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/***************************************************************************** |
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* |
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* $Id$ |
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* |
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* Copyright 2010 Richard Hacker (lerichi at gmx dot net) |
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* |
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* This file is part of the pdserv library. |
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* |
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* The pdserv library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published |
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* by the Free Software Foundation, either version 3 of the License, or (at |
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* your option) any later version. |
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* |
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* The pdserv library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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* License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with the pdserv library. If not, see <http://www.gnu.org/licenses/>. |
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* |
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*****************************************************************************/ |
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#include "../Debug.h" |
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#include "../Main.h" |
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#include "../Signal.h" |
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#include "../Task.h" |
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#include "../TaskStatistics.h" |
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#include "SubscriptionManager.h" |
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#include "Channel.h" |
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#include "Session.h" |
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#include "Subscription.h" |
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#include "XmlElement.h" |
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#include <algorithm> |
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#include <queue> |
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using namespace MsrProto; |
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///////////////////////////////////////////////////////////////////////////// |
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struct timespec SubscriptionManager::dummyTime; |
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PdServ::TaskStatistics SubscriptionManager::dummyTaskStatistics; |
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///////////////////////////////////////////////////////////////////////////// |
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SubscriptionManager::SubscriptionManager( |
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const Session *s, const PdServ::Task* task): |
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SessionTask(task), session(s) |
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{ |
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taskTime = &dummyTime; |
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taskStatistics = &dummyTaskStatistics; |
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unsubscribedCount = 0; |
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subscribedCount = 0; |
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doSync = false; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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SubscriptionManager::~SubscriptionManager() |
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{ |
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clear(); |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::subscribe (const Channel *c, |
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bool event, unsigned int decimation, |
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size_t blocksize, bool base64, size_t precision) |
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{ |
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remove(signalSubscriptionMap[c->signal][c]); |
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Subscription *subscription = |
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new Subscription(c, event, decimation, blocksize, base64, precision); |
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signalSubscriptionMap[c->signal][c] = subscription; |
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DecimationTuple& dt = activeSignals[subscription->decimation]; |
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if (!dt.first) |
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dt.first = 1; |
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++unsubscribedCount; |
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c->signal->subscribe(this); |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::clear() |
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{ |
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SignalSubscriptionMap::const_iterator it; |
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for (it = signalSubscriptionMap.begin(); |
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it != signalSubscriptionMap.end(); ++it) { |
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it->first->unsubscribe(this); |
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for (ChannelSubscriptionMap::const_iterator it2 = it->second.begin(); |
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it2 != it->second.end(); ++it2) |
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delete it2->second; |
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} |
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signalSubscriptionMap.clear(); |
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activeSignals.clear(); |
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subscribedCount = 0; |
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unsubscribedCount = 0; |
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doSync = 0; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::remove (Subscription *s) |
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{ |
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if (!s) |
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return; |
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DecimationGroup::iterator it = activeSignals.find(s->decimation); |
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if (it != activeSignals.end()) { |
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SubscriptionSet::iterator it2 = it->second.second.find(s); |
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if (it2 != it->second.second.end()) { |
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it->second.second.erase(s); |
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if (it->second.second.empty()) |
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activeSignals.erase(it); |
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--subscribedCount; |
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} |
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else |
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--unsubscribedCount; |
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} |
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delete s; |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::unsubscribe(const Channel *c) |
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{ |
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// cout << __func__ << c->path() << endl; |
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SignalSubscriptionMap::iterator it = signalSubscriptionMap.find(c->signal); |
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if (it == signalSubscriptionMap.end()) |
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return; |
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ChannelSubscriptionMap::iterator it2 = it->second.find(c); |
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if (it2 == it->second.end()) |
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return; |
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remove(it2->second); |
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it->second.erase(it2); |
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if (it->second.empty()) { |
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it->first->unsubscribe(this); |
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signalSubscriptionMap.erase(it); |
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} |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::newSignal( const PdServ::Signal *s) |
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{ |
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if (!unsubscribedCount) |
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return; |
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SignalSubscriptionMap::const_iterator sit = signalSubscriptionMap.find(s); |
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// Find out whether this signal is used or whether it is active already |
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if (sit == signalSubscriptionMap.end()) |
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return; |
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for (ChannelSubscriptionMap::const_iterator it2 = sit->second.begin(); |
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it2 != sit->second.end(); ++it2) { |
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Subscription *s = it2->second; |
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DecimationTuple& dt = activeSignals[s->decimation]; |
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SubscriptionSet::iterator it3 = dt.second.find(s); |
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if (it3 == dt.second.end()) { |
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dt.second.insert(s); |
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doSync = !--unsubscribedCount; |
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} |
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} |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::rxPdo(Session::TCPStream& tcp, bool quiet) |
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{ |
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typedef std::queue<Subscription*> PrintQ; |
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PrintQ printQ; |
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DecimationGroup::iterator it; |
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SubscriptionSet::const_iterator it2, it2_end; |
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while (task->rxPdo(this, &taskTime, &taskStatistics)) { |
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if (quiet) |
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continue; |
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for (it = activeSignals.begin(); it != activeSignals.end(); ++it) { |
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DecimationTuple& dt = it->second; |
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if (--dt.first) |
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continue; |
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dt.first = it->first; |
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it2_end = dt.second.end(); |
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for (it2 = dt.second.begin(); it2 != it2_end; ++it2) { |
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const char *data = (*it2)->channel->signal->getValue(this); |
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if ((*it2)->newValue(data) or (doSync and !(*it2)->event)) |
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printQ.push(*it2); |
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} |
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} |
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doSync = false; |
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if (!printQ.empty()) { |
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XmlElement dataTag(tcp.createElement("data")); |
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XmlElement::Attribute(dataTag, "level") << 0; |
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XmlElement::Attribute(dataTag, "time") << *taskTime; |
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while (!printQ.empty()) { |
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printQ.front()->print(dataTag); |
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printQ.pop(); |
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} |
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} |
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} |
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} |
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///////////////////////////////////////////////////////////////////////////// |
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void SubscriptionManager::sync() |
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{ |
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doSync = !unsubscribedCount; |
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for (DecimationGroup::iterator it = activeSignals.begin(); |
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it != activeSignals.end(); ++it) |
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it->second.first = 1; |
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} |
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