There are three logging categories: category1, category1.

The two-argumentLogger.getLogger()method accepts afile-name prefixfollowed by alogging category. Here,loggerFileis the requested custom file-name prefix andcategory1.euis the category.

Salesforce ' s Script API defines the signature asLogger.getLogger(fileNamePrefix, category). Custom log files created through this mechanism are stored as custom logs, so their actual generated filename begins with thecustom-naming convention followed by the developer-supplied prefix. Salesforce also states that repeated calls using the same file-name prefix use the same associated custom logger/file.

The WARN message passes filtering becausecategory1.euinherits its logging threshold from parent categorycategory1, which is enabled at WARN. B2C Commerce custom logging is hierarchical, so parent-category rules apply to descendant categories unless overridden.

Therefore, the WARN entry is written to the custom log beginning withcustom-loggerFile.

Study Guide reference:Application Development — Logger file prefixes, custom log files, category inheritance, WARN filtering, andLogger.getLogger().

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