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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 2009 Red Hat, Inc.
 *
 * Red Hat 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;

import org.osgi.service.log.LogService;

/**
 * OSGi {@link LogService} logger.
 *
 * @author The Netty Project
 * @author Trustin Lee
 *
 * @version $Rev: 2080 $, $Date: 2010-01-26 18:04:19 +0900 (Tue, 26 Jan 2010) $
 *
 */
class OsgiLogger extends AbstractInternalLogger {

    private final OsgiLoggerFactory parent;
    private final InternalLogger fallback;
    private final String name;
    private final String prefix;

    OsgiLogger(OsgiLoggerFactory parent, String name, InternalLogger fallback) {
        this.parent = parent;
        this.name = name;
        this.fallback = fallback;
        prefix = "[" + name + "] ";
    }

    public void debug(String msg) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_DEBUG, prefix + msg);
        } else {
            fallback.debug(msg);
        }
    }

    public void debug(String msg, Throwable cause) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_DEBUG, prefix + msg, cause);
        } else {
            fallback.debug(msg, cause);
        }
    }

    public void error(String msg) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_ERROR, prefix + msg);
        } else {
            fallback.error(msg);
        }
    }

    public void error(String msg, Throwable cause) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_ERROR, prefix + msg, cause);
        } else {
            fallback.error(msg, cause);
        }
    }

    public void info(String msg) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_INFO, prefix + msg);
        } else {
            fallback.info(msg);
        }
    }

    public void info(String msg, Throwable cause) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_INFO, prefix + msg, cause);
        } else {
            fallback.info(msg, cause);
        }
    }

    public boolean isDebugEnabled() {
        return true;
    }

    public boolean isErrorEnabled() {
        return true;
    }

    public boolean isInfoEnabled() {
        return true;
    }

    public boolean isWarnEnabled() {
        return true;
    }

    public void warn(String msg) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_WARNING, prefix + msg);
        } else {
            fallback.warn(msg);
        }
    }

    public void warn(String msg, Throwable cause) {
        LogService logService = parent.getLogService();
        if (logService != null) {
            logService.log(LogService.LOG_WARNING, prefix + msg, cause);
        } else {
            fallback.warn(msg, cause);
        }
    }

    @Override
    public String toString() {
        return name;
    }
}