Created project for gRPC task.
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magoeke
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0f4364b2f2
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4 changed files with 297 additions and 0 deletions
143
task05/pom.xml
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143
task05/pom.xml
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>de.hftstuttgart.vs</groupId>
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<artifactId>task05</artifactId>
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<packaging>jar</packaging>
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<!-- Feel free to delete the comment at the end of these lines. It is just
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for safely updating the version in our release process. -->
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<version>0.0.1-SNAPSHOT</version>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<grpc.version>1.54.1</grpc.version><!-- CURRENT_GRPC_VERSION -->
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<protobuf.version>3.22.3</protobuf.version>
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<protoc.version>3.22.3</protoc.version>
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<!-- required for JDK 8 -->
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<maven.compiler.source>1.8</maven.compiler.source>
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<maven.compiler.target>1.8</maven.compiler.target>
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</properties>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-bom</artifactId>
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<version>${grpc.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-netty-shaded</artifactId>
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<scope>runtime</scope>
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</dependency>
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<dependency>
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<groupId>com.google.protobuf</groupId>
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<artifactId>protobuf-java-util</artifactId>
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<version>${protobuf.version}</version>
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</dependency>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-protobuf</artifactId>
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</dependency>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-services</artifactId>
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</dependency>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-stub</artifactId>
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</dependency>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-api</artifactId>
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</dependency>
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<dependency>
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<groupId>com.google.code.gson</groupId>
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<artifactId>gson</artifactId>
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<version>2.9.0</version> <!-- prevent downgrade via protobuf-java-util -->
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</dependency>
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<dependency>
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<groupId>com.google.guava</groupId>
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<artifactId>guava</artifactId>
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<version>31.1-jre</version> <!-- prevent downgrade of version in protobuf-java-util -->
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</dependency>
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<dependency>
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<groupId>org.apache.tomcat</groupId>
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<artifactId>annotations-api</artifactId>
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<version>6.0.53</version>
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<scope>provided</scope> <!-- not needed at runtime -->
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</dependency>
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<dependency>
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<groupId>io.grpc</groupId>
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<artifactId>grpc-testing</artifactId>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.2</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.mockito</groupId>
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<artifactId>mockito-core</artifactId>
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<version>3.4.0</version>
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<scope>test</scope>
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</dependency>
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</dependencies>
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<build>
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<extensions>
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<extension>
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<groupId>kr.motd.maven</groupId>
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<artifactId>os-maven-plugin</artifactId>
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<version>1.7.1</version>
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</extension>
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</extensions>
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<plugins>
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<plugin>
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<groupId>org.xolstice.maven.plugins</groupId>
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<artifactId>protobuf-maven-plugin</artifactId>
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<version>0.6.1</version>
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<configuration>
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<protocArtifact>com.google.protobuf:protoc:${protoc.version}:exe:${os.detected.classifier}</protocArtifact>
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<pluginId>grpc-java</pluginId>
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<pluginArtifact>io.grpc:protoc-gen-grpc-java:${grpc.version}:exe:${os.detected.classifier}</pluginArtifact>
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</configuration>
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<executions>
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<execution>
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<goals>
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<goal>compile</goal>
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<goal>compile-custom</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-enforcer-plugin</artifactId>
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<version>1.4.1</version>
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<executions>
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<execution>
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<id>enforce</id>
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<goals>
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<goal>enforce</goal>
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</goals>
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<configuration>
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<rules>
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<requireUpperBoundDeps/>
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</rules>
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</configuration>
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</execution>
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</executions>
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</plugin>
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</plugins>
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</build>
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</project>
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55
task05/src/main/java/de/hftstuttgart/vs/HelloClient.java
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55
task05/src/main/java/de/hftstuttgart/vs/HelloClient.java
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package de.hftstuttgart.vs;
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import io.grpc.Channel;
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import io.grpc.Grpc;
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import io.grpc.InsecureChannelCredentials;
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import io.grpc.ManagedChannel;
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import io.grpc.StatusRuntimeException;
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import java.util.concurrent.TimeUnit;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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public class HelloClient {
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private static final Logger logger = Logger.getLogger(HelloClient.class.getName());
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private final GreeterGrpc.GreeterBlockingStub blockingStub;
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public HelloClient(Channel channel) {
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blockingStub = GreeterGrpc.newBlockingStub(channel);
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}
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public void greet(String name) {
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logger.info("Will try to greet " + name + " ...");
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HelloRequest request = HelloRequest.newBuilder().setName(name).build();
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HelloReply response;
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try {
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response = blockingStub
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.sayHello(request);
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} catch (StatusRuntimeException e) {
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logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
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return;
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}
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logger.info("Greeting: " + response.getMessage());
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}
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public static void main(String[] args) throws Exception {
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String user = "world";
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String target = "localhost:50051";
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ManagedChannel channel = Grpc
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.newChannelBuilder(target, InsecureChannelCredentials.create())
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.build();
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try {
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HelloClient client = new HelloClient(channel);
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client.greet(user);
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} finally {
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channel
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.shutdownNow()
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.awaitTermination(5, TimeUnit.SECONDS);
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}
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}
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}
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task05/src/main/java/de/hftstuttgart/vs/HelloServer.java
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package de.hftstuttgart.vs;
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import io.grpc.Grpc;
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import io.grpc.InsecureServerCredentials;
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import io.grpc.Server;
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import io.grpc.stub.StreamObserver;
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import java.io.IOException;
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import java.util.logging.Logger;
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import java.util.concurrent.TimeUnit;
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public class HelloServer {
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private static final Logger logger = Logger.getLogger(HelloServer.class.getName());
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private Server server;
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private void start() throws IOException {
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/* The port on which the server should run */
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int port = 50051;
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server = Grpc.newServerBuilderForPort(port, InsecureServerCredentials.create())
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.addService(new GreeterImpl())
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.build()
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.start();
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logger.info("Server started, listening on " + port);
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Runtime.getRuntime().addShutdownHook(new Thread() {
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@Override
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public void run() {
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// Use stderr here since the logger may have been reset by its JVM shutdown hook.
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System.err.println("*** shutting down gRPC server since JVM is shutting down");
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try {
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HelloServer.this.stop();
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} catch (InterruptedException e) {
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e.printStackTrace(System.err);
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}
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System.err.println("*** server shut down");
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}
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});
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}
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private void stop() throws InterruptedException {
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if (server != null) {
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server.shutdown().awaitTermination(30, TimeUnit.SECONDS);
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}
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}
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/**
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* Await termination on the main thread since the grpc library uses daemon threads.
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*/
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private void blockUntilShutdown() throws InterruptedException {
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if (server != null) {
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server.awaitTermination();
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}
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}
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/**
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* Main launches the server from the command line.
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*/
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public static void main(String[] args) throws IOException, InterruptedException {
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final HelloServer server = new HelloServer();
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server.start();
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server.blockUntilShutdown();
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}
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static class GreeterImpl extends GreeterGrpc.GreeterImplBase {
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@Override
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public void sayHello(HelloRequest req, StreamObserver<HelloReply> responseObserver) {
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HelloReply reply = HelloReply.newBuilder().setMessage("Hello " + req.getName()).build();
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responseObserver.onNext(reply);
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responseObserver.onCompleted();
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}
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}
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}
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24
task05/src/main/proto/helloworld.proto
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syntax = "proto3";
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option java_multiple_files = true;
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option java_package = "de.hftstuttgart.vs";
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option java_outer_classname = "HelloWorldProto";
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option objc_class_prefix = "HLW";
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package helloworld;
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// The greeting service definition.
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service Greeter {
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// Sends a greeting
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rpc SayHello (HelloRequest) returns (HelloReply) {}
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}
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// The request message containing the user's name.
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message HelloRequest {
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string name = 1;
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}
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// The response message containing the greetings
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message HelloReply {
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string message = 1;
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}
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