Switch to 2.25.0-SNAPSHOT

Author: ppkarwasz

.github/workflows/graalvm-test.yaml

@@ -30,8 +30,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        backend: [ jul, log4j-core, logback, simple]
-        log4j-version: [ "2.24.1" ]
+        backend: [ jul, log4j-core-minimal, log4j-core, logback, simple]
+        log4j-version: [ "2.25.0-SNAPSHOT" ]
     uses: apache/logging-log4j-samples/.github/workflows/graalvm-reusable-test.yaml@main
     with:
       backend: ${{ matrix.backend }}

log4j-samples-graalvm/README.adoc

@@ -33,7 +33,10 @@ In order to use it:
 where `<backend>` can be:
 
 `log4j-core`::
-This profile uses Log4j Core as logging backend.
+This profile uses Log4j Core as logging backend with its out-of-the-box reachability metadata.
+
+`log4j-core-minimal`::
+This profile uses Log4j Core a logging backend with an external reachability metadata source optimized for size.
 
 `logback`::
 This profile uses Logback as logging backend.
@@ -95,25 +98,25 @@ Using GraalVM 21.0.4 on Linux x64, the native binaries have the following size:
 ====
 Since this is a trivial Java application, the difference between the binary size without and with Log4j is large: when Log4j is added GraalVM must compile many additional `java.base` classes.
 
-In a typical application those classes are already required, so the difference should be smaller.
+In a typical application, those classes are already required, so the difference should be smaller.
 ====
 
 [cols="1,1"]
 |===
 | Configuration | Size
 
-| With Log4j Core (minimal reachability metadata)
-| 36.13 MiB
+| With Log4j Core (manually optimized reachability metadata)
+| 36.19 MiB
 
-| With Log4j Core (full reachability metadata)
-| Unknown (≥ 38.5 MiB)
+| With Log4j Core (embedded full reachability metadata)
+| 46.80 MiB
 
 | With Logback
-| 30.59 MiB
+| 30.62 MiB
 
 | With `java.util.logging`
-| 14.03 MiB
+| 14.10 MiB
 
 | With `SimpleLogger`
-| 13.84 MiB
+| 13.90 MiB
 |===

log4j-samples-graalvm/pom.xml

@@ -43,7 +43,7 @@
     <!-- Dependencies (alphabetical) -->
     <assertj.version>3.26.3</assertj.version>
     <junit.version>5.11.1</junit.version>
-    <log4j.version>2.24.1</log4j.version>
+    <log4j.version>2.25.0-SNAPSHOT</log4j.version>
     <logback.version>1.5.8</logback.version>
     <slf4j.version>2.0.16</slf4j.version>
 
@@ -291,10 +291,10 @@
     </profile>
 
     <!--
-      ~ Enable this profile to use Log4j Core as logging implementation.
+      ~ Enable this profile to use Log4j Core as logging implementation with a manually crafted metadata file.
       -->
     <profile>
-      <id>use-log4j-core</id>
+      <id>use-log4j-core-minimal</id>
 
       <properties>
         <integration-tests-include>**/StandardIT.class</integration-tests-include>
@@ -311,12 +311,17 @@
       <build>
         <plugins>
           <!--
-            ~ Log4j Core needs additional metadata
+            ~ Use a different source of Log4j Core metadata.
             -->
           <plugin>
             <groupId>org.graalvm.buildtools</groupId>
             <artifactId>native-maven-plugin</artifactId>
             <configuration>
+              <buildArgs>
+                <arg>--exclude-config</arg>
+                <arg>log4j-core.*jar</arg>
+                <arg>META-INF/native-image/org\.apache\.logging\.log4j/log4j-core/reflect-config\.json</arg>
+              </buildArgs>
               <metadataRepository>
                 <enabled>true</enabled>
                 <localPath>${project.basedir}/src/reachability-metadata/minimal</localPath>
@@ -327,6 +332,25 @@
       </build>
     </profile>
 
+    <!--
+      ~ Enable this profile to use Log4j Core as logging implementation with a full metadata file.
+      -->
+    <profile>
+      <id>use-log4j-core</id>
+
+      <properties>
+        <integration-tests-include>**/StandardIT.class</integration-tests-include>
+      </properties>
+
+      <dependencies>
+        <dependency>
+          <groupId>org.apache.logging.log4j</groupId>
+          <artifactId>log4j-core</artifactId>
+          <scope>runtime</scope>
+        </dependency>
+      </dependencies>
+    </profile>
+
     <!--
       ~ Enable this profile to use Logback as logging implementation.
       -->
@@ -383,21 +407,6 @@
 
       <build>
         <plugins>
-          <!--
-            ~ SimpleLog needs a configuration file
-            -->
-          <plugin>
-            <groupId>org.graalvm.buildtools</groupId>
-            <artifactId>native-maven-plugin</artifactId>
-            <configuration>
-              <metadataRepository>
-                <enabled>true</enabled>
-              </metadataRepository>
-              <buildArgs>
-                <arg>-H:IncludeResources=log4j2.simplelog.properties</arg>
-              </buildArgs>
-            </configuration>
-          </plugin>
           <!--
             ~ SimpleLogger needs some system properties
             -->