--- /dev/null
+<?php
+// Own namespace
+namespace Org\Mxchange\CoreFramework\Logging;
+
+// Import framework stuff
+use Org\Mxchange\CoreFramework\Generic\FrameworkInterface;
+
+/**
+ * A Logger interface
+ *
+ * @author Roland Haeder <webmaster@ship-simu.org>
+ * @version 0.0.0
+ * @copyright Copyright (c) 2007, 2008 Roland Haeder, 2009 - 2023 Core Developer Team
+ * @license GNU GPL 3.0 or any newer version
+ * @link http://www.ship-simu.org
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ */
+interface Logger extends FrameworkInterface {
+
+ // Logger levels
+ const LOGGER_LEVEL_DEBUG = 'DEBUG';
+ const LOGGER_LEVEL_DEPRECATED = 'DEPRECATED';
+ const LOGGER_LEVEL_INFO = 'INFO';
+ const LOGGER_LEVEL_TRACE = 'TRACE';
+ const LOGGER_LEVEL_WARNING = 'WARNING';
+
+ /**
+ * Outputs a trace message whether to debug instance (should be set!) or
+ * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
+ * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
+ *
+ * @param $message Message we shall send out...
+ * @param $doPrint Whether print or die here (default: print)
+ * @paran $stripTags Whether to strip tags (default: false)
+ * @return void
+ * @throws InvalidArgumentException If a parameter has an invalid value
+ * @throws NullPointerException If this->outputInstance is NULL
+ * @todo Remove $doPrint parameter
+ */
+ public function traceMessage (string $message, bool $doPrint = true, bool $stripTags = false);
+
+ /**
+ * Outputs a debug message whether to debug instance (should be set!) or
+ * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
+ * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
+ *
+ * @param $message Message we shall send out...
+ * @param $doPrint Whether print or die here (default: print)
+ * @paran $stripTags Whether to strip tags (default: false)
+ * @return void
+ * @throws InvalidArgumentException If a parameter has an invalid value
+ * @throws NullPointerException If this->outputInstance is NULL
+ * @todo Remove $doPrint parameter
+ */
+ public function debugMessage (string $message, bool $doPrint = true, bool $stripTags = false);
+
+ /**
+ * Outputs an informational message whether to debug instance (should be set!) or
+ * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
+ * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
+ *
+ * @param $message Message we shall send out...
+ * @param $doPrint Whether print or die here (default: print)
+ * @paran $stripTags Whether to strip tags (default: false)
+ * @return void
+ * @throws InvalidArgumentException If a parameter has an invalid value
+ * @throws NullPointerException If this->outputInstance is NULL
+ * @todo Remove $doPrint parameter
+ */
+ public function infoMessage (string $message, bool $doPrint = true, bool $stripTags = false);
+
+ /**
+ * Outputs a warning message whether to debug instance (should be set!) or
+ * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
+ * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
+ *
+ * @param $message Message we shall send out...
+ * @param $doPrint Whether print or die here (default: print)
+ * @paran $stripTags Whether to strip tags (default: false)
+ * @return void
+ * @throws InvalidArgumentException If a parameter has an invalid value
+ * @throws NullPointerException If this->outputInstance is NULL
+ * @todo Remove $doPrint parameter
+ */
+ public function warningMessage (string $message, bool $doPrint = true, bool $stripTags = false);
+
+ /**
+ * Output a partial stub message for the caller method
+ *
+ * @param $message An optional message to display
+ * @return void
+ */
+ public function partialStub (string $message = '');
+
+ /**
+ * Outputs a deprecated message whether to debug instance (should be set!) or
+ * dies with or ptints the message. Do NEVER EVER rewrite the exit() call to
+ * ApplicationEntryPoint::app_exit(), this would cause an endless loop.
+ *
+ * @param $message Message we shall send out...
+ * @param $doPrint Whether print or die here (default: print)
+ * @paran $stripTags Whether to strip tags (default: false)
+ * @return void
+ * @throws InvalidArgumentException If a parameter has an invalid value
+ * @throws NullPointerException If this->outputInstance is NULL
+ * @todo Remove $doPrint parameter
+ * @todo When all old method invocations are fixed, renamed this do deprecatedMessage
+ */
+ public function debugOutput (string $message, bool $doPrint = true, bool $stripTags = false);
+
+}