client: OkHttpClient,
) {
  try {
    for (url in urls) {
      sendRequest(client, url)
    }
  } finally {
    client.dispatcher.executorService.shutdownNow()
    client.connectionPool.evictAll()
  }
}

private fun buildClient(vararg specs: ConnectionSpec): OkHttpClient {
  return OkHttpClient.Builder()
    .connectionSpecs(listOf(*specs))
    .build()
}

private fun sendRequest(

      var line: String?
      while (response.body.source().readUtf8Line().also { line = it } != null) {
        println(line)
      }
    } finally {
      response.body.close()
    }
    client.connectionPool.evictAll()
  }

which is designed to persist between app restarts.

```kotlin
cache.delete()
```
 
## Pruning the Cache

Pruning the entire Cache to clear space temporarily can be done using evictAll.

```kotlin
cache.evictAll()
```

Removing individual items can be done using the urls iterator.
This would be typical after a user initiates a force refresh by a pull to refresh type action.

```java

  internal val connectionListener: ConnectionListener
    get() = delegate.connectionListener

  /** Close and remove all idle connections in the pool. */
  fun evictAll() {
    delegate.evictAll()
  }

  /**
   * Sets a policy that applies to [address].
   * Overwrites any existing policy for that address.
   */
  @ExperimentalOkHttpApi
  fun setPolicy(
    address: Address,

        client = bootstrapClient,
        http2Only = true,
        workingOnly = true,
        getOnly = true,
      )
    runBatch(dnsProviders, names)
  } finally {
    bootstrapClient.connectionPool.evictAll()
    bootstrapClient.dispatcher.executorService.shutdownNow()
    bootstrapClient.cache?.close()
  }

        .build();
  };

  private final OkHttpClient client;

  public RewriteResponseCacheControl(File cacheDirectory) throws Exception {
    Cache cache = new Cache(cacheDirectory, 1024 * 1024);
    cache.evictAll();

    client = new OkHttpClient.Builder()
        .cache(cache)
        .build();
  }

  public void run() throws Exception {
    for (int i = 0; i < 5; i++) {
      System.out.println("    Request: " + i);

    val request = Request(server.url("/"))

    client.newCall(request).execute().use { response ->
      assertEquals(200, response.code)
    }

    client.connectionPool.evictAll()
    assertEquals(0, client.connectionPool.connectionCount())

    // Force reuse. This appears flaky (30% of the time) even though sessions are reused.

      builder.eventListenerFactory(LoggingEventListener.Factory(logger))
    }
    return builder.build()
  }

  fun close() {
    val okHttpClient = client as OkHttpClient
    okHttpClient.connectionPool.evictAll() // Close any persistent connections.
    okHttpClient.dispatcher.executorService.shutdownNow()
  }

  companion object {
    internal const val NAME = "okcurl"
    internal const val DEFAULT_TIMEOUT = -1

    client.newCall(request).execute().use {
      assertThat(it.protocol).isEqualTo(Protocol.HTTP_2)
      assertThat(it.handshake!!.tlsVersion).isEqualTo(TlsVersion.TLS_1_3)
    }

    client.connectionPool.evictAll()
    assertEquals(0, client.connectionPool.connectionCount())

    client.newCall(request).execute().use {
      assertThat(it.protocol).isEqualTo(Protocol.HTTP_2)