import assertk.assertions.isFalse
import assertk.assertions.isSameAs
import assertk.assertions.isTrue
import java.io.IOException
import java.net.InetAddress
import java.net.InetSocketAddress
import java.net.Proxy
import java.net.ProxySelector
import java.net.SocketAddress
import java.net.URI
import java.net.UnknownHostException
import kotlin.test.assertFailsWith
import okhttp3.Address
import okhttp3.ConnectionListener
import okhttp3.FakeDns

    if (!newRouteSelector.hasNext()) throw IOException("exhausted all routes")
    val newRouteSelection = newRouteSelector.next()
    routeSelection = newRouteSelection

    if (isCanceled()) throw IOException("Canceled")

    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

pkg net, method (*Resolver) LookupSRV(context.Context, string, string, string) (string, []*SRV, error)
pkg net, method (*Resolver) LookupTXT(context.Context, string) ([]string, error)
pkg net, method (*UnixListener) SetUnlinkOnClose(bool)
pkg net, type Buffers [][]uint8
pkg net, type Dialer struct, Resolver *Resolver
pkg net, type Resolver struct
pkg net, type Resolver struct, PreferGo bool
pkg net/url, func PathEscape(string) string

): List<T> {
  val ia = a.iterator()
  val ib = b.iterator()

  return buildList {
    while (ia.hasNext() || ib.hasNext()) {
      if (ia.hasNext()) {
        add(ia.next())
      }
      if (ib.hasNext()) {
        add(ib.next())
      }
    }
  }
}

// TODO check read only options for creating lists
public fun <T> List<T>.readOnly() = this.toList()

import java.io.IOException
import java.net.ConnectException
import java.net.HttpURLConnection
import java.net.ProtocolException
import java.net.Proxy
import java.net.Socket
import java.net.UnknownServiceException
import java.security.cert.X509Certificate
import java.util.concurrent.TimeUnit
import javax.net.ssl.SSLPeerUnverifiedException
import javax.net.ssl.SSLSocket
import kotlin.concurrent.withLock

        }

        return false
      }

      override fun next(): String {
        if (!hasNext()) throw NoSuchElementException()
        val result = nextUrl!!
        nextUrl = null
        canRemove = true
        return result
      }

      override fun remove() {
        check(canRemove) { "remove() before next()" }
        delegate.remove()
      }
    }
  }

I'll show you some concrete examples in the next chapters.

---

Then the next concepts to consider are all about the program running your actual API (e.g. Uvicorn).

## Program and Process

```Python hl_lines="18-20"
{!../../../docs_src/sql_databases_peewee/sql_app/main.py!}
```

For the **next request**, as we will reset that context variable again in the `async` dependency `reset_db_state()` and then create a new connection in the `get_db()` dependency, that new request will have its own database state (connection, transactions, etc).

        ":tf_buffer_internal",
        ":tf_status",
        ":tf_status_helper",
        ":tf_tensor_internal",
        "//tensorflow/core/common_runtime/next_pluggable_device/c:tf_rendezvous_c_api",
        "//tensorflow/core/common_runtime/next_pluggable_device/c:tf_rendezvous_c_api_internal",
        "//tensorflow/core/platform:notification",
        "@com_google_absl//absl/status",
        "@com_google_absl//absl/strings",

          if (closed) return false

          while (delegate.hasNext()) {
            nextSnapshot = delegate.next()?.snapshot() ?: continue
            return true
          }
        }

        return false
      }

      override fun next(): Snapshot {
        if (!hasNext()) throw NoSuchElementException()
        removeSnapshot = nextSnapshot
        nextSnapshot = null