671 lines
17 KiB
C++
671 lines
17 KiB
C++
/**
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* Copyright - See the COPYRIGHT that is included with this distribution.
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* pvAccessCPP is distributed subject to a Software License Agreement found
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* in file LICENSE that is included with this distribution.
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*/
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#include <epicsSignal.h>
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#define epicsExportSharedSymbols
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#include <pv/responseHandlers.h>
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#include <pv/logger.h>
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#include <pv/serverContext.h>
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#include <pv/security.h>
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using namespace std;
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using namespace epics::pvData;
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using std::tr1::dynamic_pointer_cast;
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using std::tr1::static_pointer_cast;
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namespace epics { namespace pvAccess {
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const char* ServerContextImpl::StateNames[] = { "NOT_INITIALIZED", "INITIALIZED", "RUNNING", "SHUTDOWN", "DESTROYED"};
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const Version ServerContextImpl::VERSION("pvAccess Server", "cpp",
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EPICS_PVA_MAJOR_VERSION, EPICS_PVA_MINOR_VERSION, EPICS_PVA_MAINTENANCE_VERSION, EPICS_PVA_DEVELOPMENT_FLAG);
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ServerContextImpl::ServerContextImpl():
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_state(NOT_INITIALIZED),
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_beaconAddressList(),
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_ignoreAddressList(),
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_autoBeaconAddressList(true),
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_beaconPeriod(15.0),
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_broadcastPort(PVA_BROADCAST_PORT),
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_serverPort(PVA_SERVER_PORT),
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_receiveBufferSize(MAX_TCP_RECV),
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_timer(),
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_beaconEmitter(),
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_acceptor(),
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_transportRegistry(),
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_channelProviderRegistry(),
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_channelProviderNames(PVACCESS_DEFAULT_PROVIDER),
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_channelProviders(),
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_beaconServerStatusProvider(),
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_startTime()
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{
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epicsTimeGetCurrent(&_startTime);
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// TODO maybe there is a better place for this (when there will be some factory)
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epicsSignalInstallSigAlarmIgnore ();
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epicsSignalInstallSigPipeIgnore ();
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generateGUID();
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initializeLogger();
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}
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ServerContextImpl::shared_pointer ServerContextImpl::create()
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{
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ServerContextImpl::shared_pointer thisPointer(new ServerContextImpl());
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thisPointer->loadConfiguration();
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return thisPointer;
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}
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ServerContextImpl::shared_pointer ServerContextImpl::create(
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const Configuration::shared_pointer& conf)
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{
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ServerContextImpl::shared_pointer thisPointer(new ServerContextImpl());
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thisPointer->configuration = conf;
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thisPointer->loadConfiguration();
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return thisPointer;
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}
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ServerContextImpl::~ServerContextImpl()
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{
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dispose();
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}
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const GUID& ServerContextImpl::getGUID()
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{
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return _guid;
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}
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const Version& ServerContextImpl::getVersion()
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{
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return ServerContextImpl::VERSION;
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}
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/*
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#ifdef WIN32
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UUID uuid;
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UuidCreate ( &uuid );
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#else
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uuid_t uuid;
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uuid_generate_random ( uuid );
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#endif
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*/
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void ServerContextImpl::generateGUID()
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{
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// TODO use UUID
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epics::pvData::TimeStamp startupTime;
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startupTime.getCurrent();
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ByteBuffer buffer(_guid.value, sizeof(_guid.value));
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buffer.putLong(startupTime.getSecondsPastEpoch());
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buffer.putInt(startupTime.getNanoseconds());
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}
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void ServerContextImpl::initializeLogger()
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{
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//createFileLogger("serverContextImpl.log");
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}
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Configuration::shared_pointer ServerContextImpl::getConfiguration()
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{
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Lock guard(_mutex);
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if (configuration.get() == 0)
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{
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ConfigurationProvider::shared_pointer configurationProvider = ConfigurationFactory::getProvider();
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configuration = configurationProvider->getConfiguration("pvAccess-server");
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if (configuration.get() == 0)
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{
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configuration = configurationProvider->getConfiguration("system");
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}
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}
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return configuration;
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}
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/**
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* Load configuration.
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*/
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void ServerContextImpl::loadConfiguration()
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{
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Configuration::shared_pointer config = getConfiguration();
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// TODO for now just a simple switch
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int32 debugLevel = config->getPropertyAsInteger(PVACCESS_DEBUG, 0);
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if (debugLevel > 0)
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SET_LOG_LEVEL(logLevelDebug);
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// TODO multiple addresses
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_ifaceAddr.ia.sin_family = AF_INET;
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_ifaceAddr.ia.sin_addr.s_addr = htonl(INADDR_ANY);
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_ifaceAddr.ia.sin_port = 0;
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config->getPropertyAsAddress("EPICS_PVAS_INTF_ADDR_LIST", &_ifaceAddr);
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_beaconAddressList = config->getPropertyAsString("EPICS_PVA_ADDR_LIST", _beaconAddressList);
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_beaconAddressList = config->getPropertyAsString("EPICS_PVAS_BEACON_ADDR_LIST", _beaconAddressList);
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_autoBeaconAddressList = config->getPropertyAsBoolean("EPICS_PVA_AUTO_ADDR_LIST", _autoBeaconAddressList);
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_autoBeaconAddressList = config->getPropertyAsBoolean("EPICS_PVAS_AUTO_BEACON_ADDR_LIST", _autoBeaconAddressList);
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_beaconPeriod = config->getPropertyAsFloat("EPICS_PVA_BEACON_PERIOD", _beaconPeriod);
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_beaconPeriod = config->getPropertyAsFloat("EPICS_PVAS_BEACON_PERIOD", _beaconPeriod);
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_serverPort = config->getPropertyAsInteger("EPICS_PVA_SERVER_PORT", _serverPort);
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_serverPort = config->getPropertyAsInteger("EPICS_PVAS_SERVER_PORT", _serverPort);
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_ifaceAddr.ia.sin_port = htons(_serverPort);
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_broadcastPort = config->getPropertyAsInteger("EPICS_PVA_BROADCAST_PORT", _broadcastPort);
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_broadcastPort = config->getPropertyAsInteger("EPICS_PVAS_BROADCAST_PORT", _broadcastPort);
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_receiveBufferSize = config->getPropertyAsInteger("EPICS_PVA_MAX_ARRAY_BYTES", _receiveBufferSize);
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_receiveBufferSize = config->getPropertyAsInteger("EPICS_PVAS_MAX_ARRAY_BYTES", _receiveBufferSize);
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_channelProviderNames = config->getPropertyAsString("EPICS_PVA_PROVIDER_NAMES", _channelProviderNames);
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_channelProviderNames = config->getPropertyAsString("EPICS_PVAS_PROVIDER_NAMES", _channelProviderNames);
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//
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// introspect network interfaces
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//
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SOCKET sock = epicsSocketCreate(AF_INET, SOCK_STREAM, 0);
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if (!sock) {
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THROW_BASE_EXCEPTION("Failed to create a socket needed to introspect network interfaces.");
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}
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if (discoverInterfaces(_ifaceList, sock, &_ifaceAddr))
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{
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THROW_BASE_EXCEPTION("Failed to introspect network interfaces.");
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}
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else if (_ifaceList.size() == 0)
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{
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THROW_BASE_EXCEPTION("No (specified) network interface(s) available.");
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}
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epicsSocketDestroy(sock);
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}
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bool ServerContextImpl::isChannelProviderNamePreconfigured()
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{
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Configuration::shared_pointer config = getConfiguration();
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return config->hasProperty("EPICS_PVA_PROVIDER_NAMES") || config->hasProperty("EPICS_PVAS_PROVIDER_NAMES");
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}
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void ServerContextImpl::initialize(ChannelProviderRegistry::shared_pointer const & channelProviderRegistry)
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{
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Lock guard(_mutex);
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if (!channelProviderRegistry.get())
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{
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THROW_BASE_EXCEPTION("channelProviderRegistry == NULL");
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}
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if (_state == DESTROYED)
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{
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THROW_BASE_EXCEPTION("Context destroyed.");
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}
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else if (_state != NOT_INITIALIZED)
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{
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THROW_BASE_EXCEPTION("Context already initialized.");
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}
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_channelProviderRegistry = channelProviderRegistry;
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// user all providers
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if (_channelProviderNames == PVACCESS_ALL_PROVIDERS)
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{
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_channelProviderNames.resize(0); // VxWorks 5.5 omits clear()
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std::auto_ptr<ChannelProviderRegistry::stringVector_t> names = _channelProviderRegistry->getProviderNames();
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for (ChannelProviderRegistry::stringVector_t::iterator iter = names->begin(); iter != names->end(); iter++)
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{
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ChannelProvider::shared_pointer channelProvider = _channelProviderRegistry->getProvider(*iter);
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if (channelProvider)
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{
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_channelProviders.push_back(channelProvider);
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// compile a list
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if (!_channelProviderNames.empty())
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_channelProviderNames += ' ';
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_channelProviderNames += *iter;
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}
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}
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}
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else
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{
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// split space separated names
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std::stringstream ss(_channelProviderNames);
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std::string providerName;
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while (std::getline(ss, providerName, ' '))
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{
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ChannelProvider::shared_pointer channelProvider = _channelProviderRegistry->getProvider(providerName);
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if (channelProvider)
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_channelProviders.push_back(channelProvider);
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}
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}
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//_channelProvider = _channelProviderRegistry->getProvider(_channelProviderNames);
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if (_channelProviders.size() == 0)
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{
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std::string msg = "None of the specified channel providers are available: " + _channelProviderNames + ".";
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THROW_BASE_EXCEPTION(msg.c_str());
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}
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internalInitialize();
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_state = INITIALIZED;
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}
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void ServerContextImpl::internalInitialize()
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{
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osiSockAttach();
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_timer.reset(new Timer("pvAccess-server timer", lowerPriority));
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_transportRegistry.reset(new TransportRegistry());
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ServerContextImpl::shared_pointer thisServerContext = shared_from_this();
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_responseHandler.reset(new ServerResponseHandler(thisServerContext));
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_acceptor.reset(new BlockingTCPAcceptor(thisServerContext, _responseHandler, _ifaceAddr, _receiveBufferSize));
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_serverPort = ntohs(_acceptor->getBindAddress()->ia.sin_port);
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// setup broadcast UDP transport
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initializeBroadcastTransport();
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// TODO introduce "tcp" a constant
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_beaconEmitter.reset(new BeaconEmitter("tcp", _broadcastTransport, thisServerContext));
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}
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void ServerContextImpl::initializeBroadcastTransport()
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{
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initializeUDPTransports(true, _udpTransports, _ifaceList, _responseHandler, _broadcastTransport,
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_broadcastPort, _autoBeaconAddressList, _beaconAddressList, _ignoreAddressList);
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}
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void ServerContextImpl::run(int32 seconds)
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{
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if (seconds < 0)
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{
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THROW_BASE_EXCEPTION("seconds cannot be negative.");
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}
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{
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Lock guard(_mutex);
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if (_state == NOT_INITIALIZED)
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{
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THROW_BASE_EXCEPTION("Context not initialized.");
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}
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else if (_state == DESTROYED)
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{
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THROW_BASE_EXCEPTION("Context destroyed.");
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}
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else if (_state == RUNNING)
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{
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THROW_BASE_EXCEPTION("Context is already running.");
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}
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else if (_state == SHUTDOWN)
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{
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THROW_BASE_EXCEPTION("Context was shutdown.");
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}
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_state = RUNNING;
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}
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// run...
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_beaconEmitter->start();
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//TODO review this
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if(seconds == 0)
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{
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_runEvent.wait();
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}
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else
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{
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_runEvent.wait(seconds);
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}
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{
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Lock guard(_mutex);
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_state = SHUTDOWN;
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}
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}
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void ServerContextImpl::shutdown()
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{
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Lock guard(_mutex);
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if(_state == DESTROYED)
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{
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THROW_BASE_EXCEPTION("Context already destroyed.");
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}
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// notify to stop running...
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_runEvent.signal();
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}
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void ServerContextImpl::destroy()
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{
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Lock guard(_mutex);
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if (_state == DESTROYED)
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{
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// silent return
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return;
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// exception is not OK, since we use
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// shared_pointer-s auto-cleanup/destruction
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// THROW_BASE_EXCEPTION("Context already destroyed.");
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}
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// shutdown if not already
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shutdown();
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// go into destroyed state ASAP
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_state = DESTROYED;
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internalDestroy();
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}
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void ServerContextImpl::internalDestroy()
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{
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// stop responding to search requests
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for (BlockingUDPTransportVector::const_iterator iter = _udpTransports.begin();
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iter != _udpTransports.end(); iter++)
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(*iter)->close();
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_udpTransports.clear();
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// stop emitting beacons
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if (_beaconEmitter)
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{
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_beaconEmitter->destroy();
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_beaconEmitter.reset();
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}
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// close UDP sent transport
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if (_broadcastTransport)
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{
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_broadcastTransport->close();
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_broadcastTransport.reset();
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}
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// stop accepting connections
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if (_acceptor)
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{
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_acceptor->destroy();
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_acceptor.reset();
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}
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// this will also destroy all channels
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destroyAllTransports();
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}
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void ServerContextImpl::destroyAllTransports()
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{
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// not initialized yet
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if (!_transportRegistry.get())
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{
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return;
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}
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std::auto_ptr<TransportRegistry::transportVector_t> transports = _transportRegistry->toArray();
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if (transports.get() == 0)
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return;
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int size = (int)transports->size();
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if (size == 0)
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return;
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LOG(logLevelInfo, "Server context still has %d transport(s) active and closing...", size);
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for (int i = 0; i < size; i++)
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{
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Transport::shared_pointer transport = (*transports)[i];
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try
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{
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transport->close();
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}
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catch (std::exception &e)
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{
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// do all exception safe, log in case of an error
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LOG(logLevelError, "Unhandled exception caught from client code at %s:%d: %s", __FILE__, __LINE__, e.what());
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}
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catch (...)
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{
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// do all exception safe, log in case of an error
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LOG(logLevelError, "Unhandled exception caught from client code at %s:%d.", __FILE__, __LINE__);
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}
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}
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// now clear all (release)
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_transportRegistry->clear();
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}
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void ServerContextImpl::printInfo()
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{
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printInfo(cout);
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}
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void ServerContextImpl::printInfo(ostream& str)
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{
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Lock guard(_mutex);
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str << "VERSION : " << getVersion().getVersionString() << endl \
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<< "PROVIDER_NAMES : " << _channelProviderNames << endl \
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<< "BEACON_ADDR_LIST : " << _beaconAddressList << endl \
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<< "AUTO_BEACON_ADDR_LIST : " << _autoBeaconAddressList << endl \
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<< "BEACON_PERIOD : " << _beaconPeriod << endl \
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<< "BROADCAST_PORT : " << _broadcastPort << endl \
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<< "SERVER_PORT : " << _serverPort << endl \
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<< "RCV_BUFFER_SIZE : " << _receiveBufferSize << endl \
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<< "IGNORE_ADDR_LIST: " << _ignoreAddressList << endl \
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<< "INTF_ADDR_LIST : " << inetAddressToString(_ifaceAddr, false) << endl \
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<< "STATE : " << ServerContextImpl::StateNames[_state] << endl;
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}
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void ServerContextImpl::dispose()
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{
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try
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{
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destroy();
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}
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catch(std::exception& e)
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{
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std::cerr<<"Error in: ServerContextImpl::dispose: "<<e.what()<<"\n";
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}
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catch(...)
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{
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std::cerr<<"Oh no, something when wrong in ServerContextImpl::dispose!\n";
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}
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}
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void ServerContextImpl::setBeaconServerStatusProvider(BeaconServerStatusProvider::shared_pointer const & beaconServerStatusProvider)
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{
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_beaconServerStatusProvider = beaconServerStatusProvider;
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}
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bool ServerContextImpl::isInitialized()
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{
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Lock guard(_mutex);
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return _state == INITIALIZED || _state == RUNNING || _state == SHUTDOWN;
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}
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bool ServerContextImpl::isDestroyed()
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{
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Lock guard(_mutex);
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return _state == DESTROYED;
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}
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std::string ServerContextImpl::getBeaconAddressList()
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{
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return _beaconAddressList;
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}
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bool ServerContextImpl::isAutoBeaconAddressList()
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{
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return _autoBeaconAddressList;
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}
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float ServerContextImpl::getBeaconPeriod()
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{
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return _beaconPeriod;
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}
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int32 ServerContextImpl::getReceiveBufferSize()
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{
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return _receiveBufferSize;
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}
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int32 ServerContextImpl::getServerPort()
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{
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return _serverPort;
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}
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int32 ServerContextImpl::getBroadcastPort()
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{
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return _broadcastPort;
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}
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std::string ServerContextImpl::getIgnoreAddressList()
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{
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return _ignoreAddressList;
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}
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BeaconServerStatusProvider::shared_pointer ServerContextImpl::getBeaconServerStatusProvider()
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{
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return _beaconServerStatusProvider;
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}
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osiSockAddr* ServerContextImpl::getServerInetAddress()
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{
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if(_acceptor.get())
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{
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return const_cast<osiSockAddr*>(_acceptor->getBindAddress());
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}
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return NULL;
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}
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BlockingUDPTransport::shared_pointer ServerContextImpl::getBroadcastTransport()
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{
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return _broadcastTransport;
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}
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ChannelProviderRegistry::shared_pointer ServerContextImpl::getChannelProviderRegistry()
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{
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return _channelProviderRegistry;
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}
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std::string ServerContextImpl::getChannelProviderName()
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{
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return _channelProviderNames;
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}
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// NOTE: not synced
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void ServerContextImpl::setChannelProviderName(std::string channelProviderName)
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{
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if (_state != NOT_INITIALIZED)
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throw std::logic_error("must be called before initialize");
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_channelProviderNames = channelProviderName;
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}
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std::vector<ChannelProvider::shared_pointer>& ServerContextImpl::getChannelProviders()
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{
|
|
return _channelProviders;
|
|
}
|
|
|
|
Timer::shared_pointer ServerContextImpl::getTimer()
|
|
{
|
|
return _timer;
|
|
}
|
|
|
|
TransportRegistry::shared_pointer ServerContextImpl::getTransportRegistry()
|
|
{
|
|
return _transportRegistry;
|
|
}
|
|
|
|
Channel::shared_pointer ServerContextImpl::getChannel(pvAccessID /*id*/)
|
|
{
|
|
// not used
|
|
return Channel::shared_pointer();
|
|
}
|
|
|
|
Transport::shared_pointer ServerContextImpl::getSearchTransport()
|
|
{
|
|
// not used
|
|
return Transport::shared_pointer();
|
|
}
|
|
|
|
void ServerContextImpl::newServerDetected()
|
|
{
|
|
// not used
|
|
}
|
|
|
|
epicsTimeStamp& ServerContextImpl::getStartTime()
|
|
{
|
|
return _startTime;
|
|
}
|
|
|
|
|
|
std::map<std::string, std::tr1::shared_ptr<SecurityPlugin> >& ServerContextImpl::getSecurityPlugins()
|
|
{
|
|
return SecurityPluginRegistry::instance().getServerSecurityPlugins();
|
|
}
|
|
|
|
|
|
|
|
struct ThreadRunnerParam {
|
|
ServerContextImpl::shared_pointer ctx;
|
|
int timeToRun;
|
|
};
|
|
|
|
static void threadRunner(void* usr)
|
|
{
|
|
ThreadRunnerParam* pusr = static_cast<ThreadRunnerParam*>(usr);
|
|
ThreadRunnerParam param = *pusr;
|
|
delete pusr;
|
|
|
|
param.ctx->run(param.timeToRun);
|
|
}
|
|
|
|
|
|
|
|
ServerContext::shared_pointer startPVAServer(std::string const & providerNames, int timeToRun, bool runInSeparateThread, bool printInfo)
|
|
{
|
|
ServerContextImpl::shared_pointer ctx = ServerContextImpl::create();
|
|
|
|
// do not override configuration
|
|
if (!ctx->isChannelProviderNamePreconfigured())
|
|
ctx->setChannelProviderName(providerNames);
|
|
|
|
ChannelProviderRegistry::shared_pointer channelProviderRegistry = getChannelProviderRegistry();
|
|
ctx->initialize(channelProviderRegistry);
|
|
|
|
if (printInfo)
|
|
ctx->printInfo();
|
|
|
|
|
|
if (runInSeparateThread)
|
|
{
|
|
// delete left to the thread
|
|
auto_ptr<ThreadRunnerParam> param(new ThreadRunnerParam());
|
|
param->ctx = ctx;
|
|
param->timeToRun = timeToRun;
|
|
|
|
// TODO can this fail?
|
|
epicsThreadCreate("startPVAServer",
|
|
epicsThreadPriorityMedium,
|
|
epicsThreadGetStackSize(epicsThreadStackBig),
|
|
threadRunner, param.get());
|
|
|
|
param.release();
|
|
}
|
|
else
|
|
{
|
|
ctx->run(timeToRun);
|
|
}
|
|
|
|
return ctx;
|
|
}
|
|
|
|
}
|
|
}
|