mirror of
https://github.com/OPCFoundation/UA-.NETStandard.git
synced 2026-10-20 00:31:32 +08:00
Marc Schier
bd4543e961
- Add new managed session, wrapping session and providing connection management and failover handling - Add new Subscription engine that can act as alternative to current engine, but is based on channels with worker tasks - Add a fluent builder for managed session clients - Replace NodeCache with LruNodeCache, rename ILruNodeCache and LruNodeCache to INodeCache and NodeCache - Update migration guide and document new functionality.
80 lines
2.9 KiB
C#
80 lines
2.9 KiB
C#
/* ========================================================================
|
|
* Copyright (c) 2005-2025 The OPC Foundation, Inc. All rights reserved.
|
|
*
|
|
* OPC Foundation MIT License 1.00
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use,
|
|
* copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
* copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following
|
|
* conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*
|
|
* The complete license agreement can be found here:
|
|
* http://opcfoundation.org/License/MIT/1.00/
|
|
* ======================================================================*/
|
|
|
|
using System;
|
|
|
|
namespace Opc.Ua.Client
|
|
{
|
|
/// <summary>
|
|
/// Connection states for a ManagedSession, following OPC UA
|
|
/// client connectivity guidance.
|
|
/// </summary>
|
|
public enum ConnectionState
|
|
{
|
|
/// <summary>Session is not connected and not attempting to connect.</summary>
|
|
Disconnected,
|
|
|
|
/// <summary>Session is attempting initial connection.</summary>
|
|
Connecting,
|
|
|
|
/// <summary>Session is connected and operational.</summary>
|
|
Connected,
|
|
|
|
/// <summary>Connection lost, attempting to reconnect to the same server.</summary>
|
|
Reconnecting,
|
|
|
|
/// <summary>Reconnect failed, attempting failover to a redundant server.</summary>
|
|
Failover,
|
|
|
|
/// <summary>Session is closing.</summary>
|
|
Closing,
|
|
|
|
/// <summary>Session is closed and disposed.</summary>
|
|
Closed
|
|
}
|
|
|
|
/// <summary>
|
|
/// Event args for connection state changes.
|
|
/// </summary>
|
|
public sealed class ConnectionStateChangedEventArgs : EventArgs
|
|
{
|
|
/// <summary>The previous state.</summary>
|
|
public ConnectionState PreviousState { get; init; }
|
|
|
|
/// <summary>The new state.</summary>
|
|
public ConnectionState NewState { get; init; }
|
|
|
|
/// <summary>Service result if the transition was due to an error.</summary>
|
|
public ServiceResult? Error { get; init; }
|
|
|
|
/// <summary>The reconnect attempt number (0 when not reconnecting).</summary>
|
|
public int ReconnectAttempt { get; init; }
|
|
}
|
|
}
|