Migrate Log4j 1.x to SLF4J 1.x

org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1
Transforms usages of Log4j 1.x to leveraging SLF4J 1.x directly. Note, this currently does not modify log4j.properties files.
Tags
slf4j
logging
log4j
Source
​Github, Issue Tracker, Maven Central​
groupId: org.openrewrite.recipe
artifactId: rewrite-logging-frameworks
version: 1.20.1
Usage
This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-logging-frameworks:1.20.1 in your build file or by running a shell command (in which case no build changes are needed):
Gradle
Maven POM
Maven Command Line
build.gradle
plugins {
    id("org.openrewrite.rewrite") version("5.40.4")
}
​
rewrite {
    activeRecipe("org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1")
}
​
repositories {
    mavenCentral()
}
​
dependencies {
    rewrite("org.openrewrite.recipe:rewrite-logging-frameworks:1.20.1")
}
pom.xml
<project>
  <build>
    <plugins>
      <plugin>
        <groupId>org.openrewrite.maven</groupId>
        <artifactId>rewrite-maven-plugin</artifactId>
        <version>4.45.0</version>
        <configuration>
          <activeRecipes>
            <recipe>org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1</recipe>
          </activeRecipes>
        </configuration>
        <dependencies>
          <dependency>
            <groupId>org.openrewrite.recipe</groupId>
            <artifactId>rewrite-logging-frameworks</artifactId>
            <version>1.20.1</version>
          </dependency>
        </dependencies>
      </plugin>
    </plugins>
  </build>
</project>
shell
mvn -U org.openrewrite.maven:rewrite-maven-plugin:run \
  -Drewrite.recipeArtifactCoordinates=org.openrewrite.recipe:rewrite-logging-frameworks:RELEASE \
  -Drewrite.activeRecipes=org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1
Definition
Recipe List
Yaml Recipe List
​Change type​
oldFullyQualifiedTypeName: org.apache.log4j.MDC
newFullyQualifiedTypeName: org.slf4j.MDC
​Migrate Log4j 1.x to Log4j 2.x​
​Migrate Log4j 2.x to SLF4J 1.x​
​Parameterize SLF4J logging statements​
---
type: specs.openrewrite.org/v1beta/recipe
name: org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1
displayName: Migrate Log4j 1.x to SLF4J 1.x
description: Transforms usages of Log4j 1.x to leveraging SLF4J 1.x directly. Note, this currently does not modify `log4j.properties` files.
tags:
  - slf4j
  - logging
  - log4j
recipeList:
  - org.openrewrite.java.ChangeType:
      oldFullyQualifiedTypeName: org.apache.log4j.MDC
      newFullyQualifiedTypeName: org.slf4j.MDC
  - org.openrewrite.java.logging.log4j.Log4j1ToLog4j2
  - org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1
  - org.openrewrite.java.logging.slf4j.ParameterizedLogging
​
See how this recipe works across multiple open-source repositories
​​
​​
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Loggers should be named for their enclosing classes

Migrate Log4j 2.x to SLF4J 1.x

Last modified 21d ago