@Override
      public Thread newThread(Runnable r) {
        return new Thread(r);
      }
    }

    @Keep
    public static final class DummyExecutor implements Executor, Serializable {
      @Override
      public void execute(Runnable command) {}
    }
  }

  private static final class NullByteSink extends ByteSink implements Serializable {
    private static final NullByteSink INSTANCE = new NullByteSink();

    }

    eventListener.canceled(this)
  }

  override fun isCanceled(): Boolean = canceled

  override fun execute(): Response {
    check(executed.compareAndSet(false, true)) { "Already Executed" }

    timeout.enter()
    callStart()
    try {
      client.dispatcher.executed(this)
      return getResponseWithInterceptorChain()
    } finally {
      client.dispatcher.finished(this)
    }
  }

    val boom = RuntimeException("boom!")
    addInterceptor(network) { chain: Interceptor.Chain? -> throw boom }
    val executor = ExceptionCatchingExecutor()
    client =
      client
        .newBuilder()
        .dispatcher(Dispatcher(executor))
        .build()
    val request =
      Request
        .Builder()
        .url(server.url("/"))
        .build()

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Futures#transformAsync(ListenableFuture, AsyncFunction, Executor)}.
 *
 * @author Nishant Thakkar
 */
@NullUnmarked
public class FuturesTransformAsyncTest extends AbstractChainedListenableFutureTest<String> {
  protected static final int SLOW_OUTPUT_VALID_INPUT_DATA = 2;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.ExecutionException;
import org.jspecify.annotations.NullUnmarked;

/**
 * Unit tests for {@link Futures#transformAsync(ListenableFuture, AsyncFunction, Executor)}.
 *
 * @author Nishant Thakkar
 */
@NullUnmarked
public class FuturesTransformAsyncTest extends AbstractChainedListenableFutureTest<String> {
  protected static final int SLOW_OUTPUT_VALID_INPUT_DATA = 2;

    assertTrue(ArbitraryInstances.get(ConcurrentMap.class).isEmpty());
    assertTrue(ArbitraryInstances.get(ConcurrentNavigableMap.class).isEmpty());
    ArbitraryInstances.get(Executor.class).execute(ArbitraryInstances.get(Runnable.class));
    assertThat(ArbitraryInstances.get(ThreadFactory.class)).isNotNull();
    assertFreshInstanceReturned(
        BlockingQueue.class,
        BlockingDeque.class,

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      private val executor = Executors.newScheduledThreadPool(1)
      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()

    assertTrue(ArbitraryInstances.get(ConcurrentMap.class).isEmpty());
    assertTrue(ArbitraryInstances.get(ConcurrentNavigableMap.class).isEmpty());
    ArbitraryInstances.get(Executor.class).execute(ArbitraryInstances.get(Runnable.class));
    assertThat(ArbitraryInstances.get(ThreadFactory.class)).isNotNull();
    assertFreshInstanceReturned(
        BlockingQueue.class,
        BlockingDeque.class,

Sometimes there's an action required like calling the application layer or responding to a ping, and the thread discovering the action is not the thread that should do the work. We enqueue a runnable on this executor and it gets handled by one of the executor's threads.

### Locks

We have 3 different things that we synchronize on.

#### Http2Connection

              <revisionOnScmFailure>NON_CANONICAL</revisionOnScmFailure>
            </configuration>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-failsafe-plugin</artifactId>
        <executions>
          <execution>
            <!--  <phase></phase> -->
            <goals>
              <goal>integration-test</goal>