source: trunk/sources/thelib/src/protocols/protocolfactorymanager.cpp @ 734

/*
 *  Copyright (c) 2010,
 *  Gavriloaie Eugen-Andrei (shiretu@gmail.com)
 *
 *  This file is part of crtmpserver.
 *  crtmpserver is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  crtmpserver is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with crtmpserver.  If not, see <http://www.gnu.org/licenses/>.
 */




#include "protocols/protocolfactorymanager.h"
#include "protocols/baseprotocolfactory.h"
#include "protocols/baseprotocol.h"

map<uint32_t, BaseProtocolFactory *> ProtocolFactoryManager::_factoriesById;
map<uint64_t, BaseProtocolFactory *> ProtocolFactoryManager::_factoriesByProtocolId;
map<string, BaseProtocolFactory *> ProtocolFactoryManager::_factoriesByChainName;

bool ProtocolFactoryManager::RegisterProtocolFactory(BaseProtocolFactory *pFactory) {

        //1. Test to see if this factory is already registered
        if (MAP_HAS1(_factoriesById, pFactory->GetId())) {
                FATAL("Factory id %u already registered", pFactory->GetId());
                return false;
        }

        //2. Test to see if the protocol chains exported by this factory are already in use
        vector<string> protocolChains = pFactory->HandledProtocolChains();

        FOR_VECTOR(protocolChains, i) {
                if (MAP_HAS1(_factoriesByChainName, protocolChains[i])) {
                        FATAL("protocol chain %s already handled by factory %u",
                                        STR(protocolChains[i]),
                                        _factoriesByChainName[protocolChains[i]]->GetId());
                        return false;
                }
        }

        //3. Test to see if the protocols exported by this factory are already in use
        vector<uint64_t> protocols = pFactory->HandledProtocols();

        FOR_VECTOR(protocols, i) {
                if (MAP_HAS1(_factoriesByProtocolId, protocols[i])) {
                        FATAL("protocol %"PRIx64" already handled by factory %u", protocols[i],
                                        _factoriesByProtocolId[protocols[i]]->GetId());
                        return false;
                }
        }

        //4. Register everything

        FOR_VECTOR(protocolChains, i) {
                _factoriesByChainName[protocolChains[i]] = pFactory;
        }

        FOR_VECTOR(protocols, i) {
                _factoriesByProtocolId[protocols[i]] = pFactory;
        }

        _factoriesById[pFactory->GetId()] = pFactory;

        return true;
}

bool ProtocolFactoryManager::UnRegisterProtocolFactory(uint32_t factoryId) {
        if (!MAP_HAS1(_factoriesById, factoryId)) {
                WARN("Factory id not found: %u", factoryId);
                return true;
        }
        return UnRegisterProtocolFactory(_factoriesById[factoryId]);
}

bool ProtocolFactoryManager::UnRegisterProtocolFactory(BaseProtocolFactory *pFactory) {
        if (pFactory == NULL) {
                WARN("pFactory is NULL");
                return true;
        }

        if (!MAP_HAS1(_factoriesById, pFactory->GetId())) {
                WARN("Factory id not found: %u", pFactory->GetId());
                return true;
        }

        vector<string> protocolChains = pFactory->HandledProtocolChains();
        vector<uint64_t> protocols = pFactory->HandledProtocols();

        FOR_VECTOR(protocolChains, i) {
                _factoriesByChainName.erase(protocolChains[i]);
        }

        FOR_VECTOR(protocols, i) {
                _factoriesByProtocolId.erase(protocols[i]);
        }

        _factoriesById.erase(pFactory->GetId());

        return true;
}

vector<uint64_t> ProtocolFactoryManager::ResolveProtocolChain(string name) {
        if (!MAP_HAS1(_factoriesByChainName, name)) {
                FATAL("chain %s not registered by any protocol factory", STR(name));
                return vector<uint64_t > ();
        }

        return _factoriesByChainName[name]->ResolveProtocolChain(name);
}

BaseProtocol *ProtocolFactoryManager::CreateProtocolChain(string name,
                Variant &parameters) {
        vector<uint64_t> chain = ResolveProtocolChain(name);
        if (chain.size() == 0) {
                FATAL("Unable to create protocol chain");
                return NULL;
        }

        return CreateProtocolChain(chain, parameters);
}

BaseProtocol *ProtocolFactoryManager::CreateProtocolChain(vector<uint64_t> &chain,
                Variant &parameters) {
        BaseProtocol *pResult = NULL;

        //1. Check and see if all the protocols are handled by a factory

        FOR_VECTOR(chain, i) {
                if (!MAP_HAS1(_factoriesByProtocolId, chain[i])) {
                        FATAL("protocol %"PRIx64" not handled by anyone", chain[i]);
                        return NULL;
                }
        }

        //2. Spawn the protocols

        bool failed = false;

        FOR_VECTOR(chain, i) {
                BaseProtocol *pProtocol = _factoriesByProtocolId[chain[i]]->SpawnProtocol(
                                chain[i], parameters);
                if (pProtocol == NULL) {
                        FATAL("Unable to spawn protocol %s handled by factory %u",
                                        STR(tagToString(chain[i])),
                                        _factoriesByProtocolId[chain[i]]->GetId());
                        failed = true;
                        break;
                }
                if (pResult != NULL)
                        pResult->SetNearProtocol(pProtocol);

                pResult = pProtocol;
        }

        if (failed) {
                if (pResult != NULL)
                        delete pResult->GetFarEndpoint();
                pResult = NULL;
        } else {
                pResult = pResult->GetNearEndpoint();
        }

        return pResult;
}

string ProtocolFactoryManager::Dump() {
        string result = "Factories by id\n";

        FOR_MAP(_factoriesById, uint32_t, BaseProtocolFactory *, i) {
                result += format("\t%u\t%p\n", MAP_KEY(i), MAP_VAL(i));
        }

        result += "Factories by protocol id\n";

        FOR_MAP(_factoriesByProtocolId, uint64_t, BaseProtocolFactory *, i) {
                result += format("\t%s\t%p\n",
                                STR(tagToString(MAP_KEY(i))),
                                MAP_VAL(i));
        }

        result += "Factories by chain name\n";

        FOR_MAP(_factoriesByChainName, string, BaseProtocolFactory *, i) {
                result += format("\t%s\t%p\n",
                                STR(MAP_KEY(i)),
                                MAP_VAL(i));
        }

        return result;
}