client_context.hpp

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#pragma once
 
#include <array>
#include <atomic>
#include <cstdint>
#include <functional>
#include <memory>
#include <utility>  // pair
#include <vector>
 
#include "open62541pp/config.hpp"
#include "open62541pp/datatype.hpp"
#include "open62541pp/detail/contextmap.hpp"
#include "open62541pp/detail/exceptioncatcher.hpp"
#include "open62541pp/detail/open62541/client.h"  // UA_SessionState, UA_SecureChannelState
#include "open62541pp/services/detail/monitoreditem_context.hpp"
#include "open62541pp/services/detail/subscription_context.hpp"
 
namespace opcua::detail {
 
enum class ClientState {
    Disconnected,
    Connected,
    SessionActivated,
    SessionClosed,
};
inline constexpr size_t clientStateCount = 4;
 
/**
 * Internal storage for Client class.
 */
struct ClientContext {
    ExceptionCatcher exceptionCatcher;
    std::atomic<bool> running{false};
 
    std::vector<DataType> dataTypes;
    std::unique_ptr<UA_DataTypeArray> dataTypeArray;
 
#ifdef UA_ENABLE_SUBSCRIPTIONS
    using SubId = uint32_t;
    using MonId = uint32_t;
    using SubMonId = std::pair<uint32_t, uint32_t>;
    ContextMap<SubId, services::detail::SubscriptionContext> subscriptions;
    ContextMap<SubMonId, services::detail::MonitoredItemContext> monitoredItems;
#endif
 
#if UAPP_OPEN62541_VER_LE(1, 0)
    UA_ClientState lastClientState{};
#else
    UA_SessionState lastSessionState{};
    UA_SecureChannelState lastChannelState{};
#endif
    std::array<std::function<void()>, clientStateCount> stateCallbacks;
    std::function<void()> inactivityCallback;
};
 
}  // namespace opcua::detail