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| |
| <section> |
| <h2><a name="Log4j_Runtime_Dependencies"></a>Log4j Runtime Dependencies</h2> |
| |
| <p> |
| Some Log4J features depend on external libraries. This page lists the required and optional |
| dependencies. |
| </p> |
| |
| <p> |
| As of version 2.10.0 the Log4j API is a named Java module (with a module-info.java). |
| Since version 2.21.0 all the remaining artifacts are named modules. |
| The characteristics of the modules are: |
| |
| </p> |
| <table border="0" class="table table-striped"> |
| |
| <tr class="a"> |
| |
| <th>Artifact Name</th> |
| |
| <th>Module Name</th> |
| |
| <th>Module Characteristics</th> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-api</td> |
| |
| <td>org.apache.logging.log4j</td> |
| |
| <td> |
| |
| <table border="0" class="table table-striped"> |
| |
| <tr class="a"> |
| |
| <th>Module Directive</th> |
| |
| <th>Notes</th> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">exports org.apache.logging.log4j</td> |
| |
| <td></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">exports org.apache.logging.log4j.message</td> |
| |
| <td></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">exports org.apache.logging.log4j.simple</td> |
| |
| <td></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">exports org.apache.logging.log4j.spi</td> |
| |
| <td></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">exports org.apache.logging.log4j.spi</td> |
| |
| <td></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">exports org.apache.logging.log4j.util</td> |
| |
| <td>Some classes in this package are used by the logging implementation and should be |
| considered private. The module info definition may be modified in the future to export |
| these only to the logging implementation.</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">uses org.apache.logging.log4j.spi.Provider</td> |
| |
| <td>Service that must be provided by the logging implementation.</td> |
| </tr> |
| </table> |
| </td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-appserver</td> |
| |
| <td>org.apache.logging.log4j.appserver</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-cassandra</td> |
| |
| <td>org.apache.logging.log4j.cassandra</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-core</td> |
| |
| <td>org.apache.logging.log4j.core</td> |
| |
| <td>Named Module. Most of its dependencies are optional.</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-couchdb</td> |
| |
| <td>org.apache.logging.log4j.couchdb</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-docker</td> |
| |
| <td>org.apache.logging.log4j.docker</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-1.2-api</td> |
| |
| <td>org.apache.log4j</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-flume-ng</td> |
| |
| <td>org.apache.logging.log4j.flume</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-iostreams</td> |
| |
| <td>org.apache.logging.log4j.iostreams</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-jakarta-smtp</td> |
| |
| <td>org.apache.logging.log4j.smtp</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-jakarta-web</td> |
| |
| <td>org.apache.logging.log4j.web</td> |
| |
| <td>Named Module. Uses the same name as <code>log4j-web</code> since it is its Jakarta EE 9 equivalent.</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-jcl</td> |
| |
| <td>org.apache.logging.log4j.jcl</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-jul</td> |
| |
| <td>org.apache.logging.log4j.jul</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-mongodb</td> |
| |
| <td>org.apache.logging.log4j.mongodb</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-slf4j-impl</td> |
| |
| <td>org.apache.logging.log4j.slf4j.impl</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-slf4j2-impl</td> |
| |
| <td>org.apache.logging.log4j.slf4j2.impl</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-taglib</td> |
| |
| <td>org.apache.logging.log4j.taglib</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">log4j-to-slf4j</td> |
| |
| <td>org.apache.logging.log4j.to.slf4j</td> |
| |
| <td>Named Module</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">log4j-web</td> |
| |
| <td>org.apache.logging.log4j.web</td> |
| |
| <td>Named Module. Uses the same name as <code>log4j-jakarta-web</code> since it is its Java EE 8 equivalent.</td> |
| </tr> |
| </table> |
| |
| |
| <p> |
| As of version 2.9.1 Log4j supports Java 9 but will still work in Java 7 or 8. In this version log4j-api is |
| packaged as a multi-release jar and supports the use of the StackWalker and Process APIs. |
| </p> |
| |
| <p> |
| As of version 2.4, Log4J requires Java 7. |
| </p> |
| |
| <p> |
| Log4j version 2.3 and older require Java 6. |
| </p> |
| |
| <a name="log4j-api"></a> |
| <section><section> |
| <h4><a name="log4j-api"></a>log4j-api</h4> |
| |
| <p> |
| The Log4J <a href="log4j-api/index.html">API</a> module has no external dependencies. |
| </p> |
| |
| <a name="log4j-core"></a> |
| </section><section> |
| <h4><a name="log4j-core"></a>log4j-core</h4> |
| |
| <p> |
| The Log4J <a href="log4j-core/index.html">Implementation</a> has several optional |
| <a href="log4j-core/dependencies.html">dependencies</a>. |
| See the <a href="log4j-core/dependencies.html#Dependency_Tree">Dependency Tree</a> for the |
| exact list of JAR files needed for these features. |
| </p> |
| |
| <table border="0" class="table table-striped"><caption align="top">Optional Dependencies per Feature in Log4J Implementation</caption> |
| |
| |
| <tr class="a"> |
| |
| <th>Feature</th> |
| |
| <th>Requirements</th> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">XML configuration</td> |
| |
| <td>-</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">Properties configuration</td> |
| |
| <td>-</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">JSON configuration</td> |
| |
| <td><a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson core and databind</a></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">YAML configuration</td> |
| |
| <td><a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson databind</a> and <a class="externalLink" href="https://github.com/FasterXML/jackson-dataformat-yaml">YAML data format</a></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">CSV Layout</td> |
| |
| <td><a class="externalLink" href="https://commons.apache.org/proper/commons-csv/">Apache Commons CSV</a></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">JSON Layout</td> |
| |
| <td><a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson core and databind</a></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">XML Layout</td> |
| |
| <td><a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson core, databind and dataformat XML</a><br /> |
| And <code>com.fasterxml.woodstox:woodstox-core:5.0.2</code></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">YAML Layout</td> |
| |
| <td><a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson core, databind</a> and <a class="externalLink" href="https://github.com/FasterXML/jackson-dataformat-yaml">YAML data format</a></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">Async Loggers</td> |
| |
| <td><a class="externalLink" href="https://lmax-exchange.github.io/disruptor/">LMAX Disruptor</a></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">Kafka Appender</td> |
| |
| <td><a class="externalLink" href="https://kafka.apache.org/">Kafka client library</a>. Note that you need to use a version of |
| the Kafka client library matching the Kafka server used.</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">SMTP Appender</td> |
| |
| <td>an implementation of <code>javax.mail</code></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">JMS Appender</td> |
| |
| <td>a JMS broker like <a class="externalLink" href="https://activemq.apache.org/">Apache ActiveMQ</a></td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">Windows console color support</td> |
| |
| <td><a class="externalLink" href="https://fusesource.github.io/jansi/">Jansi</a></td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">JDBC Appender</td> |
| |
| <td>a JDBC driver for the database you choose to write events to</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">JPA Appender</td> |
| |
| <td>the Java Persistence API classes, a JPA provider implementation, and a decorated |
| entity that the user implements. It also requires an appropriate JDBC driver |
| </td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">NoSQL Appender with MongoDB provider</td> |
| |
| <td>MongoDB Java Client driver and Log4j MongoDB library</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">NoSQL Appender with Apache CouchDB provider</td> |
| |
| <td>LightCouch CouchDB client library and Log4j CouchDB library</td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">Cassandra Appender</td> |
| |
| <td>Datastax Cassandra driver and Log4j Cassandra library</td> |
| </tr> |
| |
| <tr class="b"> |
| |
| <td align="left">Bzip2, Deflate, Pack200, and XZ compression on rollover</td> |
| |
| <td><a class="externalLink" href="https://commons.apache.org/proper/commons-compress/">Apache Commons Compress</a>. |
| In addition: |
| |
| <ul> |
| |
| <li>XZ requires <a class="externalLink" href="https://tukaani.org/xz/java.html">xz-java</a></li> |
| |
| <li>ZStandard requires <a class="externalLink" href="https://github.com/luben/zstd-jni">zstd-jni</a></li> |
| </ul> |
| </td> |
| </tr> |
| |
| <tr class="a"> |
| |
| <td align="left">ZeroMQ Appender</td> |
| |
| <td> |
| The ZeroMQ appender uses the <a class="externalLink" href="https://github.com/zeromq/jeromq">JeroMQ</a> library which is |
| licensed under the terms of the Mozilla Public License Version 2.0 (MPLv2). For details see the |
| file <a class="externalLink" href="https://github.com/zeromq/jeromq/blob/master/LICENSE">LICENSE</a> included with the JeroMQ |
| distribution. |
| </td> |
| </tr> |
| </table> |
| <a name="log4j-docker"></a> |
| </section><section> |
| <h4><a name="log4j-docker"></a>log4j-docker</h4> |
| |
| <p> |
| <a href="log4j-docker/index.html">Log4j Docker Support</a> requires |
| <a class="externalLink" href="https://github.com/FasterXML/jackson">Jackson annotations, core, and databind</a>. See the |
| <a href="log4j-docker/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of |
| JAR files needed. |
| </p> |
| <a name="log4j-jcl"></a> |
| </section><section> |
| <h4><a name="log4j-jcl"></a>log4j-jcl</h4> |
| |
| <p> |
| The <a href="log4j-jcl/index.html">Commons Logging Bridge</a> requires |
| <a class="externalLink" href="https://commons.apache.org/proper/commons-logging/">Commons Logging</a>. See the |
| <a href="log4j-jcl/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact |
| list of JAR files needed. |
| </p> |
| |
| <a name="log4j-1.2-api"></a> |
| </section><section> |
| <h4><a name="log4j-1.2-api"></a>log4j-1.2-api</h4> |
| |
| <p> |
| The <a href="log4j-1.2-api/index.html">Log4j 1.2 Bridge</a> has no external dependencies. |
| This only requires the Log4j API. Including Log4j Core provides optional, extra functionality. |
| </p> |
| |
| <a name="log4j-slf4j-impl"></a> |
| </section><section> |
| <h4><a name="log4j-slf4j-impl"></a>log4j-slf4j-impl</h4> |
| |
| <p> |
| The Log4j 2 <a href="log4j-slf4j-impl/index.html">SLF4J Binding</a> depends on the |
| <a class="externalLink" href="https://www.slf4j.org/">SLF4J</a> API. See the |
| <a href="log4j-slf4j-impl/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact |
| list of JAR files needed. |
| </p> |
| |
| <p class="text-warning"> |
| <i></i> |
| <b><font color="red"> |
| Do not use this with the <a href="#log4j-to-slf4j">log4j-to-slf4j</a> module. |
| </font></b> |
| </p> |
| |
| <a name="log4j-jul"></a> |
| </section><section> |
| <h4><a name="log4j-jul"></a>log4j-jul</h4> |
| |
| <p> |
| The Log4j 2 <a href="log4j-jul/index.html">Java Util Logging Adapter</a> has no external dependencies. |
| It optionally depends on the <a href="log4j-api/index.html">Log4j Core</a> library. The only required module |
| is the Log4j API. |
| </p> |
| |
| <a name="log4j-to-slf4j"></a> |
| </section><section> |
| <h4><a name="log4j-to-slf4j"></a>log4j-to-slf4j</h4> |
| |
| <p> |
| The <a href="log4j-to-slf4j/index.html">Log4j 2 to SLF4J Adapter</a> requires the |
| <a class="externalLink" href="https://www.slf4j.org/">SLF4J</a> API and an SLF4J implementation. See the |
| <a href="log4j-to-slf4j/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of JAR files needed. |
| </p> |
| |
| <p class="text-warning"> |
| <i></i> |
| <b><font color="red"> |
| Do not use this with the <a href="#log4j-slf4j-impl">log4j-slf4j-impl</a> module. |
| </font></b> |
| </p> |
| |
| <a name="log4j-flume-ng"></a> |
| </section><section> |
| <h4><a name="log4j-flume-ng"></a>log4j-flume-ng</h4> |
| |
| <p> |
| The <a href="log4j-flume-ng/index.html">Flume Appender</a> requires |
| <a class="externalLink" href="https://flume.apache.org/">Apache Flume</a> and <a class="externalLink" href="https://avro.apache.org/">Apache Avro</a>. |
| The persistent agent uses Berkeley DB. See the |
| <a href="log4j-flume-ng/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of JAR files needed. |
| </p> |
| <a name="log4j-spring-cloud-config-client"></a> |
| </section><section> |
| <h4><a name="log4j-spring-cloud-config-client"></a>log4j-spring-cloud-config-client</h4> |
| |
| <p> |
| <a href="log4j-spring-cloud-config/log4j-spring-cloud-config-client/index.html">Log4j Spring Cloud Config Client</a> requires |
| <a class="externalLink" href="https://spring.io/projects/spring-cloud-config">Spring Cloud Config</a>. |
| <a class="externalLink" href="https://spring.io/projects/spring-cloud-bus">Spring Cloud Bus</a> is required if notification of logging |
| configuration changes is desired. <a class="externalLink" href="https://spring.io/projects/spring-boot">Spring Boot</a> is required |
| but applications do not have to be packaged as a Spring Boot application. |
| <a href="log4j-spring-cloud-config/log4j-spring-cloud-config-client/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of |
| JAR files needed. |
| </p> |
| <a name="log4j-taglib"></a> |
| </section><section> |
| <h4><a name="log4j-taglib"></a>log4j-taglib</h4> |
| |
| <p> |
| The Log4j <a href="log4j-taglib/index.html">Log Tag Library</a> requires the |
| <a class="externalLink" href="https://jakarta.apache.org/taglibs/log/">Jakarta Commons Log Taglib</a> and the Servlet API. See the |
| <a href="log4j-taglib/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of JAR files needed. |
| </p> |
| |
| <a name="log4j-web"></a> |
| </section><section> |
| <h4><a name="log4j-web"></a>log4j-web</h4> |
| |
| <p> |
| The Log4j <a href="log4j-web/index.html">Web</a> module requires the Servlet API. See the |
| <a href="log4j-web/dependencies.html#Dependency_Tree">Dependency Tree</a> for the exact list of JAR files needed. |
| Note that this works with the Servlet 2.5 API as well as the Servlet 3.x API. |
| </p> |
| |
| <a name="log4j-couchdb"></a> |
| </section><section> |
| <h4><a name="log4j-couchdb"></a>log4j-couchdb</h4> |
| |
| <p> |
| The Log4J <a href="log4j-couchdb/index.html">CouchDB</a> module depends on |
| the <a class="externalLink" href="https://www.lightcouch.org/">LightCouch</a> CouchDB client library. |
| </p> |
| |
| <a name="log4j-mongodb"></a> |
| </section><section> |
| <h4><a name="log4j-mongodb"></a>log4j-mongodb</h4> |
| |
| <p> |
| The Log4J <a href="log4j-mongodb/index.html">MongoDB</a> module depends on |
| the <a class="externalLink" href="https://docs.mongodb.org/ecosystem/drivers/java/">MongoDB Java Client driver</a>. |
| </p> |
| |
| <a name="log4j-cassandra"></a> |
| </section><section> |
| <h4><a name="log4j-cassandra"></a>log4j-cassandra</h4> |
| |
| <p> |
| The Log4J <a href="log4j-cassandra/index.html">Cassandra</a> module depends on |
| the <a class="externalLink" href="https://docs.datastax.com/en/developer/driver-matrix/doc/javaDrivers.html">Datastax Cassandra driver</a>. |
| </p> |
| |
| <a name="log4j-iostreams"></a> |
| </section><section> |
| <h4><a name="log4j-iostreams"></a>log4j-iostreams</h4> |
| |
| <p> |
| The Log4j <a href="log4j-iostreams/index.html">IO Streams</a> module has no external dependencies. |
| This only requires the Log4j API. |
| </p> |
| |
| <a name="log4j-jakarta-smtp"></a> |
| </section><section> |
| <h4><a name="log4j-jakarta-smtp"></a>log4j-jakarta-smtp</h4> |
| |
| <p> |
| The Log4j Simple Mail Transfer Protocol (SMTP) Appender, version for Jakarta EE 9 module has 2 external runtime dependencies for the jakarta.activation-api and jakarta.mail-api. |
| 1. org.eclipse.angus:angus-activation |
| 2. org.eclipse.angus:jakarta.mail |
| </p> |
| |
| <a name="log4j-jakarta-web"></a> |
| </section><section> |
| <h4><a name="log4j-jakarta-web"></a>log4j-jakarta-web</h4> |
| |
| <p> |
| The Log4j <a href="log4j-jakarta-web.html">Jakarta-Web</a> module for Jakarta EE 9+ web servlet containers |
| requires the Servlet API and <code>log4j-core</code>. |
| </p> |
| |
| </section></section></section> |
| |
| |
| </main> |
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