/* This work is licensed under a Creative Commons CCZero 1.0 Universal License. * See http://creativecommons.org/publicdomain/zero/1.0/ for more information. * * Copyright 2019 (c) basysKom GmbH (Author: Peter Rustler) */ #include #include #include #include #include #include #include #include #include static volatile UA_Boolean running = true; static void stopHandler(int sign) { (void)sign; UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "received ctrl-c"); running = false; } int main(void) { signal(SIGINT, stopHandler); signal(SIGTERM, stopHandler); UA_Server *server = UA_Server_new(); UA_ServerConfig *config = UA_Server_getConfig(server); UA_ServerConfig_setDefault(config); /* We need a gathering for the plugin to constuct. * The UA_HistoryDataGathering is responsible to collect data and store it to the database. * We will use this gathering for one node, only. initialNodeIdStoreSize = 1 * The store will grow if you register more than one node, but this is expensive. */ UA_HistoryDataGathering gathering = UA_HistoryDataGathering_Default(1); /* We set the responsible plugin in the configuration. UA_HistoryDatabase is * the main plugin which handles the historical data service. */ config->historyDatabase = UA_HistoryDatabase_default(gathering); /* Define the attribute of the uint32 variable node */ UA_VariableAttributes attr = UA_VariableAttributes_default; UA_UInt32 myUint32 = 40; UA_Variant_setScalar(&attr.value, &myUint32, &UA_TYPES[UA_TYPES_UINT32]); attr.description = UA_LOCALIZEDTEXT("en-US","myUintValue"); attr.displayName = UA_LOCALIZEDTEXT("en-US","myUintValue"); attr.dataType = UA_TYPES[UA_TYPES_UINT32].typeId; /* We set the access level to also support history read * This is what will be reported to clients */ attr.accessLevel = UA_ACCESSLEVELMASK_READ | UA_ACCESSLEVELMASK_WRITE | UA_ACCESSLEVELMASK_HISTORYREAD; /* We also set this node to historizing, so the server internals also know from it. */ attr.historizing = true; /* Add the variable node to the information model */ UA_NodeId uint32NodeId = UA_NODEID_STRING(1, "myUintValue"); UA_QualifiedName uint32Name = UA_QUALIFIEDNAME(1, "myUintValue"); UA_NodeId parentNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_OBJECTSFOLDER); UA_NodeId parentReferenceNodeId = UA_NODEID_NUMERIC(0, UA_NS0ID_ORGANIZES); UA_NodeId outNodeId; UA_NodeId_init(&outNodeId); UA_StatusCode retval = UA_Server_addVariableNode(server, uint32NodeId, parentNodeId, parentReferenceNodeId, uint32Name, UA_NODEID_NUMERIC(0, UA_NS0ID_BASEDATAVARIABLETYPE), attr, NULL, &outNodeId); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "UA_Server_addVariableNode %s", UA_StatusCode_name(retval)); /* Now we define the settings for our node */ UA_HistorizingNodeIdSettings setting; /* There is a memory based database plugin. We will use that. We just * reserve space for 3 nodes with 100 values each. This will also * automaticaly grow if needed, but that is expensive, because all data must * be copied. */ setting.historizingBackend = UA_HistoryDataBackend_Memory(3, 100); /* We want the server to serve a maximum of 100 values per request. This * value depend on the plattform you are running the server. A big server * can serve more values, smaller ones less. */ setting.maxHistoryDataResponseSize = 100; /* If we have a sensor which do not report updates * and need to be polled we change the setting like that. * The polling interval in ms. * setting.pollingInterval = 100; * * Set the update strategie to polling. * setting.historizingUpdateStrategy = UA_HISTORIZINGUPDATESTRATEGY_POLL; */ /* If you want to insert the values to the database yourself, we can set the user strategy here. * This is useful if you for example want a value stored, if a defined delta is reached. * Then you should use a local monitored item with a fuzziness and store the value in the callback. * setting.historizingUpdateStrategy = UA_HISTORIZINGUPDATESTRATEGY_USER; */ /* We want the values stored in the database, when the nodes value is * set. */ setting.historizingUpdateStrategy = UA_HISTORIZINGUPDATESTRATEGY_VALUESET; /* At the end we register the node for gathering data in the database. */ retval = gathering.registerNodeId(server, gathering.context, &outNodeId, setting); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "registerNodeId %s", UA_StatusCode_name(retval)); /* If you use UA_HISTORIZINGUPDATESTRATEGY_POLL, then start the polling. * retval = gathering.startPoll(server, gathering.context, &outNodeId); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "startPoll %s", UA_StatusCode_name(retval)); */ retval = UA_Server_run(server, &running); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "UA_Server_run %s", UA_StatusCode_name(retval)); /* * If you use UA_HISTORIZINGUPDATESTRATEGY_POLL, then stop the polling. * retval = gathering.stopPoll(server, gathering.context, &outNodeId); UA_LOG_INFO(UA_Log_Stdout, UA_LOGCATEGORY_SERVER, "stopPoll %s", UA_StatusCode_name(retval)); */ UA_Server_delete(server); UA_NodeId_clear(&outNodeId); setting.historizingBackend.deleteMembers(&setting.historizingBackend); return retval == UA_STATUSCODE_GOOD ? EXIT_SUCCESS : EXIT_FAILURE; }