
<a name="l00152"></a><a class="code" href="a00063.html#a4">00152</a> <font class="keywordtype">void</font> ProxyPullConsumer_i::trigger()
00153 {
00154 <font class="comment">// Prefer 'pull' method calls.</font>
00155 CORBA::String_var opname =<font class="stringliteral">"pull"</font>;
00156
00157 <font class="keywordflow">if</font>(!CORBA::is_nil(<a class="code" href="a00061.html#n0">_req</a>) && <a class="code" href="a00061.html#n0">_req</a>->poll_response())
00158 {
00159 opname=CORBA::string_dup(<a class="code" href="a00061.html#n0">_req</a>->operation());
00160
00161 CORBA::Environment_ptr env=<a class="code" href="a00061.html#n0">_req</a>->env(); <font class="comment">// No need to release environment.</font>
00162 <font class="keywordflow">if</font>(!CORBA::is_nil(env) && env->exception())
00163 {
00164 CORBA::Exception* ex =env->exception(); <font class="comment">// No need to free exception.</font>
00165 <a class="code" href="a00115.html#a2">DB</a>(10,<font class="stringliteral">"ProxyPullConsumer got exception"</font>
00166 <a class="code" href="a00115.html#a1">IF_OMNIORB4</a>(<<<font class="stringliteral">": "</font><<ex->_name())<<<font class="stringliteral">", op:"</font><<opname);
00167 <font class="keywordflow">if</font>(0==strcmp(<font class="stringliteral">"pull"</font>,opname))
00168 {
00169 ++(<a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u0">Pull</a>]);
00170 opname=<font class="stringliteral">"try_pull"</font>; <font class="comment">// Try something else next time.</font>
00171 }
00172 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(0==strcmp(<font class="stringliteral">"try_pull"</font>,opname))
00173 {
00174 ++(<a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u1">TryPull</a>]);
00175 opname=<font class="stringliteral">"pull"</font>; <font class="comment">// Try something else next time.</font>
00176 }
00177 <font class="keywordflow">else</font>
00178 <a class="code" href="a00115.html#a2">DB</a>(2,<font class="stringliteral">"Ignoring unrecognised response. operation:"</font><<opname);
00179 <font class="keywordflow">if</font>(<a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u0">Pull</a>]>=2 && <a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u1">TryPull</a>]>=2)
00180 {
00181 Orb::inst().reportObjectFailure(HERE,<a class="code" href="a00063.html#o0">_target</a>.in(),ex);
00182
00183 <font class="comment">// Try to notify the Supplier that the connection is closing.</font>
00184 CORBA::Request_var req=<a class="code" href="a00063.html#o0">_target</a>->_request(<font class="stringliteral">"disconnect_pull_supplier"</font>);
00185 req->send_deferred();
00186 Orb::inst().deferredRequest(req._retn());
00187
00188 <a class="code" href="a00063.html#o0">_target</a>=CosEventComm::PullSupplier::_nil(); <font class="comment">// disconnected</font>
00189 <a class="code" href="a00061.html#b2">eraseKey</a>(<font class="stringliteral">"SupplierAdmin/ProxyPullConsumer"</font>);
00190 <a class="code" href="a00073.html#b2">deactivateObject</a>();
00191 }
00192 }
00193 <font class="keywordflow">else</font>
00194 {
00195 <font class="comment">// Do we have an event?</font>
00196 <font class="keywordtype">bool</font> hasEvent=<font class="keyword">false</font>;
00197 <font class="keywordflow">if</font>(0==strcmp(<font class="stringliteral">"pull"</font>,opname))
00198 {
00199 <a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u0">Pull</a>]=0;
00200 hasEvent=<font class="keyword">true</font>;
00201 }
00202 <font class="keywordflow">else</font> <font class="keywordflow">if</font>(0==strcmp(<font class="stringliteral">"try_pull"</font>,opname))
00203 {
00204 <a class="code" href="a00063.html#o2">_exceptionCount</a>[<a class="code" href="a00063.html#u2u1">TryPull</a>]=0;
00205 CORBA::NVList_ptr args=<a class="code" href="a00061.html#n0">_req</a>->arguments(); <font class="comment">// No need to release args.</font>
00206 <font class="keywordflow">if</font>(args->count()==1)
00207 {
00208 CORBA::NamedValue_var hasEventArg=args->item(0);
00209 <font class="keywordflow">if</font>(0==strcmp(hasEventArg->name(),<font class="stringliteral">"has_event"</font>))
00210 {
00211 CORBA::Any* a =hasEventArg->value();
00212 CORBA::Boolean b;
00213 CORBA::Any::to_boolean tb(b); <font class="comment">//MS VC++6 is on drugs!</font>
00214 hasEvent=(((*a)>>=tb) && b);
00215 }
00216 }
00217 }
00218 <font class="comment">// Pick up an event, if we have one.</font>
00219 <font class="keywordflow">if</font>(hasEvent)
00220 {
00221 CORBA::Any* event =<font class="keyword">new</font> CORBA::Any();
00222 <a class="code" href="a00061.html#n0">_req</a>->return_value() >>= (*event);
00223 <a class="code" href="a00063.html#o1">_queue</a>.push_back(event);
00224 }
00225 }
00226 <a class="code" href="a00061.html#n0">_req</a>=CORBA::Request::_nil();
00227 }
00229 <font class="keywordflow">if</font>(CORBA::is_nil(<a class="code" href="a00061.html#n0">_req</a>) && !CORBA::is_nil(<a class="code" href="a00063.html#o0">_target</a>))
00230 {
00231 <a class="code" href="a00061.html#n0">_req</a>=<a class="code" href="a00063.html#o0">_target</a>->_request(opname);
00232 <a class="code" href="a00061.html#n0">_req</a>->set_return_type(CORBA::_tc_any);
00233 <font class="keywordflow">if</font>(0==strcmp(<font class="stringliteral">"try_pull"</font>,opname))
00234 <a class="code" href="a00061.html#n0">_req</a>->add_out_arg(<font class="stringliteral">"has_event"</font>)<<=CORBA::Any::from_boolean(1);
00235 <a class="code" href="a00061.html#n0">_req</a>->send_deferred();
00236 }
00237 }
00238
<a name="l00239"></a><a class="code" href="a00063.html#a5">00239</a> <font class="keywordtype">void</font> ProxyPullConsumer_i::reincarnate(
00240 <font class="keyword">const</font> string& oid,
00241 <font class="keyword">const</font> <a class="code" href="a00060.html">PersistNode</a>& node
00242 )
00243 {
00244 CosEventComm::PullSupplier_var pullSupplier =
00245 string_to_<CosEventComm::PullSupplier>(node.<a class="code" href="a00060.html#a11">attrString</a>(<font class="stringliteral">"IOR"</font>).c_str());
00246 <font class="comment">// Do not activate until we know that we have read a valid target.</font>
00247 <a class="code" href="a00073.html#b1">activateObjectWithId</a>(oid.c_str());
00248 <a class="code" href="a00063.html#a0">connect_pull_supplier</a>(pullSupplier.in());
00249 }
00250
<a name="l00251"></a><a class="code" href="a00063.html#a6">00251</a> <font class="keywordtype">void</font> ProxyPullConsumer_i::output(ostream& os)
00252 {
00253 <a class="code" href="a00061.html#b3">basicOutput</a>(os,<font class="stringliteral">"SupplierAdmin/ProxyPullConsumer"</font>,<a class="code" href="a00063.html#o0">_target</a>.in());
00254 }
00255
00256 }; <font class="comment">// end namespace OmniEvents</font>
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