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#include "logger.h"
#include <library/cpp/unified_agent_client/clock.h>
#include <library/cpp/unified_agent_client/helpers.h>
#include <library/cpp/logger/log.h>
#include <util/datetime/base.h>
#include <util/stream/str.h>
#include <util/system/getpid.h>
#include <util/system/thread.h>
namespace NUnifiedAgent {
namespace {
TString FormatLogLine(ELogPriority logLevel, const TStringBuf message, const TString& scope) {
TString result;
{
TStringOutput output(result);
output << FormatIsoLocal(TClock::Now())
<< " " << GetPID()
<< " " << TThread::CurrentThreadId()
<< " " << logLevel;
if (!scope.empty()) {
output << " " << scope;
}
output << " " << message << "\n";
}
return result;
}
}
TLogger::TThrottlerWithLock::TThrottlerWithLock(size_t rateLimitBytes)
: Throttler(rateLimitBytes, rateLimitBytes / 2)
, Lock()
{
}
bool TLogger::TThrottlerWithLock::TryConsume(double tokens) {
with_lock(Lock) {
return Throttler.TryConsume(tokens);
}
}
TLogger::TLogger(TLog& log, TFMaybe<size_t> rateLimitBytes)
: DefaultLogContext{log, log.IsNullLog() ? ELogPriority::TLOG_EMERG : log.FiltrationLevel()}
, TracingLogContexts()
, CurrentLogContext_()
, Errors(nullptr)
, DroppedBytes(nullptr)
, Throttler(rateLimitBytes.Defined() ? MakeHolder<TThrottlerWithLock>(*rateLimitBytes) : nullptr)
, Lock()
{
SetCurrentLogContext(DefaultLogContext);
}
void TLogger::SetCurrentLogContext(TLogContext& logContext) {
CurrentLogContext_.store(logContext.Log.IsNullLog() ? nullptr : &logContext, std::memory_order_release);
}
void TLogger::Log(TLog& log, ELogPriority logPriority, const TStringBuf message, const TString& scope) const {
try {
const auto logLine = FormatLogLine(logPriority, NUnifiedAgent::NPrivate::ReplaceNonUTF(message).Data, scope);
if (Throttler && &log == &DefaultLogContext.Log && !Throttler->TryConsume(logLine.size())) {
if (DroppedBytes) {
DroppedBytes->Add(logLine.size());
}
return;
}
log.Write(logPriority, logLine);
} catch (...) {
}
}
void TLogger::StartTracing(ELogPriority logPriority) noexcept {
with_lock(Lock) {
auto& logContext = GetOrCreateTracingLogContext(logPriority);
SetTracing(logContext, "started");
}
}
void TLogger::FinishTracing() noexcept {
with_lock(Lock) {
SetTracing(DefaultLogContext, "finished");
}
}
void TLogger::SetTracing(TLogContext& logContext, const char* action) {
// Lock must be held
SetCurrentLogContext(logContext);
Log(logContext.Log,
TLOG_INFO,
Sprintf("tracing %s, log priority is set to [%s]",
action, ToString(logContext.Priority).c_str()),
"");
}
auto TLogger::GetOrCreateTracingLogContext(ELogPriority logPriority) -> TLogContext& {
// Lock must be held
for (const auto& c: TracingLogContexts) {
if (c->Priority == logPriority) {
return *c;
}
}
auto newLogContext = MakeHolder<TLogContext>();
newLogContext->Log = TLog("cerr", logPriority);
newLogContext->Priority = logPriority;
auto* result = newLogContext.Get();
TracingLogContexts.push_back(std::move(newLogContext));
return *result;
}
TScopeLogger::TScopeLogger()
: Logger(nullptr)
, Scope()
, Errors(nullptr)
{
}
TScopeLogger::TScopeLogger(TLogger* logger,
const TString& scope,
NMonitoring::TDeprecatedCounter* errors)
: Logger(logger)
, Scope(scope)
, Errors(errors)
{
}
}
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