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- public class Client {
- private final ManagedChannel channel;
- private final GreeterBlockingStub blockingStub;
- private final GreeterStub asyncStub;
- public Client(String host, String port){
- channel = ManagedChannelBuilder.forAddress(host, port).usePlaintext().build(); //remove .usePlainText for secure connections
- blockingStub = GreeterGrpc.newBlockingStub(channel); // use it to make blocking calls
- asyncStub = GreeterGrpc.newStub(channel); // or use this to make async calls
- }
- public void blockingGreet(String name) {
- logger.info("Will try to greet " + name + " ...");
- HelloRequest request = HelloRequest.newBuilder().setName(name).build();
- HelloReply response;
- try {
- response = blockingStub.sayHello(request);
- } catch (StatusRuntimeException e) {
- logger.log(Level.WARNING, "RPC failed: {0}", e.getStatus());
- return;
- }
- logger.info("Greeting: " + response.getMessage());
- }
- public void asyncGreet(String name) {
- StreamObserver<HelloReply> responseObserver = new StreamObserver<HelloReply>() {
- @Override
- public void onNext(HelloReply response) {
- logger.info("Greeting: " + response.getMessage());
- }
- @Override
- public void onError(Throwable t) {
- Status status = Status.fromThrowable(t);
- logger.log(Level.WARNING, "RPC Failed: {0}", status);
- }
- @Override
- public void onCompleted() {
- info("Finished Greeting");
- }
- };
- logger.info("Will try to greet " + name + " ...");
- HelloRequest request = HelloRequest.newBuilder().setName(name).build();
- asyncStub.sayHello(request, responseObserver);
- }
- }
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