text: /*    Copyright 2013 10gen Inc.
   *
   *    Licensed under the Apache License, Version 2.0 (the "License");
   *    you may not use this file except in compliance with the License.
   *    You may obtain a copy of the License at
   *
   *    http://www.apache.org/licenses/LICENSE-2.0
   *
   *    Unless required by applicable law or agreed to in writing, software
   *    distributed under the License is distributed on an "AS IS" BASIS,
   *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   *    See the License for the specific language governing permissions and
   *    limitations under the License.
   */
  
  #pragma once
  
  #include <iosfwd>
  
  #include "mongo/logger/encoder.h"
  #include "mongo/logger/message_event.h"
  #include "mongo/util/time_support.h"
  
  namespace mongo {
  namespace logger {
  
  /**
   * Encoder that writes log messages of the style that MongoDB writes to console and files.
   */
  class MessageEventDetailsEncoder : public Encoder<MessageEventEphemeral> {
  public:
      typedef void (*DateFormatter)(std::ostream&, Date_t);
  
      /**
       * Sets the date formatter function for all instances of MessageEventDetailsEncoder.
       *
       * Only and always safe to call during single-threaded execution, as in during start-up
       * intiailization.
       */
      static void setDateFormatter(DateFormatter dateFormatter);
  
      /**
       * Gets the date formatter function in use by instances of MessageEventDetailsEncoder.
       *
       * Always safe to call.
       */
      static DateFormatter getDateFormatter();
  
      virtual ~MessageEventDetailsEncoder();
      virtual std::ostream& encode(const MessageEventEphemeral& event, std::ostream& os);
  };
  
  /**
   * Encoder that generates log messages suitable for syslog.
   */
  class MessageEventWithContextEncoder : public Encoder<MessageEventEphemeral> {
  public:
      virtual ~MessageEventWithContextEncoder();
      virtual std::ostream& encode(const MessageEventEphemeral& event, std::ostream& os);
  };
  
  
  /**
   * Encoder that generates log messages containing only the raw text of the message.
   */
  class MessageEventUnadornedEncoder : public Encoder<MessageEventEphemeral> {
  public:
      virtual ~MessageEventUnadornedEncoder();
      virtual std::ostream& encode(const MessageEventEphemeral& event, std::ostream& os);
  };
  
  }  // namespace logger
  }  // namespace mongo
  