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/* Copyright 2013 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/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#pragma once
#include <memory>
#include <sstream>
#include <string>
#include "mongo/logger/labeled_level.h"
#include "mongo/logger/log_component.h"
#include "mongo/logger/log_severity.h"
#include "mongo/logger/message_log_domain.h"
#include "mongo/stdx/chrono.h"
#include "mongo/util/exit_code.h"
namespace mongo {
namespace logger {
class Tee;
/**
* Stream-ish object used to build and append log messages.
*/
class LogstreamBuilder {
public:
static LogSeverity severityCast(int ll) { return LogSeverity::cast(ll); }
static LogSeverity severityCast(LogSeverity ls) { return ls; }
static LabeledLevel severityCast(const LabeledLevel &labeled) { return labeled; }
/**
* Construct a LogstreamBuilder that writes to "domain" on destruction.
*
* "contextName" is a short name of the thread or other context.
* "severity" is the logging severity of the message.
*/
LogstreamBuilder(MessageLogDomain* domain,
std::string contextName,
LogSeverity severity);
/**
* Construct a LogstreamBuilder that writes to "domain" on destruction.
*
* "contextName" is a short name of the thread or other context.
* "severity" is the logging severity of the message.
* "component" is the primary log component of the message.
*/
LogstreamBuilder(MessageLogDomain* domain,
std::string contextName,
LogSeverity severity,
LogComponent component);
/**
* Deprecated.
*/
LogstreamBuilder(MessageLogDomain* domain,
const std::string& contextName,
LabeledLevel labeledLevel);
/**
* Move constructor.
*
* TODO: Replace with = default implementation when minimum MSVC version is bumped to
* MSVC2015.
*/
LogstreamBuilder(LogstreamBuilder&& other);
/**
* Move assignment operator.
*
* TODO: Replace with =default implementation when minimum MSVC version is bumped to VS2015.
*/
LogstreamBuilder& operator=(LogstreamBuilder&& other);
/**
* Destroys a LogstreamBuilder(). If anything was written to it via stream() or operator<<,
* constructs a MessageLogDomain::Event and appends it to the associated domain.
*/
~LogstreamBuilder();
/**
* Sets an optional prefix for the message.
*/
LogstreamBuilder& setBaseMessage(const std::string& baseMessage) {
_baseMessage = baseMessage;
return *this;
}
std::ostream& stream() { if (!_os) makeStream(); return *_os; }
LogstreamBuilder& operator<<(const char *x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(const std::string& x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(StringData x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(char *x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(char x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(int x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(ExitCode x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(long x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(unsigned long x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(unsigned x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(unsigned short x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(double x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(void *x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(const void *x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(long long x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(unsigned long long x) { stream() << x; return *this; }
LogstreamBuilder& operator<<(bool x) { stream() << x; return *this; }
template <typename Rep, typename Period>
LogstreamBuilder& operator<<(stdx::chrono::duration<Rep, Period> d) {
stream() << d;
return *this;
}
template <typename T>
LogstreamBuilder& operator<<(const T& x) {
stream() << x.toString();
return *this;
}
LogstreamBuilder& operator<< (std::ostream& ( *manip )(std::ostream&)) {
stream() << manip;
return *this;
}
LogstreamBuilder& operator<< (std::ios_base& (*manip)(std::ios_base&)) {
stream() << manip;
return *this;
}
/**
* In addition to appending the message to _domain, write it to the given tee. May only
* be called once per instance of LogstreamBuilder.
*/
void operator<<(Tee* tee);
private:
void makeStream();
MessageLogDomain* _domain;
std::string _contextName;
LogSeverity _severity;
LogComponent _component;
std::string _baseMessage;
std::unique_ptr<std::ostringstream> _os;
Tee* _tee;
};
} // namespace logger
} // namespace mongo
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