{"id":194,"date":"2022-03-30T15:32:08","date_gmt":"2022-03-30T15:32:08","guid":{"rendered":"https:\/\/vkrastev1blog.com\/?p=194"},"modified":"2022-03-31T13:31:11","modified_gmt":"2022-03-31T13:31:11","slug":"java-configure-log4j2-in-your-project","status":"publish","type":"post","link":"https:\/\/vkrastev1blog.com\/2022\/03\/30\/java-configure-log4j2-in-your-project\/","title":{"rendered":"Java configure Log4j2 in your Project"},"content":{"rendered":"\n
  1. Log4j2 and SLF4j Binding Dependencies
    To make Log4j2 work with SLF4J, we need to include the following 3 dependencies.
    log4j-slf4j-impl.jar \u2013 Log4j 2 SLF4J binding. It allows applications coded to the SLF4J API to use Log4j2 as the implementation.
    log4j-api.jar \u2013 provides the adapter components required for implementers to create a logging implementation.
    log4j-core.jar \u2013 core Log4j Implementation classes.
    The Maven and Gradle dependencies can be copied as below.
    pom.xml<\/li><\/ol>\n\n\n\n

    <dependency>
    <groupId>org.apache.logging.log4j<\/groupId>
    <artifactId>log4j-api<\/artifactId>
    <version>2.15.0<\/version> <\/dependency>
    <dependency>
    <groupId>org.apache.logging.log4j<\/groupId>
    <artifactId>log4j-core<\/artifactId>
    <version>2.15.0<\/version>
    <\/dependency> <dependency>
    <groupId>org.apache.logging.log4j<\/groupId>
    <artifactId>log4j-slf4j-impl<\/artifactId>
    <version>2.15.0<\/version>
    <\/dependency><\/p>\n\n\n\n

    1. Create File log4j2.xml in your Project resources folder
      Example with file rolling and using system variables and made for use under wildfly server:<\/li><\/ol>\n\n\n\n

      <?xml version=”1.0″ encoding=”UTF-8″?>
      <Configuration status=”${env:LOG_LEVEL}”>
      <Appenders>
      <RollingFile name=”LogToFile” fileName=”${env:JBOSS_HOME}\/standalone\/log\/xxx.log” filePattern=”${env:JBOSS_HOME}\/standalone\/log\/xxx.log-%d{yyyy-MM-dd}”> <PatternLayout>
      <pattern>[%-5level] %d{yyyy-MM-dd HH:mm:ss.SSS} [%t] %c{1} – %msg%n <\/pattern> <\/PatternLayout>
      <Policies>
      <TimeBasedTriggeringPolicy interval=”1″ modulate=”true” \/>
      <OnStartupTriggeringPolicy \/>
      <\/Policies> <!– Max 10 files will be created everyday –>
      <DefaultRolloverStrategy max=”20″>
      <Delete basePath=”${env:JBOSS_HOME}\/standalone\/log\/” maxDepth=”10″>
      <!– Delete all files older than 30 days –>
      <IfLastModified age=”30d” \/>
      <\/Delete>
      <\/DefaultRolloverStrategy>
      <\/RollingFile>
      <\/Appenders>
      <Loggers>
      <!– avoid duplicated logs with additivity=false –>
      <Logger name=”xxx-be” level=”${env:LOG_LEVEL}” additivity=”false”> <AppenderRef ref=”LogToFile”\/>
      <\/Logger>
      <Root level=”${env:LOG_LEVEL}”>
      <AppenderRef ref=”LogToFile”\/>
      <\/Root>
      <\/Loggers>
      <\/Configuration><\/p>\n\n\n\n

      1. log4j2.xml<\/li>
      2. Using Logger in Code
        import org.apache.logging.log4j.Logger;
        Logger logger = LogManager.getLogger(“xxx-be”);
        logger.info(“started”);<\/li><\/ol>\n\n\n\n

        I needed whole day to make it work I hope this will help developers.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Log4j2 and SLF4j Binding Dependencies To make Log4j2 work with SLF4J, we need to include the following 3 dependencies. log4j-slf4j-impl.jar \u2013 Log4j 2 SLF4J binding. It allows applications coded to the SLF4J API to use Log4j2 as the implementation.log4j-api.jar \u2013 provides the adapter components required for implementers to create a logging implementation.log4j-core.jar \u2013 core Log4j Implementation […]<\/p>\n","protected":false},"author":65283547,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"jetpack_seo_schema_type":"","_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_wpcom_ai_launchpad_first_post":false,"_jetpack_hide_featured_image":false,"_jetpack_featured_image_duplicate_dismissed":0,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":false,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[1017],"tags":[731731598,177442530,731731587,731731575,731731561],"class_list":["post-194","post","type-post","status-publish","format-standard","hentry","category-java","tag-configure-log4j2","tag-log4j2","tag-log4j2-under-wildfly","tag-log4j2-using-environment-variable","tag-log4j2-using-system-variable"],"jetpack_publicize_connections":[],"jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p4CoHV-38","jetpack-related-posts":[],"jetpack_likes_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/posts\/194","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/users\/65283547"}],"replies":[{"embeddable":true,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/comments?post=194"}],"version-history":[{"count":11,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/posts\/194\/revisions"}],"predecessor-version":[{"id":207,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/posts\/194\/revisions\/207"}],"wp:attachment":[{"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/media?parent=194"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/categories?post=194"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vkrastev1blog.com\/wp-json\/wp\/v2\/tags?post=194"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}