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/* Copyright 2018 MongoDB 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 <functional>
#include <sstream>
#include "mongo/base/status.h"
#include "mongo/logger/appender.h"
#include "mongo/logger/encoder.h"
namespace mongo {
namespace embedded {
/**
* Appender for writing to callbacks registered with the embedded C API.
*/
template <typename Event>
class EmbeddedLogAppender : public logger::Appender<Event> {
EmbeddedLogAppender(EmbeddedLogAppender const&) = delete;
EmbeddedLogAppender& operator=(EmbeddedLogAppender const&) = delete;
public:
typedef logger::Encoder<Event> EventEncoder;
explicit EmbeddedLogAppender(
std::function<void(void*, const char*, const char*, const char*, int)> callback,
void* callbackUserData,
std::unique_ptr<EventEncoder> encoder)
: _encoder(std::move(encoder)),
_callback(std::move(callback)),
_callbackUserData(callbackUserData) {}
Status append(const Event& event) final {
std::stringstream output;
_encoder->encode(event, output);
_callback(_callbackUserData,
output.str().c_str(),
event.getComponent().getShortName().c_str(),
event.getContextName().toString().c_str(),
event.getSeverity().toInt());
return Status::OK();
}
private:
std::unique_ptr<EventEncoder> _encoder;
std::function<void(void*, const char*, const char*, const char*, int)> _callback;
void* const _callbackUserData;
};
} // namespace embedded
} // namespace mongo
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