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// **********************************************************************
//
// Copyright (c) 2001
// MutableRealms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <Ice/Ice.h>
#include <IcePack/Forward.h>
#include <IcePack/Admin.h>
#include <sstream>
using namespace std;
using namespace Ice;
using namespace IcePack;
IcePack::Forward::Forward(const CommunicatorPtr& communicator, const AdminPtr& admin) :
_communicator(communicator),
_admin(admin)
{
#ifndef WIN32
_activator = new Activator(_communicator);
_activator->start();
PropertiesPtr properties = communicator->getProperties();
string value;
value = properties->getProperty("IcePack.Activator.WaitTime");
if (value.length())
{
_waitTime = atoi(value.c_str());
if (_waitTime < 0)
{
_waitTime = 0;
}
}
else
{
_waitTime = 10;
}
#endif
}
IcePack::Forward::~Forward()
{
#ifndef WIN32
_activator->destroy();
#endif
}
ObjectPtr
IcePack::Forward::locate(const ObjectAdapterPtr& adapter, const string& identity, ObjectPtr&)
{
//
// Look up the server description
//
ServerDescription desc = _admin->find(identity);
//
// If we didn't find a server description, we return null, meaning
// that the client will get an "object not exist" exception.
//
if (!desc.object)
{
return 0;
}
#ifndef WIN32
//
// We only try to activate if we have a path for the server
//
if (!desc.path.empty())
{
try
{
bool doSleep = false;
int count = 0;
while (true)
{
try
{
//
// Activate the server. If the server is already
// running, this operation does nothing.
//
if (_activator->activate(desc))
{
//
// If we just activated the server, we sleep
// below, to give the server some time to
// start up.
//
doSleep = true;
}
if (doSleep)
{
sleep(1);
}
//
// Try to ping the server, to make sure that it is
// really running. Note that even if activate()
// above returns false, i.e., if activate()
// indicates that the server was already running,
// it's still possible that the server shut down
// in the meantime, for example, because of a
// server timeout, a crash, or an explicit
// shutdown method.
//
desc.object->_ping();
//
// Everything ok, the server is now up and
// running. The ping above also has the effect
// that the server idle timeout (if set) has been
// reset. If we wouldn't ping, there would be a
// higher chance that the server shuts down
// because of an idle timeout while we send back
// the location forward to the client.
//
break;
}
catch(const SocketException&)
{
//
// Ooops, we got a socket exception while trying
// to ping the server. Let's set the doSleep flag
// to give the server more time before we try
// again.
//
if (++count >= _waitTime)
{
throw;
}
doSleep = true;
}
}
}
catch(const LocalException& ex)
{
//
// If we get an exception, all we an do is to log it and
// to send a location forward to the client, which will
// then get a similar exception.
//
ostringstream s;
s << "exception during server activation:\n" << ex;
_communicator->getLogger()->error(s.str());
}
}
#endif
throw LocationForward(desc.object);
}
void
IcePack::Forward::finished(const ObjectAdapterPtr&, const string&, const ObjectPtr&, const ObjectPtr&)
{
// Nothing to do
}
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