{"id":22960,"date":"2024-03-16T00:38:08","date_gmt":"2024-03-16T00:38:08","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/"},"modified":"2024-03-22T00:07:32","modified_gmt":"2024-03-22T00:07:32","slug":"how-to-customize-log-levels-in-logback","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/","title":{"rendered":"How to customize log levels in logback?"},"content":{"rendered":"<p>To customize the log level, you can add a custom logger to the Logback configuration file and set its level.<\/p>\n<p>To start with, define a custom logger in the configuration file of Logback (usually logback.xml).<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">configuration<\/span>&gt;<\/span>\r\n  ...\r\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">logger<\/span> <span class=\"hljs-attr\">name<\/span>=<span class=\"hljs-string\">\"com.example.custom\"<\/span> <span class=\"hljs-attr\">level<\/span>=<span class=\"hljs-string\">\"DEBUG\"<\/span> <span class=\"hljs-attr\">additivity<\/span>=<span class=\"hljs-string\">\"false\"<\/span>&gt;<\/span>\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">appender-ref<\/span> <span class=\"hljs-attr\">ref<\/span>=<span class=\"hljs-string\">\"STDOUT\"<\/span> \/&gt;<\/span>\r\n  <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">logger<\/span>&gt;<\/span>\r\n  ...\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">configuration<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>In the configuration above, the &#8220;name&#8221; attribute of the &#8220;logger&#8221; element specifies the name of the custom logger, the &#8220;level&#8221; attribute specifies the log level (DEBUG), and the &#8220;additivity&#8221; attribute is used to control whether log events are passed to the ancestor logger (set to false here, indicating not to pass to other loggers).<\/p>\n<p>Then, you can use a custom logger in the code, such as:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">import<\/span> org.slf4j.Logger;\r\n<span class=\"hljs-keyword\">import<\/span> org.slf4j.LoggerFactory;\r\n\r\n<span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">class<\/span> <span class=\"hljs-title class_\">MyApp<\/span> {\r\n  <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">Logger<\/span> <span class=\"hljs-variable\">logger<\/span> <span class=\"hljs-operator\">=<\/span> LoggerFactory.getLogger(MyApp.class);\r\n  <span class=\"hljs-keyword\">private<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">final<\/span> <span class=\"hljs-type\">Logger<\/span> <span class=\"hljs-variable\">customLogger<\/span> <span class=\"hljs-operator\">=<\/span> LoggerFactory.getLogger(<span class=\"hljs-string\">\"com.example.custom\"<\/span>);\r\n  \r\n  <span class=\"hljs-keyword\">public<\/span> <span class=\"hljs-keyword\">static<\/span> <span class=\"hljs-keyword\">void<\/span> <span class=\"hljs-title function_\">main<\/span><span class=\"hljs-params\">(String[] args)<\/span> {\r\n    logger.debug(<span class=\"hljs-string\">\"This is a debug message\"<\/span>);\r\n    customLogger.debug(<span class=\"hljs-string\">\"This is a custom debug message\"<\/span>);\r\n  }\r\n}\r\n<\/code><\/pre>\n<p>In the above code, obtain a custom logger by calling LoggerFactory.getLogger(&#8220;com.example.custom&#8221;) method, then use debug level methods to log.<\/p>\n<p>In this way, the log level of the custom logger is set to DEBUG. Different levels can be set in the configuration file as needed.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To customize the log level, you can add a custom logger to the Logback configuration file and set its level. To start with, define a custom logger in the configuration file of Logback (usually logback.xml). &lt;configuration&gt; &#8230; &lt;logger name=&#8221;com.example.custom&#8221; level=&#8221;DEBUG&#8221; additivity=&#8221;false&#8221;&gt; &lt;appender-ref ref=&#8221;STDOUT&#8221; \/&gt; &lt;\/logger&gt; &#8230; &lt;\/configuration&gt; In the configuration above, the &#8220;name&#8221; attribute of [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[],"class_list":["post-22960","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to customize log levels in logback? - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"How to customize log levels in logback?\" \/>\n<meta property=\"og:description\" content=\"To customize the log level, you can add a custom logger to the Logback configuration file and set its level. To start with, define a custom logger in the configuration file of Logback (usually logback.xml). &lt;configuration&gt; ... &lt;logger name=&quot;com.example.custom&quot; level=&quot;DEBUG&quot; additivity=&quot;false&quot;&gt; &lt;appender-ref ref=&quot;STDOUT&quot; \/&gt; &lt;\/logger&gt; ... &lt;\/configuration&gt; In the configuration above, the &#8220;name&#8221; attribute of [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\" \/>\n<meta property=\"og:site_name\" content=\"Blog - Silicon Cloud\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/SiliCloudGlobal\/\" \/>\n<meta property=\"article:published_time\" content=\"2024-03-16T00:38:08+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2024-03-22T00:07:32+00:00\" \/>\n<meta name=\"author\" content=\"Emily Johnson\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:site\" content=\"@SiliCloudGlobal\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Emily Johnson\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\"},\"author\":{\"name\":\"Emily Johnson\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/#\/schema\/person\/3b041b19cffc258705478ecfab895378\"},\"headline\":\"How to customize log levels in logback?\",\"datePublished\":\"2024-03-16T00:38:08+00:00\",\"dateModified\":\"2024-03-22T00:07:32+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\"},\"wordCount\":157,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/www.silicloud.com\/blog\/#organization\"},\"inLanguage\":\"en-US\"},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\",\"url\":\"https:\/\/www.silicloud.com\/blog\/how-to-customize-log-levels-in-logback\/\",\"name\":\"How to customize log levels in logback? 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