Java example source code file (AbstractInternalLogger.java)

This example Java source code file (AbstractInternalLogger.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

abstractinternallogger, debug, error, exception_message, info, nullpointerexception, object, objectstreamexception, override, serializable, string, throwable, trace, warn

The AbstractInternalLogger.java Java example source code

/*
 * 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 io.netty.util.internal.logging;

import io.netty.util.internal.StringUtil;

import java.io.ObjectStreamException;
import java.io.Serializable;

/**
 * A skeletal implementation of {@link InternalLogger}.  This class implements
 * all methods that have a {@link InternalLogLevel} parameter by default to call
 * specific logger methods such as {@link #info(String)} or {@link #isInfoEnabled()}.
 */
public abstract class AbstractInternalLogger implements InternalLogger, Serializable {

    private static final long serialVersionUID = -6382972526573193470L;

    private static final String EXCEPTION_MESSAGE = "Unexpected exception:";

    private final String name;

    /**
     * Creates a new instance.
     */
    protected AbstractInternalLogger(String name) {
        if (name == null) {
            throw new NullPointerException("name");
        }
        this.name = name;
    }

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

    @Override
    public boolean isEnabled(InternalLogLevel level) {
        switch (level) {
        case TRACE:
            return isTraceEnabled();
        case DEBUG:
            return isDebugEnabled();
        case INFO:
            return isInfoEnabled();
        case WARN:
            return isWarnEnabled();
        case ERROR:
            return isErrorEnabled();
        default:
            throw new Error();
        }
    }

    @Override
    public void trace(Throwable t) {
        trace(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void debug(Throwable t) {
        debug(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void info(Throwable t) {
        info(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void warn(Throwable t) {
        warn(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void error(Throwable t) {
        error(EXCEPTION_MESSAGE, t);
    }

    @Override
    public void log(InternalLogLevel level, String msg, Throwable cause) {
        switch (level) {
        case TRACE:
            trace(msg, cause);
            break;
        case DEBUG:
            debug(msg, cause);
            break;
        case INFO:
            info(msg, cause);
            break;
        case WARN:
            warn(msg, cause);
            break;
        case ERROR:
            error(msg, cause);
            break;
        default:
            throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, Throwable cause) {
        switch (level) {
            case TRACE:
                trace(cause);
                break;
            case DEBUG:
                debug(cause);
                break;
            case INFO:
                info(cause);
                break;
            case WARN:
                warn(cause);
                break;
            case ERROR:
                error(cause);
                break;
            default:
                throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String msg) {
        switch (level) {
        case TRACE:
            trace(msg);
            break;
        case DEBUG:
            debug(msg);
            break;
        case INFO:
            info(msg);
            break;
        case WARN:
            warn(msg);
            break;
        case ERROR:
            error(msg);
            break;
        default:
            throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object arg) {
        switch (level) {
        case TRACE:
            trace(format, arg);
            break;
        case DEBUG:
            debug(format, arg);
            break;
        case INFO:
            info(format, arg);
            break;
        case WARN:
            warn(format, arg);
            break;
        case ERROR:
            error(format, arg);
            break;
        default:
            throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object argA, Object argB) {
        switch (level) {
        case TRACE:
            trace(format, argA, argB);
            break;
        case DEBUG:
            debug(format, argA, argB);
            break;
        case INFO:
            info(format, argA, argB);
            break;
        case WARN:
            warn(format, argA, argB);
            break;
        case ERROR:
            error(format, argA, argB);
            break;
        default:
            throw new Error();
        }
    }

    @Override
    public void log(InternalLogLevel level, String format, Object... arguments) {
        switch (level) {
        case TRACE:
            trace(format, arguments);
            break;
        case DEBUG:
            debug(format, arguments);
            break;
        case INFO:
            info(format, arguments);
            break;
        case WARN:
            warn(format, arguments);
            break;
        case ERROR:
            error(format, arguments);
            break;
        default:
            throw new Error();
        }
    }

    protected Object readResolve() throws ObjectStreamException {
        return InternalLoggerFactory.getInstance(name());
    }

    @Override
    public String toString() {
        return StringUtil.simpleClassName(this) + '(' + name() + ')';
    }
}