proto: adding java support proto libraries (#35092)

precursor to https://github.com/envoyproxy/envoy/pull/35021

Risk Level: low
Testing: n/a
Docs Changes: n/a
Release Notes: n/a

---------

Signed-off-by: Alyssa Wilk <alyssar@chromium.org>

Mirrored from https://github.com/envoyproxy/envoy @ 25159be955f85bb276ce3649547fbed6ae11b3e2

bazel/api_build_system.bzl

@@ -22,6 +22,7 @@ _CC_PROTO_DESCRIPTOR_SUFFIX = "_cc_proto_descriptor"
 _CC_GRPC_SUFFIX = "_cc_grpc"
 _GO_PROTO_SUFFIX = "_go_proto"
 _GO_IMPORTPATH_PREFIX = "github.com/envoyproxy/go-control-plane/"
+_JAVA_PROTO_SUFFIX = "_java_proto"
 
 _COMMON_PROTO_DEPS = [
     "@com_google_protobuf//:any_proto",
@@ -67,7 +68,8 @@ def api_cc_py_proto_library(
         srcs = [],
         deps = [],
         linkstatic = 0,
-        has_services = 0):
+        has_services = 0,
+        java = True):
     relative_name = ":" + name
     proto_library(
         name = name,
@@ -109,6 +111,13 @@ def api_cc_py_proto_library(
         visibility = ["//visibility:public"],
     )
 
+    if java:
+        native.java_proto_library(
+            name = name + _JAVA_PROTO_SUFFIX,
+            visibility = ["//visibility:public"],
+            deps = [relative_name],
+        )
+
     # Optionally define gRPC services
     if has_services:
         # TODO: when Python services are required, add to the below stub generations.

bazel/repositories.bzl

@@ -16,6 +16,9 @@ def api_dependencies():
     external_http_archive(
         name = "bazel_skylib",
     )
+    external_http_archive(
+        name = "rules_jvm_external",
+    )
     external_http_archive(
         name = "com_envoyproxy_protoc_gen_validate",
         patch_args = ["-p1"],

bazel/repository_locations.bzl

@@ -34,6 +34,19 @@ REPOSITORY_LOCATIONS_SPEC = dict(
         license = "Apache-2.0",
         license_url = "https://github.com/bufbuild/protoc-gen-validate/blob/v{version}/LICENSE",
     ),
+    rules_jvm_external = dict(
+        project_name = "Java Rules for Bazel",
+        project_desc = "Bazel rules for Java",
+        project_url = "https://github.com/bazelbuild/rules_jvm_external",
+        version = "6.1",
+        strip_prefix = "rules_jvm_external-{version}",
+        sha256 = "08ea921df02ffe9924123b0686dc04fd0ff875710bfadb7ad42badb931b0fd50",
+        urls = ["https://github.com/bazelbuild/rules_jvm_external/releases/download/{version}/rules_jvm_external-{version}.tar.gz"],
+        release_date = "2024-04-26",
+        use_category = ["build"],
+        license = "Apache-2.0",
+        license_url = "https://github.com/bazelbuild/rules_jvm_external/blob/{version}/LICENSE",
+    ),
     com_github_cncf_xds = dict(
         project_name = "xDS API",
         project_desc = "xDS API Working Group (xDS-WG)",