* Allow passing hostname to GH-1749 program as the first arg.

Author: lukebakken

projects/Applications/GH-1749/Program.cs

@@ -52,18 +52,28 @@ protected override Task OnCancelAsync(string[] consumerTags, CancellationToken c
 
     static class Program
     {
+        const string DefaultHostName = "localhost";
         const string ConnectionClientProvidedName = "GH_1749";
-
-        static readonly Util s_util = new();
         static readonly CancellationTokenSource s_cancellationTokenSource = new();
         static readonly CancellationToken s_cancellationToken = s_cancellationTokenSource.Token;
 
+        static Util? s_util;
+
         static async Task Main(string[] args)
         {
+            string hostname = DefaultHostName;
+            if (args.Length > 0)
+            {
+                hostname = args[0];
+            }
+
+            s_util = new Util(hostname, "guest", "guest");
+
             AppDomain.CurrentDomain.FirstChanceException += CurrentDomain_FirstChanceException;
 
             ConnectionFactory connectionFactory = new()
             {
+                HostName = hostname,
                 AutomaticRecoveryEnabled = true,
                 UserName = "guest",
                 Password = "guest",
@@ -87,9 +97,10 @@ static async Task Main(string[] args)
 
             connection.ConnectionRecoveryErrorAsync += Connection_ConnectionRecoveryErrorAsync;
 
-            connection.ConnectionShutdownAsync += async (object sender, ShutdownEventArgs ea) =>
+            connection.ConnectionShutdownAsync += (object sender, ShutdownEventArgs ea) =>
             {
                 Console.WriteLine("{0} [INFO] saw ConnectionShutdownAsync, event: {1}", Now, ea);
+                return Task.CompletedTask;
             };
 
             connection.ConsumerTagChangeAfterRecoveryAsync += Connection_ConsumerTagChangeAfterRecoveryAsync;
@@ -99,6 +110,9 @@ static async Task Main(string[] args)
 
             await using var channel = await connection.CreateChannelAsync(options: channelOptions);
 
+            channel.CallbackExceptionAsync += Channel_CallbackExceptionAsync;
+            channel.ChannelShutdownAsync += Channel_ChannelShutdownAsync;
+
             QueueDeclareOk queue = await channel.QueueDeclareAsync();
 
             var consumer = new GH1749Consumer(channel);
@@ -112,6 +126,11 @@ static async Task Main(string[] args)
 
         static async Task CloseConnectionAsync()
         {
+            if (s_util is null)
+            {
+                throw new NullReferenceException("s_util");
+            }
+
             try
             {
                 Console.WriteLine("{0} [INFO] start closing connection: {1}", Now, ConnectionClientProvidedName);
@@ -126,16 +145,31 @@ static async Task CloseConnectionAsync()
 
         private static string Now => Util.Now;
 
-        private static void CurrentDomain_FirstChanceException(object? sender, FirstChanceExceptionEventArgs e)
+        private static Task Channel_CallbackExceptionAsync(object sender, CallbackExceptionEventArgs ea)
+        {
+            Console.WriteLine("{0} [INFO] channel saw CallbackExceptionAsync, event: {1}", Now, ea);
+            Console.WriteLine("{0} [INFO] channel CallbackExceptionAsync, exception: {1}", Now, ea.Exception);
+            return Task.CompletedTask;
+        }
+
+        private static Task Channel_ChannelShutdownAsync(object sender, ShutdownEventArgs ea)
         {
-            Console.WriteLine("{0} [INFO] saw FirstChanceException, exception: {1}", Now, e.Exception);
+            Console.WriteLine("{0} [INFO] saw ChannelShutdownAsync, event: {1}", Now, ea);
+            return Task.CompletedTask;
         }
 
+        private static void CurrentDomain_FirstChanceException(object? sender, FirstChanceExceptionEventArgs e)
+        {
+            if (e.Exception is ObjectDisposedException)
+            {
+                Console.WriteLine("{0} [INFO] saw FirstChanceException, exception: {1}", Now, e.Exception);
+            }
+        }
 
         private static Task Connection_CallbackExceptionAsync(object sender, CallbackExceptionEventArgs ea)
         {
-            Console.WriteLine("{0} [INFO] saw CallbackExceptionAsync, event: {1}", Now, ea);
-            Console.WriteLine("{0} [INFO] CallbackExceptionAsync, exception: {1}", Now, ea.Exception);
+            Console.WriteLine("{0} [INFO] connection saw CallbackExceptionAsync, event: {1}", Now, ea);
+            Console.WriteLine("{0} [INFO] connection CallbackExceptionAsync, exception: {1}", Now, ea.Exception);
             return Task.CompletedTask;
         }
 

projects/Applications/GH-1749/Util.cs

@@ -42,11 +42,11 @@ public class Util : IDisposable
         private readonly ManagementClient _managementClient;
         private static readonly bool s_isWindows = false;
 
-        public Util() : this("guest", "guest")
+        public Util() : this("localhost", "guest", "guest")
         {
         }
 
-        public Util(string managementUsername, string managementPassword)
+        public Util(string hostname, string managementUsername, string managementPassword)
         {
             if (string.IsNullOrEmpty(managementUsername))
             {
@@ -58,7 +58,7 @@ public Util(string managementUsername, string managementPassword)
                 throw new ArgumentNullException(nameof(managementPassword));
             }
 
-            var managementUri = new Uri("http://localhost:15672");
+            var managementUri = new Uri($"http://{hostname}:15672");
             _managementClient = new ManagementClient(managementUri, managementUsername, managementPassword);
         }