fun evictAll() {
    delegate.evictAll()
  }

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

  /**
   * A policy for how the pool should treat a specific address.
   */
  class AddressPolicy(

```

#### Dispatcher

By default MockWebServer uses a queue to specify a series of responses. Use a
Dispatcher (`import okhttp3.mockwebserver.Dispatcher`) to handle requests using another policy. One natural policy is to
dispatch on the request path.
You can, for example, filter the request instead of using `server.enqueue()`.

```java
final Dispatcher dispatcher = new Dispatcher() {

    @Override

 * Applications may configure OkHttp with an authenticator for origin servers, or proxy servers,
 * or both.
 *
 * ## Authentication Retries
 *
 * If your authentication may be flaky and requires retries you should apply some policy
 * to limit the retries by the class of errors and number of attempts.  To get the number of
 * attempts to the current point use this function.
 *
 * ```java
 * private int responseCount(Response response) {

 * limitations under the License.
 */
package okhttp3

/**
 * Provides **policy** and **persistence** for HTTP cookies.
 *
 * As policy, implementations of this interface are responsible for selecting which cookies to
 * accept and which to reject. A reasonable policy is to reject all cookies, though that may
 * interfere with session-based authentication schemes that require cookies.
 *

    assertThat(pool.connectionCount()).isEqualTo(1)
  }

  private fun setPolicy(
    pool: RealConnectionPool,
    address: Address,
    policy: ConnectionPool.AddressPolicy,
  ) {
    pool.setPolicy(address, policy)
    taskFaker.runTasks()
  }

  private fun evictAllConnections(pool: RealConnectionPool) {
    pool.evictAll()
    assertThat(pool.connectionCount()).isEqualTo(0)

    return references.size
  }

  /**
   * Adds or replaces the policy for [address].
   * This will trigger a background task to start creating connections as needed.
   */
  fun setPolicy(
    address: Address,
    policy: ConnectionPool.AddressPolicy,
  ) {
    val state = AddressState(address, taskRunner.newQueue(), policy)
    val newConnectionsNeeded: Int

    while (true) {

        writeHttpResponse(socket, sink, response)
      }

      var hasBody = false
      val policy = dispatcher.peek()
      val requestBodySink =
        requestBody.withThrottlingAndSocketPolicy(
          policy = policy,
          disconnectHalfway = policy.socketPolicy == DisconnectDuringRequestBody,
          expectedByteCount = contentLength,
          socket = socket,
        ).buffer()

    assertContent("This connection won't pool properly", response1)
    assertThat(server.takeRequest().sequenceNumber).isEqualTo(0)

    // Give the server time to enact the socket policy if it's one that could happen after the
    // client has received the response.
    Thread.sleep(500)
    val response2 = getResponse(newRequest("/b"))

In OkHttp we expose a blocking API over a framed protocol. This document explains the code and policy that makes that work.

### Threads

#### Application's calling thread

managing how many simultaneous requests you make. Too many simultaneous connections wastes resources; too few harms latency.

For asynchronous calls, [`Dispatcher`](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-dispatcher/) implements policy for maximum simultaneous requests. You can set maximums per-webserver (default is 5), and overall (default is 64)....