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/*
* Copyright (c) 2017-2019 Cisco and/or its affiliates.
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include <errno.h>
#include <src/config.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <parc/assert/parc_Assert.h>
#include <parc/algol/parc_Memory.h>
#include <parc/algol/parc_Object.h>
#include <parc/logging/parc_Log.h>
#include <src/core/forwarder.h>
#include <src/core/logger.h>
struct logger {
PARCClock *clock;
PARCLogReporter *reporter;
PARCLog *loggerArray[LoggerFacility_END];
};
static const struct facility_to_string {
LoggerFacility facility;
const char *string;
} _facilityToString[] = {
{.facility = LoggerFacility_Config, .string = "Config"},
{.facility = LoggerFacility_Core, .string = "Core"},
{.facility = LoggerFacility_IO, .string = "IO"},
{.facility = LoggerFacility_Message, .string = "Message"},
{.facility = LoggerFacility_Processor, .string = "Processor"},
{.facility = 0, .string = NULL}};
const char *logger_FacilityString(LoggerFacility facility) {
for (int i = 0; _facilityToString[i].string != NULL; i++) {
if (_facilityToString[i].facility == facility) {
return _facilityToString[i].string;
}
}
return "Unknown";
}
static void _allocateLoggers(Logger *logger, PARCLogReporter *reporter) {
parcTrapUnexpectedStateIf(
logger->reporter != NULL,
"Trying to allocate a reporter when the previous one is not null");
logger->reporter = parcLogReporter_Acquire(reporter);
char hostname[255];
int gotHostName = gethostname(hostname, 255);
if (gotHostName < 0) {
snprintf(hostname, 255, "unknown");
}
for (int i = 0; i < LoggerFacility_END; i++) {
logger->loggerArray[i] = parcLog_Create(hostname, logger_FacilityString(i),
"forwarder", logger->reporter);
parcLog_SetLevel(logger->loggerArray[i], PARCLogLevel_Error);
}
}
static void _releaseLoggers(Logger *logger) {
for (int i = 0; i < LoggerFacility_END; i++) {
parcLog_Release(&logger->loggerArray[i]);
}
parcLogReporter_Release(&logger->reporter);
}
static void _destroyer(Logger **loggerPtr) {
Logger *logger = *loggerPtr;
_releaseLoggers(logger);
parcClock_Release(&(*loggerPtr)->clock);
}
parcObject_ExtendPARCObject(Logger, _destroyer, NULL, NULL, NULL, NULL, NULL,
NULL);
parcObject_ImplementAcquire(logger, Logger);
parcObject_ImplementRelease(logger, Logger);
Logger *logger_Create(PARCLogReporter *reporter, const PARCClock *clock) {
parcAssertNotNull(reporter, "Parameter reporter must be non-null");
parcAssertNotNull(clock, "Parameter clock must be non-null");
Logger *logger = parcObject_CreateAndClearInstance(Logger);
if (logger) {
logger->clock = parcClock_Acquire(clock);
_allocateLoggers(logger, reporter);
}
return logger;
}
void logger_SetReporter(Logger *logger, PARCLogReporter *reporter) {
parcAssertNotNull(logger, "Parameter logger must be non-null");
// save the log level state
PARCLogLevel savedLevels[LoggerFacility_END];
for (int i = 0; i < LoggerFacility_END; i++) {
savedLevels[i] = parcLog_GetLevel(logger->loggerArray[i]);
}
_releaseLoggers(logger);
_allocateLoggers(logger, reporter);
// restore log level state
for (int i = 0; i < LoggerFacility_END; i++) {
parcLog_SetLevel(logger->loggerArray[i], savedLevels[i]);
}
}
void logger_SetClock(Logger *logger, PARCClock *clock) {
parcAssertNotNull(logger, "Parameter logger must be non-null");
parcClock_Release(&logger->clock);
logger->clock = parcClock_Acquire(clock);
}
static void _assertInvariants(const Logger *logger, LoggerFacility facility) {
parcAssertNotNull(logger, "Parameter logger must be non-null");
parcTrapOutOfBoundsIf(facility >= LoggerFacility_END, "Invalid facility %d",
facility);
}
void logger_SetLogLevel(Logger *logger, LoggerFacility facility,
PARCLogLevel minimumLevel) {
_assertInvariants(logger, facility);
PARCLog *log = logger->loggerArray[facility];
parcLog_SetLevel(log, minimumLevel);
}
bool logger_IsLoggable(const Logger *logger, LoggerFacility facility,
PARCLogLevel level) {
_assertInvariants(logger, facility);
PARCLog *log = logger->loggerArray[facility];
return parcLog_IsLoggable(log, level);
}
void logger_Log(Logger *logger, LoggerFacility facility, PARCLogLevel level,
const char *module, const char *format, ...) {
if (logger_IsLoggable(logger, facility, level)) {
// this is logged as the messageid
uint64_t logtime = parcClock_GetTime(logger->clock);
// logger_IsLoggable asserted invariants so we know facility is in bounds
PARCLog *log = logger->loggerArray[facility];
va_list va;
va_start(va, format);
parcLog_MessageVaList(log, level, logtime, format, va);
va_end(va);
}
}
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