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//
// Copyright (c) ZeroC, Inc. All rights reserved.
//
#include <Ice/Communicator.h>
#include <Ice/LocalException.h>
#include <Ice/LoggerUtil.h>
#include <IceGrid/ReplicaCache.h>
#include <IceGrid/ReplicaSessionI.h>
#include <IceGrid/Topics.h>
using namespace std;
using namespace IceGrid;
ReplicaCache::ReplicaCache(const shared_ptr<Ice::Communicator>& communicator,
const shared_ptr<IceStorm::TopicManagerPrx>& topicManager) :
_communicator(communicator)
{
shared_ptr<IceStorm::TopicPrx> t;
try
{
t = topicManager->create("ReplicaObserverTopic");
}
catch(const IceStorm::TopicExists&)
{
t = topicManager->retrieve("ReplicaObserverTopic");
}
const_cast<shared_ptr<IceStorm::TopicPrx>&>(_topic) =
Ice::uncheckedCast<IceStorm::TopicPrx>(t->ice_endpoints(Ice::EndpointSeq()));
const_cast<shared_ptr<ReplicaObserverPrx>&>(_observers) =
Ice::uncheckedCast<ReplicaObserverPrx>(_topic->getPublisher()->ice_endpoints(Ice::EndpointSeq()));
}
shared_ptr<ReplicaEntry>
ReplicaCache::add(const string& name, const shared_ptr<ReplicaSessionI>& session)
{
unique_lock lock(_mutex);
shared_ptr<ReplicaEntry> entry;
while((entry = getImpl(name)))
{
auto s = entry->getSession();
if(s->isDestroyed())
{
// Wait for the session to be removed.
_condVar.wait(lock);
}
else
{
//
// Check if the replica is still reachable, if not, we
// destroy its session.
//
lock.unlock();
try
{
s->getInternalRegistry()->ice_ping();
throw ReplicaActiveException();
}
catch(const Ice::LocalException&)
{
try
{
s->destroy(Ice::emptyCurrent);
}
catch(const Ice::LocalException&)
{
}
}
lock.lock();
}
}
if(_traceLevels && _traceLevels->replica > 0)
{
Ice::Trace out(_traceLevels->logger, _traceLevels->replicaCat);
out << "replica `" << name << "' up";
}
try
{
_observers->replicaAdded(session->getInternalRegistry());
}
catch(const Ice::NoEndpointException&)
{
// Expected if the replica is being shutdown.
}
catch(const Ice::ObjectAdapterDeactivatedException&)
{
// Expected if the replica is being shutdown.
}
catch(const Ice::LocalException& ex)
{
auto traceLevels = getTraceLevels();
if(traceLevels)
{
Ice::Warning out(traceLevels->logger);
out << "unexpected exception while publishing `replicaAdded' update:\n" << ex;
}
}
return addImpl(name, make_shared<ReplicaEntry>(name, session));
}
shared_ptr<ReplicaEntry>
ReplicaCache::remove(const string& name, bool shutdown)
{
lock_guard lock(_mutex);
auto entry = getImpl(name);
assert(entry);
removeImpl(name);
_condVar.notify_all();
if(_traceLevels && _traceLevels->replica > 0)
{
Ice::Trace out(_traceLevels->logger, _traceLevels->replicaCat);
out << "replica `" << name << "' down";
}
if(!shutdown)
{
try
{
_observers->replicaRemoved(entry->getProxy());
}
catch(const Ice::NoEndpointException&)
{
// Expected if the replica is being shutdown.
}
catch(const Ice::ObjectAdapterDeactivatedException&)
{
// Expected if the replica is being shutdown.
}
catch(const Ice::LocalException& ex)
{
auto traceLevels = getTraceLevels();
if(traceLevels)
{
Ice::Warning out(traceLevels->logger);
out << "unexpected exception while publishing `replicaRemoved' update:\n" << ex;
}
}
}
return entry;
}
shared_ptr<ReplicaEntry>
ReplicaCache::get(const string& name) const
{
lock_guard lock(_mutex);
auto entry = getImpl(name);
if(!entry)
{
throw RegistryNotExistException(name);
}
return entry;
}
void
ReplicaCache::subscribe(const shared_ptr<ReplicaObserverPrx>& observer)
{
try
{
lock_guard lock(_mutex);
InternalRegistryPrxSeq replicas;
for(const auto& entry : _entries)
{
replicas.push_back(entry.second->getProxy());
}
IceStorm::QoS qos;
qos["reliability"] = "ordered";
auto publisher = _topic->subscribeAndGetPublisher(qos, observer->ice_twoway());
Ice::uncheckedCast<ReplicaObserverPrx>(publisher)->replicaInit(replicas);
}
catch(const Ice::NoEndpointException&)
{
// The replica is being shutdown.
}
catch(const Ice::ObjectAdapterDeactivatedException&)
{
// Expected if the replica is being shutdown.
}
catch(const Ice::LocalException& ex)
{
auto traceLevels = getTraceLevels();
if(traceLevels)
{
Ice::Warning out(traceLevels->logger);
out << "unexpected exception while subscribing observer from replica observer topic:\n" << ex;
}
}
}
void
ReplicaCache::unsubscribe(const shared_ptr<ReplicaObserverPrx>& observer)
{
try
{
_topic->unsubscribe(observer);
}
catch(const Ice::ObjectAdapterDeactivatedException&)
{
// The replica is being shutdown.
}
catch(const Ice::NoEndpointException&)
{
// The replica is being shutdown.
}
catch(const Ice::LocalException& ex)
{
auto traceLevels = getTraceLevels();
if(traceLevels)
{
Ice::Warning out(traceLevels->logger);
out << "unexpected exception while unsubscribing observer from replica observer topic:\n" << ex;
}
}
}
shared_ptr<Ice::ObjectPrx>
ReplicaCache::getEndpoints(const string& name, const shared_ptr<Ice::ObjectPrx>& proxy) const
{
Ice::EndpointSeq endpoints;
if(proxy)
{
Ice::EndpointSeq endpts = proxy->ice_getEndpoints();
endpoints.insert(endpoints.end(), endpts.begin(), endpts.end());
}
lock_guard lock(_mutex);
for(const auto& entry : _entries)
{
auto prx = entry.second->getSession()->getEndpoint(name);
if(prx)
{
Ice::EndpointSeq endpts = prx->ice_getEndpoints();
endpoints.insert(endpoints.end(), endpts.begin(), endpts.end());
}
}
return _communicator->stringToProxy("dummy")->ice_endpoints(endpoints);
}
void
ReplicaCache::setInternalRegistry(const shared_ptr<InternalRegistryPrx>& proxy)
{
//
// Setup this replica internal registry proxy.
//
_self = proxy;
}
shared_ptr<InternalRegistryPrx>
ReplicaCache::getInternalRegistry() const
{
//
// This replica internal registry proxy.
//
return _self;
}
ReplicaEntry::ReplicaEntry(const std::string& name, const shared_ptr<ReplicaSessionI>& session) :
_name(name),
_session(session)
{
}
const shared_ptr<ReplicaSessionI>&
ReplicaEntry::getSession() const
{
return _session;
}
shared_ptr<InternalReplicaInfo>
ReplicaEntry::getInfo() const
{
return _session->getInfo();
}
shared_ptr<InternalRegistryPrx>
ReplicaEntry::getProxy() const
{
return _session->getInternalRegistry();
}
shared_ptr<Ice::ObjectPrx>
ReplicaEntry::getAdminProxy() const
{
auto prx = getProxy();
assert(prx);
Ice::Identity adminId = { "RegistryAdmin-" + _name, prx->ice_getIdentity().category };
return prx->ice_identity(move(adminId));
}
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