Modernise to Java 25, standalone POM and lz4-java xxHash32

See See https://lz4.github.io/lz4-java/1.3.0/xxhash-benchmark for
choice of xxHash32 via JNI over alternatives.

Author: bp-alex

.github/workflows/maven.yml

@@ -8,27 +8,27 @@ on:
 
 jobs:
   build:
-    name: Java 11 Build and Verify
+    name: Java LTS Build and Verify
     runs-on: ubuntu-latest
 
     steps:
     - name: Check out Git repository
-      uses: actions/checkout@v3
+      uses: actions/checkout@v5
 
-    - name: Set up Java and Maven
-      uses: actions/setup-java@v3
+    - name: Set up JDK
+      uses: actions/setup-java@v5
       with:
-        distribution: zulu
-        java-version: 11
+        java-version: '25'
+        distribution: 'temurin'
         cache: maven
 
-    - name: Setup HTTPS mirror proxy for Maven Central (due to Chroncile Map POM)
-      uses: s4u/maven-settings-action@v2.8.0
-      with:
-        mirrors: '[{"id": "central-https-mirror", "name": "HTTPS Mirror of Maven Central", "mirrorOf": "central", "url": "https://repo1.maven.org/maven2"}]'
-
     - name: Build with Maven
       run: mvn -B verify
 
     - name: Simple benchmark test
-      run: java -jar target/benchmarks.jar -foe true -wi 0 -i 1 -f 1 -p num=512
+      run: |
+        java --add-opens java.base/java.lang.reflect=ALL-UNNAMED \
+             --add-opens java.base/java.nio=ALL-UNNAMED \
+             --add-opens java.base/sun.nio.ch=ALL-UNNAMED \
+             --add-exports java.base/jdk.internal.misc=ALL-UNNAMED \
+             -jar target/benchmarks.jar -foe true -wi 0 -i 1 -f 1 -p num=512

.gitignore

@@ -12,3 +12,5 @@ bin
 *.tag
 *.next
 *.jfr
+pom.xml.versionsBackup
+dependency-reduced-pom.xml

README.md

@@ -47,13 +47,29 @@ consistent, some libraries offer non-obvious tuning settings or usage patterns
 that might further reduce their latency. We do not claim we have exhausted
 every tuning option every library exposes, but pull requests are most welcome.
 
+## Build
+
+Clone this repository and build:
+
+```bash
+mvn clean package
+```
+
 ## Usage
+
 This benchmark uses POSIX calls to accurately determine consumed disk space and
 only depends on Linux-specific native library wrappers where a range of such
 wrappers exists. Operation on non-Linux operating systems is unsupported.
 
-1. Clone this repository and `mvn clean package`
-2. Run the benchmark with `java -jar target/benchmarks.jar`
+Run the benchmark:
+
+```bash
+java --add-opens java.base/java.lang.reflect=ALL-UNNAMED \
+     --add-opens java.base/java.nio=ALL-UNNAMED \
+     --add-opens java.base/sun.nio.ch=ALL-UNNAMED \
+     --add-exports java.base/jdk.internal.misc=ALL-UNNAMED \
+     -jar target/benchmarks.jar
+```
 
 The benchmark offers many parameters, but to reduce execution time they default
 to a fast, mechanically-sympathetic workload (ie integer keys, sequential IO)
@@ -79,6 +95,14 @@ sparse files are typical), but the actual on-disk space used. The underlying
 storage location defaults to the temporary file system. To force an alternate
 location, invoke Java with `-Djava.io.tmpdir=/somewhere/you/like`.
 
+## Version Management
+
+Update all dependency and plugin versions:
+
+```bash
+mvn versions:update-properties
+```
+
 ## Support
 
 Please [open a GitHub issue](https://github.com/lmdbjava/benchmarks/issues)