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99 lines
4.2 KiB
C++
99 lines
4.2 KiB
C++
// Copyright (c) 2013, Razvan Petru
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// All rights reserved.
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// Redistribution and use in source and binary forms, with or without modification,
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// are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright notice, this
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// list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice, this
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// list of conditions and the following disclaimer in the documentation and/or other
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// materials provided with the distribution.
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// * The name of the contributors may not be used to endorse or promote products
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// derived from this software without specific prior written permission.
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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// IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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// OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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// OF THE POSSIBILITY OF SUCH DAMAGE.
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#include "QsLog.h"
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#include "QsLogDest.h"
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#include "log_example_shared.h"
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#include <QLibrary>
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#include <QCoreApplication>
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#include <QDir>
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#include <iostream>
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void logFunction(const QString &message, QsLogging::Level level)
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{
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std::cout << "From log function: " << qPrintable(message) << " " << static_cast<int>(level)
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<< std::endl;
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}
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// This small example shows how QsLog can be used inside a project.
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int main(int argc, char *argv[])
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{
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QCoreApplication a(argc, argv);
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using namespace QsLogging;
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// 1. init the logging mechanism
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Logger& logger = Logger::instance();
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logger.setLoggingLevel(QsLogging::TraceLevel);
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const QString sLogPath(QDir(a.applicationDirPath()).filePath("log.txt"));
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// 2. add two destinations
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DestinationPtr fileDestination(DestinationFactory::MakeFileDestination(
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sLogPath, EnableLogRotation, MaxSizeBytes(512), MaxOldLogCount(2)));
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DestinationPtr debugDestination(DestinationFactory::MakeDebugOutputDestination());
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DestinationPtr functorDestination(DestinationFactory::MakeFunctorDestination(&logFunction));
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logger.addDestination(debugDestination);
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logger.addDestination(fileDestination);
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logger.addDestination(functorDestination);
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// 3. start logging
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QLOG_INFO() << "Program started";
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QLOG_INFO() << "Built with Qt" << QT_VERSION_STR << "running on" << qVersion();
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QLOG_TRACE() << "Here's a" << QString::fromUtf8("trace") << "message";
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QLOG_DEBUG() << "Here's a" << static_cast<int>(QsLogging::DebugLevel) << "message";
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QLOG_WARN() << "Uh-oh!";
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qDebug() << "This message won't be picked up by the logger";
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QLOG_ERROR() << "An error has occurred";
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qWarning() << "Neither will this one";
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QLOG_FATAL() << "Fatal error!";
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logger.setLoggingLevel(QsLogging::OffLevel);
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for (int i = 0;i < 10000000;++i) {
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QLOG_ERROR() << QString::fromUtf8("this message should not be visible");
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}
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logger.setLoggingLevel(QsLogging::TraceLevel);
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// 4. log from a shared library - should automatically share the same log instance as above
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QLibrary myLib("log_example_shared");
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typedef LogExampleShared* (*LogExampleGetter)();
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typedef void(*LogExampleDeleter)(LogExampleShared*);
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LogExampleGetter fLogCreator = (LogExampleGetter) myLib.resolve("createExample");
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LogExampleDeleter fLogDeleter = (LogExampleDeleter)myLib.resolve("destroyExample");
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LogExampleShared *logFromShared = 0;
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if (fLogCreator && fLogDeleter) {
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logFromShared = fLogCreator();
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logFromShared->logSomething();
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fLogDeleter(logFromShared);
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} else if (!fLogCreator || !fLogDeleter) {
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QLOG_ERROR() << "could not resolve shared library function(s)";
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}
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QLOG_DEBUG() << "Program ending";
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QsLogging::Logger::destroyInstance();
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return 0;
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}
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