Add autoconfiguration for gRPC servlet

samples/grpc-tomcat/README.md

@@ -0,0 +1,61 @@
+# Spring Boot gRPC Sample
+
+This project is a copy one of the samples from the [gRPC Spring Boot Starter](https://github.com/yidongnan/grpc-spring-boot-starter/blob/master/examples/local-grpc-server/build.gradle). Build and run any way you like to run Spring Boot. E.g:
+
+```
+$ ./mvnw spring-boot:run
+...
+  .   ____          _            __ _ _
+ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
+( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
+ \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
+  '  |____| .__|_| |_|_| |_\__, | / / / /
+ =========|_|==============|___/=/_/_/_/
+ :: Spring Boot ::                (v3.0.0)
+
+2022-12-08T05:32:24.934-08:00  INFO 551632 --- [           main] com.example.demo.DemoApplication         : Starting DemoApplication using Java 17.0.5 with PID 551632 (/home/dsyer/dev/scratch/demo/target/classes started by dsyer in /home/dsyer/dev/scratch/demo)
+2022-12-08T05:32:24.938-08:00  INFO 551632 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to 1 default profile: "default"
+2022-12-08T05:32:25.377-08:00  WARN 551632 --- [           main] ocalVariableTableParameterNameDiscoverer : Using deprecated '-debug' fallback for parameter name resolution. Compile the affected code with '-parameters' instead or avoid its introspection: net.devh.boot.grpc.server.autoconfigure.GrpcHealthServiceAutoConfiguration
+2022-12-08T05:32:25.416-08:00  WARN 551632 --- [           main] ocalVariableTableParameterNameDiscoverer : Using deprecated '-debug' fallback for parameter name resolution. Compile the affected code with '-parameters' instead or avoid its introspection: net.devh.boot.grpc.server.autoconfigure.GrpcServerAutoConfiguration
+2022-12-08T05:32:25.425-08:00  WARN 551632 --- [           main] ocalVariableTableParameterNameDiscoverer : Using deprecated '-debug' fallback for parameter name resolution. Compile the affected code with '-parameters' instead or avoid its introspection: net.devh.boot.grpc.server.autoconfigure.GrpcServerFactoryAutoConfiguration
+2022-12-08T05:32:25.427-08:00  INFO 551632 --- [           main] g.s.a.GrpcServerFactoryAutoConfiguration : Detected grpc-netty: Creating NettyGrpcServerFactory
+2022-12-08T05:32:25.712-08:00  INFO 551632 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: Simple, bean: grpcServerService, class: com.example.demo.GrpcServerService
+2022-12-08T05:32:25.712-08:00  INFO 551632 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: grpc.health.v1.Health, bean: grpcHealthService, class: io.grpc.protobuf.services.HealthServiceImpl
+2022-12-08T05:32:25.712-08:00  INFO 551632 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: grpc.reflection.v1alpha.ServerReflection, bean: protoReflectionService, class: io.grpc.protobuf.services.ProtoReflectionService
+2022-12-08T05:32:25.820-08:00  INFO 551632 --- [           main] n.d.b.g.s.s.GrpcServerLifecycle          : gRPC Server started, listening on address: *, port: 9090
+2022-12-08T05:32:25.831-08:00  INFO 551632 --- [           main] com.example.demo.DemoApplication         : Started DemoApplication in 1.264 seconds (process running for 1.623)
+```
+
+The server starts by default on port 9090. Test with [gRPCurl](https://github.com/fullstorydev/grpcurl):
+
+```
+$ grpcurl -d '{"name":"Hi"}' -plaintext localhost:9090 Simple.SayHello
+{
+  "message": "Hello ==\u003e Hi"
+}
+```
+
+## Native Image
+
+The app compiles to a native image if the JVM is GraalVM:
+
+```
+$ ./mvnw -Pnative native:compile
+$ ./target/demo
+  .   ____          _            __ _ _
+ /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
+( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
+ \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
+  '  |____| .__|_| |_|_| |_\__, | / / / /
+ =========|_|==============|___/=/_/_/_/
+ :: Spring Boot ::                (v3.0.0)
+
+2022-12-08T05:36:54.365-08:00  INFO 554359 --- [           main] com.example.demo.DemoApplication         : Starting AOT-processed DemoApplication using Java 17.0.5 with PID 554359 (/home/dsyer/dev/scratch/demo/target/demo started by dsyer in /home/dsyer/dev/scratch/demo)
+2022-12-08T05:36:54.366-08:00  INFO 554359 --- [           main] com.example.demo.DemoApplication         : No active profile set, falling back to 1 default profile: "default"
+2022-12-08T05:36:54.377-08:00  INFO 554359 --- [           main] g.s.a.GrpcServerFactoryAutoConfiguration : Detected grpc-netty: Creating NettyGrpcServerFactory
+2022-12-08T05:36:54.392-08:00  INFO 554359 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: Simple, bean: grpcServerService, class: com.example.demo.GrpcServerService
+2022-12-08T05:36:54.392-08:00  INFO 554359 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: grpc.health.v1.Health, bean: grpcHealthService, class: io.grpc.protobuf.services.HealthServiceImpl
+2022-12-08T05:36:54.392-08:00  INFO 554359 --- [           main] n.d.b.g.s.s.AbstractGrpcServerFactory    : Registered gRPC service: grpc.reflection.v1alpha.ServerReflection, bean: protoReflectionService, class: io.grpc.protobuf.services.ProtoReflectionService
+2022-12-08T05:36:54.396-08:00  INFO 554359 --- [           main] n.d.b.g.s.s.GrpcServerLifecycle          : gRPC Server started, listening on address: *, port: 9090
+2022-12-08T05:36:54.396-08:00  INFO 554359 --- [           main] com.example.demo.DemoApplication         : Started DemoApplication in 0.046 seconds (process running for 0.052)
+```

samples/grpc-tomcat/pom.xml

@@ -0,0 +1,185 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
+	<modelVersion>4.0.0</modelVersion>
+	<parent>
+		<groupId>org.springframework.boot</groupId>
+		<artifactId>spring-boot-starter-parent</artifactId>
+		<version>3.3.3</version>
+		<relativePath /> <!-- lookup parent from repository -->
+	</parent>
+	<groupId>org.springframework.grpc</groupId>
+	<artifactId>grpc-tomcat-sample</artifactId>
+	<version>0.1.0-SNAPSHOT</version>
+	<name>Spring gRPC Server Sample</name>
+	<description>Demo project for Spring gRPC</description>
+	<url />
+	<licenses>
+		<license />
+	</licenses>
+	<developers>
+		<developer />
+	</developers>
+	<scm>
+		<connection />
+		<developerConnection />
+		<tag />
+		<url />
+	</scm>
+	<properties>
+		<java.version>17</java.version>
+		<spring-javaformat-maven-plugin.version>0.0.39</spring-javaformat-maven-plugin.version>
+		<protobuf-java.version>3.25.5</protobuf-java.version>
+		<grpc.version>1.63.2</grpc.version>
+	</properties>
+	<dependencyManagement>
+		<dependencies>
+			<dependency>
+				<groupId>org.springframework.grpc</groupId>
+				<artifactId>spring-grpc-dependencies</artifactId>
+				<version>0.1.0-SNAPSHOT</version>
+				<type>pom</type>
+				<scope>import</scope>
+			</dependency>
+		</dependencies>
+	</dependencyManagement>
+	<dependencies>
+		<dependency>
+			<groupId>org.springframework.grpc</groupId>
+			<artifactId>spring-grpc-spring-boot-starter</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-web</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>io.grpc</groupId>
+			<artifactId>grpc-services</artifactId>
+		</dependency>
+		<dependency>
+			<groupId>io.grpc</groupId>
+			<artifactId>grpc-servlet-jakarta</artifactId>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.springframework.grpc</groupId>
+			<artifactId>spring-grpc-test</artifactId>
+			<scope>test</scope>
+		</dependency>
+	</dependencies>
+
+	<build>
+		<extensions>
+			<extension>
+				<groupId>kr.motd.maven</groupId>
+				<artifactId>os-maven-plugin</artifactId>
+				<version>1.7.1</version>
+			</extension>
+		</extensions>
+		<plugins>
+			<plugin>
+				<groupId>org.graalvm.buildtools</groupId>
+				<artifactId>native-maven-plugin</artifactId>
+				<configuration>
+					<buildArgs>
+						<buildArg>--verbose</buildArg>
+					</buildArgs>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>org.springframework.boot</groupId>
+				<artifactId>spring-boot-maven-plugin</artifactId>
+			</plugin>
+			<plugin>
+				<groupId>org.apache.maven.plugins</groupId>
+				<artifactId>maven-deploy-plugin</artifactId>
+				<configuration>
+					<skip>true</skip>
+				</configuration>
+			</plugin>
+			<plugin>
+				<groupId>io.spring.javaformat</groupId>
+				<artifactId>spring-javaformat-maven-plugin</artifactId>
+				<version>${spring-javaformat-maven-plugin.version}</version>
+				<executions>
+					<execution>
+						<?m2e ignore?>
+						<phase>validate</phase>
+						<inherited>true</inherited>
+						<goals>
+							<goal>validate</goal>
+						</goals>
+					</execution>
+				</executions>
+			</plugin>
+			<plugin>
+				<groupId>org.xolstice.maven.plugins</groupId>
+				<artifactId>protobuf-maven-plugin</artifactId>
+				<version>0.6.1</version>
+				<executions>
+					<execution>
+						<goals>
+							<goal>compile</goal>
+							<goal>compile-custom</goal>
+						</goals>
+					</execution>
+				</executions>
+				<configuration>
+					<pluginParameter>
+						jakarta_omit
+					</pluginParameter>
+					<protocArtifact>
+						com.google.protobuf:protoc:${protobuf-java.version}:exe:${os.detected.classifier}</protocArtifact>
+					<pluginId>grpc-java</pluginId>
+					<pluginArtifact>
+						io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
+				</configuration>
+			</plugin>
+		</plugins>
+	</build>
+
+	<repositories>
+		<repository>
+			<id>spring-milestones</id>
+			<name>Spring Milestones</name>
+			<url>https://repo.spring.io/milestone</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</repository>
+		<repository>
+			<id>spring-snapshots</id>
+			<name>Spring Snapshots</name>
+			<url>https://repo.spring.io/snapshot</url>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</repository>
+	</repositories>
+	<pluginRepositories>
+		<pluginRepository>
+			<id>spring-milestones</id>
+			<name>Spring Milestones</name>
+			<url>https://repo.spring.io/milestone</url>
+			<snapshots>
+				<enabled>false</enabled>
+			</snapshots>
+		</pluginRepository>
+		<pluginRepository>
+			<id>spring-snapshots</id>
+			<name>Spring Snapshots</name>
+			<url>https://repo.spring.io/snapshot</url>
+			<releases>
+				<enabled>false</enabled>
+			</releases>
+		</pluginRepository>
+	</pluginRepositories>
+
+
+</project>

samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerApplication.java

@@ -0,0 +1,22 @@
+package org.springframework.grpc.sample;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.context.annotation.Bean;
+
+import io.grpc.BindableService;
+import io.grpc.protobuf.services.ProtoReflectionService;
+
+@SpringBootApplication
+public class GrpcServerApplication {
+
+	public static void main(String[] args) {
+		SpringApplication.run(GrpcServerApplication.class, args);
+	}
+
+	@Bean
+	public BindableService serverReflection() {
+		return ProtoReflectionService.newInstance();
+	}
+
+}

samples/grpc-tomcat/src/main/java/org/springframework/grpc/sample/GrpcServerService.java

@@ -0,0 +1,47 @@
+package org.springframework.grpc.sample;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.springframework.grpc.sample.proto.HelloReply;
+import org.springframework.grpc.sample.proto.HelloRequest;
+import org.springframework.grpc.sample.proto.SimpleGrpc;
+import org.springframework.scheduling.annotation.Async;
+import org.springframework.stereotype.Service;
+
+import io.grpc.stub.StreamObserver;
+
+@Service
+public class GrpcServerService extends SimpleGrpc.SimpleImplBase {
+
+	private static Log log = LogFactory.getLog(GrpcServerService.class);
+
+	@Override
+	public void sayHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
+		log.info("Hello " + req.getName());
+		HelloReply reply = HelloReply.newBuilder().setMessage("Hello ==> " + req.getName()).build();
+		responseObserver.onNext(reply);
+		responseObserver.onCompleted();
+	}
+
+	@Override
+	@Async
+	public void streamHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
+		log.info("Hello " + req.getName());
+		int count = 0;
+		while (count < 10) {
+			HelloReply reply = HelloReply.newBuilder().setMessage("Hello(" + count + ") ==> " + req.getName()).build();
+			responseObserver.onNext(reply);
+			count++;
+			try {
+				Thread.sleep(1000L);
+			}
+			catch (InterruptedException e) {
+				Thread.currentThread().interrupt();
+				responseObserver.onError(e);
+				return;
+			}
+		}
+		responseObserver.onCompleted();
+	}
+
+}

samples/grpc-tomcat/src/main/proto/hello.proto

@@ -0,0 +1,23 @@
+syntax = "proto3";
+
+option java_multiple_files = true;
+option java_package = "org.springframework.grpc.sample.proto";
+option java_outer_classname = "HelloWorldProto";
+
+// The greeting service definition.
+service Simple {
+    // Sends a greeting
+    rpc SayHello (HelloRequest) returns (HelloReply) {
+    }
+    rpc StreamHello(HelloRequest) returns (stream HelloReply) {}
+}
+
+// The request message containing the user's name.
+message HelloRequest {
+    string name = 1;
+}
+
+// The response message containing the greetings
+message HelloReply {
+    string message = 1;
+}

samples/grpc-tomcat/src/main/resources/META-INF/native-image/org.springframework.samples/grpc-tomcat-sample/native-image.properties

@@ -0,0 +1,2 @@
+# Ignored unless building in Nix (https://github.com/oracle/graal/issues/8639)
+Args = -ENIX_LDFLAGS -ENIX_CC_WRAPPER_TARGET_HOST_x86_64_unknown_linux_gnu

samples/grpc-tomcat/src/main/resources/application.properties

@@ -0,0 +1,3 @@
+spring.application.name=grpc-tomcat
+server.port=9090
+server.http2.enabled=true