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The Netty project is an effort to provide an asynchronous event-driven network application framework and tools for rapid development of maintainable high performance and high scalability protocol servers and clients. In other words, Netty is a NIO client server framework which enables quick and easy development of network applications such as protocol servers and clients. It greatly simplifies and streamlines network programming such as TCP and UDP socket server.

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/*
 * Copyright 2012 The Netty Project
 *
 * The Netty Project 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.jboss.netty.logging;

/**
 * Internal-use-only logger used by Netty.  DO NOT
 * access this class outside of Netty.
 */
public interface InternalLogger {
    /**
     * Returns {@code true} if a DEBUG level message is logged.
     */
    boolean isDebugEnabled();

    /**
     * Returns {@code true} if an INFO level message is logged.
     */
    boolean isInfoEnabled();

    /**
     * Returns {@code true} if a WARN level message is logged.
     */
    boolean isWarnEnabled();

    /**
     * Returns {@code true} if an ERROR level message is logged.
     */
    boolean isErrorEnabled();

    /**
     * Returns {@code true} if the specified log level message is logged.
     */
    boolean isEnabled(InternalLogLevel level);

    /**
     * Logs a DEBUG level message.
     */
    void debug(String msg);

    /**
     * Logs a DEBUG level message.
     */
    void debug(String msg, Throwable cause);

    /**
     * Logs an INFO level message.
     */
    void info(String msg);

    /**
     * Logs an INFO level message.
     */
    void info(String msg, Throwable cause);

    /**
     * Logs a WARN level message.
     */
    void warn(String msg);

    /**
     * Logs a WARN level message.
     */
    void warn(String msg, Throwable cause);

    /**
     * Logs an ERROR level message.
     */
    void error(String msg);

    /**
     * Logs an ERROR level message.
     */
    void error(String msg, Throwable cause);

    /**
     * Logs a message.
     */
    void log(InternalLogLevel level, String msg);

    /**
     * Logs a message.
     */
    void log(InternalLogLevel level, String msg, Throwable cause);
}