1 files changed, 326 insertions, 0 deletions
diff --git a/lib/base/logger.cpp b/lib/base/logger.cpp
new file mode 100644
index 0000000..38a2c67
--- /dev/null
+++ b/lib/base/logger.cpp
@@ -0,0 +1,326 @@
+/* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
+
+#include "base/logger.hpp"
+#include "base/logger-ti.cpp"
+#include "base/application.hpp"
+#include "base/streamlogger.hpp"
+#include "base/configtype.hpp"
+#include "base/utility.hpp"
+#include "base/objectlock.hpp"
+#include "base/context.hpp"
+#include "base/scriptglobal.hpp"
+#ifdef _WIN32
+#include "base/windowseventloglogger.hpp"
+#endif /* _WIN32 */
+#include <algorithm>
+#include <iostream>
+#include <utility>
+
+using namespace icinga;
+
+template Log& Log::operator<<(const Value&);
+template Log& Log::operator<<(const String&);
+template Log& Log::operator<<(const std::string&);
+template Log& Log::operator<<(const bool&);
+template Log& Log::operator<<(const unsigned int&);
+template Log& Log::operator<<(const int&);
+template Log& Log::operator<<(const unsigned long&);
+template Log& Log::operator<<(const long&);
+template Log& Log::operator<<(const double&);
+
+REGISTER_TYPE(Logger);
+
+std::set<Logger::Ptr> Logger::m_Loggers;
+std::mutex Logger::m_Mutex;
+bool Logger::m_ConsoleLogEnabled = true;
+std::atomic<bool> Logger::m_EarlyLoggingEnabled (true);
+bool Logger::m_TimestampEnabled = true;
+LogSeverity Logger::m_ConsoleLogSeverity = LogInformation;
+std::mutex Logger::m_UpdateMinLogSeverityMutex;
+Atomic<LogSeverity> Logger::m_MinLogSeverity (LogDebug);
+
+INITIALIZE_ONCE([]() {
+	ScriptGlobal::Set("System.LogDebug", LogDebug);
+	ScriptGlobal::Set("System.LogNotice", LogNotice);
+	ScriptGlobal::Set("System.LogInformation", LogInformation);
+	ScriptGlobal::Set("System.LogWarning", LogWarning);
+	ScriptGlobal::Set("System.LogCritical", LogCritical);
+});
+
+/**
+ * Constructor for the Logger class.
+ */
+void Logger::Start(bool runtimeCreated)
+{
+	ObjectImpl<Logger>::Start(runtimeCreated);
+
+	{
+		std::unique_lock<std::mutex> lock(m_Mutex);
+		m_Loggers.insert(this);
+	}
+
+	UpdateMinLogSeverity();
+}
+
+void Logger::Stop(bool runtimeRemoved)
+{
+	{
+		std::unique_lock<std::mutex> lock(m_Mutex);
+		m_Loggers.erase(this);
+	}
+
+	UpdateMinLogSeverity();
+
+	ObjectImpl<Logger>::Stop(runtimeRemoved);
+}
+
+std::set<Logger::Ptr> Logger::GetLoggers()
+{
+	std::unique_lock<std::mutex> lock(m_Mutex);
+	return m_Loggers;
+}
+
+/**
+ * Retrieves the minimum severity for this logger.
+ *
+ * @returns The minimum severity.
+ */
+LogSeverity Logger::GetMinSeverity() const
+{
+	String severity = GetSeverity();
+	if (severity.IsEmpty())
+		return LogInformation;
+	else {
+		LogSeverity ls = LogInformation;
+
+		try {
+			ls = Logger::StringToSeverity(severity);
+		} catch (const std::exception&) { /* use the default level */ }
+
+		return ls;
+	}
+}
+
+/**
+ * Converts a severity enum value to a string.
+ *
+ * @param severity The severity value.
+ */
+String Logger::SeverityToString(LogSeverity severity)
+{
+	switch (severity) {
+		case LogDebug:
+			return "debug";
+		case LogNotice:
+			return "notice";
+		case LogInformation:
+			return "information";
+		case LogWarning:
+			return "warning";
+		case LogCritical:
+			return "critical";
+		default:
+			BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid severity."));
+	}
+}
+
+/**
+ * Converts a string to a severity enum value.
+ *
+ * @param severity The severity.
+ */
+LogSeverity Logger::StringToSeverity(const String& severity)
+{
+	if (severity == "debug")
+		return LogDebug;
+	else if (severity == "notice")
+		return LogNotice;
+	else if (severity == "information")
+		return LogInformation;
+	else if (severity == "warning")
+		return LogWarning;
+	else if (severity == "critical")
+		return LogCritical;
+	else
+		BOOST_THROW_EXCEPTION(std::invalid_argument("Invalid severity: " + severity));
+}
+
+void Logger::DisableConsoleLog()
+{
+	m_ConsoleLogEnabled = false;
+
+	UpdateMinLogSeverity();
+}
+
+void Logger::EnableConsoleLog()
+{
+	m_ConsoleLogEnabled = true;
+
+	UpdateMinLogSeverity();
+}
+
+bool Logger::IsConsoleLogEnabled()
+{
+	return m_ConsoleLogEnabled;
+}
+
+void Logger::SetConsoleLogSeverity(LogSeverity logSeverity)
+{
+	m_ConsoleLogSeverity = logSeverity;
+}
+
+LogSeverity Logger::GetConsoleLogSeverity()
+{
+	return m_ConsoleLogSeverity;
+}
+
+void Logger::DisableEarlyLogging() {
+	m_EarlyLoggingEnabled = false;
+
+	UpdateMinLogSeverity();
+}
+
+bool Logger::IsEarlyLoggingEnabled() {
+	return m_EarlyLoggingEnabled;
+}
+
+void Logger::DisableTimestamp()
+{
+	m_TimestampEnabled = false;
+}
+
+void Logger::EnableTimestamp()
+{
+	m_TimestampEnabled = true;
+}
+
+bool Logger::IsTimestampEnabled()
+{
+	return m_TimestampEnabled;
+}
+
+void Logger::SetSeverity(const String& value, bool suppress_events, const Value& cookie)
+{
+	ObjectImpl<Logger>::SetSeverity(value, suppress_events, cookie);
+
+	UpdateMinLogSeverity();
+}
+
+void Logger::ValidateSeverity(const Lazy<String>& lvalue, const ValidationUtils& utils)
+{
+	ObjectImpl<Logger>::ValidateSeverity(lvalue, utils);
+
+	try {
+		StringToSeverity(lvalue());
+	} catch (...) {
+		BOOST_THROW_EXCEPTION(ValidationError(this, { "severity" }, "Invalid severity specified: " + lvalue()));
+	}
+}
+
+void Logger::UpdateMinLogSeverity()
+{
+	std::unique_lock<std::mutex> lock (m_UpdateMinLogSeverityMutex);
+	auto result (LogNothing);
+
+	for (auto& logger : Logger::GetLoggers()) {
+		ObjectLock llock (logger);
+
+		if (logger->IsActive()) {
+			result = std::min(result, logger->GetMinSeverity());
+		}
+	}
+
+	if (Logger::IsConsoleLogEnabled()) {
+		result = std::min(result, Logger::GetConsoleLogSeverity());
+	}
+
+#ifdef _WIN32
+	if (Logger::IsEarlyLoggingEnabled()) {
+		result = std::min(result, LogCritical);
+	}
+#endif /* _WIN32 */
+
+	m_MinLogSeverity.store(result);
+}
+
+Log::Log(LogSeverity severity, String facility, const String& message)
+	: Log(severity, std::move(facility))
+{
+	if (!m_IsNoOp) {
+		m_Buffer << message;
+	}
+}
+
+Log::Log(LogSeverity severity, String facility)
+	: m_Severity(severity), m_Facility(std::move(facility)), m_IsNoOp(severity < Logger::GetMinLogSeverity())
+{ }
+
+/**
+ * Writes the message to the application's log.
+ */
+Log::~Log()
+{
+	if (m_IsNoOp) {
+		return;
+	}
+
+	LogEntry entry;
+	entry.Timestamp = Utility::GetTime();
+	entry.Severity = m_Severity;
+	entry.Facility = m_Facility;
+
+	{
+		auto msg (m_Buffer.str());
+		msg.erase(msg.find_last_not_of("\n") + 1u);
+
+		entry.Message = std::move(msg);
+	}
+
+	if (m_Severity >= LogWarning) {
+		ContextTrace context;
+
+		if (context.GetLength() > 0) {
+			std::ostringstream trace;
+			trace << context;
+			entry.Message += "\nContext:" + trace.str();
+		}
+	}
+
+	for (const Logger::Ptr& logger : Logger::GetLoggers()) {
+		ObjectLock llock(logger);
+
+		if (!logger->IsActive())
+			continue;
+
+		if (entry.Severity >= logger->GetMinSeverity())
+			logger->ProcessLogEntry(entry);
+
+#ifdef I2_DEBUG /* I2_DEBUG */
+		/* Always flush, don't depend on the timer. Enable this for development sprints on Linux/macOS only. Windows crashes. */
+		//logger->Flush();
+#endif /* I2_DEBUG */
+	}
+
+	if (Logger::IsConsoleLogEnabled() && entry.Severity >= Logger::GetConsoleLogSeverity()) {
+		StreamLogger::ProcessLogEntry(std::cout, entry);
+
+		/* "Console" might be a pipe/socket (systemd, daemontools, docker, ...),
+		 * then cout will not flush lines automatically. */
+		std::cout << std::flush;
+	}
+
+#ifdef _WIN32
+	if (Logger::IsEarlyLoggingEnabled() && entry.Severity >= LogCritical) {
+		WindowsEventLogLogger::WriteToWindowsEventLog(entry);
+	}
+#endif /* _WIN32 */
+}
+
+Log& Log::operator<<(const char *val)
+{
+	if (!m_IsNoOp) {
+		m_Buffer << val;
+	}
+
+	return *this;
+}