Maven Central: org.apache.logging.log4j:log4j-core

log4j-core

Overview

Description

A versatile, industrial-grade, and reference implementation of the Log4j API. It bundles a rich set of components to assist various use cases:

Appenders targeting files, network sockets, databases, SMTP servers;
Layouts that can render CSV, HTML, JSON, Syslog, etc. formatted outputs;
Filters that can be configured using log event rates, regular expressions, scripts, time, etc. It contains several extension points to introduce custom components, if needed.

Snippets

Apache Maven

<dependency>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j-core</artifactId>
    <version>2.26.1</version>
</dependency>

Maven POM File

<?xml version="1.0" encoding="UTF-8"?>
<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd" xmlns="http://maven.apache.org/POM/4.0.0"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.apache.logging.log4j</groupId>
    <artifactId>log4j</artifactId>
    <version>2.26.1</version>
    <relativePath>../log4j-parent</relativePath>
  </parent>
  <artifactId>log4j-core</artifactId>
  <version>2.26.1</version>
  <name>Apache Log4j Core</name>
  <description>A versatile, industrial-grade, and reference implementation of the Log4j API. It bundles a rich set of components to assist various use cases: Appenders targeting files, network sockets, databases, SMTP servers; Layouts that can render CSV, HTML, JSON, Syslog, etc. formatted outputs; Filters that can be configured using log event rates, regular expressions, scripts, time, etc. It contains several extension points to introduce custom components, if needed.</description>
  <url>https://logging.apache.org/log4j/2.x/</url>
  <licenses>
    <license>
      <name>Apache-2.0</name>
      <url>https://www.apache.org/licenses/LICENSE-2.0.txt</url>
      <distribution>repo</distribution>
    </license>
  </licenses>
  <properties>
    <maven.test.skip>true</maven.test.skip>
    <disruptor.support.range>[3.4,5)</disruptor.support.range>
    <bnd-extra-package-options>org.jspecify.*;resolution:=optional,
      com.conversantmedia.util.concurrent;resolution:=optional;
      com.fasterxml.jackson.*;resolution:=optional,
      com.lmax.disruptor.*;version="${disruptor.support.range}";resolution:=optional,
      javax.activation;resolution:=optional,
      javax.jms;version="[1.1,3)";resolution:=optional,
      javax.mail.*;version="[1.6,2)";resolution:=optional,
      org.apache.commons.compress.*;resolution:=optional,
      org.apache.commons.csv;resolution:=optional,
      org.apache.kafka.*;resolution:=optional,
      org.codehaus.stax2.*;resolution:=optional,
      org.jctools.*;resolution:=optional,
      org.zeromq;resolution:=optional,
      javax.lang.model.*;resolution:=optional,
      javax.tools;resolution:=optional,
      java.sql;resolution:=optional,
      javax.sql;resolution:=optional,
      java.util.logging;resolution:=optional,
      java.lang.management;resolution:=optional,
      javax.management.*;resolution:=optional,
      javax.naming;resolution:=optional</bnd-extra-package-options>
    <maven.javadoc.skip>false</maven.javadoc.skip>
    <log4j.docgen.pluginDescriptorsDir>${log4j.docgen.pluginDescriptorsDir.phase1}</log4j.docgen.pluginDescriptorsDir>
    <bnd-multi-release>true</bnd-multi-release>
    <bnd-extra-module-options>org.osgi.core;static=true;transitive=false,
      java.logging;static=true,
      java.sql;static=true,
      com.fasterxml.jackson.annotation;transitive=false,
      com.lmax.disruptor;transitive=false,
      com.fasterxml.jackson.core;transitive=false,
      com.fasterxml.jackson.databind;transitive=false,
      com.fasterxml.jackson.dataformat.xml;transitive=false,
      com.fasterxml.jackson.dataformat.yaml;transitive=false,
      java.management;transitive=false;static=true,
      java.naming;transitive=false,
      org.apache.commons.csv;transitive=false,
      org.jspecify;transitive=false,
      org.zeromq.jeromq;transitive=false,
      com.conversantmedia.disruptor;substitute="disruptor";transitive=false;static=true,
      kafka.clients;substitute="kafka-clients";transitive=false;static=true,
      javax.jms.api;substitute="javax.jms-api";transitive=false;static=true,
      javax.mail.api;substitute="javax.mail-api";transitive=false;static=true</bnd-extra-module-options>
  </properties>
  <dependencies>
    <dependency>
      <groupId>javax.activation</groupId>
      <artifactId>javax.activation-api</artifactId>
      <scope>provided</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>javax.jms</groupId>
      <artifactId>javax.jms-api</artifactId>
      <scope>provided</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>javax.mail</groupId>
      <artifactId>javax.mail-api</artifactId>
      <scope>provided</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.jspecify</groupId>
      <artifactId>jspecify</artifactId>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.osgi</groupId>
      <artifactId>org.osgi.core</artifactId>
      <scope>provided</scope>
    </dependency>
    <dependency>
      <groupId>org.apache.logging.log4j</groupId>
      <artifactId>log4j-api</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-compress</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.apache.commons</groupId>
      <artifactId>commons-csv</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.conversantmedia</groupId>
      <artifactId>disruptor</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.lmax</groupId>
      <artifactId>disruptor</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-core</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.core</groupId>
      <artifactId>jackson-databind</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-xml</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.fasterxml.jackson.dataformat</groupId>
      <artifactId>jackson-dataformat-yaml</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.jctools</groupId>
      <artifactId>jctools-core</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.zeromq</groupId>
      <artifactId>jeromq</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.apache.kafka</groupId>
      <artifactId>kafka-clients</artifactId>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>com.sun.mail</groupId>
      <artifactId>javax.mail</artifactId>
      <scope>runtime</scope>
      <optional>true</optional>
    </dependency>
    <dependency>
      <groupId>org.codehaus.woodstox</groupId>
      <artifactId>stax2-api</artifactId>
      <optional>true</optional>
    </dependency>
  </dependencies>
  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>build-helper-maven-plugin</artifactId>
        <executions>
          <execution>
            <id>add-source</id>
            <phase>generate-sources</phase>
            <goals>
              <goal>add-source</goal>
            </goals>
            <configuration>
              <sources>
                <source>${project.build.directory}/log4j-core-java9</source>
              </sources>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <artifactId>maven-dependency-plugin</artifactId>
        <executions>
          <execution>
            <id>unpack-classes</id>
            <phase>prepare-package</phase>
            <goals>
              <goal>unpack</goal>
            </goals>
            <configuration>
              <artifactItems>
                <artifactItem>
                  <groupId>org.apache.logging.log4j</groupId>
                  <artifactId>log4j-core-java9</artifactId>
                  <version>${project.version}</version>
                  <type>zip</type>
                  <overWrite>false</overWrite>
                </artifactItem>
              </artifactItems>
              <includes>**/*.class</includes>
              <excludes>**/*.java</excludes>
              <outputDirectory>${project.build.directory}</outputDirectory>
              <overWriteReleases>false</overWriteReleases>
              <overWriteSnapshots>true</overWriteSnapshots>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>
</project>

Metadata

Age:25 days ago

Licenses

Apache-2.0

Organization

org.apache.logging.log4j

External Resources

Known Contributors

Bruce Brouwer, Matt Sicker, Scott Deboy, Carter Kozak, Raman Gupta, Gary Gregory, Remko Popma, Mikael Ståldal, Piotr P. Karwasz, Volkan Yazıcı, Christian Grobmeier, Ralph Goers, Ron Grabowski, Nick Williams

Sonatype Guide See vulnerability info View