Microsoft.SqlServer.XEvent.XELite 2019.7.2.9

Introduction

XELite is cross platform library to read XEvents from XEL files or live SQL streams.

Getting Started

Using XELite to parse XEL files

static void OutputXELFile(string fileName)
{
	var xeStream = new XEFileEventStreamer(fileName);

	xeStream.ReadEventStream(
		() => {
			Console.WriteLine("Headers found");
			return Task.CompletedTask;
		},
		xevent => {
			Console.WriteLine(xevent);
			Console.WriteLine("");
			return Task.CompletedTask;
		},
		CancellationToken.None).Wait();
}

Using XELite to connect to live event session

Step 1: Create & start event session. For example:

CREATE EVENT SESSION [sample_session] ON SERVER 
ADD EVENT sqlserver.sql_statement_completed(
    ACTION(sqlserver.sql_text))
GO

ALTER EVENT SESSION [sample_session] ON SERVER 
	STATE = START
GO

Step 2: Implement the code to connect and read the events. Here is a sample:

static void OutputXELStream(string connectionString, string sessionName)
{
    var cancellationTokenSource = new CancellationTokenSource();

    var xeStream = new XELiveEventStreamer(connectionString, sessionName);

    Console.WriteLine("Press any key to stop listening...");
    Task waitTask = Task.Run(() =>
        {
            Console.ReadKey();
            cancellationTokenSource.Cancel();
        });

    Task readTask = xeStream.ReadEventStream(() =>
        {
            Console.WriteLine("Connected to session");
            return Task.CompletedTask;
        },
        xevent =>
        {
            Console.WriteLine(xevent);
            Console.WriteLine("");
            return Task.CompletedTask;
        },
        cancellationTokenSource.Token);


    try
    {
        Task.WaitAny(waitTask, readTask);
    }
    catch (TaskCanceledException)
    {
    }

    if (readTask.IsFaulted)
    {
        Console.Error.WriteLine("Failed with: {0}", readTask.Exception);
    }
}