feature: Ward Gateway Service (Local-First Clinical Path)

2026-06-23 16:45:38 +08:00
parent d8e142fffe
commit 1bf8359097
100 changed files with 5474 additions and 4 deletions
@@ -0,0 +1,96 @@
+using Microsoft.Extensions.Hosting;
+using Microsoft.Extensions.Options;
+using RabbitMQ.Client;
+using RabbitMQ.Client.Exceptions;
+
+public sealed class RabbitMqTopologyProvisioner : IHostedService
+{
+    public const string Exchange = "clinical.notifications.exchange";
+    public const string PagingKey = "alerts.paging";
+    public const string EscalKey = "alerts.escalation";
+
+    private readonly RabbitMqOptions _opts;
+    private readonly IHostEnvironment _env;
+    private readonly ILogger<RabbitMqTopologyProvisioner> _logger;
+
+    public RabbitMqTopologyProvisioner(
+        IOptions<RabbitMqOptions> opts,
+        IHostEnvironment env,
+        ILogger<RabbitMqTopologyProvisioner> logger)
+    {
+        _opts = opts.Value;
+        _env = env;
+        _logger = logger;
+    }
+
+    public Task StartAsync(CancellationToken ct)
+    {
+        var factory = BuildFactory();
+        using var connection = factory.CreateConnection("gateway-topology");
+        using var channel = connection.CreateModel();
+
+        if (_env.IsDevelopment() || _env.EnvironmentName == "Testing")
+        {
+            using var cleanup = connection.CreateModel();
+            try
+            {
+                cleanup.QueueDelete("alerts.paging.dlq", ifUnused: false, ifEmpty: false);
+            }
+            catch (OperationInterruptedException ex)
+            {
+                _logger.LogDebug(ex, "DLQ delete skipped — queue may not exist yet");
+            }
+        }
+
+        channel.ExchangeDeclare(Exchange, ExchangeType.Direct, durable: true);
+
+        channel.QueueDeclare(
+            queue: "alerts.paging.queue",
+            durable: true,
+            exclusive: false,
+            autoDelete: false,
+            arguments: new Dictionary<string, object>
+            {
+                ["x-dead-letter-exchange"] = "",
+                ["x-dead-letter-routing-key"] = "alerts.paging.dlq",
+            });
+        channel.QueueBind("alerts.paging.queue", Exchange, PagingKey);
+
+        channel.QueueDeclare(
+            queue: "alerts.paging.dlq",
+            durable: true,
+            exclusive: false,
+            autoDelete: false,
+            arguments: new Dictionary<string, object>
+            {
+                ["x-message-ttl"] = _opts.PagingAckTimeoutMs,
+                ["x-dead-letter-exchange"] = Exchange,
+                ["x-dead-letter-routing-key"] = EscalKey,
+            });
+
+        channel.QueueDeclare(
+            queue: "alerts.escalation.queue",
+            durable: true,
+            exclusive: false,
+            autoDelete: false,
+            arguments: null);
+        channel.QueueBind("alerts.escalation.queue", Exchange, EscalKey);
+
+        _logger.LogInformation(
+            "Gateway RabbitMQ topology provisioned. Exchange={Exchange} PagingDlqTtlMs={Ttl}",
+            Exchange, _opts.PagingAckTimeoutMs);
+
+        return Task.CompletedTask;
+    }
+
+    public Task StopAsync(CancellationToken ct) => Task.CompletedTask;
+
+    public ConnectionFactory BuildFactory() => new()
+    {
+        HostName = _opts.Host,
+        Port = _opts.Port,
+        UserName = _opts.Username,
+        Password = _opts.Password,
+        DispatchConsumersAsync = true,
+    };
+}