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Add deflect::Observer which can be used only receive events w/o the n…
…eed so send images
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| /*********************************************************************/ | ||
| /* Copyright (c) 2013-2017, EPFL/Blue Brain Project */ | ||
| /* Raphael Dumusc <raphael.dumusc@epfl.ch> */ | ||
| /* Stefan.Eilemann@epfl.ch */ | ||
| /* Daniel.Nachbaur@epfl.ch */ | ||
| /* All rights reserved. */ | ||
| /* */ | ||
| /* Redistribution and use in source and binary forms, with or */ | ||
| /* without modification, are permitted provided that the following */ | ||
| /* conditions are met: */ | ||
| /* */ | ||
| /* 1. Redistributions of source code must retain the above */ | ||
| /* copyright notice, this list of conditions and the following */ | ||
| /* disclaimer. */ | ||
| /* */ | ||
| /* 2. Redistributions in binary form must reproduce the above */ | ||
| /* copyright notice, this list of conditions and the following */ | ||
| /* disclaimer in the documentation and/or other materials */ | ||
| /* provided with the distribution. */ | ||
| /* */ | ||
| /* THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY OF TEXAS AT */ | ||
| /* AUSTIN ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, */ | ||
| /* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF */ | ||
| /* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */ | ||
| /* DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OF TEXAS AT */ | ||
| /* AUSTIN OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, */ | ||
| /* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */ | ||
| /* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE */ | ||
| /* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR */ | ||
| /* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF */ | ||
| /* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */ | ||
| /* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT */ | ||
| /* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE */ | ||
| /* POSSIBILITY OF SUCH DAMAGE. */ | ||
| /* */ | ||
| /* The views and conclusions contained in the software and */ | ||
| /* documentation are those of the authors and should not be */ | ||
| /* interpreted as representing official policies, either expressed */ | ||
| /* or implied, of The University of Texas at Austin. */ | ||
| /*********************************************************************/ | ||
|
|
||
| #include "Observer.h" | ||
| #include "StreamPrivate.h" | ||
|
|
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| #include <QDataStream> | ||
|
|
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| #include <cassert> | ||
| #include <iostream> | ||
|
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| namespace deflect | ||
| { | ||
| Observer::Observer() | ||
| : _impl(new StreamPrivate("", "", Socket::defaultPortNumber, true)) | ||
| { | ||
| } | ||
|
|
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| Observer::Observer(const std::string& id, const std::string& host, | ||
| const unsigned short port) | ||
| : _impl(new StreamPrivate(id, host, port, true)) | ||
| { | ||
| } | ||
|
|
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| Observer::Observer(StreamPrivate* impl) | ||
| : _impl(impl) | ||
| { | ||
| } | ||
|
|
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| Observer::~Observer() | ||
| { | ||
| } | ||
|
|
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| bool Observer::isConnected() const | ||
| { | ||
| return _impl->socket.isConnected(); | ||
| } | ||
|
|
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| const std::string& Observer::getId() const | ||
| { | ||
| return _impl->id; | ||
| } | ||
|
|
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| const std::string& Observer::getHost() const | ||
| { | ||
| return _impl->socket.getHost(); | ||
| } | ||
|
|
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| bool Observer::registerForEvents(const bool exclusive) | ||
| { | ||
| if (!isConnected()) | ||
| { | ||
| std::cerr << "deflect::Stream::registerForEvents: Stream is not " | ||
| << "connected, operation failed" << std::endl; | ||
| return false; | ||
| } | ||
|
|
||
| if (isRegisteredForEvents()) | ||
| return true; | ||
|
|
||
| // Send the bind message | ||
| if (!_impl->sendWorker.enqueueBindRequest(exclusive).get()) | ||
| { | ||
| std::cerr << "deflect::Stream::registerForEvents: sending bind message " | ||
| << "failed" << std::endl; | ||
| return false; | ||
| } | ||
|
|
||
| // Wait for bind reply | ||
| MessageHeader mh; | ||
| QByteArray message; | ||
| if (!_impl->socket.receive(mh, message)) | ||
| { | ||
| std::cerr << "deflect::Stream::registerForEvents: receive bind reply " | ||
| << "failed" << std::endl; | ||
| return false; | ||
| } | ||
| if (mh.type != MESSAGE_TYPE_BIND_EVENTS_REPLY) | ||
| { | ||
| std::cerr << "deflect::Stream::registerForEvents: received unexpected " | ||
| << "message type (" << int(mh.type) << ")" << std::endl; | ||
| return false; | ||
| } | ||
| _impl->registeredForEvents = *(bool*)(message.data()); | ||
|
|
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| return isRegisteredForEvents(); | ||
| } | ||
|
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| bool Observer::isRegisteredForEvents() const | ||
| { | ||
| return _impl->registeredForEvents; | ||
| } | ||
|
|
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| int Observer::getDescriptor() const | ||
| { | ||
| return _impl->socket.getFileDescriptor(); | ||
| } | ||
|
|
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| bool Observer::hasEvent() const | ||
| { | ||
| return _impl->socket.hasMessage(Event::serializedSize); | ||
| } | ||
|
|
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| Event Observer::getEvent() | ||
| { | ||
| MessageHeader mh; | ||
| QByteArray message; | ||
| if (!_impl->socket.receive(mh, message)) | ||
| { | ||
| std::cerr << "deflect::Stream::getEvent: receive failed" << std::endl; | ||
| return Event(); | ||
| } | ||
| if (mh.type != MESSAGE_TYPE_EVENT) | ||
| { | ||
| std::cerr << "deflect::Stream::getEvent: received unexpected message " | ||
| << "type (" << int(mh.type) << ")" << std::endl; | ||
| return Event(); | ||
| } | ||
|
|
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| assert((size_t)message.size() == Event::serializedSize); | ||
|
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| Event event; | ||
| { | ||
| QDataStream stream(message); | ||
| stream >> event; | ||
| } | ||
| return event; | ||
| } | ||
|
|
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| void Observer::setDisconnectedCallback(const std::function<void()> callback) | ||
| { | ||
| _impl->disconnectedCallback = callback; | ||
| } | ||
| } |
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