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<p class=MsoNormal>Hi<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><b>Requirement</b>: Corba server should be persistent so
that even if the Corba server application restarted, or the computer hosting
Corba server is rebooted, Corba Client application need not be reinitialized.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><b><u>Server Side Implementation</u>:<o:p></o:p></b></p>

<p class=MsoNormal><b><o:p>&nbsp;</o:p></b></p>

<p class=MsoNormal><b>main()<o:p></o:p></b></p>

<p class=MsoNormal><b>{<o:p></o:p></b></p>

<p class=MsoNormal style='text-autospace:none'><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </b><span
style='font-size:10.0pt;font-family:"Courier New"'>CORBA::ORB_var objCorbaOrb;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; objCorbaOrb =
CORBA::ORB_init(argc, argv);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CORBA::Object_var obj
= objCorbaOrb-&gt;resolve_initial_references(<span style='color:#A31515'>&quot;omniINSPOA&quot;</span>);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
PortableServer::POA_var rootPOA = PortableServer::POA::_narrow(obj);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp; &nbsp;&nbsp;&nbsp;&nbsp;CServerObj* pSvr = <span
style='color:blue'>new</span> CServerObj();<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PortableServer::POAManager_var
objPOAManager = rootPOA-&gt;the_POAManager();<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; PortableServer::ObjectId_var
myObjID = PortableServer::string_to_ObjectId(<span style='color:#A31515'>&quot;IMC.context/Diagnostics.Object&quot;</span>);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rootPOA-&gt;activate_object_with_id(myObjID,
pSvr);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; obj =
rootPOA-&gt;servant_to_reference(pSvr);</span><b><o:p></o:p></b></p>

<p class=MsoNormal><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></b></p>

<p class=MsoNormal style='text-autospace:none'><b>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </b><span
style='font-size:10.0pt;font-family:"Courier New";color:blue'>if</span><span
style='font-size:10.0pt;font-family:"Courier New"'>(
!bindObjectToName(objCorbaOrb, obj) )<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:blue'>return</span> 1;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CosNaming::NamingContext_var
rootContext;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;<span
style='color:green'>// Obtain a reference to the root context of the Name
service:<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CORBA::Object_var
obj;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; obj = objCorbaOrb-&gt;resolve_initial_references(<span
style='color:#A31515'>&quot;NameService&quot;</span>);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:green'>// Narrow the reference returned.<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; rootContext =
CosNaming::NamingContext::_narrow(obj);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:green'>// Bind a context to the root context:<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CosNaming::Name
contextName;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
contextName.length(1);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
contextName[0].id&nbsp;&nbsp; = (<span style='color:blue'>const</span> <span
style='color:blue'>char</span>*) <span style='color:#A31515'>&quot;IMC&quot;</span>;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
<span style='color:green'>// string copied<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; contextName[0].kind =
(<span style='color:blue'>const</span> <span style='color:blue'>char</span>*) <span
style='color:#A31515'>&quot;context&quot;</span>; <span style='color:green'>//
string copied<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CosNaming::NamingContext_var
testContext;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:green'>// Bind the context to root.<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; testContext =
rootContext-&gt;bind_new_context(contextName);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:green'>// Bind objref <o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CosNaming::Name
objectName;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; objectName.length(1);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
objectName[0].id&nbsp;&nbsp; = (<span style='color:blue'>const</span> <span
style='color:blue'>char</span>*) <span style='color:#A31515'>&quot;Diagnostics&quot;</span>;&nbsp;&nbsp;
<span style='color:green'>// string copied<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; objectName[0].kind =
(<span style='color:blue'>const</span> <span style='color:blue'>char</span>*) <span
style='color:#A31515'>&quot;Object&quot;</span>; <span style='color:green'>//
string copied<o:p></o:p></span></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp; &nbsp;&nbsp;&nbsp;testContext-&gt;bind(objectName,
obj);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; pSvr-&gt;_remove_ref();<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
objPOAManager-&gt;activate();<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
objCorbaOrb-&gt;run();</span><b><o:p></o:p></b></p>

<p class=MsoNormal><b>}<br>
<br>
<o:p></o:p></b></p>

<p class=MsoNormal><b><o:p>&nbsp;</o:p></b></p>

<p class=MsoNormal><b><u>Client Side Implementation<o:p></o:p></u></b></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>main()<o:p></o:p></p>

<p class=MsoNormal>{<o:p></o:p></p>

<p class=MsoNormal>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <o:p></o:p></p>

<p class=MsoNormal style='text-autospace:none'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='font-size:10.0pt;font-family:"Courier New"'>std::string&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; szCorbaName
= <span style='color:#A31515'>&quot;corbaname::&quot;</span>;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; std::string&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; szCorbaId&nbsp;&nbsp;
= <span style='color:#A31515'>&quot;:2809#IMC.context/Diagnostics.Object&quot;</span>;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; szCorbaName +=
szIPAddress;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; szCorbaName +=
szCorbaId;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:blue'>int</span> nArg = 0;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m_objORB =
CORBA::ORB_init(nArg, NULL);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; CORBA::Object_var obj
= m_objORB-&gt;string_to_object(szCorbaName.c_str());<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:blue'>if</span>( CORBA::is_nil(obj) )<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:blue'>return</span> <span style='color:blue'>false</span>;<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; } <o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; m_objServerObj = IServerObj::_narrow(obj);<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'><o:p>&nbsp;</o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <span
style='color:blue'>if</span>( CORBA::is_nil(m_objServerObj) )<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; {<o:p></o:p></span></p>

<p class=MsoNormal style='text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; r<span
style='color:blue'>eturn</span> <span style='color:blue'>false</span>;<o:p></o:p></span></p>

<p class=MsoNormal><span style='font-size:10.0pt;font-family:"Courier New"'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; }&nbsp;&nbsp;&nbsp;
</span><o:p></o:p></p>

<p class=MsoNormal>}<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><b><u>Problem:<o:p></o:p></u></b></p>

<p class=MsoNormal>When the client is freshly initialized the communication
object (<span style='font-size:10.0pt;font-family:"Courier New"'>m_objServerObj
in the client code</span>) there is no issue. But once server goes down or
rebooted, existing client object(<span style='font-size:10.0pt;font-family:
"Courier New"'>m_objServerObj</span>)<o:p></o:p></p>

<p class=MsoNormal>fails to invoke server calls for the first time, but if I
try(somehow) to make the invoke call for 2nd time on the same client object it
succeeds.<o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Can someone help me to figure out what could be the issue
here. <o:p></o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal><o:p>&nbsp;</o:p></p>

<p class=MsoNormal>Regards<o:p></o:p></p>

<p class=MsoNormal>Dhruba<o:p></o:p></p>

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