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/*
 * Copyright 2017 Google 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.
 */

package com.google.firebase.database.logging;

/**
 * Private (internal) logging interface used by Firebase Database. See {@link
 * com.google.firebase.database.core.DatabaseConfig DatabaseConfig} for more information.
 *
 * @deprecated Use SLF4J-based logging
 */
public interface Logger {

  /**
   * This method will be triggered whenever the library has something to log
   *
   * @param level The level of the log message
   * @param tag The component that this log message is coming from
   * @param message The message to be logged
   * @param msTimestamp The timestamp, in milliseconds, at which this message was generated
   */
  void onLogMessage(Level level, String tag, String message, long msTimestamp);

  Level getLogLevel();

  /** The log levels used by the Firebase Database library */
  enum Level {
    DEBUG,
    INFO,
    WARN,
    ERROR,
    NONE
  }
}