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/******************************************************************************
*
* package: Log4Qt
* file: appenderattachable.cpp
* created: Dezember 2010
* author: Andreas Bacher
*
*
* Copyright 2007 Andreas Bacher
*
* 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 "helpers/appenderattachable.h"
#include "varia/listappender.h"
#include "appender.h"
#include <QtCore/QDebug>
namespace Log4Qt
{
/**************************************************************************
* Declarations
**************************************************************************/
/**************************************************************************
* C helper functions
**************************************************************************/
/**************************************************************************
* Class implementation: Filter
**************************************************************************/
AppenderAttachable::AppenderAttachable() :
#if QT_VERSION < QT_VERSION_CHECK(4, 4, 0)
mAppenderGuard()
#else
mAppenderGuard(QReadWriteLock::Recursive)
#endif
{
}
QList<Appender *> AppenderAttachable::appenders() const
{
QReadLocker locker(&mAppenderGuard);
QList<Appender *> result;
Appender *p_appender;
Q_FOREACH(p_appender, mAppenders)
result << p_appender;
return result;
}
void AppenderAttachable::addAppender(Appender *pAppender)
{
// Avoid deadlock:
// - Handle warnings, before write lock is aquired
// Keep objects with a 0 reference count safe
LogObjectPtr < Appender > p_appender = pAppender;
{
QReadLocker locker(&mAppenderGuard);
if (!p_appender) {
//logger()->warn("Adding null Appender to Logger '%1'", name());
return;
}
if (mAppenders.contains(p_appender)) {
//logger()->warn("Adding of duplicate appender '%2' to logger '%1'",
//name(), p_appender->name());
return;
}
}
{
QWriteLocker locker(&mAppenderGuard);
if (mAppenders.contains(p_appender))
return;
mAppenders.append(p_appender);
}
}
Appender *AppenderAttachable::appender(const QString &rName) const
{
QReadLocker locker(&mAppenderGuard);
Appender *p_appender;
Q_FOREACH(p_appender, mAppenders)
if (p_appender->name() == rName)
return p_appender;
return 0;
}
bool AppenderAttachable::isAttached(Appender *pAppender) const
{
QReadLocker locker(&mAppenderGuard);
// Keep objects with a 0 reference count safe
LogObjectPtr < Appender > p_appender = pAppender;
return mAppenders.contains(p_appender);
}
void AppenderAttachable::removeAllAppenders()
{
// Avoid deadlock:
// - Only log warnings without having the write log aquired
// - Hold a reference to all appenders so that the remove does not
// destruct the appender over the reference count while the write
// log is held. The appender may log messages.
//logger()->trace("Removing all appenders from logger '%1'", name());
QList < LogObjectPtr<Appender> > appenders;
{
QWriteLocker locker(&mAppenderGuard);
QMutableListIterator < LogObjectPtr<Appender> > i(mAppenders);
while (i.hasNext()) {
Appender *p_appender = i.next();
ListAppender *p_listappender = qobject_cast<ListAppender*> (p_appender);
if (p_listappender && p_listappender->configuratorList())
continue;
else {
appenders << p_appender;
i.remove();
}
}
}
appenders.clear();
}
void AppenderAttachable::removeAppender(Appender *pAppender)
{
// Avoid deadlock:
// - Only log warnings without having the write log aquired
// - Hold a reference to the appender so that the remove does not
// destruct the appender over the reference count while the write
// log is held. The appender may log messages.
LogObjectPtr < Appender > p_appender = pAppender;
if (!p_appender) {
//logger()->warn("Request to remove null Appender from Logger '%1'", name());
return;
}
int n;
{
QWriteLocker locker(&mAppenderGuard);
n = mAppenders.removeAll(p_appender);
}
if (n == 0) {
//logger()->warn(
// "Request to remove Appender '%2', which is not part of Logger '%1' appenders",
// name(), p_appender->name());
return;
}
}
void AppenderAttachable::removeAppender(const QString &rName)
{
Appender *p_appender = appender(rName);
if (p_appender)
removeAppender(p_appender);
}
/**************************************************************************
* Implementation: Operators, Helper
**************************************************************************/
} // namespace Log4Qt
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