udf/worker/grpc/pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<!--
  ~ Licensed to the Apache Software Foundation (ASF) under one or more
  ~ contributor license agreements.  See the NOTICE file distributed with
  ~ this work for additional information regarding copyright ownership.
  ~ The ASF licenses this file to You under the Apache License, Version 2.0
  ~ (the "License"); you may not use this file except in compliance with
  ~ the License.  You may obtain a copy of the License at
  ~
  ~    http://www.apache.org/licenses/LICENSE-2.0
  ~
  ~ Unless required by applicable law or agreed to in writing, software
  ~ distributed under the License is distributed on an "AS IS" BASIS,
  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  ~ See the License for the specific language governing permissions and
  ~ limitations under the License.
  -->

<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0
                             http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>org.apache.spark</groupId>
    <artifactId>spark-parent_2.13</artifactId>
    <version>5.0.0-SNAPSHOT</version>
    <relativePath>../../../pom.xml</relativePath>
  </parent>

  <artifactId>spark-udf-worker-grpc_2.13</artifactId>
  <packaging>jar</packaging>
  <name>Spark Project UDF Worker gRPC</name>
  <url>https://spark.apache.org/</url>

  <properties>
    <sbt.project.name>udf-worker-grpc</sbt.project.name>
  </properties>

  <!--
    Home for the gRPC-based UDF worker transport. The gRPC service stubs are
    generated here (from the proto module's service definitions) and the gRPC
    runtime is confined to this module, so spark-udf-worker-proto / -core and
    their consumers (core, catalyst, sql/core) stay free of any gRPC
    transitive dependency. (protobuf-java remains a transitive dependency of
    those modules via the proto messages, as it was before; only gRPC is
    removed from their classpath.)

    Note: gRPC is kept off every shared classpath by the dependency graph
    alone, since nothing on the runtime/assembly classpath depends on this
    module yet. The gRPC runtime here is NOT shaded. Once the gRPC transport
    is wired up and a runtime module depends on this one, the io.grpc and
    protobuf classes should be relocated (mirroring the
    org.sparkproject.spark_udf_worker.protobuf relocation in the proto module)
    to avoid version clashes with Spark Connect's gRPC. That shading is
    deferred to a follow-up.
  -->
  <dependencies>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-tags_${scala.binary.version}</artifactId>
    </dependency>
    <dependency>
      <groupId>org.apache.spark</groupId>
      <artifactId>spark-udf-worker-proto_${scala.binary.version}</artifactId>
      <version>${project.version}</version>
    </dependency>
    <dependency>
      <groupId>org.scala-lang</groupId>
      <artifactId>scala-library</artifactId>
    </dependency>
    <dependency>
      <groupId>com.google.protobuf</groupId>
      <artifactId>protobuf-java</artifactId>
      <scope>compile</scope>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-api</artifactId>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-protobuf</artifactId>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-stub</artifactId>
    </dependency>
    <dependency>
      <groupId>io.grpc</groupId>
      <artifactId>grpc-inprocess</artifactId>
      <scope>test</scope>
    </dependency>
  </dependencies>

  <build>
    <outputDirectory>target/scala-${scala.binary.version}/classes</outputDirectory>
    <testOutputDirectory>target/scala-${scala.binary.version}/test-classes</testOutputDirectory>
    <plugins>
      <plugin>
        <groupId>eu.maveniverse.maven.plugins</groupId>
        <artifactId>nisse-plugin3</artifactId>
        <version>0.7.0</version>
        <executions>
          <execution>
            <id>set-os-detector-properties</id>
            <goals>
              <goal>inject-properties</goal>
            </goals>
            <phase>validate</phase>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.xolstice.maven.plugins</groupId>
        <artifactId>protobuf-maven-plugin</artifactId>
        <version>0.6.1</version>
        <!--
          Generate only the gRPC service stubs (compile-custom). The protobuf
          message classes are generated by and consumed from
          spark-udf-worker-proto; the .proto source root points at that module
          so protoc can resolve imports while emitting only the grpc-java output.
        -->
        <configuration>
          <protocArtifact>com.google.protobuf:protoc:${protobuf.version}:exe:${os.detected.classifier}</protocArtifact>
          <pluginId>grpc-java</pluginId>
          <pluginArtifact>io.grpc:protoc-gen-grpc-java:${io.grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
          <protoSourceRoot>${project.basedir}/../proto/src/main/protobuf</protoSourceRoot>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>compile-custom</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>net.alchim31.maven</groupId>
        <artifactId>scala-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </build>
</project>