}
        if (componentName == null) {
            throw new IllegalStateException(
                    "componentName is not set. Please specify a valid component name for the pooled object factory.");
        }
        if (logger.isDebugEnabled()) {
            logger.debug("Creating new pooled object for component: {}", componentName);
        }

    /**
     * Process a model object, potentially returning a pooled or optimized version.
     *
     * <p>This method is called during model building for various model objects.
     * Implementations can:</p>
     * <ul>
     *   <li>Return the same object if no processing is desired</li>
     *   <li>Return a pooled equivalent object to reduce memory usage</li>

    return planConnectToRoute(newRouteSelection.next(), newRouteSelection.routes)
  }

  /**
   * Returns a plan to reuse a pooled connection, or null if the pool doesn't have a connection for
   * this address.
   *
   * If [planToReplace] is non-null, this will swap it for a pooled connection if that pooled
   * connection uses HTTP/2. That results in fewer sockets overall and thus fewer TCP slow starts.
   */

    // Second call attempts the pooled connection, and it fails. Then it retries a new route which
    // succeeds.
    val response2 = client.newCall(request).execute()
    assertThat(response2.body.string()).isEqualTo("abc")
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(1) // Pooled connection.
    assertThat(server.takeRequest().exchangeIndex).isEqualTo(0) // New connection.

    different cipher suite than before! OkHttp's defaults cipher suites are selected for good
    security and performance.

 *  New: `ConnectionListener` publishes events for connects, disconnects, and use of pooled
    connections.

 *  Fix: Immediately update the connection's flow control window instead of waiting for the
    receiving stream to process it.

        when {
          client.fastFallback -> FastFallbackExchangeFinder(routePlanner, client.taskRunner)
          else -> SequentialExchangeFinder(routePlanner)
        }
    }
  }

  /** Finds a new or pooled connection to carry a forthcoming request and response. */
  internal fun initExchange(chain: RealInterceptorChain): Exchange {
    withLock {
      check(expectMoreExchanges) { "released" }

   *
   * This can be invoked more than 1 time for a single [Call]. For example, if the response to the
   * [Call.request] is a redirect to a different host.
   *
   * If the [Call] is able to reuse an existing pooled connection, this method will not be invoked.
   * See [ConnectionPool].
   */
  open fun dnsStart(
    call: Call,
    domainName: String,
  ) {
  }

  /**

import org.codelibs.fess.crawler.pool.CrawlerPooledObjectFactory.OnDestroyListener;
import org.dbflute.utflute.core.PlainTestCase;

/**
 * Test class for CrawlerPooledObjectFactory.
 * Tests the pooled object factory functionality including object creation,
 * wrapping, destruction, and listener mechanisms.
 */
public class CrawlerPooledObjectFactoryTest extends PlainTestCase {

    val requestBodyDelay = 250L
    val responseHeadersStartDelay = 250L
    val responseBodyStartDelay = 250L
    val responseBodyEndDelay = 250L

    // Warm up the client so the timing part of the test gets a pooled connection.
    server.enqueue(MockResponse())
    val warmUpCall =
      client.newCallWithListener(
        Request
          .Builder()
          .url(server.url("/"))
          .build(),

    assertThat(server.takeRequest().exchangeIndex).isEqualTo(2)
  }

  /**
   * Each OkHttpClient used to get its own instance of NullProxySelector, and because these weren't
   * equal their connections weren't pooled. That's a nasty performance bug!
   *
   * https://github.com/square/okhttp/issues/5519
   */
  @Test
  fun connectionPoolingWithFreshClientSamePool() {
    server.enqueue(MockResponse(body = "abc"))