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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.
✍: FYIcenter.com
⏎ org/apache/logging/log4j/core/pattern/AbstractStyleNameConverter.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.pattern; import java.lang.reflect.Constructor; import java.lang.reflect.InvocationTargetException; import java.util.Arrays; import java.util.List; import org.apache.logging.log4j.core.LogEvent; import org.apache.logging.log4j.core.config.Configuration; import org.apache.logging.log4j.core.config.plugins.Plugin; import org.apache.logging.log4j.core.layout.PatternLayout; import org.apache.logging.log4j.util.PerformanceSensitive; /** * Style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ public abstract class AbstractStyleNameConverter extends LogEventPatternConverter /*TODO: implements AnsiConverter*/ { private final List<PatternFormatter> formatters; private final String style; /** * Constructs the converter. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ protected AbstractStyleNameConverter(final String name, final List<PatternFormatter> formatters, final String styling) { super(name, "style"); this.formatters = formatters; this.style = styling; } /** * Black style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Black.NAME, category = "Converter") @ConverterKeys(Black.NAME) public static final class Black extends AbstractStyleNameConverter { /** Black */ protected static final String NAME = "black"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Black(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Black newInstance(final Configuration config, final String[] options) { return newInstance(Black.class, NAME, config, options); } } /** * Blue style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Blue.NAME, category = "Converter") @ConverterKeys(Blue.NAME) public static final class Blue extends AbstractStyleNameConverter { /** Blue */ protected static final String NAME = "blue"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Blue(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Blue newInstance(final Configuration config, final String[] options) { return newInstance(Blue.class, NAME, config, options); } } /** * Cyan style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Cyan.NAME, category = "Converter") @ConverterKeys(Cyan.NAME) public static final class Cyan extends AbstractStyleNameConverter { /** Cyan */ protected static final String NAME = "cyan"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Cyan(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Cyan newInstance(final Configuration config, final String[] options) { return newInstance(Cyan.class, NAME, config, options); } } /** * Green style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Green.NAME, category = "Converter") @ConverterKeys(Green.NAME) public static final class Green extends AbstractStyleNameConverter { /** Green */ protected static final String NAME = "green"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Green(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Green newInstance(final Configuration config, final String[] options) { return newInstance(Green.class, NAME, config, options); } } /** * Magenta style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Magenta.NAME, category = "Converter") @ConverterKeys(Magenta.NAME) public static final class Magenta extends AbstractStyleNameConverter { /** Magenta */ protected static final String NAME = "magenta"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Magenta(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Magenta newInstance(final Configuration config, final String[] options) { return newInstance(Magenta.class, NAME, config, options); } } /** * Red style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Red.NAME, category = "Converter") @ConverterKeys(Red.NAME) public static final class Red extends AbstractStyleNameConverter { /** Red */ protected static final String NAME = "red"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Red(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Red newInstance(final Configuration config, final String[] options) { return newInstance(Red.class, NAME, config, options); } } /** * White style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = White.NAME, category = "Converter") @ConverterKeys(White.NAME) public static final class White extends AbstractStyleNameConverter { /** White */ protected static final String NAME = "white"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public White(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static White newInstance(final Configuration config, final String[] options) { return newInstance(White.class, NAME, config, options); } } /** * Yellow style pattern converter. Adds ANSI color styling to the result of the enclosed pattern. */ @Plugin(name = Yellow.NAME, category = "Converter") @ConverterKeys(Yellow.NAME) public static final class Yellow extends AbstractStyleNameConverter { /** Yellow */ protected static final String NAME = "yellow"; /** * Constructs the converter. This constructor must be public. * * @param formatters The PatternFormatters to generate the text to manipulate. * @param styling The styling that should encapsulate the pattern. */ public Yellow(final List<PatternFormatter> formatters, final String styling) { super(NAME, formatters, styling); } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ public static Yellow newInstance(final Configuration config, final String[] options) { return newInstance(Yellow.class, NAME, config, options); } } /** * Gets an instance of the class (called via reflection). * * @param config The current Configuration. * @param options The pattern options, may be null. If the first element is "short", only the first line of the * throwable will be formatted. * @return new instance of class or null */ protected static <T extends AbstractStyleNameConverter> T newInstance(final Class<T> asnConverterClass, final String name, final Configuration config, final String[] options) { final List<PatternFormatter> formatters = toPatternFormatterList(config, options); if (formatters == null) { return null; } try { final Constructor<T> constructor = asnConverterClass.getConstructor(List.class, String.class); return constructor.newInstance(formatters, AnsiEscape.createSequence(name)); } catch (final SecurityException | NoSuchMethodException | IllegalArgumentException | InstantiationException | IllegalAccessException | InvocationTargetException e) { LOGGER.error(e.toString(), e); } return null; } /** * Creates a list of PatternFormatter from the given configuration and options or null if no pattern is supplied. * * @param config A configuration. * @param options pattern options. * @return a list of PatternFormatter from the given configuration and options or null if no pattern is supplied. */ private static List<PatternFormatter> toPatternFormatterList(final Configuration config, final String[] options) { if (options.length == 0 || options[0] == null) { LOGGER.error("No pattern supplied on style for config=" + config); return null; } final PatternParser parser = PatternLayout.createPatternParser(config); if (parser == null) { LOGGER.error("No PatternParser created for config=" + config + ", options=" + Arrays.toString(options)); return null; } return parser.parse(options[0]); } /** * {@inheritDoc} */ @Override @PerformanceSensitive("allocation") public void format(final LogEvent event, final StringBuilder toAppendTo) { final int start = toAppendTo.length(); for (int i = 0; i < formatters.size(); i++) { final PatternFormatter formatter = formatters.get(i); formatter.format(event, toAppendTo); } if (toAppendTo.length() > start) { toAppendTo.insert(start, style); toAppendTo.append(AnsiEscape.getDefaultStyle()); } } }
⏎ org/apache/logging/log4j/core/pattern/AbstractStyleNameConverter.java
Or download all of them as a single archive file:
File name: log4j-core-2.14.1-sources.jar File size: 1281358 bytes Release date: 2021-03-06 Download
⇒ Source Code for Apache Log4j JDK Logging Adapter
⇐ Source Code for Apache Log4j API
2015-11-03, 107491👍, 0💬
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