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/*
* Copyright (C) 2019 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include <wtf/Algorithms.h>
#include <wtf/HashSet.h>
#include <wtf/Logger.h>
#include <wtf/Ref.h>
#include <wtf/RefPtr.h>
namespace WTF {
class AggregateLogger : public Logger {
WTF_MAKE_NONCOPYABLE(AggregateLogger);
public:
static Ref<AggregateLogger> create(const void* owner)
{
return adoptRef(*new AggregateLogger(owner));
}
void addLogger(const Logger& logger)
{
m_loggers.add(&logger);
}
void removeLogger(const Logger& logger)
{
m_loggers.remove(&logger);
}
template<typename... Arguments>
inline void logAlways(WTFLogChannel& channel, UNUSED_VARIADIC_PARAMS const Arguments&... arguments) const
{
#if RELEASE_LOG_DISABLED
// "Standard" WebCore logging goes to stderr, which is captured in layout test output and can generally be a problem
// on some systems, so don't allow it.
UNUSED_PARAM(channel);
#else
log(channel, WTFLogLevel::Always, arguments...);
#endif
}
template<typename... Arguments>
inline void error(WTFLogChannel& channel, const Arguments&... arguments) const
{
log(channel, WTFLogLevel::Error, arguments...);
}
template<typename... Arguments>
inline void warning(WTFLogChannel& channel, const Arguments&... arguments) const
{
log(channel, WTFLogLevel::Warning, arguments...);
}
template<typename... Arguments>
inline void info(WTFLogChannel& channel, const Arguments&... arguments) const
{
log(channel, WTFLogLevel::Info, arguments...);
}
template<typename... Arguments>
inline void debug(WTFLogChannel& channel, const Arguments&... arguments) const
{
log(channel, WTFLogLevel::Debug, arguments...);
}
inline bool willLog(const WTFLogChannel& channel, WTFLogLevel level) const
{
for (auto& loggers : m_loggers) {
if (!loggers->willLog(channel, level))
return false;
}
return true;
}
private:
AggregateLogger(const void* owner)
: Logger(owner)
{
}
template<typename... Argument>
inline void log(WTFLogChannel& channel, WTFLogLevel level, const Argument&... arguments) const
{
if (!willLog(channel, level))
return;
Logger::log(channel, level, arguments...);
for (const auto& logger : m_loggers) {
for (Observer& observer : logger->observers())
observer.didLogMessage(channel, level, { ConsoleLogValue<Argument>::toValue(arguments)... });
}
}
UncheckedKeyHashSet<RefPtr<const Logger>> m_loggers;
};
} // namespace WTF
using WTF::AggregateLogger;
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