Moderne licensed

Migrate Log4j to SLF4J

Recipe IDorg.openrewrite.java.logging.slf4j.Log4jToSlf4jArtifactorg.openrewrite.recipe:rewrite-logging-frameworks

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.

Composite recipeslf4jlogginglog4jMSAL

Add to your build

Get a download tokenThis recipe is Moderne licensed, so the token must belong to a Moderne customer. It replaces YOUR_DOWNLOAD_TOKEN below.

~/.gradle/gradle.properties

codeGenomeUsername=you@example.com
codeGenomeToken=YOUR_DOWNLOAD_TOKEN

build.gradle.kts

plugins {
    id("org.openrewrite.rewrite") version("latest.release")
}

rewrite {
    activeRecipe("org.openrewrite.java.logging.slf4j.Log4jToSlf4j")
}

repositories {
    mavenCentral()
    maven {
        url = uri("https://artifacts.codegenomeproject.org/maven")
        credentials {
            username = providers.gradleProperty("codeGenomeUsername").get()
            password = providers.gradleProperty("codeGenomeToken").get()
        }
    }
}

dependencies {
    rewrite("org.openrewrite.recipe:rewrite-logging-frameworks:3.34.0")
}

Then run

./gradlew rewriteRun

Usage

This recipe has no required configuration options. You’ll need the Moderne CLI configured before running the command below.

mod run . --recipe org.openrewrite.java.logging.slf4j.Log4jToSlf4j

If the recipe isn’t available locally, install it with:

mod config recipes jar install org.openrewrite.recipe:rewrite-logging-frameworks:RELEASE

Definition

This recipe runs the following recipes in order.

Migrate Log4j 1.x to SLF4J 1.xorg.openrewrite.java.logging.slf4j.Log4j1ToSlf4j1
Loggers should be named for their enclosing classesorg.openrewrite.java.logging.slf4j.LoggersNamedForEnclosingClass
Upgrade Gradle or Maven dependency versionsorg.openrewrite.java.dependencies.UpgradeDependencyVersion
Upgrade Gradle or Maven dependency versionsorg.openrewrite.java.dependencies.UpgradeDependencyVersion
Add Gradle or Maven dependencyorg.openrewrite.java.dependencies.AddDependency
Add Gradle or Maven dependencyorg.openrewrite.java.dependencies.AddDependency
Add Gradle or Maven dependencyorg.openrewrite.java.dependencies.AddDependency
Add Gradle or Maven dependencyorg.openrewrite.java.dependencies.AddDependency
Change Gradle or Maven dependency org.apache.logging.log4j:log4j-slf4j-implorg.openrewrite.java.dependencies.ChangeDependency

Data tables

Structured output this recipe can produce.

Source files that had resultsSource files that were modified by the recipe run.org.openrewrite.table.SourcesFileResults
Source files that had search resultsSearch results that were found during the recipe run.org.openrewrite.table.SearchResults
Source files that errored on a recipeThe details of all errors produced by a recipe run.org.openrewrite.table.SourcesFileErrors
Recipe performanceStatistics used in analyzing the performance of recipes.org.openrewrite.table.RecipeRunStats