Links

Migrate Log4j to SLF4J

org.openrewrite.java.logging.slf4j.Log4jToSlf4j
Migrates usage of Apache Log4j to using SLF4J directly. Use of the traditional Log4j to SLF4J bridge can result in loss of performance, as the Log4j messages must be formatted before they can be passed to SLF4J. Note, this currently does not modify log4j.properties files.

Tags

  • slf4j
  • logging
  • log4j

Source

  • groupId: org.openrewrite.recipe
  • artifactId: rewrite-logging-frameworks
  • version: 2.0.4

Usage

This recipe has no required configuration options. It can be activated by adding a dependency on org.openrewrite.recipe:rewrite-logging-frameworks:2.0.4 in your build file or by running a shell command (in which case no build changes are needed):
Gradle
Gradle init script
Maven POM
Maven Command Line
  1. 1.
    Add the following to your build.gradle file:
build.gradle
plugins {
id("org.openrewrite.rewrite") version("6.3.11")
}
rewrite {
activeRecipe("org.openrewrite.java.logging.slf4j.Log4jToSlf4j")
}
repositories {
mavenCentral()
}
dependencies {
rewrite("org.openrewrite.recipe:rewrite-logging-frameworks:2.0.4")
}
  1. 2.
    Run gradle rewriteRun to run the recipe.
  1. 1.
    Create a file named init.gradle in the root of your project.
init.gradle
initscript {
repositories {
maven { url "https://plugins.gradle.org/m2" }
}
dependencies { classpath("org.openrewrite:plugin:6.3.11") }
}
rootProject {
plugins.apply(org.openrewrite.gradle.RewritePlugin)
dependencies {
rewrite("org.openrewrite.recipe:rewrite-logging-frameworks:2.0.4")
}
rewrite {
activeRecipe("org.openrewrite.java.logging.slf4j.Log4jToSlf4j")
}
afterEvaluate {
if (repositories.isEmpty()) {
repositories {
mavenCentral()
}
}
}
}
  1. 2.
    Run gradle --init-script init.gradle rewriteRun to run the recipe.
  1. 1.
    Add the following to your pom.xml file:
pom.xml
<project>
<build>
<plugins>
<plugin>
<groupId>org.openrewrite.maven</groupId>
<artifactId>rewrite-maven-plugin</artifactId>
<version>5.5.2</version>
<configuration>
<activeRecipes>
<recipe>org.openrewrite.java.logging.slf4j.Log4jToSlf4j</recipe>
</activeRecipes>
</configuration>
<dependencies>
<dependency>
<groupId>org.openrewrite.recipe</groupId>
<artifactId>rewrite-logging-frameworks</artifactId>
<version>2.0.4</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
  1. 2.
    Run mvn rewrite:run to run the recipe.
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.Log4jToSlf4j

Definition

Recipe List
Yaml Recipe List
---
type: specs.openrewrite.org/v1beta/recipe
name: org.openrewrite.java.logging.slf4j.Log4jToSlf4j
displayName: Migrate Log4j to SLF4J
description: Migrates usage of Apache Log4j to using SLF4J directly. Use of the traditional Log4j to SLF4J bridge can result in loss of performance, as the Log4j messages must be formatted before they can be passed to SLF4J. Note, this currently does not modify `log4j.properties` files.
tags:
- slf4j
- logging
- log4j
recipeList:
- org.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1
- org.openrewrite.java.logging.slf4j.LoggersNamedForEnclosingClass
- org.openrewrite.maven.RemoveDependency:
groupId: org.apache.logging.log4j
artifactId: log4j-to-slf4j
- org.openrewrite.maven.UpgradeDependencyVersion:
groupId: org.apache.logging.log4j
artifactId: log4j-api
newVersion: latest.release
overrideManagedVersion: true
- org.openrewrite.maven.UpgradeDependencyVersion:
groupId: org.apache.logging.log4j
artifactId: log4j-core
newVersion: latest.release
overrideManagedVersion: true
- org.openrewrite.maven.AddDependency:
groupId: org.slf4j
artifactId: slf4j-api
version: latest.release
onlyIfUsing: org.apache.logging.log4j.*
- org.openrewrite.maven.AddDependency:
groupId: org.apache.logging.log4j
artifactId: log4j-slf4j-impl
version: latest.release
onlyIfUsing: org.apache.logging.log4j.*
- org.openrewrite.maven.AddDependency:
groupId: org.slf4j
artifactId: slf4j-api
version: latest.release
onlyIfUsing: org.apache.log4j.*
- org.openrewrite.maven.AddDependency:
groupId: org.apache.logging.log4j
artifactId: log4j-slf4j-impl
version: latest.release
onlyIfUsing: org.apache.log4j.*

Contributors

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