OkHttp 2 uses the new `Request` class for this.

 *  **Dispatcher** is a new class that manages the queue of asynchronous calls. It
    implements limits on total in-flight calls and in-flight calls per host.

#### Implementation changes

 * Support Android `TrafficStats` socket tagging.
 * Drop authentication headers on redirect.
 * Added support for compressed data frames.

| `minio_s3_requests_incoming_total`            | Volatile number of total incoming S3 requests.           |
| `minio_s3_requests_inflight_total`            | Total number of S3 requests currently in flight.         |
| `minio_s3_requests_rejected_auth_total`       | Total number S3 requests rejected for auth failure.      |
| `minio_s3_requests_rejected_header_total`     | Total number S3 requests rejected for invalid header.    |

  override fun request(): Request = originalRequest

  /**
   * Immediately closes the socket connection if it's currently held. Use this to interrupt an
   * in-flight request from any thread. It's the caller's responsibility to close the request body
   * and response body streams; otherwise resources may be leaked.
   *

    streamId: Int,
  ) {
    val w1 = source.readInt()
    val exclusive = w1 and 0x80000000.toInt() != 0
    val streamDependency = w1 and 0x7fffffff
    val weight = (source.readByte() and 0xff) + 1
    handler.priority(streamId, streamDependency, weight, exclusive)
  }

  @Throws(IOException::class)
  private fun readRstStream(
    handler: Handler,
    length: Int,
    flags: Int,
    streamId: Int,

   */
  @Throws(IOException::class)
  fun delete() {
    close()
    fileSystem.deleteContents(directory)
  }

  /**
   * Deletes all stored values from the cache. In-flight edits will complete normally but their
   * values will not be stored.
   */
  @Synchronized
  @Throws(IOException::class)
  fun evictAll() {
    initialize()
    // Copying for concurrent iteration.

   * directory including files that weren't created by the cache.
   */
  @Throws(IOException::class)
  fun delete() {
    cache.delete()
  }

  /**
   * Deletes all values stored in the cache. In-flight writes to the cache will complete normally,
   * but the corresponding responses will not be stored.
   */
  @Throws(IOException::class)
  fun evictAll() {
    cache.evictAll()
  }

  /**

    // Cause the rebuild action to fail.
    filesystem.setFaultyRename(cacheDir / DiskLruCache.JOURNAL_FILE_BACKUP, true)
    taskFaker.runNextTask()

    // In-flight editors can commit and have their values retained.
    commitEditor.setString(0, "c")
    commitEditor.setString(1, "c")
    commitEditor.commit()
    assertValue("c", "c", "c")
    abortEditor.abort()

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dth:2em;line-height:inherit}.fa-border{border:.08em solid #eee;border-radius:.1em;padding:.2em .25em .15em}.fa-pull-left{float:left}.fa-pull-right{float:right}.fa.fa-pull-left,.fab.fa-pull-left,.fal.fa-pull-left,.far.fa-pull-left,.fas.fa-pull-left{margin-right:.3em}.fa.fa-pull-right,.fab.fa-pull-right,.fal.fa-pull-right,.far.fa-pull-right,.fas.fa-pull-right{margin-left:.3em}.fa-spin{-webkit-animation:fa-spin 2s linear infinite;animation:fa-spin 2s linear infinite}.fa-pulse{-webkit-animation:fa-spin...

	return MetricDescription{
		Namespace: s3MetricNamespace,
		Subsystem: requestsSubsystem,
		Name:      inflightTotal,
		Help:      "Total number of S3 requests currently in flight",
		Type:      gaugeMetric,
	}
}

func getS3RequestsInQueueMD() MetricDescription {
	return MetricDescription{
		Namespace: s3MetricNamespace,
		Subsystem: requestsSubsystem,