https://logging.staged.apache.org/log4j/transform/log4j-converter-config.html" rel="nofollow">https://logging.staged.apache.org/log4j/transform/log4j-converter-config.html) to add a `Log4j1ConfigurationToLog4jCore2` rule, which converts `log4j.properties` and `log4j.xml` configuration files into the equivalent `log4j2.xml` configuration files. It also refactors the `Log4j1toLog4j2` recipe into three parts: - `Log4j1toLog4jAPI` performs the migration from the "Log4j 1 API" to Log4j API 2, as described in [Log4j 1 API migration](https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html#api-migration). This recipe performs almost exclusively Java code changes and is usually not required in applications that use JCL or SLF4J as logging interface. - `Log4j1ConfigurationToLog4jCore2` migrates configuration files, as described in the [Log4j 1 Configuration file migration](https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html#configuration-file-migration) section. - `Log4j1ToLog4jCore2` migrates the runtime dependencies to use Log4j Core 2 instead of Log4j 1, as described in [Log4j 1 Backend migration](https://logging.apache.org/log4j/2.x/migrate-from-log4j1.html#backend-migration) and also calls the previous recipe. This is probably the most useful recipe for users that no longer user Log4j 1 directly, but use it as logging implementation. Closes openrewrite#154. Related to apache/logging-log4j2#3220

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Commits on Dec 18, 2024

Add Log4j 1 to Log4j 2 configuration file conversion

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Commits on Dec 19, 2024

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