Included Log4Qt in project

1 files changed, 269 insertions, 0 deletions

diff --git a/ext/Log4Qt/src/appenderskeleton.cpp b/ext/Log4Qt/src/appenderskeleton.cpp
new file mode 100644
index 0000000..78be62c
--- /dev/null
+++ b/ext/Log4Qt/src/appenderskeleton.cpp
@@ -0,0 +1,269 @@
+/******************************************************************************
+ *
+ * package:
+ * file:        appenderskeleton.cpp
+ * created:     September 2007
+ * author:      Martin Heinrich
+ *
+ *
+ * Copyright 2007 Martin Heinrich
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ ******************************************************************************/
+
+
+
+/******************************************************************************
+ * Dependencies
+ ******************************************************************************/
+
+
+#include "appenderskeleton.h"
+
+#include <QtCore/QDebug>
+#include "layout.h"
+#include "loggingevent.h"
+#include "logmanager.h"
+#include "spi/filter.h"
+
+
+namespace Log4Qt
+{
+
+
+	/**************************************************************************
+	* Declarations
+	***************************************************************************/
+
+
+	/*!
+	 * \brief The class RecursionGuardLocker controls a boolean flag.
+	 *
+	 * It is a helper class to control a boolean flag. The class sets the flag
+	 * on creation and resets it on destruction.
+	 */
+	class RecursionGuardLocker
+	{
+	public:
+			RecursionGuardLocker(bool *pGuard);
+			~RecursionGuardLocker();
+	private:
+			RecursionGuardLocker(const RecursionGuardLocker &rOther); // Not implemented
+			RecursionGuardLocker &operator=(const RecursionGuardLocker &rOther); // Not implemented
+	private:
+		bool *mpGuard;
+	};
+
+
+
+	/**************************************************************************
+	 * C helper functions
+	 **************************************************************************/
+
+
+
+	/**************************************************************************
+	 * Class implementation: RecursionGuardLocker
+	***************************************************************************/
+
+
+	inline RecursionGuardLocker::RecursionGuardLocker(bool *pGuard)
+	{
+			Q_ASSERT_X(pGuard != 0, "RecursionGuardLocker::RecursionGuardLocker()", "Pointer to guard bool must not be null");
+
+			mpGuard = pGuard;
+			*mpGuard = true;
+	}
+
+
+	inline RecursionGuardLocker::~RecursionGuardLocker()
+	{
+			*mpGuard = false;
+	}
+
+
+	/**************************************************************************
+	 * Class implementation: AppenderSkeleton
+	 **************************************************************************/
+
+
+	AppenderSkeleton::AppenderSkeleton(QObject *pParent) :
+			Appender(pParent),
+			mObjectGuard(QMutex::Recursive), // Recursive for doAppend()
+			mAppendRecursionGuard(false),
+			mIsActive(true),
+			mIsClosed(false),
+			mpLayout(0),
+			mThreshold(Level::NULL_INT),
+		mpHeadFilter(0),
+		mpTailFilter(0)
+	{
+	}
+
+
+    AppenderSkeleton::AppenderSkeleton(const bool isActive,
+																		 QObject *pParent) :
+			Appender(pParent),
+			mObjectGuard(QMutex::Recursive), // Recursive for doAppend()
+			mAppendRecursionGuard(false),
+			mIsActive(isActive),
+			mIsClosed(false),
+			mpLayout(0),
+			mThreshold(Level::NULL_INT),
+			mpHeadFilter(0),
+			mpTailFilter(0)
+	{
+	}
+
+
+	void AppenderSkeleton::activateOptions()
+	{
+			QMutexLocker locker(&mObjectGuard);
+
+			if (requiresLayout() && !layout())
+			{
+				LogError e = LOG4QT_QCLASS_ERROR(QT_TR_NOOP("Activation of appender '%1' that requires layout and has no layout set"),
+																		 APPENDER_ACTIVATE_MISSING_LAYOUT_ERROR);
+					e << name();
+					logger()->error(e);
+					return;
+			}
+			mIsActive = true;
+	}
+
+
+	void AppenderSkeleton::addFilter(Filter *pFilter)
+	{
+			if(!pFilter)
+			{
+					logger()->warn("Adding null Filter to Appender '%1'", name());
+					return;
+			}
+
+			QMutexLocker locker(&mObjectGuard);
+
+			mpTailFilter = pFilter;
+			if (mpHeadFilter)
+				mpHeadFilter->setNext(pFilter);
+			else
+				mpHeadFilter = pFilter;
+	}
+
+
+	void AppenderSkeleton::clearFilters()
+	{
+			QMutexLocker locker(&mObjectGuard);
+
+			mpTailFilter = 0;
+			mpHeadFilter = 0;
+	}
+
+
+	void AppenderSkeleton::close()
+	{
+			QMutexLocker locker(&mObjectGuard);
+
+			mIsClosed = true;
+			mIsActive = false;
+	}
+
+	void AppenderSkeleton::customEvent(QEvent* event)
+	{
+	  if (event->type() == LoggingEvent::eventId) {
+	    LoggingEvent *logEvent = static_cast<LoggingEvent*>(event);
+	    doAppend(*logEvent);
+	    return ;
+	  }
+	  QObject::customEvent(event);
+	}
+
+    void AppenderSkeleton::doAppend(const LoggingEvent &rEvent)
+    {
+        // The mutex serialises concurrent access from multiple threads.
+        // - e.g. two threads using the same logger
+        // - e.g. two threads using different logger with the same appender
+        //
+        // A call from the same thread will pass the mutex (QMutex::Recursive)
+        // and get to the recursion guard. The recursion guard blocks recursive
+        // invocation and prevents a possible endless loop.
+        // - e.g. an appender logs an error with a logger that uses it
+
+        QMutexLocker locker(&mObjectGuard);
+
+        if (mAppendRecursionGuard)
+            return;
+
+        RecursionGuardLocker recursion_locker(&mAppendRecursionGuard);
+
+        if (!checkEntryConditions())
+            return;
+        if (!isAsSevereAsThreshold(rEvent.level()))
+            return;
+
+        Filter *p_filter = mpHeadFilter;
+        while(p_filter)
+        {
+            Filter::Decision decision = p_filter->decide(rEvent);
+            if (decision == Filter::ACCEPT)
+                break;
+            else if (decision == Filter::DENY)
+                return;
+            else
+                p_filter = p_filter->next();
+        }
+
+        append(rEvent);
+    }
+
+
+	bool AppenderSkeleton::checkEntryConditions() const
+	{
+			// Q_ASSERT_X(, "WriterAppender::checkEntryConditions()", "Lock must be held by caller")
+
+			if (!isActive())
+			{
+					LogError e = LOG4QT_QCLASS_ERROR(QT_TR_NOOP("Use of non activated appender '%1'"),
+																						APPENDER_NOT_ACTIVATED_ERROR);
+					e << name();
+					logger()->error(e);
+					return false;
+			}
+			if (isClosed())
+			{
+					LogError e = LOG4QT_QCLASS_ERROR(QT_TR_NOOP("Use of closed appender '%1'"),
+																					 APPENDER_CLOSED_ERROR);
+					e << name();
+					logger()->error(e);
+					return false;
+			}
+			if (requiresLayout() && !layout())
+			{
+					LogError e = LOG4QT_QCLASS_ERROR(QT_TR_NOOP("Use of appender '%1' that requires layout and has no layout set"),
+																						 APPENDER_USE_MISSING_LAYOUT_ERROR);
+					e << name();
+					logger()->error(e);
+					return false;
+			}
+
+			return true;
+	}
+
+
+
+	/**************************************************************************
+	 * Implementation: Operators, Helper
+	 **************************************************************************/
+
+
+} // namespace Log4Qt