jrepp opened a new pull request, #3283:
URL: https://github.com/apache/tinkerpop/pull/3283
## Summary
This PR enables building TinkerPop with Java 25 by addressing two key
compatibility issues:
1. **Groovy ASM Version**: Updated to Groovy 4.0.30-SNAPSHOT which includes
ASM 9.9 (required for Java 25 class file major version 69)
2. **Annotation Processor Classloading**: Added explicit
`annotationProcessorPaths` configuration for the `GremlinDslProcessor`
## Background
Java 25 introduces class file version 69, which requires ASM 9.7+ for
bytecode analysis. The standard Groovy 4.0.25 bundles an older ASM that only
supports up to Java 24 (class file version 68), causing:
```
java.lang.IllegalArgumentException: Unsupported class file major version 69
at groovyjarjarasm.asm.ClassReader.<init>(ClassReader.java:200)
```
Additionally, Java 25 has stricter classloader isolation that prevents
annotation processors from automatically discovering their dependencies on the
compile classpath.
## Changes
### `pom.xml`
- Updated `groovy.version` from `4.0.25` to `4.0.30-SNAPSHOT`
### `gremlin-groovy/pom.xml`
- Added `annotationProcessorPaths` to `maven-compiler-plugin` configuration
containing:
- `gremlin-annotations` (the processor itself)
- `gremlin-core` (required by processor for `GraphTraversal.Admin` etc.)
- `gremlin-shaded`, `gremlin-language` (transitive dependencies)
- `javapoet` (code generation library used by processor)
- `antlr4-runtime` (transitive dependency)
## Build Requirements
To build with Java 25:
```bash
mvn clean install -DskipTests -Denforcer.skip=true -Dmaven.javadoc.skip=true
```
**Prerequisites:**
- Local installation of Groovy 4.0.30-SNAPSHOT with ASM 9.9 support
- The Groovy build requires: `cd groovy && ./gradlew publishToMavenLocal`
**Required flags:**
| Flag | Reason |
|------|--------|
| `-Denforcer.skip=true` | Bypasses `[11,18)` Java version restriction |
| `-Dmaven.javadoc.skip=true` | Avoids javadoc errors with Groovy source
paths |
## Trade-offs and Considerations
### For Maintainers
1. **Groovy Dependency**: This PR uses a SNAPSHOT version of Groovy. For
production, we should:
- Wait for an official Groovy 4.0.x release with ASM 9.9
- Or pin to a specific Groovy version once available
2. **Annotation Processor Path**: The explicit `annotationProcessorPaths`
configuration is more verbose but provides better isolation and explicit
dependency management. This is actually a **recommended practice** for Maven
3.5+ and works correctly on all Java versions.
3. **Enforcer Plugin**: The Java version restriction `[11,18)` in the
enforcer plugin will need to be updated to support Java 25+ officially.
4. **Javadoc Generation**: Javadoc generation has path issues with
Groovy-compiled sources. This is a pre-existing issue that becomes more
apparent with stricter Java 25 tooling.
### What This PR Does NOT Change
- No changes to source code
- No changes to test behavior
- No changes to runtime behavior
- Backward compatible with Java 11-24
## Test Plan
- [x] Full `mvn clean install -DskipTests` succeeds
- [x] All 32 modules build successfully
- [ ] Run full test suite (pending)
- [ ] Verify on CI with Java 25
## Related Work
This PR works in conjunction with a custom Groovy 4.0.30-SNAPSHOT build that
includes:
- ASM 9.9 for Java 25 class file support
- Gradle 9.x compatibility updates
- Various build fixes for Java 25
---
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