Implemented VirtualPrinterDriver project

Common/VirtualPrinter.Logging/IVirtualPrinterLogger.cs

@@ -0,0 +1,81 @@
+using System;
+
+using JetBrains.Annotations;
+
+namespace VirtualPrinter.Logging
+{
+    // ReSharper disable once UnusedTypeParameter
+    public interface IVirtualPrinterLogger<out T> : IVirtualPrinterLogger
+    { }
+
+    public interface IVirtualPrinterLogger
+    {
+        /// <summary>
+        /// Gets the name of the logger.
+        /// </summary>
+        string Name { get; }
+
+        /// <summary>
+        /// A value of true if logging is enabled for the Debug level, otherwise it returns false.
+        /// </summary>
+        bool IsDebugEnabled { get; }
+
+        /// <summary>
+        /// A value of true if logging is enabled for the Trace level, otherwise it returns false.
+        /// </summary>
+        bool IsTraceEnabled { get; }
+
+        /// <summary>
+        /// Writes the exception at the <c>Error</c> level.
+        /// </summary>
+        /// <param name="exception">An exception to be logged.</param>
+        void Error([CanBeNull]Exception exception);
+
+        /// <summary>
+        /// Writes the diagnostic message and exception at the <c>Error</c> level.
+        /// </summary>
+        /// <param name="exception">An exception to be logged.</param>
+        /// <param name="message">A <see langword="string" /> to be written.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Error([CanBeNull]Exception exception, [CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+
+        /// <summary>
+        /// Something failed; application may or may not continue
+        /// Writes the diagnostic message and exception at the <c>Error</c> level.
+        /// </summary>
+        /// <param name="message">A <see langword="string" /> to be written.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Error([CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+
+        /// <summary>
+        /// Something unexpected; application will continue
+        /// Writes the diagnostic message at the <c>Warn</c> level using the specified parameters.
+        /// </summary>
+        /// <param name="message">A <see langword="string" /> containing format items.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Warn([CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+
+        /// <summary>
+        /// Normal behavior like mail sent, user updated profile etc.
+        /// Writes the diagnostic message at the <c>Info</c> level using the specified parameters.
+        /// </summary>
+        /// <param name="message">A <see langword="string" /> containing format items.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Info([CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+
+        /// <summary>
+        /// For debugging; executed query, user authenticated, session expired
+        /// Writes the diagnostic message at the <c>Debug</c> level using the specified parameters.
+        /// </summary>
+        /// <param name="message">A <see langword="string" /> containing format items.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Debug([CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+
+        /// <summary>
+        /// Writes the diagnostic message at the <c>Trace</c> level using the specified parameters.
+        /// </summary>
+        /// <param name="message">A <see langword="string" /> containing format items.</param>
+        /// <param name="args">Arguments to format.</param>
+        void Trace([CanBeNull]string message, [CanBeNull, ItemCanBeNull]params object[] args);
+    }
+}