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.beam.sdk.util.construction;
  
  import static org.hamcrest.MatcherAssert.assertThat;
  import static org.hamcrest.Matchers.equalTo;
  
  import org.apache.beam.sdk.PipelineResult;
  import org.apache.beam.sdk.testing.TestPipeline;
  import org.apache.beam.vendor.grpc.v1p69p0.io.grpc.ConnectivityState;
  import org.apache.beam.vendor.grpc.v1p69p0.io.grpc.ManagedChannel;
  import org.apache.beam.vendor.grpc.v1p69p0.io.grpc.ManagedChannelBuilder;
  import org.junit.After;
  import org.junit.Before;
  import org.junit.BeforeClass;
  import org.junit.Rule;
  
  public class BaseExternalTest {
    @Rule public transient TestPipeline testPipeline = TestPipeline.create();
    protected static String expansionAddr;
  
    @BeforeClass
    public static void setUpClass() {
      expansionAddr =
          String.format("localhost:%s", Integer.valueOf(System.getProperty("expansionPort")));
    }
  
    @Before
    public void setUp() {
      waitForReady();
    }
  
    @After
    public void tearDown() {
      PipelineResult pipelineResult = testPipeline.run();
      pipelineResult.waitUntilFinish();
      assertThat(pipelineResult.getState(), equalTo(PipelineResult.State.DONE));
    }
  
    private void waitForReady() {
      try {
        ManagedChannel channel = ManagedChannelBuilder.forTarget(expansionAddr).build();
        ConnectivityState state = channel.getState(true);
        for (int retry = 0; retry < 30 && state != ConnectivityState.READY; retry++) {
          Thread.sleep(500);
          state = channel.getState(true);
        }
        channel.shutdownNow();
      } catch (InterruptedException e) {
        throw new RuntimeException("interrupted.");
      }
    }
  }
  