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// **********************************************************************
//
// Copyright (c) 2001
// Mutable Realms, Inc.
// Huntsville, AL, USA
//
// All Rights Reserved
//
// **********************************************************************
#include <Ice/LocatorInfo.h>
#include <Ice/Locator.h>
#include <Ice/LocalException.h>
#include <Ice/Instance.h>
#include <Ice/TraceLevels.h>
#include <Ice/LoggerUtil.h>
#include <Ice/Endpoint.h>
#include <Ice/Reference.h>
#include <Ice/Functional.h>
#include <Ice/IdentityUtil.h>
#include <iterator>
using namespace std;
using namespace Ice;
using namespace IceInternal;
void IceInternal::incRef(LocatorManager* p) { p->__incRef(); }
void IceInternal::decRef(LocatorManager* p) { p->__decRef(); }
void IceInternal::incRef(LocatorInfo* p) { p->__incRef(); }
void IceInternal::decRef(LocatorInfo* p) { p->__decRef(); }
void IceInternal::incRef(LocatorAdapterTable* p) { p->__incRef(); }
void IceInternal::decRef(LocatorAdapterTable* p) { p->__decRef(); }
IceInternal::LocatorManager::LocatorManager() :
_tableHint(_table.end())
{
}
void
IceInternal::LocatorManager::destroy()
{
IceUtil::Mutex::Lock sync(*this);
for_each(_table.begin(), _table.end(), Ice::secondVoidMemFun<LocatorPrx, LocatorInfo>(&LocatorInfo::destroy));
_table.clear();
_tableHint = _table.end();
_adapterTables.clear();
}
LocatorInfoPtr
IceInternal::LocatorManager::get(const LocatorPrx& locator)
{
if(!locator)
{
return 0;
}
//
// TODO: reap unused locator info objects?
//
IceUtil::Mutex::Lock sync(*this);
map<LocatorPrx, LocatorInfoPtr>::iterator p = _table.end();
if(_tableHint != _table.end())
{
if(_tableHint->first == locator)
{
p = _tableHint;
}
}
if(p == _table.end())
{
p = _table.find(locator);
}
if(p == _table.end())
{
//
// Rely on locator identity for the adapter table. We want to
// have only one table per locator (not one per locator
// proxy).
//
map<Identity, LocatorAdapterTablePtr>::iterator t = _adapterTables.find(locator->ice_getIdentity());
if(t == _adapterTables.end())
{
t = _adapterTables.insert(_adapterTables.begin(),
make_pair(locator->ice_getIdentity(), new LocatorAdapterTable()));
}
_tableHint = _table.insert(_tableHint, make_pair(locator, new LocatorInfo(locator, t->second)));
}
else
{
_tableHint = p;
}
return _tableHint->second;
}
IceInternal::LocatorAdapterTable::LocatorAdapterTable()
{
}
bool
IceInternal::LocatorAdapterTable::get(const string& adapter, ::std::vector<EndpointPtr>& endpoints) const
{
IceUtil::Mutex::Lock sync(*this);
std::map<std::string, std::vector<EndpointPtr> >::const_iterator p = _adapterEndpointsMap.find(adapter);
if(p != _adapterEndpointsMap.end())
{
endpoints = p->second;
return true;
}
else
{
return false;
}
}
void
IceInternal::LocatorAdapterTable::clear()
{
IceUtil::Mutex::Lock sync(*this);
_adapterEndpointsMap.clear();
}
void
IceInternal::LocatorAdapterTable::add(const string& adapter, const ::std::vector<EndpointPtr>& endpoints)
{
IceUtil::Mutex::Lock sync(*this);
_adapterEndpointsMap.insert(make_pair(adapter, endpoints));
}
::std::vector<EndpointPtr>
IceInternal::LocatorAdapterTable::remove(const string& adapter)
{
IceUtil::Mutex::Lock sync(*this);
std::map<std::string, std::vector<EndpointPtr> >::iterator p = _adapterEndpointsMap.find(adapter);
if(p == _adapterEndpointsMap.end())
{
return std::vector<EndpointPtr>();
}
std::vector<EndpointPtr> endpoints = p->second;
_adapterEndpointsMap.erase(p);
return endpoints;
}
IceInternal::LocatorInfo::LocatorInfo(const LocatorPrx& locator, const LocatorAdapterTablePtr& adapterTable) :
_locator(locator),
_adapterTable(adapterTable)
{
assert(_locator);
assert(_adapterTable);
}
void
IceInternal::LocatorInfo::destroy()
{
IceUtil::Mutex::Lock sync(*this);
_locator = 0;
_locatorRegistry = 0;
_adapterTable->clear();
}
bool
IceInternal::LocatorInfo::operator==(const LocatorInfo& rhs) const
{
return _locator == rhs._locator;
}
bool
IceInternal::LocatorInfo::operator!=(const LocatorInfo& rhs) const
{
return _locator != rhs._locator;
}
bool
IceInternal::LocatorInfo::operator<(const LocatorInfo& rhs) const
{
return _locator < rhs._locator;
}
LocatorPrx
IceInternal::LocatorInfo::getLocator() const
{
//
// No mutex lock necessary, _locator is immutable.
//
return _locator;
}
LocatorRegistryPrx
IceInternal::LocatorInfo::getLocatorRegistry()
{
IceUtil::Mutex::Lock sync(*this);
if(!_locatorRegistry) // Lazy initialization.
{
_locatorRegistry = _locator->getRegistry();
}
return _locatorRegistry;
}
std::vector<EndpointPtr>
IceInternal::LocatorInfo::getEndpoints(const ReferencePtr& ref, bool& cached)
{
::std::vector<EndpointPtr> endpoints;
if(!ref->adapterId.empty())
{
cached = true;
if(!_adapterTable->get(ref->adapterId, endpoints))
{
cached = false;
//
// Search the adapter in the location service if we didn't
// find it in the cache.
//
try
{
ObjectPrx object = _locator->findAdapterByName(ref->adapterId);
if(object)
{
endpoints = object->__reference()->endpoints;
}
}
catch(const LocalException& ex)
{
//
// Just trace the failure. The proxy will most likely get empty
// endpoints and raise a NoEndpointException().
//
if(ref->instance->traceLevels()->location >= 1)
{
Trace out(ref->instance->logger(), ref->instance->traceLevels()->locationCat);
out << "couldn't contact the locator to retrieve adapter endpoints\n";
out << "adapter = " << ref->adapterId << "\n";
out << "reason = " << ex;
}
}
//
// Add to the cache.
//
if(!endpoints.empty())
{
_adapterTable->add(ref->adapterId, endpoints);
}
}
if(!endpoints.empty())
{
if(ref->instance->traceLevels()->location >= 1)
{
Trace out(ref->instance->logger(), ref->instance->traceLevels()->locationCat);
if(cached)
{
out << "found endpoints in locator table\n";
}
else
{
out << "retrieved endpoints from locator, adding to locator table\n";
}
out << "adapter = " << ref->adapterId << "\n";
const char* sep = endpoints.size() > 1 ? ":" : "";
ostringstream o;
transform(endpoints.begin(), endpoints.end(), ostream_iterator<string>(o, sep),
::Ice::constMemFun(&Endpoint::toString));
out << "endpoints = " << o.str();
}
}
}
else
{
cached = false;
}
return endpoints;
}
void
IceInternal::LocatorInfo::clearCache(const ReferencePtr& ref)
{
if(!ref->adapterId.empty())
{
std::vector<EndpointPtr> endpoints = _adapterTable->remove(ref->adapterId);
if(!endpoints.empty())
{
if(ref->instance->traceLevels()->location >= 1)
{
Trace out(ref->instance->logger(), ref->instance->traceLevels()->locationCat);
out << "removed endpoints from locator table\n";
out << "adapter = " << ref->adapterId;
const char* sep = endpoints.size() > 1 ? ":" : "";
ostringstream o;
transform(endpoints.begin(), endpoints.end(), ostream_iterator<string>(o, sep),
::Ice::constMemFun(&Endpoint::toString));
out << "endpoints = " << o.str();
}
}
}
}
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