Samuele Locatelli
132 lines
4.9 KiB
C#
132 lines
4.9 KiB
C#
/* ========================================================================
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* Copyright (c) 2005-2020 The OPC Foundation, Inc. All rights reserved.
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*
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* OPC Foundation MIT License 1.00
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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* The complete license agreement can be found here:
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* http://opcfoundation.org/License/MIT/1.00/
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* ======================================================================*/
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using System;
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using System.Collections.Generic;
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namespace Opc.Ua.PubSub
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{
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/// <summary>
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/// DataStore is a repository where Publisher applications will push data values for nodes + attributes published in data sets
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/// </summary>
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public class UaPubSubDataStore : IUaPubSubDataStore
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{
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#region Private Fields
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private readonly object m_lock = new object();
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private Dictionary<NodeId, Dictionary<uint, DataValue>> m_store;
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#endregion
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#region Constructor
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/// <summary>
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/// Create new instance of <see cref="UaPubSubDataStore"/>
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/// </summary>
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public UaPubSubDataStore()
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{
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m_store = new Dictionary<NodeId, Dictionary<uint, DataValue>>();
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}
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#endregion
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#region Read/Write Public Methods
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/// <summary>
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/// Write a DataValue to the DataStore.
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/// The DataValue is identified by node NodeId and Attribute.
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/// </summary>
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/// <param name="nodeId">NodeId identifier for DataValue that will be stored</param>
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/// <param name="attributeId">Default value is <see cref="Attributes.Value"/>.</param>
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/// <param name="dataValue">Default value is null. </param>
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public void WritePublishedDataItem(NodeId nodeId, uint attributeId = Attributes.Value, DataValue dataValue = null)
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{
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if (nodeId == null)
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{
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throw new ArgumentException(nameof(nodeId));
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}
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if (attributeId == 0)
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{
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attributeId = Attributes.Value;
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}
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if (!Attributes.IsValid(attributeId))
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{
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throw new ArgumentException(nameof(attributeId));
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}
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//copy instance of dataValue to be stored
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if (dataValue != null)
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{
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dataValue = Utils.Clone(dataValue) as DataValue;
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}
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lock (m_lock)
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{
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if (m_store.ContainsKey(nodeId))
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{
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m_store[nodeId][attributeId] = dataValue;
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}
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else
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{
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Dictionary<uint, DataValue> dictionary = new Dictionary<uint, DataValue>();
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dictionary.Add(attributeId, dataValue);
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m_store.Add(nodeId, dictionary);
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}
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}
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}
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/// <summary>
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/// Read the DataValue stored for a specific NodeId and Attribute.
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/// </summary>
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/// <param name="nodeId">NodeId identifier of node</param>
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/// <param name="attributeId">Default value is <see cref="Attributes.Value"/></param>
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/// <returns></returns>
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public DataValue ReadPublishedDataItem(NodeId nodeId, uint attributeId = Attributes.Value)
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{
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if (nodeId == null)
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{
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throw new ArgumentException(nameof(nodeId));
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}
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if (attributeId == 0)
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{
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attributeId = Attributes.Value;
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}
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if (!Attributes.IsValid(attributeId))
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{
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throw new ArgumentException(nameof(attributeId));
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}
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lock (m_lock)
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{
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if (m_store.ContainsKey(nodeId))
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{
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if (m_store[nodeId].ContainsKey(attributeId))
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{
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return m_store[nodeId][attributeId];
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}
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}
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}
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return null;
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}
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#endregion
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}
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}
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