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luosheng
2023-07-12 06:42:28 +08:00
parent 25555cad18
commit db591e0367
188 changed files with 56088 additions and 9 deletions
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Technosoftware/DaAeHdaClient/Da/ISubscription.cs Normal file
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#region Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
//-----------------------------------------------------------------------------
// Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
// Web: https://www.technosoftware.com
//
// The source code in this file is covered under a dual-license scenario:
// - Owner of a purchased license: SCLA 1.0
// - GPL V3: everybody else
//
// SCLA license terms accompanied with this source code.
// See SCLA 1.0: https://technosoftware.com/license/Source_Code_License_Agreement.pdf
//
// GNU General Public License as published by the Free Software Foundation;
// version 3 of the License are accompanied with this source code.
// See https://technosoftware.com/license/GPLv3License.txt
//
// This source code is distributed in the hope that it will be useful, but
// WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
// or FITNESS FOR A PARTICULAR PURPOSE.
//-----------------------------------------------------------------------------
#endregion Copyright (c) 2011-2023 Technosoftware GmbH. All rights reserved
#region Using Directives
using System;
#endregion
namespace Technosoftware.DaAeHdaClient.Da
{
/// <summary>
/// A subscription for a set of items on a single OPC server.
/// </summary>
public interface ITsCDaSubscription : IDisposable
{
#region Events
/// <summary>
/// An event to receive data change updates.
/// </summary>
event TsCDaDataChangedEventHandler DataChangedEvent;
#endregion
#region Result Filters
/// <summary>
/// Returns the filters applied by the server to any item results returned to the client.
/// </summary>
/// <returns>A bit mask indicating which fields should be returned in any item results.</returns>
int GetResultFilters();
/// <summary>
/// Sets the filters applied by the server to any item results returned to the client.
/// </summary>
/// <param name="filters">A bit mask indicating which fields should be returned in any item results.</param>
void SetResultFilters(int filters);
#endregion
#region State Management
/// <summary>
/// Returns the current state of the subscription.
/// </summary>
/// <returns>The current state of the subscription.</returns>
TsCDaSubscriptionState GetState();
/// <summary>
/// Changes the state of a subscription.
/// </summary>
/// <param name="masks">A bit mask that indicates which elements of the subscription state are changing.</param>
/// <param name="state">The new subscription state.</param>
/// <returns>The actual subscription state after applying the changes.</returns>
TsCDaSubscriptionState ModifyState(int masks, TsCDaSubscriptionState state);
#endregion
#region Item Management
/// <summary>
/// Adds items to the subscription.
/// </summary>
/// <param name="items">The set of items to add to the subscription.</param>
/// <returns>The results of the add item operation for each item.</returns>
TsCDaItemResult[] AddItems(TsCDaItem[] items);
/// <summary>
/// Modifies the state of items in the subscription
/// </summary>
/// <param name="masks">Specifies which item state parameters are being modified.</param>
/// <param name="items">The new state for each item.</param>
/// <returns>The results of the modify item operation for each item.</returns>
TsCDaItemResult[] ModifyItems(int masks, TsCDaItem[] items);
/// <summary>
/// Removes items from the subscription.
/// </summary>
/// <param name="items">The identifiers (i.e. server handles) for the items being removed.</param>
/// <returns>The results of the remove item operation for each item.</returns>
OpcItemResult[] RemoveItems(OpcItem[] items);
#endregion
#region Synchronous I/O
/// <summary>
/// Reads the values for a set of items in the subscription.
/// </summary>
/// <param name="items">The identifiers (i.e. server handles) for the items being read.</param>
/// <returns>The value for each of items.</returns>
TsCDaItemValueResult[] Read(TsCDaItem[] items);
/// <summary>
/// Writes the value, quality and timestamp for a set of items in the subscription.
/// </summary>
/// <param name="items">The item values to write.</param>
/// <returns>The results of the write operation for each item.</returns>
OpcItemResult[] Write(TsCDaItemValue[] items);
#endregion
#region Asynchronous I/O
/// <summary>
/// Begins an asynchronous read operation for a set of items.
/// </summary>
/// <param name="items">The set of items to read (must include the item name).</param>
/// <param name="requestHandle">An identifier for the request assigned by the caller.</param>
/// <param name="callback">A delegate used to receive notifications when the request completes.</param>
/// <param name="request">An object that contains the state of the request (used to cancel the request).</param>
/// <returns>A set of results containing any errors encountered when the server validated the items.</returns>
OpcItemResult[] Read(
TsCDaItem[] items,
object requestHandle,
TsCDaReadCompleteEventHandler callback,
out IOpcRequest request);
/// <summary>
/// Begins an asynchronous write operation for a set of items.
/// </summary>
/// <param name="items">The set of item values to write (must include the item name).</param>
/// <param name="requestHandle">An identifier for the request assigned by the caller.</param>
/// <param name="callback">A delegate used to receive notifications when the request completes.</param>
/// <param name="request">An object that contains the state of the request (used to cancel the request).</param>
/// <returns>A set of results containing any errors encountered when the server validated the items.</returns>
OpcItemResult[] Write(
TsCDaItemValue[] items,
object requestHandle,
TsCDaWriteCompleteEventHandler callback,
out IOpcRequest request);
/// <summary>
/// Cancels an asynchronous read or write operation.
/// </summary>
/// <param name="request">The object returned from the BeginRead or BeginWrite request.</param>
/// <param name="callback">The function to invoke when the cancel completes.</param>
void Cancel(IOpcRequest request, TsCDaCancelCompleteEventHandler callback);
/// <summary>
/// Causes the server to send a data changed notification for all active items.
/// </summary>
void Refresh();
/// <summary>
/// Causes the server to send a data changed notification for all active items.
/// </summary>
/// <param name="requestHandle">An identifier for the request assigned by the caller.</param>
/// <param name="request">An object that contains the state of the request (used to cancel the request).</param>
/// <returns>A set of results containing any errors encountered when the server validated the items.</returns>
void Refresh(
object requestHandle,
out IOpcRequest request);
/// <summary>
/// Enables or disables data change notifications from the server.
/// </summary>
/// <param name="enabled">Whether data change notifications are enabled.</param>
void SetEnabled(bool enabled);
/// <summary>
/// Checks whether data change notifications from the server are enabled.
/// </summary>
/// <returns>Whether data change notifications are enabled.</returns>
bool GetEnabled();
#endregion
}
#region Delegate Declarations
/// <summary>
/// A delegate to receive data change updates from the server.
/// </summary>
/// <param name="subscriptionHandle">
/// A unique identifier for the subscription assigned by the client. If the parameter
/// <see cref="TsCDaSubscriptionState.ClientHandle">ClientHandle</see> is not defined this
/// parameter is empty.
/// </param>
/// <param name="requestHandle">
/// An identifier for the request assigned by the caller. This parameter is empty if
/// the corresponding parameter in the calls Read(), Write() or Refresh() is not defined.
/// Can be used to Cancel an outstanding operation.
/// </param>
/// <param name="values">
/// <para class="MsoBodyText" style="MARGIN: 1pt 0in">The set of changed values.</para>
/// <para class="MsoBodyText" style="MARGIN: 1pt 0in">Each value will always have
/// item’s ClientHandle field specified.</para>
/// </param>
public delegate void TsCDaDataChangedEventHandler(object subscriptionHandle, object requestHandle, TsCDaItemValueResult[] values);
/// <summary>
/// A delegate to receive asynchronous read completed notifications.
/// </summary>
/// <param name="requestHandle">
/// An identifier for the request assigned by the caller. This parameter is empty if
/// the corresponding parameter in the calls Read(), Write() or Refresh() is not defined.
/// Can be used to Cancel an outstanding operation.
/// </param>
/// <param name="results">The results of the last asynchronous read operation.</param>
public delegate void TsCDaReadCompleteEventHandler(object requestHandle, TsCDaItemValueResult[] results);
/// <summary>
/// A delegate to receive asynchronous write completed notifications.
/// </summary>
/// <param name="requestHandle">
/// An identifier for the request assigned by the caller. This parameter is empty if
/// the corresponding parameter in the calls Read(), Write() or Refresh() is not defined.
/// Can be used to Cancel an outstanding operation.
/// </param>
/// <param name="results">The results of the last asynchronous write operation.</param>
public delegate void TsCDaWriteCompleteEventHandler(object requestHandle, OpcItemResult[] results);
/// <summary>
/// A delegate to receive asynchronous cancel completed notifications.
/// </summary>
/// <param name="requestHandle">An identifier for the request assigned by the caller.</param>
public delegate void TsCDaCancelCompleteEventHandler(object requestHandle);
#endregion
}