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Reporting.cpp
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Reporting.cpp
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/**@file Module for performance-reporting mechanisms. */
/*
* Copyright 2012, 2013, 2014 Range Networks, Inc.
*
* This software is distributed under the terms of the GNU Affero Public License.
* See the COPYING file in the main directory for details.
*
* This use of this software may be subject to additional restrictions.
* See the LEGAL file in the main directory for details.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "Reporting.h"
#include "Logger.h"
#include <stdio.h>
#include <string.h>
static const char* createReportingTable = {
"CREATE TABLE IF NOT EXISTS REPORTING ("
"NAME TEXT UNIQUE NOT NULL, "
"VALUE INTEGER DEFAULT 0, "
"CLEAREDTIME INTEGER NOT NULL, "
"UPDATETIME INTEGER DEFAULT 0 "
")"
};
ReportingTable::ReportingTable(const char* filename)
{
gLogEarly(LOG_INFO | mFacility, "opening reporting table from path %s", filename);
// Connect to the database.
int rc = sqlite3_open(filename,&mDB);
if (rc) {
gLogEarly(LOG_EMERG | mFacility, "cannot open reporting database at %s, error message: %s", filename, sqlite3_errmsg(mDB));
sqlite3_close(mDB);
mDB = NULL;
return;
}
// Create the table, if needed.
if (!sqlite3_command(mDB,createReportingTable)) {
gLogEarly(LOG_EMERG | mFacility, "cannot create reporting table in database at %s, error message: %s", filename, sqlite3_errmsg(mDB));
}
// Set high-concurrency WAL mode.
if (!sqlite3_command(mDB,enableWAL)) {
gLogEarly(LOG_EMERG | mFacility, "Cannot enable WAL mode on database at %s, error message: %s", filename, sqlite3_errmsg(mDB));
}
// Start the commit thread
mBatchCommitter.start((void*(*)(void*))reportingBatchCommitter,NULL);
}
bool ReportingTable::create(const char* paramName)
{
// add this report name to the batch map
mLock.lock();
if (mBatch.find(paramName) == mBatch.end()) {
mBatch[paramName] = 0;
}
mLock.unlock();
// and to the database
char cmd[200];
sprintf(cmd,"INSERT OR IGNORE INTO REPORTING (NAME,CLEAREDTIME) VALUES (\"%s\",%ld)", paramName, time(NULL));
if (!sqlite3_command(mDB,cmd)) {
gLogEarly(LOG_CRIT|mFacility, "cannot create reporting parameter %s, error message: %s", paramName, sqlite3_errmsg(mDB));
return false;
}
return true;
}
bool ReportingTable::incr(const char* paramName)
{
mLock.lock();
mBatch[paramName]++;
mLock.unlock();
return true;
}
bool ReportingTable::max(const char* paramName, unsigned newVal)
{
char cmd[200];
sprintf(cmd,"UPDATE REPORTING SET VALUE=MAX(VALUE,%u), UPDATETIME=%ld WHERE NAME=\"%s\"", newVal, time(NULL), paramName);
if (!sqlite3_command(mDB,cmd)) {
gLogEarly(LOG_CRIT|mFacility, "cannot maximize reporting parameter %s, error message: %s", paramName, sqlite3_errmsg(mDB));
return false;
}
return true;
}
bool ReportingTable::clear(const char* paramName)
{
char cmd[200];
sprintf(cmd,"UPDATE REPORTING SET VALUE=0, UPDATETIME=0, CLEAREDTIME=%ld WHERE NAME=\"%s\"", time(NULL), paramName);
if (!sqlite3_command(mDB,cmd)) {
gLogEarly(LOG_CRIT|mFacility, "cannot clear reporting parameter %s, error message: %s", paramName, sqlite3_errmsg(mDB));
return false;
}
return true;
}
bool ReportingTable::clear()
{
char cmd[200];
sprintf(cmd,"UPDATE REPORTING SET VALUE=0, UPDATETIME=0, CLEAREDTIME=%ld", time(NULL));
if (!sqlite3_command(mDB,cmd)) {
gLogEarly(LOG_CRIT|mFacility, "cannot clear reporting table, error message: %s", sqlite3_errmsg(mDB));
return false;
}
return true;
}
bool ReportingTable::create(const char* baseName, unsigned minIndex, unsigned maxIndex)
{
size_t sz = strlen(baseName);
for (unsigned i = minIndex; i<=maxIndex; i++) {
char name[sz+10];
sprintf(name,"%s.%u",baseName,i);
if (!create(name)) return false;
}
return true;
}
bool ReportingTable::incr(const char* baseName, unsigned index)
{
char name[strlen(baseName)+10];
sprintf(name,"%s.%u",baseName,index);
return incr(name);
}
bool ReportingTable::max(const char* baseName, unsigned index, unsigned newVal)
{
char name[strlen(baseName)+10];
sprintf(name,"%s.%u",baseName,index);
return max(name,newVal);
}
bool ReportingTable::clear(const char* baseName, unsigned index)
{
char name[strlen(baseName)+10];
sprintf(name,"%s.%u",baseName,index);
return clear(name);
}
bool ReportingTable::commit()
{
ReportBatch oustanding;
ReportBatch::iterator mp;
unsigned oustandingCount = 0;
// copy out to free up access to mBatch as quickly as possible
mLock.lock();
mp = mBatch.begin();
while (mp != mBatch.end()) {
if (mp->second > 0) {
oustanding[mp->first] = mp->second;
mBatch[mp->first] = 0;
oustandingCount++;
}
mp++;
}
mLock.unlock();
// now actually write them into the db if needed
if (oustandingCount > 0) {
Timeval timer;
char cmd[200];
// TODO : could wrap this in a BEGIN; COMMIT; pair to transactionize these X UPDATEs
mp = oustanding.begin();
while (mp != oustanding.end()) {
sprintf(cmd,"UPDATE REPORTING SET VALUE=VALUE+%u, UPDATETIME=%ld WHERE NAME=\"%s\"", mp->second, time(NULL), mp->first.c_str());
if (!sqlite3_command(mDB,cmd)) {
LOG(CRIT) << "could not increment reporting parameter " << mp->first << ", error message: " << sqlite3_errmsg(mDB);
}
mp++;
}
LOG(INFO) << "wrote " << oustandingCount << " entries in " << timer.elapsed() << "ms";
}
return true;
}
extern ReportingTable gReports;
void* reportingBatchCommitter(void*)
{
gReports.mReportRunning = true;
while (gReports.mReportRunning) {
sleep(10);
gReports.commit();
}
return NULL;
}