[BUG] error: package com.buf.validate does not exist

[gigi]

Description

Hi. Trying to add compiled dependencies to my java project and got dependencies' issues

Steps to Reproduce

build.gradle.kts:

...
dependencies {
    implementation(libs.liquibase.core)
    implementation(libs.spring.modulith.starter.core)
    implementation(libs.grpc.server.spring.boot.starter)
    implementation("io.grpc:grpc-core:1.64.0")
    implementation("io.grpc:grpc-stub:1.64.0")
    implementation("io.grpc:grpc-protobuf:1.64.0")
    implementation("com.google.protobuf:protobuf-java:4.27.1")
    implementation("build.buf:protovalidate:0.2.1")
}
...

buf.gen.yaml:

version: v2
managed:
  enabled: true
plugins:
  - remote: buf.build/grpc/java:v1.64.0
    out: build/src/java
    opt: '@generated=omit'
  - remote: buf.build/protocolbuffers/java
    out: build/src/java

buf.yaml:

version: v2
modules:
  - path: proto
lint:
  disallow_comment_ignores: true
  use:
    - DEFAULT
    - COMMENT_ENUM
    - COMMENT_ENUM_VALUE
    - COMMENT_FIELD
    - COMMENT_MESSAGE
    - COMMENT_ONEOF
    - COMMENT_RPC
    - COMMENT_SERVICE
deps:
  - buf.build/bufbuild/protovalidate
  - buf.build/googleapis/googleapis

 ./gradlew clean build

> Task :compileJava
.../MyServiceProto.java:161: error: package com.buf.validate does not exist
          com.buf.validate.ValidateProto.getDescriptor(),

Expected Behavior

I'd like to generate java classes using buf generate command, add dependencies and it shoud work

Actual Behavior

Broken dependencies

Screenshots/Logs

Environment

• Operating System: MacOS
• Version: 14.5 (23F79)
• Compiler/Toolchain: 21
• Protobuf Compiler & Version: 4.27.1
• Protoc-gen-validate Version:
• Protovalidate Version: 0.2.1

Possible Solution

Additional Context

Maybe I missed something?

Thanks

[pkwarren]

First off, you'll likely need to stay on 3.x version of protobuf-java (remote plugin 25.x). See #116 (comment) and grpc/grpc-java#11015 (comment) - neither the CEL interpreter or grpc-java have updated to the latest 4.x version of protobuf-java due to breaking changes.

To do so, update your buf.gen.yaml to specify remote: buf.build/protocolbuffers/java:25.3 instead of remote: buf.build/protocolbuffers/java.

Additionally, the protovalidate module specifies java_package so shouldn't be used with managed mode. The generated code is shipped with the build.buf:protovalidate artifact in the build.buf.validate package: https://github.com/bufbuild/protovalidate-java/tree/main/src/main/java/build/buf/validate. To disable managed mode, try adding this configuration under managed in your buf.gen.yaml file:

managed:
  disable:
    - module: buf.build/bufbuild/protovalidate

That should ensure that you can import the generated code from this artifact properly.

[gigi]

@pkwarren
Thanks a lot. This approach works now

version: v2
managed:
  enabled: true
  disable:
    - module: buf.build/bufbuild/protovalidate
plugins:
  - remote: buf.build/grpc/java:v1.64.0
    out: build/src/java
    opt: '@generated=omit'
  - remote: buf.build/protocolbuffers/java:v25.3
    out: build/src/java

I think this should be added to the documentation later :)