code for gRPC

2017-07-29 00:29:28 +05:30
parent 9b143b820c
commit 38989db6c1
5 changed files with 165 additions and 0 deletions
@@ -0,0 +1,28 @@
+package org.baeldung.grpc.client;
+
+import org.baeldung.grpc.HelloRequest;
+import org.baeldung.grpc.HelloResponse;
+import org.baeldung.grpc.HelloServiceGrpc;
+
+import io.grpc.ManagedChannel;
+import io.grpc.ManagedChannelBuilder;
+
+public class GrpcClient {
+    public static void main(String[] args) throws InterruptedException {
+        ManagedChannel channel = ManagedChannelBuilder.forAddress("localhost", 8080)
+            .usePlaintext(true)
+            .build();
+
+        HelloServiceGrpc.HelloServiceBlockingStub stub 
+          = HelloServiceGrpc.newBlockingStub(channel);
+
+        HelloResponse helloResponse = stub.hello(HelloRequest.newBuilder()
+            .setFirstName("Baeldung")
+            .setLastName("gRPC")
+            .build());
+
+        System.out.println("Response received from server:\n" + helloResponse);
+
+        channel.shutdown();
+    }
+}
@@ -0,0 +1,19 @@
+package org.baeldung.grpc.server;
+
+import java.io.IOException;
+
+import io.grpc.Server;
+import io.grpc.ServerBuilder;
+
+public class GrpcServer
+{
+    public static void main(String[] args) throws IOException, InterruptedException {
+        Server server = ServerBuilder.forPort(8080)
+            .addService(new HelloServiceImpl()).build();
+
+        System.out.println("Starting server...");
+        server.start();
+        System.out.println("Server started!");
+        server.awaitTermination();
+    }
+}
@@ -0,0 +1,29 @@
+package org.baeldung.grpc.server;
+
+import org.baeldung.grpc.HelloRequest;
+import org.baeldung.grpc.HelloResponse;
+import org.baeldung.grpc.HelloServiceGrpc.HelloServiceImplBase;
+
+import io.grpc.stub.StreamObserver;
+
+public class HelloServiceImpl extends HelloServiceImplBase {
+
+    @Override
+    public void hello(
+      HelloRequest request, StreamObserver<HelloResponse> responseObserver) {
+        System.out.println("Request received from client:\n" + request);
+
+        String greeting = new StringBuilder().append("Hello, ")
+            .append(request.getFirstName())
+            .append(" ")
+            .append(request.getLastName())
+            .toString();
+
+        HelloResponse response = HelloResponse.newBuilder()
+            .setGreeting(greeting)
+            .build();
+
+        responseObserver.onNext(response);
+        responseObserver.onCompleted();
+    }
+}
@@ -0,0 +1,16 @@
+syntax = "proto3";
+option java_multiple_files = true;
+package org.baeldung.grpc;
+
+message HelloRequest {
+    string firstName = 1;
+    string lastName = 2;
+}
+
+message HelloResponse {
+    string greeting = 1;
+}
+
+service HelloService {
+    rpc hello(HelloRequest) returns (HelloResponse);
+}