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/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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
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package org.apache.log4j.spi;

import java.util.Enumeration;

import org.apache.log4j.Appender;
import org.apache.log4j.Category;
import org.apache.log4j.Level;
import org.apache.log4j.Logger;

/**
   A LoggerRepository is used to create and retrieve
   Loggers. The relation between loggers in a repository
   depends on the repository but typically loggers are arranged in a
   named hierarchy.

   

In addition to the creational methods, a LoggerRepository can be queried for existing loggers, can act as a point of registry for events related to loggers. @author Ceki Gülcü @since 1.2 */ public interface LoggerRepository { /** Add a {@link HierarchyEventListener} event to the repository. */ public void addHierarchyEventListener(HierarchyEventListener listener); /** Returns whether this repository is disabled for a given level. The answer depends on the repository threshold and the level parameter. See also {@link #setThreshold} method. */ boolean isDisabled(int level); /** Set the repository-wide threshold. All logging requests below the threshold are immediately dropped. By default, the threshold is set to Level.ALL which has the lowest possible rank. */ public void setThreshold(Level level); /** Another form of {@link #setThreshold(Level)} accepting a string parameter instead of a Level. */ public void setThreshold(String val); public void emitNoAppenderWarning(Category cat); /** Get the repository-wide threshold. See {@link #setThreshold(Level)} for an explanation. */ public Level getThreshold(); public Logger getLogger(String name); public Logger getLogger(String name, LoggerFactory factory); public Logger getRootLogger(); public abstract Logger exists(String name); public abstract void shutdown(); public Enumeration getCurrentLoggers(); /** Deprecated. Please use {@link #getCurrentLoggers} instead. */ public Enumeration getCurrentCategories(); public abstract void fireAddAppenderEvent(Category logger, Appender appender); public abstract void resetConfiguration(); }





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