Logger Logger Logger Logger Class

Definición

Cuando se reemplaza en un formulario derivado, proporciona funciones a los registradores que controlan los eventos provocados por el motor de MSBuild.When overridden in a derived form, provides functionality for loggers that handle events raised by the MSBuild engine.

public ref class Logger abstract : Microsoft::Build::Framework::ILogger
public abstract class Logger : Microsoft.Build.Framework.ILogger
type Logger = class
    interface ILogger
Public MustInherit Class Logger
Implements ILogger
Herencia
LoggerLoggerLoggerLogger
Implementaciones

Ejemplos

El ejemplo siguiente muestra cómo escribir un registrador básico que responde a eventos de compilación.The following example shows how to write a basic logger that responds to build events.

using System;
using System.IO;
using System.Security;
using Microsoft.Build.Framework;
using Microsoft.Build.Utilities;

namespace MyLoggers
{
	// This logger will derive from the Microsoft.Build.Utilities.Logger class,
	// which provides it with getters and setters for Verbosity and Parameters,
	// and a default empty Shutdown() implementation.
	public class BasicFileLogger : Logger
	{
		/// <summary>
		/// Initialize is guaranteed to be called by MSBuild at the start of the build
		/// before any events are raised.
		/// </summary>
		public override void Initialize(IEventSource eventSource)
		{
			// The name of the log file should be passed as the first item in the
			// "parameters" specification in the /logger switch.  It is required
			// to pass a log file to this logger. Other loggers may have zero or more than 
			// one parameters.
			if (null == Parameters)
			{
				throw new LoggerException("Log file was not set.");
			}
			string[] parameters = Parameters.Split(';');
			
			string logFile = parameters[0];
			if (String.IsNullOrEmpty(logFile))
			{
				throw new LoggerException("Log file was not set.");
			}
			
			if (parameters.Length > 1)
			{
				throw new LoggerException("Too many parameters passed.");
			}
			
			try
			{
				// Open the file
				this.streamWriter = new StreamWriter(logFile);
			}
			catch (Exception ex)
			{
				if
				(
					ex is UnauthorizedAccessException
					|| ex is ArgumentNullException
					|| ex is PathTooLongException
					|| ex is DirectoryNotFoundException
					|| ex is NotSupportedException
					|| ex is ArgumentException
					|| ex is SecurityException
					|| ex is IOException
				)
				{
					throw new LoggerException("Failed to create log file: " + ex.Message);
				}
				else
				{
					// Unexpected failure
					throw;
				}
			}

			// For brevity, we'll only register for certain event types. Loggers can also
			// register to handle TargetStarted/Finished and other events.
			eventSource.ProjectStarted += new ProjectStartedEventHandler(eventSource_ProjectStarted);
			eventSource.TaskStarted += new TaskStartedEventHandler(eventSource_TaskStarted);
			eventSource.MessageRaised += new BuildMessageEventHandler(eventSource_MessageRaised);
			eventSource.WarningRaised += new BuildWarningEventHandler(eventSource_WarningRaised);
			eventSource.ErrorRaised += new BuildErrorEventHandler(eventSource_ErrorRaised);
			eventSource.ProjectFinished += new ProjectFinishedEventHandler(eventSource_ProjectFinished);
		}

		void eventSource_ErrorRaised(object sender, BuildErrorEventArgs e)
		{
			// BuildErrorEventArgs adds LineNumber, ColumnNumber, File, amongst other parameters
			string line = String.Format(": ERROR {0}({1},{2}): ", e.File, e.LineNumber, e.ColumnNumber);
			WriteLineWithSenderAndMessage(line, e);
		}
		
		void eventSource_WarningRaised(object sender, BuildWarningEventArgs e)
		{
			// BuildWarningEventArgs adds LineNumber, ColumnNumber, File, amongst other parameters
			string line = String.Format(": Warning {0}({1},{2}): ", e.File, e.LineNumber, e.ColumnNumber);
			WriteLineWithSenderAndMessage(line, e);
		}

		void eventSource_MessageRaised(object sender, BuildMessageEventArgs e)
		{
			// BuildMessageEventArgs adds Importance to BuildEventArgs
			// Let's take account of the verbosity setting we've been passed in deciding whether to log the message
			if ((e.Importance == MessageImportance.High && IsVerbosityAtLeast(LoggerVerbosity.Minimal))
				|| (e.Importance == MessageImportance.Normal && IsVerbosityAtLeast(LoggerVerbosity.Normal))
				|| (e.Importance == MessageImportance.Low && IsVerbosityAtLeast(LoggerVerbosity.Detailed))				
				)
			{
				WriteLineWithSenderAndMessage(String.Empty, e);
			}
		}

		void eventSource_TaskStarted(object sender, TaskStartedEventArgs e)
		{
			// TaskStartedEventArgs adds ProjectFile, TaskFile, TaskName
			// To keep this log clean, this logger will ignore these events.
		}
		
		void eventSource_ProjectStarted(object sender, ProjectStartedEventArgs e)
		{
			// ProjectStartedEventArgs adds ProjectFile, TargetNames
			// Just the regular message string is good enough here, so just display that.
			WriteLine(String.Empty, e);
			indent++;
		}

		void eventSource_ProjectFinished(object sender, ProjectFinishedEventArgs e)
		{
			// The regular message string is good enough here too.
			indent--;
			WriteLine(String.Empty, e);
		}
		
		/// <summary>
		/// Write a line to the log, adding the SenderName and Message
		/// (these parameters are on all MSBuild event argument objects)
		/// </summary>
		private void WriteLineWithSenderAndMessage(string line, BuildEventArgs e)
		{
			if (0 == String.Compare(e.SenderName, "MSBuild", true /*ignore case*/))
			{
				// Well, if the sender name is MSBuild, let's leave it out for prettiness
				WriteLine(line, e);
			}
			else
			{
				WriteLine(e.SenderName + ": " + line, e);
			}
		}
		
		/// <summary>
		/// Just write a line to the log
		/// </summary>
		private void WriteLine(string line, BuildEventArgs e)
		{
			for (int i = indent; i > 0; i--)
			{
				streamWriter.Write("\t");
			}
			streamWriter.WriteLine(line + e.Message);
		}
		
		/// <summary>
		/// Shutdown() is guaranteed to be called by MSBuild at the end of the build, after all 
		/// events have been raised.
		/// </summary>
		public override void Shutdown()
		{
			// Done logging, let go of the file
			streamWriter.Close();
		}

		private StreamWriter streamWriter;
		private int indent;
	}
}

Comentarios

Esta clase abstracta proporciona implementaciones predeterminadas para los métodos y propiedades de la ILogger interfaz.This abstract class provides default implementations for the methods and properties of the ILogger interface.

Solo se puede crear instancias de esta clase en un formulario derivado.This class can only be instantiated in a derived form.

Constructores

Logger() Logger() Logger() Logger()

Inicializa una nueva instancia de la clase Logger.Initializes a new instance of the Logger class.

Propiedades

Parameters Parameters Parameters Parameters

Obtiene o establece los parámetros definidos por el usuario del registrador.Gets or sets the user-defined parameters of the logger.

Verbosity Verbosity Verbosity Verbosity

Obtiene o establece el nivel de detalle que se mostrará en el registro de eventos.Gets or sets the level of detail to show in the event log.

Métodos

Equals(Object) Equals(Object) Equals(Object) Equals(Object)

Determina si el objeto especificado es igual al objeto actual.Determines whether the specified object is equal to the current object.

(Inherited from Object)
FormatErrorEvent(BuildErrorEventArgs) FormatErrorEvent(BuildErrorEventArgs) FormatErrorEvent(BuildErrorEventArgs) FormatErrorEvent(BuildErrorEventArgs)

Genera un mensaje de error con formato predeterminado a partir de un objeto BuildErrorEventArgs.Generates an error message that is in the default format, from a BuildErrorEventArgs object.

FormatWarningEvent(BuildWarningEventArgs) FormatWarningEvent(BuildWarningEventArgs) FormatWarningEvent(BuildWarningEventArgs) FormatWarningEvent(BuildWarningEventArgs)

Genera un mensaje de advertencia con formato predeterminado a partir de un objeto BuildWarningEventArgs.Generates a warning message that is in the default format, from a BuildWarningEventArgs object.

GetHashCode() GetHashCode() GetHashCode() GetHashCode()

Sirve como la función hash predeterminada.Serves as the default hash function.

(Inherited from Object)
GetType() GetType() GetType() GetType()

Obtiene el Type de la instancia actual.Gets the Type of the current instance.

(Inherited from Object)
Initialize(IEventSource) Initialize(IEventSource) Initialize(IEventSource) Initialize(IEventSource)

Si se reemplaza en una clase derivada, suscribe el registrador a eventos específicos.When overridden in a derived class, subscribes the logger to specific events.

IsVerbosityAtLeast(LoggerVerbosity) IsVerbosityAtLeast(LoggerVerbosity) IsVerbosityAtLeast(LoggerVerbosity) IsVerbosityAtLeast(LoggerVerbosity)

Determina si la actual configuración de Verbosity es al menos el valor que se ha pasado.Determines whether the current Verbosity setting is at least the value that is passed in.

MemberwiseClone() MemberwiseClone() MemberwiseClone() MemberwiseClone()

Crea una copia superficial del objeto Object actual.Creates a shallow copy of the current Object.

(Inherited from Object)
Shutdown() Shutdown() Shutdown() Shutdown()

Si se reemplaza en una clase derivada, libera los recursos asignados al registrador en el momento de la inicialización o durante la compilación.When overridden in a derived class, releases the resources allocated to the logger at the time of initialization or during the build.

ToString() ToString() ToString() ToString()

Devuelve una cadena que representa el objeto actual.Returns a string that represents the current object.

(Inherited from Object)

Se aplica a