Files
mxaccessgw/clients/dotnet/ZB.MOM.WW.MxGateway.Client/MxGatewaySession.cs
T
Joseph Doherty b3ae200b11 .NET client: port bulk read/write SDK methods + CLI subcommands
Adds the value-bulk SDK surface and CLI subcommands that lived on the
divergent branch (commit f220908) but were never merged into main.
HEAD's MxGatewaySession only had the subscribe-style bulks (AddItem /
Advise / Remove / UnAdvise / Subscribe / Unsubscribe). The proto
contract already defined ReadBulkCommand / WriteBulkCommand /
Write2BulkCommand / WriteSecuredBulkCommand / WriteSecured2BulkCommand
/ BulkReadReply / BulkWriteReply, so this is purely a client-side
addition.

SDK (MxGatewaySession.cs):
- WriteBulkAsync(serverHandle, IReadOnlyList<WriteBulkEntry>, ct)
- Write2BulkAsync(serverHandle, IReadOnlyList<Write2BulkEntry>, ct)
- WriteSecuredBulkAsync(serverHandle, IReadOnlyList<WriteSecuredBulkEntry>, ct)
- WriteSecured2BulkAsync(serverHandle, IReadOnlyList<WriteSecured2BulkEntry>, ct)
- ReadBulkAsync(serverHandle, IReadOnlyList<string> tagAddresses, TimeSpan timeout, ct)

Per-entry secured user ids live on each WriteSecured(2)BulkEntry — they
are NOT lifted to ctor args because the proto field shape allows distinct
ids per row.

CLI (MxGatewayClientCli.cs):
- read-bulk / write-bulk / write2-bulk / write-secured-bulk / write-secured2-bulk
  routed through the existing dispatch table, with --type, --values,
  --item-handles, --timeout-ms, --current-user-id, --verifier-user-id,
  --timestamp flags matching the cross-language CLI surface.
- bench-read-bulk benchmark harness: warmup + steady-state ReadBulk loop
  with p50/p95/p99/max/mean latency, emitting the shared JSON schema so
  scripts/bench-read-bulk.ps1 collates the .NET line alongside the four
  other clients.

The new subcommands flow through the existing batch dispatcher without
further changes.

Verification: dotnet build clean (0 warnings / 0 errors);
dotnet test 59/59 passing. Manual smoke against the live gateway
on localhost:5120: read-bulk returned 2 BulkReadResult entries with
wasSuccessful=true, wasCached=true; write-bulk on int32 returned
wasSuccessful=true; close-session returned SESSION_STATE_CLOSED.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-24 04:49:33 -04:00

845 lines
33 KiB
C#

using ZB.MOM.WW.MxGateway.Contracts.Proto;
namespace ZB.MOM.WW.MxGateway.Client;
/// <summary>
/// Represents one gateway-backed MXAccess session.
/// </summary>
public sealed class MxGatewaySession : IAsyncDisposable
{
private readonly MxGatewayClient _client;
private readonly SemaphoreSlim _closeLock = new(1, 1);
private CloseSessionReply? _closeReply;
/// <summary>
/// Initializes a new session backed by the given MXAccess gateway client.
/// </summary>
/// <param name="client">The gateway client used for commands and events.</param>
/// <param name="openSessionReply">The server's session creation response.</param>
internal MxGatewaySession(
MxGatewayClient client,
OpenSessionReply openSessionReply)
{
_client = client ?? throw new ArgumentNullException(nameof(client));
OpenSessionReply = openSessionReply ?? throw new ArgumentNullException(nameof(openSessionReply));
}
/// <summary>
/// The session ID assigned by the gateway.
/// </summary>
public string SessionId => OpenSessionReply.SessionId;
/// <summary>
/// The server's session creation response containing metadata.
/// </summary>
public OpenSessionReply OpenSessionReply { get; }
/// <summary>
/// Closes the session on the gateway. Idempotent.
/// </summary>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The server's close-session reply.</returns>
public async Task<CloseSessionReply> CloseAsync(CancellationToken cancellationToken = default)
{
if (_closeReply is not null)
{
return _closeReply;
}
await _closeLock.WaitAsync(cancellationToken).ConfigureAwait(false);
try
{
if (_closeReply is not null)
{
return _closeReply;
}
_closeReply = await _client.CloseSessionRawAsync(
new CloseSessionRequest { SessionId = SessionId },
cancellationToken)
.ConfigureAwait(false);
return _closeReply;
}
finally
{
_closeLock.Release();
}
}
/// <summary>
/// Registers a client with the MXAccess session, returning a ServerHandle.
/// </summary>
/// <param name="clientName">Name to register.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The server handle assigned to the registered client.</returns>
public async Task<int> RegisterAsync(
string clientName,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await RegisterRawAsync(clientName, cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.Register?.ServerHandle ?? reply.ReturnValue.Int32Value;
}
/// <summary>
/// Registers a client with the MXAccess session without error checking.
/// </summary>
/// <param name="clientName">Name to register.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> RegisterRawAsync(
string clientName,
CancellationToken cancellationToken = default)
{
ArgumentException.ThrowIfNullOrWhiteSpace(clientName);
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.Register,
Register = new RegisterCommand { ClientName = clientName },
},
cancellationToken);
}
/// <summary>
/// Adds an item to the MXAccess session, returning an ItemHandle.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemDefinition">The item tag address.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The item handle assigned to the new item.</returns>
public async Task<int> AddItemAsync(
int serverHandle,
string itemDefinition,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await AddItemRawAsync(
serverHandle,
itemDefinition,
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.AddItem?.ItemHandle ?? reply.ReturnValue.Int32Value;
}
/// <summary>
/// Adds an item to the MXAccess session without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemDefinition">The item tag address.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> AddItemRawAsync(
int serverHandle,
string itemDefinition,
CancellationToken cancellationToken = default)
{
ArgumentException.ThrowIfNullOrWhiteSpace(itemDefinition);
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.AddItem,
AddItem = new AddItemCommand
{
ServerHandle = serverHandle,
ItemDefinition = itemDefinition,
},
},
cancellationToken);
}
/// <summary>
/// Adds an item with context to the MXAccess session, returning an ItemHandle.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemDefinition">The item tag address.</param>
/// <param name="itemContext">Additional context for the item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The item handle assigned to the new item.</returns>
public async Task<int> AddItem2Async(
int serverHandle,
string itemDefinition,
string itemContext,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await AddItem2RawAsync(
serverHandle,
itemDefinition,
itemContext,
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.AddItem2?.ItemHandle ?? reply.ReturnValue.Int32Value;
}
/// <summary>
/// Adds an item with context to the MXAccess session without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemDefinition">The item tag address.</param>
/// <param name="itemContext">Additional context for the item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> AddItem2RawAsync(
int serverHandle,
string itemDefinition,
string itemContext,
CancellationToken cancellationToken = default)
{
ArgumentException.ThrowIfNullOrWhiteSpace(itemDefinition);
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.AddItem2,
AddItem2 = new AddItem2Command
{
ServerHandle = serverHandle,
ItemDefinition = itemDefinition,
ItemContext = itemContext ?? string.Empty,
},
},
cancellationToken);
}
/// <summary>
/// Subscribes to events for an item (advises in MXAccess terminology).
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
public async Task AdviseAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await AdviseRawAsync(serverHandle, itemHandle, cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
}
/// <summary>
/// Subscribes to events for an item without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> AdviseRawAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.Advise,
Advise = new AdviseCommand
{
ServerHandle = serverHandle,
ItemHandle = itemHandle,
},
},
cancellationToken);
}
/// <summary>
/// Unsubscribes from events for an item (unadvises in MXAccess terminology).
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
public async Task UnAdviseAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await UnAdviseRawAsync(serverHandle, itemHandle, cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
}
/// <summary>
/// Unsubscribes from events for an item without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> UnAdviseRawAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.UnAdvise,
UnAdvise = new UnAdviseCommand
{
ServerHandle = serverHandle,
ItemHandle = itemHandle,
},
},
cancellationToken);
}
/// <summary>
/// Removes an item from the MXAccess session.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
public async Task RemoveItemAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await RemoveItemRawAsync(serverHandle, itemHandle, cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
}
/// <summary>
/// Removes an item from the MXAccess session without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> RemoveItemRawAsync(
int serverHandle,
int itemHandle,
CancellationToken cancellationToken = default)
{
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.RemoveItem,
RemoveItem = new RemoveItemCommand
{
ServerHandle = serverHandle,
ItemHandle = itemHandle,
},
},
cancellationToken);
}
/// <summary>
/// Adds multiple items to the MXAccess session in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="tagAddresses">The item tag addresses to add.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> AddItemBulkAsync(
int serverHandle,
IReadOnlyList<string> tagAddresses,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(tagAddresses);
AddItemBulkCommand command = new() { ServerHandle = serverHandle };
command.TagAddresses.Add(tagAddresses);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.AddItemBulk,
AddItemBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.AddItemBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Advises multiple items in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandles">The ItemHandles to advise.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> AdviseItemBulkAsync(
int serverHandle,
IReadOnlyList<int> itemHandles,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(itemHandles);
AdviseItemBulkCommand command = new() { ServerHandle = serverHandle };
command.ItemHandles.Add(itemHandles);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.AdviseItemBulk,
AdviseItemBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.AdviseItemBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Removes multiple items in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandles">The ItemHandles to remove.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> RemoveItemBulkAsync(
int serverHandle,
IReadOnlyList<int> itemHandles,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(itemHandles);
RemoveItemBulkCommand command = new() { ServerHandle = serverHandle };
command.ItemHandles.Add(itemHandles);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.RemoveItemBulk,
RemoveItemBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.RemoveItemBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Unadvises multiple items in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandles">The ItemHandles to unadvise.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> UnAdviseItemBulkAsync(
int serverHandle,
IReadOnlyList<int> itemHandles,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(itemHandles);
UnAdviseItemBulkCommand command = new() { ServerHandle = serverHandle };
command.ItemHandles.Add(itemHandles);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.UnAdviseItemBulk,
UnAdviseItemBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.UnAdviseItemBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Adds and advises multiple items in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="tagAddresses">The item tag addresses to add and advise.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> SubscribeBulkAsync(
int serverHandle,
IReadOnlyList<string> tagAddresses,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(tagAddresses);
SubscribeBulkCommand command = new() { ServerHandle = serverHandle };
command.TagAddresses.Add(tagAddresses);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.SubscribeBulk,
SubscribeBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.SubscribeBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Unadvises and removes multiple items in a single command.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandles">The ItemHandles to unsubscribe.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>Per-item subscription results.</returns>
public async Task<IReadOnlyList<SubscribeResult>> UnsubscribeBulkAsync(
int serverHandle,
IReadOnlyList<int> itemHandles,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(itemHandles);
UnsubscribeBulkCommand command = new() { ServerHandle = serverHandle };
command.ItemHandles.Add(itemHandles);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.UnsubscribeBulk,
UnsubscribeBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.UnsubscribeBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Bulk Write — sequential MXAccess Write per entry on the worker's STA.
/// Per-item failures appear as <see cref="BulkWriteResult"/> entries with
/// <c>WasSuccessful = false</c>; the call never throws on per-item errors.
/// Protocol-level failures still throw via EnsureProtocolSuccess.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="entries">Per-item write entries; each carries the item handle, value, and user id.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>One <see cref="BulkWriteResult"/> per requested entry, in request order.</returns>
public async Task<IReadOnlyList<BulkWriteResult>> WriteBulkAsync(
int serverHandle,
IReadOnlyList<WriteBulkEntry> entries,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(entries);
WriteBulkCommand command = new() { ServerHandle = serverHandle };
command.Entries.Add(entries);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.WriteBulk,
WriteBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.WriteBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Bulk Write2 — sequential MXAccess Write2 (timestamped) per entry.
/// Per-item failures appear as <see cref="BulkWriteResult"/> entries with
/// <c>WasSuccessful = false</c>; the call never throws on per-item errors.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="entries">Per-item write entries; each carries the item handle, value, timestamp, and user id.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>One <see cref="BulkWriteResult"/> per requested entry, in request order.</returns>
public async Task<IReadOnlyList<BulkWriteResult>> Write2BulkAsync(
int serverHandle,
IReadOnlyList<Write2BulkEntry> entries,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(entries);
Write2BulkCommand command = new() { ServerHandle = serverHandle };
command.Entries.Add(entries);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.Write2Bulk,
Write2Bulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.Write2Bulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Bulk WriteSecured — sequential MXAccess WriteSecured per entry.
/// Credential-sensitive values must never reach logs; the client mirrors
/// the single-item WriteSecured redaction contract.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="entries">Per-item write entries; each carries the item handle, value, current user id, and verifier user id.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>One <see cref="BulkWriteResult"/> per requested entry, in request order.</returns>
public async Task<IReadOnlyList<BulkWriteResult>> WriteSecuredBulkAsync(
int serverHandle,
IReadOnlyList<WriteSecuredBulkEntry> entries,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(entries);
WriteSecuredBulkCommand command = new() { ServerHandle = serverHandle };
command.Entries.Add(entries);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.WriteSecuredBulk,
WriteSecuredBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.WriteSecuredBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Bulk WriteSecured2 — sequential MXAccess WriteSecured2 (timestamped) per entry.
/// Same redaction rules as <see cref="WriteSecuredBulkAsync"/>.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="entries">Per-item write entries; each carries the item handle, value, timestamp, current user id, and verifier user id.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>One <see cref="BulkWriteResult"/> per requested entry, in request order.</returns>
public async Task<IReadOnlyList<BulkWriteResult>> WriteSecured2BulkAsync(
int serverHandle,
IReadOnlyList<WriteSecured2BulkEntry> entries,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(entries);
WriteSecured2BulkCommand command = new() { ServerHandle = serverHandle };
command.Entries.Add(entries);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.WriteSecured2Bulk,
WriteSecured2Bulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.WriteSecured2Bulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Bulk Read — snapshot the current value for each requested tag.
/// Returns the cached OnDataChange value when the tag is already advised
/// (<c>WasCached = true</c>), otherwise the worker takes the full AddItem +
/// Advise + wait + UnAdvise + RemoveItem snapshot lifecycle. Per-tag
/// failures (timeout, invalid tag) appear as <see cref="BulkReadResult"/>
/// entries with <c>WasSuccessful = false</c>; the call never throws on
/// per-tag errors.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="tagAddresses">Tag addresses to read (one per result).</param>
/// <param name="timeout">Per-call timeout for the snapshot lifecycle path; <see cref="TimeSpan.Zero"/> uses the gateway default.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>One <see cref="BulkReadResult"/> per requested tag, in request order.</returns>
public async Task<IReadOnlyList<BulkReadResult>> ReadBulkAsync(
int serverHandle,
IReadOnlyList<string> tagAddresses,
TimeSpan timeout,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(tagAddresses);
ReadBulkCommand command = new()
{
ServerHandle = serverHandle,
TimeoutMs = timeout <= TimeSpan.Zero ? 0u : (uint)Math.Min(timeout.TotalMilliseconds, uint.MaxValue),
};
command.TagAddresses.Add(tagAddresses);
MxCommandReply reply = await InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.ReadBulk,
ReadBulk = command,
},
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
return reply.ReadBulk?.Results.ToArray() ?? [];
}
/// <summary>
/// Writes a value to an item on the MXAccess server.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="value">The value to write.</param>
/// <param name="userId">User ID context for the write.</param>
/// <param name="cancellationToken">Cancellation token.</param>
public async Task WriteAsync(
int serverHandle,
int itemHandle,
MxValue value,
int userId,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await WriteRawAsync(serverHandle, itemHandle, value, userId, cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
}
/// <summary>
/// Writes a value to an item on the MXAccess server without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="value">The value to write.</param>
/// <param name="userId">User ID context for the write.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> WriteRawAsync(
int serverHandle,
int itemHandle,
MxValue value,
int userId,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(value);
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.Write,
Write = new WriteCommand
{
ServerHandle = serverHandle,
ItemHandle = itemHandle,
Value = value,
UserId = userId,
},
},
cancellationToken);
}
/// <summary>
/// Writes a value and timestamp to an item on the MXAccess server.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="value">The value to write.</param>
/// <param name="timestampValue">The timestamp to write with the value.</param>
/// <param name="userId">User ID context for the write.</param>
/// <param name="cancellationToken">Cancellation token.</param>
public async Task Write2Async(
int serverHandle,
int itemHandle,
MxValue value,
MxValue timestampValue,
int userId,
CancellationToken cancellationToken = default)
{
MxCommandReply reply = await Write2RawAsync(
serverHandle,
itemHandle,
value,
timestampValue,
userId,
cancellationToken)
.ConfigureAwait(false);
reply.EnsureProtocolSuccess().EnsureMxAccessSuccess();
}
/// <summary>
/// Writes a value and timestamp to an item on the MXAccess server without error checking.
/// </summary>
/// <param name="serverHandle">The ServerHandle from register.</param>
/// <param name="itemHandle">The ItemHandle from add-item.</param>
/// <param name="value">The value to write.</param>
/// <param name="timestampValue">The timestamp to write with the value.</param>
/// <param name="userId">User ID context for the write.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> Write2RawAsync(
int serverHandle,
int itemHandle,
MxValue value,
MxValue timestampValue,
int userId,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(value);
ArgumentNullException.ThrowIfNull(timestampValue);
return InvokeCommandAsync(
new MxCommand
{
Kind = MxCommandKind.Write2,
Write2 = new Write2Command
{
ServerHandle = serverHandle,
ItemHandle = itemHandle,
Value = value,
TimestampValue = timestampValue,
UserId = userId,
},
},
cancellationToken);
}
/// <summary>
/// Invokes an MXAccess command on this session.
/// </summary>
/// <param name="request">The command request.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>The raw server reply.</returns>
public Task<MxCommandReply> InvokeAsync(
MxCommandRequest request,
CancellationToken cancellationToken = default)
{
ArgumentNullException.ThrowIfNull(request);
return _client.InvokeAsync(request, cancellationToken);
}
/// <summary>
/// Streams events from the worker for this session, optionally starting after a given sequence number.
/// </summary>
/// <param name="afterWorkerSequence">The sequence number to stream from. Defaults to 0.</param>
/// <param name="cancellationToken">Cancellation token.</param>
/// <returns>An async enumerable of events.</returns>
public IAsyncEnumerable<MxEvent> StreamEventsAsync(
ulong afterWorkerSequence = 0,
CancellationToken cancellationToken = default)
{
return _client.StreamEventsAsync(
new StreamEventsRequest
{
SessionId = SessionId,
AfterWorkerSequence = afterWorkerSequence,
},
cancellationToken);
}
/// <summary>
/// Closes the session and releases resources.
/// </summary>
public async ValueTask DisposeAsync()
{
await CloseAsync().ConfigureAwait(false);
_closeLock.Dispose();
}
private Task<MxCommandReply> InvokeCommandAsync(
MxCommand command,
CancellationToken cancellationToken)
{
return _client.InvokeAsync(
new MxCommandRequest
{
SessionId = SessionId,
ClientCorrelationId = Guid.NewGuid().ToString("N"),
Command = command,
},
cancellationToken);
}
}