content: /*
   * 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.
   */
  package org.apache.camel.component.grpc;
  
  import java.util.List;
  
  import io.grpc.Server;
  import io.grpc.ServerBuilder;
  import io.grpc.stub.StreamObserver;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.test.AvailablePortFinder;
  import org.apache.camel.test.junit5.CamelTestSupport;
  import org.apache.camel.util.StopWatch;
  import org.junit.jupiter.api.AfterAll;
  import org.junit.jupiter.api.BeforeAll;
  import org.junit.jupiter.api.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertNotNull;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class GrpcProducerSyncTest extends CamelTestSupport {
  
      private static final Logger LOG = LoggerFactory.getLogger(GrpcProducerSyncTest.class);
  
      private static final int GRPC_TEST_PORT = AvailablePortFinder.getNextAvailable();
      private static final int GRPC_TEST_PING_ID = 1;
      private static final int GRPC_TEST_PONG_ID01 = 1;
      private static final int GRPC_TEST_PONG_ID02 = 2;
      private static final int MULTIPLE_RUN_TEST_COUNT = 100;
      private static final String GRPC_TEST_PING_VALUE = "PING";
      private static final String GRPC_TEST_PONG_VALUE = "PONG";
  
      private static Server grpcServer;
  
      @BeforeAll
      public static void startGrpcServer() throws Exception {
          grpcServer = ServerBuilder.forPort(GRPC_TEST_PORT).addService(new PingPongImpl()).build().start();
          LOG.info("gRPC server started on port {}", GRPC_TEST_PORT);
      }
  
      @AfterAll
      public static void stopGrpcServer() {
          if (grpcServer != null) {
              grpcServer.shutdown();
              LOG.info("gRPC server stopped");
          }
      }
  
      @Test
      public void testPingSyncSyncMethodInvocation() {
          LOG.info("gRPC PingSyncSync method test start");
          // Testing simple sync method invoke with host and port parameters
          PingRequest pingRequest
                  = PingRequest.newBuilder().setPingName(GRPC_TEST_PING_VALUE).setPingId(GRPC_TEST_PING_ID).build();
          Object pongResponse = template.requestBody("direct:grpc-sync-sync", pingRequest);
          assertNotNull(pongResponse);
          assertTrue(pongResponse instanceof PongResponse);
          assertEquals(GRPC_TEST_PING_ID, ((PongResponse) pongResponse).getPongId());
          assertEquals(GRPC_TEST_PING_VALUE + GRPC_TEST_PONG_VALUE, ((PongResponse) pongResponse).getPongName());
  
          // Testing simple sync method with name described in .proto file instead
          // of generated class
          pongResponse = template.requestBody("direct:grpc-sync-proto-method-name", pingRequest);
          assertNotNull(pongResponse);
          assertTrue(pongResponse instanceof PongResponse);
          assertEquals(GRPC_TEST_PING_ID, ((PongResponse) pongResponse).getPongId());
      }
  
      @Test
      public void testPingSyncSyncMultipleInvocation() {
          final StopWatch stopwatch = new StopWatch();
          // Multiple sync methods call for average performance estimation
          for (int id = 0; id < MULTIPLE_RUN_TEST_COUNT; id++) {
              PingRequest pingRequest = PingRequest.newBuilder().setPingName(GRPC_TEST_PING_VALUE + id).setPingId(id).build();
              Object pongResponse = template.requestBody("direct:grpc-sync-sync", pingRequest);
              assertEquals(((PongResponse) pongResponse).getPongId(), id);
          }
          LOG.info("Multiple sync invocation time {} milliseconds, average operations/sec {}",
                  stopwatch.taken(),
                  Math.round(1000 * MULTIPLE_RUN_TEST_COUNT / stopwatch.taken()));
      }
  
      @Test
      @SuppressWarnings("unchecked")
      public void testPingSyncAsyncMethodInvocation() {
          LOG.info("gRPC PingSyncAsync method test start");
          // Testing simple method with sync request and asyc response in synchronous invocation style
          PingRequest pingRequest
                  = PingRequest.newBuilder().setPingName(GRPC_TEST_PING_VALUE).setPingId(GRPC_TEST_PING_ID).build();
          Object pongResponse = template.requestBody("direct:grpc-sync-async", pingRequest);
          assertNotNull(pongResponse);
          assertTrue(pongResponse instanceof List<?>);
          assertEquals(GRPC_TEST_PONG_ID01, ((List<PongResponse>) pongResponse).get(0).getPongId());
          assertEquals(GRPC_TEST_PONG_ID02, ((List<PongResponse>) pongResponse).get(1).getPongId());
          assertEquals(GRPC_TEST_PING_VALUE + GRPC_TEST_PONG_VALUE, ((List<PongResponse>) pongResponse).get(0).getPongName());
      }
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              @Override
              public void configure() {
                  from("direct:grpc-sync-sync")
                          .to("grpc://localhost:" + GRPC_TEST_PORT
                              + "/org.apache.camel.component.grpc.PingPong?method=pingSyncSync&synchronous=true");
                  from("direct:grpc-sync-proto-method-name")
                          .to("grpc://localhost:" + GRPC_TEST_PORT
                              + "/org.apache.camel.component.grpc.PingPong?method=PingSyncSync&synchronous=true");
                  from("direct:grpc-sync-async")
                          .to("grpc://localhost:" + GRPC_TEST_PORT
                              + "/org.apache.camel.component.grpc.PingPong?method=pingSyncAsync&synchronous=true");
              }
          };
      }
  
      /**
       * Test gRPC PingPong server implementation
       */
      static class PingPongImpl extends PingPongGrpc.PingPongImplBase {
          @Override
          public void pingSyncSync(PingRequest request, StreamObserver<PongResponse> responseObserver) {
              LOG.info("gRPC server received data from PingPong service PingId={} PingName={}", request.getPingId(),
                      request.getPingName());
              PongResponse response = PongResponse.newBuilder().setPongName(request.getPingName() + GRPC_TEST_PONG_VALUE)
                      .setPongId(request.getPingId()).build();
              responseObserver.onNext(response);
              responseObserver.onCompleted();
          }
  
          @Override
          public void pingSyncAsync(PingRequest request, StreamObserver<PongResponse> responseObserver) {
              LOG.info("gRPC server received data from PingAsyncResponse service PingId={} PingName={}", request.getPingId(),
                      request.getPingName());
              PongResponse response01 = PongResponse.newBuilder().setPongName(request.getPingName() + GRPC_TEST_PONG_VALUE)
                      .setPongId(GRPC_TEST_PONG_ID01).build();
              PongResponse response02 = PongResponse.newBuilder().setPongName(request.getPingName() + GRPC_TEST_PONG_VALUE)
                      .setPongId(GRPC_TEST_PONG_ID02).build();
              responseObserver.onNext(response01);
              responseObserver.onNext(response02);
              responseObserver.onCompleted();
          }
      }
  }
  