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#pragma once
#include "log_iface.h"
#include <util/generic/vector.h>
#include <util/digest/murmur.h>
#include <util/random/easy.h>
namespace NActors {
namespace NLog {
inline const char* PriorityToString(EPrio priority) {
switch (priority) {
case EPrio::Emerg:
return "EMERG";
case EPrio::Alert:
return "ALERT";
case EPrio::Crit:
return "CRIT";
case EPrio::Error:
return "ERROR";
case EPrio::Warn:
return "WARN";
case EPrio::Notice:
return "NOTICE";
case EPrio::Info:
return "INFO";
case EPrio::Debug:
return "DEBUG";
case EPrio::Trace:
return "TRACE";
default:
return "UNKNOWN";
}
}
// You can structure your program to have multiple logical components.
// In this case you can set different log priorities for different
// components. And you can change component's priority while system
// is running. Suspect a component has a bug? Turn DEBUG priority level on
// for this component.
static const int InvalidComponent = -1;
// Functions converts EComponent id to string
using EComponentToStringFunc = std::function<const TString&(EComponent)>;
// Log settings
struct TComponentSettings {
union {
struct {
ui32 SamplingRate;
ui8 SamplingLevel;
ui8 Level;
} X;
ui64 Data;
} Raw;
TComponentSettings(TAtomicBase data) {
Raw.Data = (ui64)data;
}
TComponentSettings(ui8 level, ui8 samplingLevel, ui32 samplingRate) {
Raw.X.Level = level;
Raw.X.SamplingLevel = samplingLevel;
Raw.X.SamplingRate = samplingRate;
}
};
struct TSettings: public TThrRefBase {
public:
TActorId LoggerActorId;
EComponent LoggerComponent;
ui64 TimeThresholdMs;
ui64 BufferSizeLimitBytes;
bool AllowDrop;
TDuration ThrottleDelay;
TArrayHolder<TAtomic> ComponentInfo;
TVector<TString> ComponentNames;
EComponent MinVal;
EComponent MaxVal;
EComponent Mask;
EPriority DefPriority;
EPriority DefSamplingPriority;
ui32 DefSamplingRate;
bool UseLocalTimestamps;
enum ELogFormat {
PLAIN_FULL_FORMAT,
PLAIN_SHORT_FORMAT,
JSON_FORMAT
};
ELogFormat Format;
TString ShortHostName;
TString ClusterName;
TString MessagePrefix;
// The best way to provide minVal, maxVal and func is to have
// protobuf enumeration of components. In this case protoc
// automatically generates YOURTYPE_MIN, YOURTYPE_MAX and
// YOURTYPE_Name for you.
TSettings(const TActorId& loggerActorId, const EComponent loggerComponent,
EComponent minVal, EComponent maxVal, EComponentToStringFunc func,
EPriority defPriority, EPriority defSamplingPriority = PRI_DEBUG,
ui32 defSamplingRate = 0, ui64 timeThresholdMs = 1000, ui64 bufferSizeLimitBytes = 1024 * 1024 * 300);
TSettings(const TActorId& loggerActorId, const EComponent loggerComponent,
EPriority defPriority, EPriority defSamplingPriority = PRI_DEBUG,
ui32 defSamplingRate = 0, ui64 timeThresholdMs = 1000, ui64 bufferSizeLimitBytes = 1024 * 1024 * 300);
void Append(EComponent minVal, EComponent maxVal, EComponentToStringFunc func);
template <typename T>
void Append(T minVal, T maxVal, const TString& (*func)(T)) {
Append(
static_cast<EComponent>(minVal),
static_cast<EComponent>(maxVal),
[func](EComponent c) -> const TString& {
return func(static_cast<T>(c));
}
);
}
inline bool Satisfies(EPriority priority, EComponent component, ui64 sampleBy = 0) const {
// by using Mask we don't get outside of array boundaries
TComponentSettings settings = GetComponentSettings(component);
if (priority > settings.Raw.X.Level) {
if (priority > settings.Raw.X.SamplingLevel) {
return false; // priority > both levels ==> do not log
}
// priority <= sampling level ==> apply sampling
ui32 samplingRate = settings.Raw.X.SamplingRate;
if (samplingRate) {
ui32 samplingValue = sampleBy ? MurmurHash<ui32>((const char*)&sampleBy, sizeof(sampleBy))
: samplingRate != 1 ? RandomNumber<ui32>() : 0;
return (samplingValue % samplingRate == 0);
} else {
// sampling rate not set ==> do not log
return false;
}
} else {
// priority <= log level ==> log
return true;
}
}
inline TComponentSettings GetComponentSettings(EComponent component) const {
Y_VERIFY_DEBUG((component & Mask) == component);
// by using Mask we don't get outside of array boundaries
return TComponentSettings(AtomicGet(ComponentInfo[component & Mask]));
}
const char* ComponentName(EComponent component) const {
Y_VERIFY_DEBUG((component & Mask) == component);
return ComponentNames[component & Mask].data();
}
int SetLevel(EPriority priority, EComponent component, TString& explanation);
int SetSamplingLevel(EPriority priority, EComponent component, TString& explanation);
int SetSamplingRate(ui32 sampling, EComponent component, TString& explanation);
EComponent FindComponent(const TStringBuf& componentName) const;
static int PowerOf2Mask(int val);
static bool IsValidPriority(EPriority priority);
bool IsValidComponent(EComponent component);
void SetAllowDrop(bool val);
void SetThrottleDelay(TDuration value);
void SetUseLocalTimestamps(bool value);
private:
int SetLevelImpl(
const TString& name, bool isSampling,
EPriority priority, EComponent component, TString& explanation);
};
}
}
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