/* * 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 * limitations under the License. */ package org.apache.log4j.spi; import org.apache.log4j.*; import java.util.Enumeration; /** 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(); }