Redis Blocking BRPOP example

RedisExampleListBlocking.linq

<Query Kind="Program">
  <NuGetReference>StackExchange.Redis</NuGetReference>
  <Namespace>StackExchange.Redis</Namespace>
  <Namespace>System.Threading.Tasks</Namespace>
</Query>

private static RedisKey WorkToDoList = "work-to-do-list";
private static RedisChannel WorkToDoChannel = "work-to-do";

// List-backed, blocker example
async Task Main()
{
	var connection = await ConnectionMultiplexer.ConnectAsync("localhost:6379");
	var db = connection.GetDatabase();

	_ = Task.Run(BlockingWait);
	
	while (true)
	{
		var message = "Hey " + DateTime.UtcNow.ToString("u");
		Console.WriteLine("Publishing " + message);
		await db.ListLeftPushAsync(WorkToDoList, message);
		await Task.Delay(1000);
	}
}

// Consumer side
public async Task BlockingWait()
{
	var connection = await ConnectionMultiplexer.ConnectAsync("localhost:6379");
	var db = connection.GetDatabase();
	
	Console.WriteLine("Starting blocking wait");	
	while (true)
	{
		var result = await db.ExecuteAsync("BRPOP", WorkToDoList, 1000);
		if (!result.IsNull)
		{
			var arr = (RedisValue[])result;
			if (arr.Length == 2)
			{
				// 0: list name (for listening to multiple)
				// 1: value popped
				var message = (string)arr[1];
				Console.WriteLine("Message received: " + message);
			}
		}
	}
}