Files
lmxopcua/src/Client/ZB.MOM.WW.OtOpcUa.Client.CLI/Commands/ReadCommand.cs
T
Joseph Doherty 7fe9f16cf8 fix(client-cli): resolve Low code-review findings (Client.CLI-002,003,004,006,007,008,009,010)
- Client.CLI-002: SubscribeCommand's neverWentBad list now requires the
  node to be present in lastStatus (i.e. received at least one update)
  so the 'suspect' bucket only contains observed nodes.
- Client.CLI-003: every long-running command validates numeric option
  ranges (Interval / Depth / MaxDepth / Duration / Max) and throws
  CliFx CommandException on out-of-range values.
- Client.CLI-004: SubscribeCommand carries XML summary docs on the
  type, ctor, every [CommandOption] property, and ExecuteAsync —
  matching the sibling commands' style.
- Client.CLI-006: HistoryReadCommand parses --start / --end with
  InvariantCulture+UTC and surfaces FormatException as CommandException;
  every NodeIdParser.ParseRequired call wraps FormatException /
  ArgumentException as CommandException.
- Client.CLI-007: CommandBase.ConfigureLogging calls Log.CloseAndFlush()
  before assigning a new Log.Logger so prior sinks are disposed.
- Client.CLI-008: rewrote the subscribe and historyread sections of
  docs/Client.CLI.md (every flag documented, summary-bucket vocabulary,
  StandardDeviation aggregate, UTC --start/--end convention).
- Client.CLI-009: SubscribeCommand / AlarmsCommand use named local
  handlers and detach them via -= after UnsubscribeAsync so no
  notification reaches the console after the command's output phase
  ends.
- Client.CLI-010: added CommandRangeValidationTests,
  EventHandlerLifecycleTests, InputValidationErrorsTests,
  LoggerLifecycleTests, and SubscribeCommandSummaryTests pinning every
  Low fix; FakeOpcUaClientService gained AddDiscoveredVariable +
  RaiseDataChanged + BrowseResultsByParent helpers.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-23 11:13:08 -04:00

69 lines
2.4 KiB
C#

using CliFx.Attributes;
using CliFx.Exceptions;
using CliFx.Infrastructure;
using Opc.Ua;
using ZB.MOM.WW.OtOpcUa.Client.CLI.Helpers;
using ZB.MOM.WW.OtOpcUa.Client.Shared;
namespace ZB.MOM.WW.OtOpcUa.Client.CLI.Commands;
[Command("read", Description = "Read a value from a node")]
public class ReadCommand : CommandBase
{
/// <summary>
/// Creates the point-read command used to inspect the current value of a node.
/// </summary>
/// <param name="factory">The factory that creates the shared client service for the command run.</param>
public ReadCommand(IOpcUaClientServiceFactory factory) : base(factory)
{
}
/// <summary>
/// Gets the node whose current value should be read.
/// </summary>
[CommandOption("node", 'n', Description = "Node ID (e.g. ns=2;s=MyNode)", IsRequired = true)]
public string NodeId { get; init; } = default!;
/// <summary>
/// Connects to the server and prints the current value, status, and timestamps for the requested node.
/// </summary>
/// <param name="console">The CLI console used for output and cancellation handling.</param>
public override async ValueTask ExecuteAsync(IConsole console)
{
ConfigureLogging();
NodeId nodeId;
try
{
nodeId = NodeIdParser.ParseRequired(NodeId);
}
catch (Exception ex) when (ex is FormatException or ArgumentException)
{
throw new CommandException($"Invalid --node value: {ex.Message}");
}
IOpcUaClientService? service = null;
try
{
var ct = console.RegisterCancellationHandler();
(service, _) = await CreateServiceAndConnectAsync(ct);
var value = await service.ReadValueAsync(nodeId, ct);
await console.Output.WriteLineAsync($"Node: {NodeId}");
await console.Output.WriteLineAsync($"Value: {value.Value}");
await console.Output.WriteLineAsync($"Status: {value.StatusCode}");
await console.Output.WriteLineAsync($"Source Time: {value.SourceTimestamp:O}");
await console.Output.WriteLineAsync($"Server Time: {value.ServerTimestamp:O}");
}
finally
{
if (service != null)
{
await service.DisconnectAsync();
service.Dispose();
}
}
}
}