570 lines
14 KiB
C++
570 lines
14 KiB
C++
/*
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* serverContext.cpp
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*/
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#include <pv/serverContext.h>
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#include <pv/responseHandlers.h>
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#include <epicsSignal.h>
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#include <logger.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 int32 ServerContextImpl::VERSION_MAJOR = 0;
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const int32 ServerContextImpl::VERSION_MINOR = 9;
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const int32 ServerContextImpl::VERSION_MAINTENANCE = 0;
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const int32 ServerContextImpl::VERSION_DEVELOPMENT = 0;
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const Version ServerContextImpl::VERSION("CA Server", "cpp",
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ServerContextImpl::VERSION_MAJOR,
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ServerContextImpl::VERSION_MINOR,
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ServerContextImpl::VERSION_MAINTENANCE,
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ServerContextImpl::VERSION_DEVELOPMENT);
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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(CA_BROADCAST_PORT),
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_serverPort(CA_SERVER_PORT),
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_receiveBufferSize(MAX_TCP_RECV),
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_timer(),
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_broadcastTransport(),
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_beaconEmitter(),
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_acceptor(),
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_transportRegistry(),
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_channelAccess(),
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_channelProviderNames(PVACCESS_DEFAULT_PROVIDER),
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_channelProviders(),
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_beaconServerStatusProvider()
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{
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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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initializeLogger();
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loadConfiguration();
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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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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 Version& ServerContextImpl::getVersion()
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{
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return ServerContextImpl::VERSION;
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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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struct noop_deleter
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{
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template<class T> void operator()(T * p)
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{
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}
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};
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Configuration::shared_pointer ServerContextImpl::getConfiguration()
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{
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ConfigurationProvider* configurationProvider = ConfigurationFactory::getProvider();
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Configuration* config = configurationProvider->getConfiguration("pvAccess-server");
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if (config == NULL)
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{
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config = configurationProvider->getConfiguration("system");
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}
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return Configuration::shared_pointer(config, noop_deleter());
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// TODO cache !!!
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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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_beaconAddressList = config->getPropertyAsString("EPICS4_CA_ADDR_LIST", _beaconAddressList);
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_beaconAddressList = config->getPropertyAsString("EPICS4_CAS_BEACON_ADDR_LIST", _beaconAddressList);
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_autoBeaconAddressList = config->getPropertyAsBoolean("EPICS4_CA_AUTO_ADDR_LIST", _autoBeaconAddressList);
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_autoBeaconAddressList = config->getPropertyAsBoolean("EPICS4_CAS_AUTO_BEACON_ADDR_LIST", _autoBeaconAddressList);
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_beaconPeriod = config->getPropertyAsFloat("EPICS4_CA_BEACON_PERIOD", _beaconPeriod);
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_beaconPeriod = config->getPropertyAsFloat("EPICS4_CAS_BEACON_PERIOD", _beaconPeriod);
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_serverPort = config->getPropertyAsInteger("EPICS4_CA_SERVER_PORT", _serverPort);
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_serverPort = config->getPropertyAsInteger("EPICS4_CAS_SERVER_PORT", _serverPort);
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_broadcastPort = config->getPropertyAsInteger("EPICS4_CA_BROADCAST_PORT", _broadcastPort);
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_broadcastPort = config->getPropertyAsInteger("EPICS4_CAS_BROADCAST_PORT", _broadcastPort);
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_receiveBufferSize = config->getPropertyAsInteger("EPICS4_CA_MAX_ARRAY_BYTES", _receiveBufferSize);
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_receiveBufferSize = config->getPropertyAsInteger("EPICS4_CAS_MAX_ARRAY_BYTES", _receiveBufferSize);
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_channelProviderNames = config->getPropertyAsString("EPICS4_CA_PROVIDER_NAMES", _channelProviderNames);
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_channelProviderNames = config->getPropertyAsString("EPICS4_CAS_PROVIDER_NAMES", _channelProviderNames);
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}
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void ServerContextImpl::initialize(ChannelAccess::shared_pointer const & channelAccess)
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{
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Lock guard(_mutex);
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if (channelAccess == NULL)
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{
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THROW_BASE_EXCEPTION("non null channelAccess expected");
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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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_channelAccess = channelAccess;
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// split comma 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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ChannelProvider::shared_pointer channelProvider = _channelAccess->getProvider(providerName);
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if (channelProvider)
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_channelProviders.push_back(channelProvider);
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}
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//_channelProvider = _channelAccess->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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std::auto_ptr<ResponseHandler> ServerContextImpl::createResponseHandler()
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{
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ServerContextImpl::shared_pointer thisContext = shared_from_this();
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return std::auto_ptr<ResponseHandler>(new ServerResponseHandler(thisContext));
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}
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void ServerContextImpl::internalInitialize()
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{
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_timer.reset(new Timer("pvAccess-server timer",lowerPriority));
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_transportRegistry.reset(new TransportRegistry());
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// setup broadcast UDP transport
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initializeBroadcastTransport();
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Context::shared_pointer thisContext = shared_from_this();
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ResponseHandlerFactory::shared_pointer thisFactory = shared_from_this();
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_acceptor.reset(new BlockingTCPAcceptor(thisContext, thisFactory, _serverPort, _receiveBufferSize));
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_serverPort = ntohs(_acceptor->getBindAddress()->ia.sin_port);
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ServerContextImpl::shared_pointer thisServerContext = shared_from_this();
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Transport::shared_pointer transport = _broadcastTransport;
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_beaconEmitter.reset(new BeaconEmitter(transport, thisServerContext));
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}
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void ServerContextImpl::initializeBroadcastTransport()
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{
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// setup UDP transport
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try
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{
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// where to bind (listen) address
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osiSockAddr listenLocalAddress;
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listenLocalAddress.ia.sin_family = AF_INET;
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listenLocalAddress.ia.sin_port = htons(_broadcastPort);
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listenLocalAddress.ia.sin_addr.s_addr = htonl(INADDR_ANY);
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// where to send addresses
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SOCKET socket = epicsSocketCreate(AF_INET, SOCK_STREAM, IPPROTO_TCP);
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if (socket == INVALID_SOCKET)
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{
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THROW_BASE_EXCEPTION("Failed to initialize broadcast UDP transport");
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}
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auto_ptr<InetAddrVector> broadcastAddresses(getBroadcastAddresses(socket,_broadcastPort));
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epicsSocketDestroy(socket);
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TransportClient::shared_pointer nullTransportClient;
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auto_ptr<BlockingUDPConnector> broadcastConnector(new BlockingUDPConnector(true, true));
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auto_ptr<epics::pvAccess::ResponseHandler> responseHandler = createResponseHandler();
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_broadcastTransport = static_pointer_cast<BlockingUDPTransport>(broadcastConnector->connect(
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nullTransportClient, responseHandler,
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listenLocalAddress, CA_MINOR_PROTOCOL_REVISION,
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CA_DEFAULT_PRIORITY));
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_broadcastTransport->setBroadcastAddresses(broadcastAddresses.get());
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// set ignore address list
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if (!_ignoreAddressList.empty())
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{
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// we do not care about the port
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auto_ptr<InetAddrVector> list(getSocketAddressList(_ignoreAddressList, 0, NULL));
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if (list.get() != NULL && list->size() > 0)
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{
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_broadcastTransport->setIgnoredAddresses(list.get());
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}
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}
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// set broadcast address list
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if (!_beaconAddressList.empty())
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{
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// if auto is true, add it to specified list
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InetAddrVector* appendList = NULL;
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if (_autoBeaconAddressList == true)
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{
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appendList = _broadcastTransport->getSendAddresses();
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}
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auto_ptr<InetAddrVector> list(getSocketAddressList(_beaconAddressList, _broadcastPort, appendList));
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if (list.get() != NULL && list->size() > 0)
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{
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_broadcastTransport->setBroadcastAddresses(list.get());
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}
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}
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_broadcastTransport->start();
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}
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catch (std::exception& e)
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{
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THROW_BASE_EXCEPTION_CAUSE("Failed to initialize broadcast UDP transport", e);
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}
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catch (...)
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{
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THROW_BASE_EXCEPTION("Failed to initialize broadcast UDP transport");
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}
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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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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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if (_broadcastTransport != NULL)
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{
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_broadcastTransport->close(true);
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_broadcastTransport.reset();
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}
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// stop accepting connections
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if (_acceptor != NULL)
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{
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_acceptor->destroy();
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_acceptor.reset();
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}
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// stop emitting beacons
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if (_beaconEmitter != NULL)
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{
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_beaconEmitter->destroy();
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_beaconEmitter.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 == NULL)
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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(true);
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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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<< "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(...)
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{
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// noop
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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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void ServerContextImpl::setServerPort(int32 port)
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{
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_serverPort = port;
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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 != NULL)
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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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ChannelAccess::shared_pointer ServerContextImpl::getChannelAccess()
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{
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return _channelAccess;
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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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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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{
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return _channelProviders;
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}
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Timer::shared_pointer ServerContextImpl::getTimer()
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{
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return _timer;
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}
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TransportRegistry::shared_pointer ServerContextImpl::getTransportRegistry()
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{
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return _transportRegistry;
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}
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Channel::shared_pointer ServerContextImpl::getChannel(pvAccessID id)
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{
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// not used
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return Channel::shared_pointer();
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}
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Transport::shared_pointer ServerContextImpl::getSearchTransport()
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{
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// not used
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return Transport::shared_pointer();
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}
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void ServerContextImpl::beaconAnomalyNotify()
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{
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// not used
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}
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}
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}
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