unkin-agent
00d0765152
Publish every session to valkey with the instance holding it, and route a command for a non-local session to its owner over a per-instance pub/sub channel. Entries expire, so a dead instance leaves the directory.
66 lines
2.2 KiB
C#
66 lines
2.2 KiB
C#
using System;
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using System.Text.Json;
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using System.Threading;
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using System.Threading.Tasks;
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using Jellyfin.Extensions.Json;
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using MediaBrowser.Controller.Session;
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using MediaBrowser.Model.Session;
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namespace Emby.Server.Implementations.Session;
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/// <summary>
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/// Stands in for the websocket of a session another instance holds: messages are forwarded to that
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/// instance, which writes them to the connection it owns.
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/// </summary>
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public sealed class RemoteSessionController : ISessionController
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{
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private readonly IPodMessageBus _bus;
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private readonly string _ownerPod;
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private readonly string _sessionId;
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/// <summary>
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/// Initializes a new instance of the <see cref="RemoteSessionController"/> class.
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/// </summary>
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/// <param name="bus">The cross-instance bus.</param>
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/// <param name="ownerPod">The instance holding the connection.</param>
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/// <param name="sessionId">The session identifier.</param>
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/// <param name="isSessionActive">Whether the owner reported the session as active.</param>
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/// <param name="supportsMediaControl">Whether the owner reported the session as controllable.</param>
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public RemoteSessionController(IPodMessageBus bus, string ownerPod, string sessionId, bool isSessionActive, bool supportsMediaControl)
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{
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_bus = bus;
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_ownerPod = ownerPod;
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_sessionId = sessionId;
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IsSessionActive = isSessionActive;
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SupportsMediaControl = supportsMediaControl;
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}
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/// <inheritdoc />
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public bool IsSessionActive { get; }
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/// <inheritdoc />
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public bool SupportsMediaControl { get; }
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/// <inheritdoc />
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public Task SendMessage<T>(SessionMessageType name, Guid messageId, T data, CancellationToken cancellationToken)
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{
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var routed = new RoutedSessionMessage
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{
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SessionId = _sessionId,
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MessageType = name,
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MessageId = messageId,
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Data = JsonSerializer.Serialize(data, JsonDefaults.Options)
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};
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_bus.Publish(
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_ownerPod,
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new PodMessage
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{
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Kind = RoutedSessionMessage.Kind,
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Payload = JsonSerializer.Serialize(routed, JsonDefaults.Options)
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});
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return Task.CompletedTask;
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}
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}
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