Moderne licensed

Convert Log4j 1.x `MDC.getContext()` to `getCopyOfContextMap()`

Recipe IDorg.openrewrite.java.logging.slf4j.Log4j1MdcGetContextToCopyOfContextMapArtifactorg.openrewrite.recipe:rewrite-logging-frameworks

Renames Log4j 1.x org.apache.log4j.MDC.getContext() (returns Hashtable) to getCopyOfContextMap() (returns Map) at every call site, and retypes any Hashtable declaration — local variable, field, method parameter, or method return type — that receives the result, whether initialized directly from the call, directly assigned it in a later statement, or returning it, to Map<String, String>, since Map is not assignable to Hashtable. Retyping a parameter or return type changes the method's signature; overriding methods are left unchanged to avoid breaking the override, so they need a manual fix. Does not change the org.apache.log4j.MDC type; compose with a ChangeType to complete the migration.

Single 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.Log4j1MdcGetContextToCopyOfContextMap")
}

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.Log4j1MdcGetContextToCopyOfContextMap

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

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

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