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// **********************************************************************
//
// Copyright (c) 2003-2006 ZeroC, Inc. All rights reserved.
//
// This copy of Ice is licensed to you under the terms described in the
// ICE_LICENSE file included in this distribution.
//
// **********************************************************************
#include <Ice/Ice.h>
#include <IceGrid/NodeSessionManager.h>
#include <IceGrid/TraceLevels.h>
#include <IceGrid/NodeI.h>
#include <IceGrid/Query.h>
using namespace std;
using namespace IceGrid;
NodeSessionKeepAliveThread::NodeSessionKeepAliveThread(const InternalRegistryPrx& registry,
const NodeIPtr& node) :
_registry(InternalRegistryPrx::uncheckedCast(registry->ice_adapterId(""))),
_node(node),
_timeout(IceUtil::Time::seconds(5)),
_shutdown(false)
{
}
void
NodeSessionKeepAliveThread::run()
{
//
// Keep alive the session.
//
NodeSessionPrx session;
while(true)
{
keepAlive(session);
{
Lock sync(*this);
session = _session;
if(!_shutdown)
{
timedWait(_timeout);
}
if(_shutdown)
{
break;
}
}
}
//
// Destroy the session.
//
if(session)
{
try
{
session->destroy();
}
catch(const Ice::LocalException&)
{
//
// TODO: XXX: TRACE?
//
// ostringstream os;
// os << "couldn't contact the IceGrid registry to destroy the node session:\n" << ex;
// _node->getTraceLevels()->logger->warning(os.str());
}
}
}
void
NodeSessionKeepAliveThread::waitForCreate()
{
Lock sync(*this);
while(!_session)
{
wait();
}
}
void
NodeSessionKeepAliveThread::terminate()
{
Lock sync(*this);
_shutdown = true;
notifyAll();
}
void
NodeSessionKeepAliveThread::keepAlive(const NodeSessionPrx& session)
{
if(session)
{
try
{
session->keepAlive(_node->getPlatformInfo().getLoadInfo());
return; // We're done!
}
catch(const Ice::LocalException&)
{
}
}
try
{
NodeSessionPrx newSession = _node->registerWithRegistry(_registry);
int timeout = newSession->getTimeout();
{
Lock sync(*this);
if(timeout > 0)
{
_timeout = IceUtil::Time::seconds(timeout);
}
_session = newSession;
notifyAll();
}
}
catch(const NodeActiveException&)
{
_node->getTraceLevels()->logger->error("a node with the same name is already registered and active");
}
catch(const Ice::LocalException&)
{
//
// TODO: FIX THIS SHOULD BE A TRACE
//
// ostringstream os;
// os << "couldn't contact the IceGrid registry:\n" << ex;
// _node->getTraceLevels()->logger->warning(os.str());
}
}
NodeSessionManager::NodeSessionManager()
{
}
void
NodeSessionManager::create(const NodeIPtr& node)
{
assert(!_node);
const_cast<NodeIPtr&>(_node) = node;
Ice::CommunicatorPtr communicator = _node->getCommunicator();
Ice::PropertiesPtr properties = communicator->getProperties();
Ice::LocatorPrx locator = communicator->getDefaultLocator();
assert(locator);
string instanceName = locator->ice_getIdentity().category;
QueryPrx query = QueryPrx::uncheckedCast(communicator->stringToProxy(instanceName + "/Query"));
Ice::ObjectProxySeq proxies = query->findAllObjectsByType(InternalRegistry::ice_staticId());
NodeSessionKeepAliveThreadPtr thread;
Lock sync(*this);
for(Ice::ObjectProxySeq::const_iterator p = proxies.begin(); p != proxies.end(); ++p)
{
thread = new NodeSessionKeepAliveThread(InternalRegistryPrx::uncheckedCast(*p), _node);
thread->start();
_sessions.insert(make_pair((*p)->ice_getIdentity(), thread));
}
}
void
NodeSessionManager::waitForCreate()
{
Lock sync(*this);
for(NodeSessionMap::const_iterator p = _sessions.begin(); p != _sessions.end(); ++p)
{
p->second->waitForCreate();
}
}
void
NodeSessionManager::destroy()
{
Lock sync(*this);
NodeSessionMap::const_iterator p;
for(p = _sessions.begin(); p != _sessions.end(); ++p)
{
p->second->terminate();
}
for(p = _sessions.begin(); p != _sessions.end(); ++p)
{
p->second->getThreadControl().join();
}
}
void
NodeSessionManager::replicaAdded(const InternalRegistryPrx& replica)
{
Lock sync(*this);
if(_sessions.find(replica->ice_getIdentity()) != _sessions.end())
{
return;
}
NodeSessionKeepAliveThreadPtr thread = new NodeSessionKeepAliveThread(replica, _node);
thread->start();
_sessions.insert(make_pair(replica->ice_getIdentity(), thread));
}
void
NodeSessionManager::replicaRemoved(const InternalRegistryPrx& replica)
{
NodeSessionKeepAliveThreadPtr thread;
{
Lock sync(*this);
NodeSessionMap::iterator p = _sessions.find(replica->ice_getIdentity());
if(p != _sessions.end())
{
thread = p->second;
_sessions.erase(p);
}
}
if(thread)
{
thread->terminate();
thread->getThreadControl().join();
}
}
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