| /* |
| * Copyright 2009, 2010 Free Software Foundation, Inc. |
| * Copyright 2010 Kestrel Signal Processing, 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 <string.h> |
| #include <cstdio> |
| #include <fstream> |
| #include <string> |
| |
| #include "Configuration.h" |
| #include "Logger.h" |
| |
| |
| using namespace std; |
| |
| // Reference to a global config table, used all over the system. |
| extern ConfigurationTable gConfig; |
| |
| |
| /**@ The global alarms table. */ |
| //@{ |
| Mutex alarmsLock; |
| list<string> alarmsList; |
| void addAlarm(const string&); |
| //@} |
| |
| |
| |
| |
| /** Names of the logging levels. */ |
| const char *levelNames[] = { |
| "EMERG", "ALERT", "CRIT", "ERR", "WARNING", "NOTICE", "INFO", "DEBUG" |
| }; |
| int numLevels = 8; |
| |
| |
| /** Given a string, return the corresponding level name. */ |
| int lookupLevel(const string& name) |
| { |
| // Reverse search, since the numerically larger levels are more common. |
| for (int i=numLevels-1; i>=0; i--) { |
| if (name == levelNames[i]) return i; |
| } |
| // This should never be called with a bogus name. |
| LOG(ERR) << "undefined logging level " << name << "defaulting to ERR"; |
| return LOG_ERR; |
| } |
| |
| |
| int getLoggingLevel(const char* filename) |
| { |
| // Default level? |
| if (!filename) return lookupLevel(gConfig.getStr("Log.Level")); |
| |
| // This can afford to be inefficient since it is not called that often. |
| const string keyName = string("Log.Level.") + string(filename); |
| if (gConfig.defines(keyName)) return lookupLevel(gConfig.getStr(keyName)); |
| return lookupLevel(gConfig.getStr("Log.Level")); |
| } |
| |
| |
| |
| int gGetLoggingLevel(const char* filename) |
| { |
| // This is called a lot and needs to be efficient. |
| |
| static Mutex sLogCacheLock; |
| static map<uint64_t,int> sLogCache; |
| static unsigned sCacheCount; |
| static const unsigned sCacheRefreshCount = 1000; |
| |
| if (filename==NULL) return gGetLoggingLevel(""); |
| |
| HashString hs(filename); |
| uint64_t key = hs.hash(); |
| |
| sLogCacheLock.lock(); |
| // Time for a cache flush? |
| if (sCacheCount>sCacheRefreshCount) { |
| sLogCache.clear(); |
| sCacheCount=0; |
| } |
| // Is it cached already? |
| map<uint64_t,int>::const_iterator where = sLogCache.find(key); |
| sCacheCount++; |
| if (where!=sLogCache.end()) { |
| int retVal = where->second; |
| sLogCacheLock.unlock(); |
| return retVal; |
| } |
| // Look it up in the config table and cache it. |
| // FIXME: Figure out why unlock and lock below fix the config table deadlock. |
| sLogCacheLock.unlock(); |
| int level = getLoggingLevel(filename); |
| sLogCacheLock.lock(); |
| sLogCache.insert(pair<uint64_t,int>(key,level)); |
| sLogCacheLock.unlock(); |
| return level; |
| } |
| |
| |
| |
| |
| |
| // copies the alarm list and returns it. list supposed to be small. |
| list<string> gGetLoggerAlarms() |
| { |
| alarmsLock.lock(); |
| list<string> ret; |
| // excuse the "complexity", but to use std::copy with a list you need |
| // an insert_iterator - copy technically overwrites, doesn't insert. |
| insert_iterator< list<string> > ii(ret, ret.begin()); |
| copy(alarmsList.begin(), alarmsList.end(), ii); |
| alarmsLock.unlock(); |
| return ret; |
| } |
| |
| /** Add an alarm to the alarm list. */ |
| void addAlarm(const string& s) |
| { |
| alarmsLock.lock(); |
| alarmsList.push_back(s); |
| unsigned maxAlarms = gConfig.getNum("Log.Alarms.Max"); |
| while (alarmsList.size() > maxAlarms) alarmsList.pop_front(); |
| alarmsLock.unlock(); |
| } |
| |
| |
| Log::~Log() |
| { |
| if (mDummyInit) return; |
| // Anything at or above LOG_CRIT is an "alarm". |
| // Save alarms in the local list and echo them to stderr. |
| if (mPriority <= LOG_CRIT) { |
| addAlarm(mStream.str().c_str()); |
| cerr << mStream.str() << endl; |
| } |
| // Current logging level was already checked by the macro. |
| // So just log. |
| syslog(mPriority, "%s", mStream.str().c_str()); |
| } |
| |
| |
| Log::Log(const char* name, const char* level, int facility) |
| { |
| mDummyInit = true; |
| gLogInit(name, level, facility); |
| } |
| |
| |
| ostringstream& Log::get() |
| { |
| assert(mPriority<numLevels); |
| mStream << levelNames[mPriority] << ' '; |
| return mStream; |
| } |
| |
| |
| |
| void gLogInit(const char* name, const char* level, int facility) |
| { |
| // Set the level. |
| if (level) { |
| gConfig.set("Log.Level",level); |
| } else { |
| if (!gConfig.defines("Log.Level")) { |
| gConfig.set("Log.Level","WARNING"); |
| } |
| } |
| |
| // Define other logging parameters in the global config. |
| if (!gConfig.defines("Log.Alarms.Max")) { |
| gConfig.set("Log.Alarms.Max",DEFAULT_MAX_ALARMS); |
| } |
| |
| // Open the log connection. |
| openlog(name,0,facility); |
| } |
| |
| |
| |
| |
| // vim: ts=4 sw=4 |