Source Code for Apache Log4j Core Implementation

Apache Log4j Core Implementation provides the functional components of the logging system. Users are free to create their own plugins and include them in the logging configuration. Apache Log4j Core is a required module to use Apache Log4j.

Bytecode (Java 8) for Apache Log4j Core Implementation is provided in a separate JAR file like log4j-core-2.14.1.jar.

Source Code files for Apache Log4j API 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 Core Implementation 2.14.1 below.

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org/apache/logging/log4j/core/appender/rolling/action/CommonsCompressAction.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.core.appender.rolling.action;

import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.util.Objects;

import org.apache.commons.compress.compressors.CompressorException;
import org.apache.commons.compress.compressors.CompressorStreamFactory;
import org.apache.commons.compress.utils.IOUtils;

/**
 * Compresses a file using bzip2 compression.
 */
public final class CommonsCompressAction extends AbstractAction {

    private static final int BUF_SIZE = 8192;

    /**
     * Compressor name. One of "gz", "bzip2", "xz", "pack200" or "deflate".
     */
    private final String name;

    /**
     * Source file.
     */
    private final File source;

    /**
     * Destination file.
     */
    private final File destination;

    /**
     * If true, attempt to delete file on completion.
     */
    private final boolean deleteSource;

    /**
     * Creates new instance of Bzip2CompressAction.
     *
     * @param name the compressor name. One of "gz", "bzip2", "xz", "pack200", or "deflate".
     * @param source file to compress, may not be null.
     * @param destination compressed file, may not be null.
     * @param deleteSource if true, attempt to delete file on completion. Failure to delete does not cause an exception
     *            to be thrown or affect return value.
     */
    public CommonsCompressAction(final String name, final File source, final File destination,
            final boolean deleteSource) {
        Objects.requireNonNull(source, "source");
        Objects.requireNonNull(destination, "destination");
        this.name = name;
        this.source = source;
        this.destination = destination;
        this.deleteSource = deleteSource;
    }

    /**
     * Compresses.
     *
     * @return true if successfully compressed.
     * @throws IOException on IO exception.
     */
    @Override
    public boolean execute() throws IOException {
        return execute(name, source, destination, deleteSource);
    }

    /**
     * Compresses a file.
     *
     * @param name the compressor name, i.e. "gz", "bzip2", "xz", "pack200", or "deflate".
     * @param source file to compress, may not be null.
     * @param destination compressed file, may not be null.
     * @param deleteSource if true, attempt to delete file on completion. Failure to delete does not cause an exception
     *            to be thrown or affect return value.
     *
     * @return true if source file compressed.
     * @throws IOException on IO exception.
     */
    public static boolean execute(final String name, final File source, final File destination,
            final boolean deleteSource) throws IOException {
        if (!source.exists()) {
            return false;
        }
        LOGGER.debug("Starting {} compression of {}", name, source.getPath() );
        try (final FileInputStream input = new FileInputStream(source);
                final BufferedOutputStream output = new BufferedOutputStream(
                        new CompressorStreamFactory().createCompressorOutputStream(name, new FileOutputStream(
                                destination)))) {
            IOUtils.copy(input, output, BUF_SIZE);
            LOGGER.debug("Finished {} compression of {}", name, source.getPath() );
        } catch (final CompressorException e) {
            throw new IOException(e);
        }

        if (deleteSource) {
            try {
                if (Files.deleteIfExists(source.toPath())) {
                    LOGGER.debug("Deleted {}", source.toString());
                } else {
                    LOGGER.warn("Unable to delete {} after {} compression. File did not exist", source.toString(), name);
                }
            } catch (final Exception ex) {
                LOGGER.warn("Unable to delete {} after {} compression, {}", source.toString(), name, ex.getMessage());
            }
        }

        return true;
    }

    /**
     * Reports exception.
     *
     * @param ex exception.
     */
    @Override
    protected void reportException(final Exception ex) {
        LOGGER.warn("Exception during " + name + " compression of '" + source.toString() + "'.", ex);
    }

    @Override
    public String toString() {
        return CommonsCompressAction.class.getSimpleName() + '[' + source + " to " + destination
                + ", deleteSource=" + deleteSource + ']';
    }

    public String getName() {
        return name;
    }

    public File getSource() {
        return source;
    }

    public File getDestination() {
        return destination;
    }

    public boolean isDeleteSource() {
        return deleteSource;
    }
}

org/apache/logging/log4j/core/appender/rolling/action/CommonsCompressAction.java

 

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File name: log4j-core-2.14.1-sources.jar
File size: 1281358 bytes
Release date: 2021-03-06
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