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.concurrent.CountDownLatch;
  import java.util.concurrent.TimeUnit;
  
  import io.grpc.ManagedChannel;
  import io.grpc.ManagedChannelBuilder;
  import io.grpc.StatusRuntimeException;
  import io.grpc.stub.StreamObserver;
  import org.apache.camel.CamelException;
  import org.apache.camel.builder.RouteBuilder;
  import org.apache.camel.test.AvailablePortFinder;
  import org.apache.camel.test.junit5.CamelTestSupport;
  import org.junit.jupiter.api.AfterEach;
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
  import static org.junit.jupiter.api.Assertions.assertEquals;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  public class GrpcConsumerExceptionTest extends CamelTestSupport {
  
      private static final Logger LOG = LoggerFactory.getLogger(GrpcConsumerExceptionTest.class);
  
      private static final int GRPC_SYNC_REQUEST_TEST_PORT = AvailablePortFinder.getNextAvailable();
      private static final int GRPC_TEST_PING_ID = 1;
      private static final String GRPC_TEST_PING_VALUE = "PING";
  
      private ManagedChannel syncRequestChannel;
      private PingPongGrpc.PingPongBlockingStub blockingStub;
      private PingPongGrpc.PingPongStub nonBlockingStub;
  
      @BeforeEach
      public void startGrpcChannels() {
          syncRequestChannel = ManagedChannelBuilder.forAddress("localhost", GRPC_SYNC_REQUEST_TEST_PORT).usePlaintext().build();
          blockingStub = PingPongGrpc.newBlockingStub(syncRequestChannel);
          nonBlockingStub = PingPongGrpc.newStub(syncRequestChannel);
      }
  
      @AfterEach
      public void stopGrpcChannels() {
          if (syncRequestChannel != null) {
              syncRequestChannel.shutdown().shutdownNow();
          }
      }
  
      @Test
      public void testExceptionExpected() {
          LOG.info("gRPC expected exception test start");
          PingRequest pingRequest
                  = PingRequest.newBuilder().setPingName(GRPC_TEST_PING_VALUE).setPingId(GRPC_TEST_PING_ID).build();
          assertThrows(StatusRuntimeException.class, () -> blockingStub.pingSyncSync(pingRequest));
      }
  
      @Test
      public void testExchangeExceptionHandling() {
          LOG.info("gRPC exchange exception handling test start");
          assertDoesNotThrow(this::runExchangeExceptionHandlingTest);
      }
  
      private void runExchangeExceptionHandlingTest() throws InterruptedException {
          final CountDownLatch latch = new CountDownLatch(1);
          PingRequest pingRequest
                  = PingRequest.newBuilder().setPingName(GRPC_TEST_PING_VALUE).setPingId(GRPC_TEST_PING_ID).build();
          PongResponseStreamObserver responseObserver = new PongResponseStreamObserver(latch);
  
          nonBlockingStub.pingSyncSync(pingRequest, responseObserver);
          assertTrue(latch.await(5, TimeUnit.SECONDS));
      }
  
      @Override
      protected RouteBuilder createRouteBuilder() {
          return new RouteBuilder() {
              @Override
              public void configure() {
                  from("grpc://localhost:" + GRPC_SYNC_REQUEST_TEST_PORT
                       + "/org.apache.camel.component.grpc.PingPong?synchronous=true")
                          .throwException(CamelException.class, "GRPC Camel exception message");
  
              }
          };
      }
  
      static class PongResponseStreamObserver implements StreamObserver<PongResponse> {
          private PongResponse pongResponse;
          private final CountDownLatch latch;
  
          public PongResponseStreamObserver(CountDownLatch latch) {
              this.latch = latch;
          }
  
          public PongResponse getPongResponse() {
              return pongResponse;
          }
  
          @Override
          public void onNext(PongResponse value) {
              pongResponse = value;
          }
  
          @Override
          public void onError(Throwable t) {
              assertEquals("INTERNAL: GRPC Camel exception message", t.getMessage());
              LOG.info("Exception", t);
              latch.countDown();
          }
  
          @Override
          public void onCompleted() {
              latch.countDown();
          }
      }
  }
  