es.SemaphoreValve</strong>.</p>
      </td></tr><tr><td><code class="attributeName">concurrency</code></td><td>
        <p>Concurrency level of the semaphore. The default value is
        <strong>10</strong>.</p>
      </td></tr><tr><td><code class="attributeName">fairness</code></td><td>
        <p>Fairness of the semaphore. The default value is
        <strong>false</strong>.</p>
      </td></tr><tr><td><code class="attributeName">interruptible</code></td><td>
        <p>Flag to determine if a thread may 