//TODO: ServiceEvent should be RemoteService and ServiceDescription
void ServiceDiscovery::addedService(const RemoteService& service)
{
ServiceEvent event(service);
ServiceConfiguration remoteConfig = service.getConfiguration();
if(mLocalService && mMode == PUBLISH)
{
ServiceConfiguration localConfig = mLocalService->getConfiguration();
if ( localConfig.getName() == remoteConfig.getName() && localConfig.getType() == remoteConfig.getType())
{
LOG_INFO("Service published: %s", service.getName().c_str());
mPublished = true;
}
}
{
boost::unique_lock<boost::mutex> lock(mServicesMutex);
ServiceDescription configuration = service.getConfiguration();
LOG_INFO("+ %s type: %s", configuration.getName().c_str(), configuration.getType().c_str());
mServices.push_back( configuration );
}
{
boost::unique_lock<boost::mutex> lock(mAddedComponentMutex);
ServiceAddedSignal.emit( event );
}
}
void ServiceDiscovery::removedService(const RemoteService& service)
{
ServiceEvent event(service);
ServiceDescription serviceDescription = event.getServiceConfiguration();
boost::unique_lock<boost::mutex> lock(mServicesMutex);
List<ServiceDescription>::iterator it = mServices.find(serviceDescription);
if (it != mServices.end())
{
{
boost::unique_lock<boost::mutex> removalLock(mRemovedComponentMutex);
ServiceDescription configuration = *it;
LOG_INFO("- %s type: %s", configuration.getName().c_str(), configuration.getType().c_str());
ServiceRemovedSignal.emit( event );
}
mServices.erase(it);
}
}
void ServiceManager::addService(Service* service, ServiceDescription& desc) {
RScopeLock lock(_mutex);
if (service == NULL)
return;
intptr_t svcPtr = (intptr_t)service;
if (_svc.find(svcPtr) != _svc.end())
return;
desc._channelName = service->getChannelName();
desc._svcName = service->getName();
assert(desc._channelName.length() > 0);
_svc[svcPtr] = service;
_localSvcDesc[svcPtr] = desc;
// connect service to all nodes the manager is connected to
std::set<Node>::iterator nodeIter;
nodeIter = _nodes.begin();
while(nodeIter != _nodes.end()) {
((Node)*nodeIter).connect(service);
nodeIter++;
}
// iterate continuous queries and notify other service managers about matches.
std::map<std::string, ServiceFilter>::iterator filterIter = _remoteQueries.begin();
while(filterIter != _remoteQueries.end()) {
if (filterIter->second.matches(desc)) {
Message* foundMsg = desc.toMessage();
foundMsg->putMeta("um.rpc.filterId", filterIter->second._uuid);
foundMsg->putMeta("um.rpc.type", "discovered");
foundMsg->putMeta("um.rpc.channel", desc.getChannelName());
foundMsg->putMeta("um.rpc.mgrId", _svcSub->getUUID());
_svcPub->send(foundMsg);
delete foundMsg;
}
filterIter++;
}
}
void ServiceManager::removeService(Service* service) {
RScopeLock lock(_mutex);
if (service == NULL)
return;
intptr_t svcPtr = (intptr_t)service;
if (_svc.find(svcPtr) == _svc.end())
return;
std::set<Node>::iterator nodeIter = _nodes.begin();
while(nodeIter != _nodes.end()) {
((Node)*nodeIter).disconnect(service);
nodeIter++;
}
assert(_localSvcDesc.find(svcPtr)!= _localSvcDesc.end());
ServiceDescription desc = _localSvcDesc[svcPtr];
// iterate continuous queries and notify other service managers about removals.
std::map<std::string, ServiceFilter>::iterator filterIter = _remoteQueries.begin();
while(filterIter != _remoteQueries.end()) {
if (filterIter->second.matches(desc)) {
Message* removeMsg = desc.toMessage();
removeMsg->putMeta("um.rpc.filterId", filterIter->second._uuid);
removeMsg->putMeta("um.rpc.type", "vanished");
removeMsg->putMeta("um.rpc.channel", desc.getChannelName());
removeMsg->putMeta("um.rpc.mgrId", _svcSub->getUUID());
_svcPub->send(removeMsg);
delete removeMsg;
}
filterIter++;
}
_svc.erase(svcPtr);
_localSvcDesc.erase(svcPtr);
}
std::vector<ServiceDescription> ServiceDiscovery::findServices(const ServicePattern& pattern, const std::string& name_space) const
{
std::vector<ServiceDescription> result;
List<ServiceDescription>::const_iterator it;
boost::unique_lock<boost::mutex> lock(mServicesMutex);
for (it = mServices.begin(); it != mServices.end(); it++)
{
ServiceDescription description = *it;
std::string serviceprop = description.getDescription("service");
size_t namespace_begin = serviceprop.find_first_of(":") + 1;
if((name_space == "*" || serviceprop.compare(namespace_begin, name_space.size(), name_space) == 0)
&& pattern.matchDescription(description) )
{
result.push_back(description);
}
}
return result;
}
void ServiceDiscovery::updatedService(const RemoteService& service)
{
ServiceDescription desc = service.getConfiguration();
boost::unique_lock<boost::mutex> lock(mServicesMutex);
List<ServiceDescription>::iterator it;
for(it = mServices.begin(); it != mServices.end(); it++)
{
if( desc.compareWithoutTXT(*it) )
{
std::vector<std::string> labels = desc.getLabels();
for(unsigned int i = 0; i < labels.size(); i++)
{
it->setDescription(labels[i], desc.getDescription(labels[i]));
}
LOG_INFO("Updated service: %s", service.getName().c_str());
}
}
}
void ServiceDiscovery::update(const ServiceDescription& desc)
{
if(mLocalService != NULL)
{
std::list<std::string> raw_desc = desc.getRawDescriptions();
UniqueClientLock lock;
mLocalService->updateStringList(raw_desc);
LOG_INFO("Updated local service: %s", mLocalService->getName().c_str());
} else {
LOG_FATAL("Service Discovery tries to update a description on a non-started local service.\n");
throw std::runtime_error("Service Discovery tries to update a description on a non-started local service");
}
}
void ServiceManager::removeService(Service* service) {
ScopeLock lock(&_mutex);
if (service == NULL)
return;
intptr_t svcPtr = (intptr_t)service;
if (_svc.find(svcPtr) == _svc.end())
return;
std::set<Node*>::iterator nodeIter = _nodes.begin();
while(nodeIter != _nodes.end()) {
(*nodeIter++)->disconnect(service);
}
assert(_localSvcDesc.find(svcPtr)!= _localSvcDesc.end());
ServiceDescription* desc = _localSvcDesc[svcPtr];
// iterate continuous queries and notify other service managers about removals.
std::map<string, ServiceFilter*>::iterator filterIter = _remoteQueries.begin();
while(filterIter != _remoteQueries.end()) {
if (filterIter->second->matches(desc)) {
Message* removeMsg = desc->toMessage();
removeMsg->setMeta("filterId", filterIter->second->_uuid);
removeMsg->setMeta("type", "serviceDiscRemoved");
removeMsg->setMeta("desc:channel", desc->getChannelName());
_svcPub->send(removeMsg);
delete removeMsg;
}
filterIter++;
}
_svc.erase(svcPtr);
_localSvcDesc.erase(svcPtr);
}
int main(int argc, char** argv) {
Node n;
ServiceManager svcMgr;
Discovery disc(Discovery::MDNS);
disc.add(n);
// set some random properties to query for
ServiceDescription echoSvcDesc;
echoSvcDesc.setProperty("host", Host::getHostId());
echoSvcDesc.setProperty("someString", "this is some random string with 123 numbers inside");
echoSvcDesc.setProperty("someNumber", "1");
EchoService* echoSvc = new EchoService();
svcMgr.addService(echoSvc, echoSvcDesc);
PingService* pingSvc = new PingService();
svcMgr.addService(pingSvc);
n.connect(&svcMgr);
while(true)
Thread::sleepMs(1000);
}
bool ServiceDescription::operator==(const ServiceDescription& other) const
{
if(!compareWithoutTXT(other))
return false;
std::vector<std::string> labels = this->getLabels();
int labelsSize = labels.size();
for(int i = 0; i < labelsSize; i++)
{
std::string label = labels_[i];
if(this->getDescription(label) != other.getDescription(label))
return false;
}
return true;
}
bool ServiceDescription::compareWithoutTXT(const ServiceDescription& other) const
{
if( interfaceIndex_ != other.getInterfaceIndex() && !(interfaceIndex_ == AVAHI_IF_UNSPEC || other.getInterfaceIndex() == AVAHI_IF_UNSPEC))
return false;
if(protocol_ != other.getProtocol() && !(protocol_ == AVAHI_PROTO_UNSPEC || other.getProtocol() == AVAHI_PROTO_UNSPEC))
return false;
if( getName() != other.getName())
return false;
if( getType() != other.getType())
return false;
// Compare domains and ignore consider that "" defaults to 'local'
std::string td1 = (domain_ == "" || domain_ == "local") ? "" : domain_;
std::string td2 = (other.getDomain() == "" || other.getDomain() == "local") ? "" : other.getDomain();
if (td1 != td2)
return false;
return true;
}
void ServiceManager::receive(Message* msg) {
RScopeLock lock(_mutex);
// is this a response for one of our requests?
if (msg->getMeta().find("um.rpc.respId") != msg->getMeta().end()) {
std::string respId = msg->getMeta("um.rpc.respId");
if (_findRequests.find(respId) != _findRequests.end()) {
// put message into responses and signal waiting thread
_findResponses[respId] = new Message(*msg);
_findRequests[respId]->signal();
}
}
// is someone simply asking for a service via find?
if (msg->getMeta().find("um.rpc.type") != msg->getMeta().end() &&
msg->getMeta("um.rpc.type").compare("discover") == 0) {
ServiceFilter filter(msg);
std::set<ServiceDescription> foundSvcs = findLocal(filter);
if (foundSvcs.size() > 0) {
ServiceDescription svcDesc = (*(foundSvcs.begin()));
Message* foundMsg = svcDesc.toMessage();
foundMsg->setReceiver(msg->getMeta("um.rpc.mgrId"));
foundMsg->putMeta("um.rpc.respId", msg->getMeta("um.rpc.reqId"));
foundMsg->putMeta("um.rpc.mgrId", _svcSub->getUUID());
// if (_svcPub->isPublishingTo(msg->getMeta("um.rpc.mgrId"))) {
_svcPub->send(foundMsg);
// } else {
// // queue message and send in welcome
// _pendingMessages[msg->getMeta("um.rpc.mgrId")].push_back(std::make_pair(Thread::getTimeStampMs(), foundMsg));
// }
delete foundMsg;
}
}
// is this the start of a continuous query?
if (msg->getMeta().find("um.rpc.type") != msg->getMeta().end() &&
msg->getMeta("um.rpc.type").compare("startDiscovery") == 0) {
ServiceFilter filter(msg);
_remoteQueries[filter.getUUID()] = filter;
UM_LOG_INFO("Received query for '%s'", filter._svcName.c_str());
// do we have such a service?
std::set<ServiceDescription> foundSvcs = findLocal(filter);
std::set<ServiceDescription>::iterator svcDescIter = foundSvcs.begin();
while(svcDescIter != foundSvcs.end()) {
Message* foundMsg = svcDescIter->toMessage();
foundMsg->setReceiver(msg->getMeta("um.rpc.mgrId"));
foundMsg->putMeta("um.rpc.filterId", filter.getUUID());
foundMsg->putMeta("um.rpc.type", "discovered");
foundMsg->putMeta("um.rpc.mgrId", _svcSub->getUUID());
_svcPub->send(foundMsg);
delete foundMsg;
svcDescIter++;
}
}
// is this the end of a continuous query?
if (msg->getMeta().find("um.rpc.type") != msg->getMeta().end() &&
msg->getMeta("um.rpc.type").compare("stopDiscovery") == 0) {
ServiceFilter filter(msg);
if (_remoteQueries.find(filter.getUUID()) != _remoteQueries.end()) {
_remoteQueries.erase(filter.getUUID());
}
}
// is this a reply to a continuous service query?
if (msg->getMeta().find("um.rpc.type") != msg->getMeta().end() &&
(msg->getMeta("um.rpc.type").compare("discovered") == 0 ||
msg->getMeta("um.rpc.type").compare("vanished") == 0)) {
// _svcQueries comparator uses filter uuid
ServiceFilter keyFilter("");
keyFilter._uuid = msg->getMeta("um.rpc.filterId");
if (_localQueries.find(keyFilter) != _localQueries.end()) {
ResultSet<ServiceDescription>* listener = _localQueries[keyFilter];
assert(msg->getMeta("um.rpc.desc.channel").size() > 0);
assert(msg->getMeta("um.rpc.mgrId").size() > 0);
std::string svcChannel = msg->getMeta("um.rpc.desc.channel");
std::string managerId = msg->getMeta("um.rpc.mgrId");
if (_remoteSvcDesc.find(managerId) == _remoteSvcDesc.end() || _remoteSvcDesc[managerId].find(svcChannel) == _remoteSvcDesc[managerId].end()) {
_remoteSvcDesc[managerId][svcChannel] = ServiceDescription(msg);
_remoteSvcDesc[managerId][svcChannel]._svcManager = this;
}
assert(_remoteSvcDesc.find(managerId) != _remoteSvcDesc.end());
assert(_remoteSvcDesc[managerId].find(svcChannel) != _remoteSvcDesc[managerId].end());
if (msg->getMeta("um.rpc.type").compare("discovered") == 0) {
listener->added(_remoteSvcDesc[managerId][svcChannel]);
} else {
listener->removed(_remoteSvcDesc[managerId][svcChannel]);
_remoteSvcDesc[managerId].erase(svcChannel);
}
}
}
}
void ServiceManager::receive(Message* msg) {
ScopeLock lock(&_mutex);
// is this a response for one of our requests?
if (msg->getMeta().find("respId") != msg->getMeta().end()) {
string respId = msg->getMeta("respId");
if (_findRequests.find(respId) != _findRequests.end()) {
_findResponses[respId] = new Message(*msg);
_findRequests[respId].signal();
}
}
// is someone asking for a service?
if (msg->getMeta().find("type") != msg->getMeta().end() &&
msg->getMeta("type").compare("serviceDisc") == 0) {
ServiceFilter* filter = new ServiceFilter(msg);
std::set<ServiceDescription*> foundSvcs = findLocal(filter);
delete filter;
if (foundSvcs.size() > 0) {
ServiceDescription* svcDesc = (*(foundSvcs.begin()));
Message* foundMsg = svcDesc->toMessage();
foundMsg->setMeta("respId", msg->getMeta("reqId"));
foundMsg->setMeta("desc:channel", svcDesc->getChannelName());
_svcPub->send(foundMsg);
delete foundMsg;
}
}
// is this the start of a continuous query?
if (msg->getMeta().find("type") != msg->getMeta().end() &&
msg->getMeta("type").compare("serviceDiscStart") == 0) {
ServiceFilter* filter = new ServiceFilter(msg);
_remoteQueries[filter->_uuid] = filter;
// do we have such a service?
std::set<ServiceDescription*> foundSvcs = findLocal(filter);
std::set<ServiceDescription*>::iterator svcDescIter = foundSvcs.begin();
while(svcDescIter != foundSvcs.end()) {
if (filter->matches(*svcDescIter)) {
Message* foundMsg = (*svcDescIter)->toMessage();
foundMsg->setMeta("filterId", filter->_uuid);
foundMsg->setMeta("type", "serviceDiscFound");
foundMsg->setMeta("desc:channel", (*svcDescIter)->getChannelName());
_svcPub->send(foundMsg);
delete foundMsg;
}
svcDescIter++;
}
}
// is this the end of a continuous query?
if (msg->getMeta().find("type") != msg->getMeta().end() &&
msg->getMeta("type").compare("serviceDiscStop") == 0) {
ServiceFilter* filter = new ServiceFilter(msg);
if (_remoteQueries.find(filter->_uuid) != _remoteQueries.end()) {
delete _remoteQueries[filter->_uuid];
_remoteQueries.erase(filter->_uuid);
}
delete filter;
}
// is this a reply to a continuous service query?
if (msg->getMeta().find("type") != msg->getMeta().end() &&
(msg->getMeta("type").compare("serviceDiscFound") == 0 ||
msg->getMeta("type").compare("serviceDiscRemoved") == 0)) {
// _svcQueries comparator uses filter uuid
ServiceFilter* keyFilter = new ServiceFilter("");
keyFilter->_uuid = msg->getMeta("filterId");
if (_localQueries.find(keyFilter) != _localQueries.end()) {
ResultSet<ServiceDescription>* listener = _localQueries[keyFilter];
assert(msg->getMeta("desc:channel").size() > 0);
if (_remoteSvcDesc.find(msg->getMeta("desc:channel")) == _remoteSvcDesc.end())
_remoteSvcDesc[msg->getMeta("desc:channel")] = shared_ptr<ServiceDescription>(new ServiceDescription(msg));
if (msg->getMeta("type").compare("serviceDiscFound") == 0) {
listener->added(_remoteSvcDesc[msg->getMeta("desc:channel")]);
} else {
listener->removed(_remoteSvcDesc[msg->getMeta("desc:channel")]);
_remoteSvcDesc.erase(msg->getMeta("desc:channel"));
}
}
delete keyFilter;
}
}
bool ServiceDescription::operator==(const ServiceDescription& cmp) const {
return (m_id == cmp.id());
}
