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// log.h
/**
* Copyright (C) 2008 10gen Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* 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/>.
*/
#pragma once
namespace mongo {
class LazyString {
public:
virtual ~LazyString() {}
virtual string val() const = 0;
};
template< class T >
class LazyStringImpl : public LazyString {
public:
LazyStringImpl( const T &t ) : t_( t ) {}
virtual string val() const { return (string)t_; }
private:
const T& t_;
};
class Nullstream {
public:
virtual ~Nullstream() {}
virtual Nullstream& operator<<(const char *) {
return *this;
}
virtual Nullstream& operator<<(char *) {
return *this;
}
virtual Nullstream& operator<<(char) {
return *this;
}
virtual Nullstream& operator<<(int) {
return *this;
}
virtual Nullstream& operator<<(unsigned long) {
return *this;
}
virtual Nullstream& operator<<(long) {
return *this;
}
virtual Nullstream& operator<<(unsigned) {
return *this;
}
virtual Nullstream& operator<<(double) {
return *this;
}
virtual Nullstream& operator<<(void *) {
return *this;
}
virtual Nullstream& operator<<(const void *) {
return *this;
}
virtual Nullstream& operator<<(long long) {
return *this;
}
virtual Nullstream& operator<<(unsigned long long) {
return *this;
}
virtual Nullstream& operator<<(bool) {
return *this;
}
virtual Nullstream& operator<<(const LazyString&) {
return *this;
}
template< class T >
Nullstream& operator<<(T *t) {
return operator<<( static_cast<void*>( t ) );
}
template< class T >
Nullstream& operator<<(const T *t) {
return operator<<( static_cast<const void*>( t ) );
}
template< class T >
Nullstream& operator<<(const T &t) {
return operator<<( static_cast<const LazyString&>( LazyStringImpl< T >( t ) ) );
}
virtual Nullstream& operator<< (ostream& ( *endl )(ostream&)) {
return *this;
}
virtual Nullstream& operator<< (ios_base& (*hex)(ios_base&)) {
return *this;
}
virtual void flush(){}
};
extern Nullstream nullstream;
#define LOGIT { boostlock lk(mutex); cout << x; return *this; }
class Logstream : public Nullstream {
static boost::mutex &mutex;
public:
void flush() {
boostlock lk(mutex);
cout.flush();
}
Logstream& operator<<(const char *x) LOGIT
Logstream& operator<<(char *x) LOGIT
Logstream& operator<<(char x) LOGIT
Logstream& operator<<(int x) LOGIT
Logstream& operator<<(long x) LOGIT
Logstream& operator<<(unsigned long x) LOGIT
Logstream& operator<<(unsigned x) LOGIT
Logstream& operator<<(double x) LOGIT
Logstream& operator<<(void *x) LOGIT
Logstream& operator<<(const void *x) LOGIT
Logstream& operator<<(long long x) LOGIT
Logstream& operator<<(unsigned long long x) LOGIT
Logstream& operator<<(bool x) LOGIT
Logstream& operator<<(const LazyString& x) {
string res = x.val();
boostlock lk(mutex);
cout << res;
return *this;
}
Logstream& operator<< (ostream& ( *_endl )(ostream&)) {
boostlock lk(mutex);
cout << _endl;
return *this;
}
Logstream& operator<< (ios_base& (*_hex)(ios_base&)) {
boostlock lk(mutex);
cout << _hex;
return *this;
}
Logstream& prolog(bool withNs = false) {
char now[64];
time_t_to_String(time(0), now);
now[20] = 0;
boostlock lk(mutex);
cout << now;
if ( withNs && /*database && */curNs )
cout << curNs << ' ';
return *this;
}
};
extern Logstream logstream;
extern int logLevel;
inline Nullstream& problem( int level = 0 ) {
if ( level > logLevel )
return nullstream;
return logstream.prolog(true);
}
inline Nullstream& out( int level = 0 ) {
if ( level > logLevel )
return nullstream;
return logstream;
}
/* flush the log stream if the log level is
at the specified level or higher. */
inline void logflush(int level = 0) {
if( level > logLevel )
logstream.flush();
}
inline Nullstream& log( int level = 0 ){
if ( level > logLevel )
return nullstream;
return logstream.prolog();
}
inline ostream& stdcout() {
return cout;
}
} // namespace mongo
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