Migrate Log4j 2.x to SLF4J 1.x

** org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1** Transforms usages of Log4j 2.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: 1.6.0
Usage
This recipe has no required configuration options and can be activated directly after taking a dependency on org.openrewrite.recipe:rewrite-logging-frameworks:1.6.0 in your build file:
Gradle
Maven
build.gradle
1
plugins {
2
    id("org.openrewrite.rewrite") version("5.20.0")
3
}
4
​
5
rewrite {
6
    activeRecipe("org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1")
7
}
8
​
9
repositories {
10
    mavenCentral()
11
}
12
​
13
dependencies {
14
    rewrite("org.openrewrite.recipe:rewrite-logging-frameworks:1.6.0")
15
}
Copied!
pom.xml
1
<project>
2
  <build>
3
    <plugins>
4
      <plugin>
5
        <groupId>org.openrewrite.maven</groupId>
6
        <artifactId>rewrite-maven-plugin</artifactId>
7
        <version>4.23.0</version>
8
        <configuration>
9
          <activeRecipes>
10
            <recipe>org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1</recipe>
11
          </activeRecipes>
12
        </configuration>
13
        <dependencies>
14
          <dependency>
15
            <groupId>org.openrewrite.recipe</groupId>
16
            <artifactId>rewrite-logging-frameworks</artifactId>
17
            <version>1.6.0</version>
18
          </dependency>
19
        </dependencies>
20
      </plugin>
21
    </plugins>
22
  </build>
23
</project>
Copied!
Recipes can also be activated directly from the command line by adding the argument -Drewrite.activeRecipes=org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1
Definition
Recipe List
Yaml Recipe List
​Change type​
oldFullyQualifiedTypeName: org.apache.logging.log4j.LogManager
newFullyQualifiedTypeName: org.slf4j.LoggerFactory
​Change method name​
methodPattern: org.apache.logging.log4j.Logger fatal(..)
newMethodName: error
​Change method name​
methodPattern: org.apache.logging.log4j.Category fatal(..)
newMethodName: error
​Change type​
oldFullyQualifiedTypeName: org.apache.logging.log4j.Logger
newFullyQualifiedTypeName: org.slf4j.Logger
​Parameterize SLF4J logging statements​
1
---
2
type: specs.openrewrite.org/v1beta/recipe
3
name: org.openrewrite.java.logging.slf4j.Log4j2ToSlf4j1
4
displayName: Migrate Log4j 2.x to SLF4J 1.x
5
description: Transforms usages of Log4j 2.x to leveraging SLF4J 1.x directly. Note, this currently does not modify `log4j.properties` files.
6
tags:
7
  - slf4j
8
  - logging
9
  - log4j
10
recipeList:
11
  - org.openrewrite.java.ChangeType:
12
      oldFullyQualifiedTypeName: org.apache.logging.log4j.LogManager
13
      newFullyQualifiedTypeName: org.slf4j.LoggerFactory
14
  - org.openrewrite.java.ChangeMethodName:
15
      methodPattern: org.apache.logging.log4j.Logger fatal(..)
16
      newMethodName: error
17
  - org.openrewrite.java.ChangeMethodName:
18
      methodPattern: org.apache.logging.log4j.Category fatal(..)
19
      newMethodName: error
20
  - org.openrewrite.java.ChangeType:
21
      oldFullyQualifiedTypeName: org.apache.logging.log4j.Logger
22
      newFullyQualifiedTypeName: org.slf4j.Logger
23
  - org.openrewrite.java.logging.slf4j.ParameterizedLogging
Copied!

Migrate Log4j 1.x to SLF4J 1.x

Migrate Log4j to SLF4J

Last modified 5d ago

Export as PDF

Copy link

Contents