Source Code for Apache Log4j Tag Library

Apache Log4j Tag Library creates the capability of inserting log statements in JSPs without the use of Java scripting.

Bytecode (Java 8) for Apache Log4j Tag Library is provided in a separate JAR file like log4j-taglib-2.14.1.jar.

Source Code files for Apache Log4j IOStreams are provided in both binary packge like apache-log4j-2.14.1-bin.zip and source package like apache-log4j-2.14.1-src.zip. You can download them at Apache Log4j Website.

You can also browse Source Code files for Apache Log4j Tag Library 2.14.1 below.

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org/apache/logging/log4j/taglib/LoggerAwareTagSupport.java

/*
 * 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.logging.log4j.taglib;

import javax.servlet.jsp.JspException;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyTagSupport;

/**
 * An abstract class for all tags that are logger-aware.
 *
 * @since 2.0
 */
abstract class LoggerAwareTagSupport extends BodyTagSupport {
    private static final long serialVersionUID = 1L;

    private transient Log4jTaglibLoggerContext loggerContext;

    private transient Object logger;

    protected LoggerAwareTagSupport() {
        this.init();
    }

    protected void init() {
        this.logger = null;
    }

    @Override
    public final void release() {
        super.release();
        this.init();
    }

    @Override
    public final void setPageContext(final PageContext pageContext) {
        super.setPageContext(pageContext);
        this.loggerContext = Log4jTaglibLoggerContext.getInstance(pageContext.getServletContext());
    }

    protected final Log4jTaglibLogger getLogger() throws JspException {
        if (this.logger != null) {
            return TagUtils.resolveLogger(this.loggerContext, this.logger, null);
        }
        Log4jTaglibLogger logger = TagUtils.getDefaultLogger(this.pageContext);
        if (logger == null) {
            final String name = this.pageContext.getPage().getClass().getName();
            logger = TagUtils.resolveLogger(this.loggerContext, name, null);
            TagUtils.setDefaultLogger(this.pageContext, logger);
        }
        return logger;
    }

    public final void setLogger(final Object logger) {
        this.logger = logger;
    }
}

org/apache/logging/log4j/taglib/LoggerAwareTagSupport.java

 

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2015-11-04, 6589👍, 0💬