# OpenAPI Callbacks { #openapi-callbacks }

You could create an API with a *path operation* that could trigger a request to an *external API* created by someone else (probably the same developer that would be *using* your API).

        // Given
        when(mockTreeHandle.isSMB2()).thenReturn(true);
        when(mockTreeHandle.getSendBufferSize()).thenReturn(65536);
        when(mockFileHandle.isValid()).thenReturn(false, true); // First false to trigger ensureOpen, then true
        when(mockFileHandle.getFileId()).thenReturn(new byte[16]);
        when(mockFileHandle.acquire()).thenReturn(mockFileHandle);

        // Mock for ensureOpen to reopen file

    awaitTimedWaiting(waiter);
    service.shutdown();
    Uninterruptibles.joinUninterruptibly(waiter, 10, SECONDS);
    if (waiter.isAlive()) {
      waiter.interrupt();
      fail("awaitTermination failed to trigger after shutdown()");
    }
  }

  /** Wait for the given thread to reach the {@link State#TIMED_WAITING} thread state. */
  @SuppressWarnings("ThreadPriorityCheck") // TODO: b/175898629 - Consider onSpinWait.

  }

  /*
   * c.g.c.collect.testing.Helpers.misleadingSizeList has a broken Iterator, so we can't use it. (I
   * mean, ideally we'd fix it....) Also, we specifically need a List so that we trigger the fast
   * path in join(Iterable).
   */
  private static final class MisleadingSizeList<E extends @Nullable Object>
      extends ForwardingList<E> {
    final List<E> delegate;
    final int delta;

n e.onClick(t)})}},{key:"onClick",value:function(t){var e=t.delegateTarget||t.currentTarget,n=this.action(e)||"copy",t=s({action:n,container:this.container,target:this.target(e),text:this.text(e)});this.emit(t?"success":"error",{action:n,text:t,trigger:e,clearSelection:function(){e&&e.focus(),window.getSelection().removeAllRanges()}})}},{key:"defaultAction",value:function(t){return m("action",t)}},{key:"defaultTarget",value:function(t){t=m("target",t);if(t)return document.querySelector(t)}},{key...

        assertNotNull(s2);
        assertEquals(1, transport.getNumSessions(), "Should reuse existing session");
        s2.close();
    }

    @Test
    @DisplayName("DFS referrals: invalid double-slash prefix triggers exception")
    void dfsReferrals_invalidPath() {
        CIFSException ex = assertThrows(CIFSException.class, () -> transport.getDfsReferrals(ctx, "\\\\server\\share", null, null, 1));

      </description>
      <fields>
        <field>
          <name>activation</name>
          <version>1.0.0+</version>
          <description>
            The conditional logic which will automatically trigger the inclusion of this profile.
          </description>
          <association>
            <type>Activation</type>
          </association>
        </field>
        <field>
          <name>properties</name>

            deferred.resolve(new SuggestResponse("", 0, Collections.emptyList(), 0, null));
        });
        resolver.start();

        // Register another callback and trigger resolve at about the same time
        Thread.sleep(50);
        resolveLatch.countDown();
        deferred.promise().then(response -> {
            callbackCount.incrementAndGet();
            callbackLatch.countDown();

        byte[] data = new byte[] { 1, 2, 3, 4 };
        InputStream in = new ByteArrayInputStream(concat(messageHeader(4), data));
        SocketInputStream sis = new SocketInputStream(in);

        // Read one byte to trigger message header processing
        assertEquals(1, sis.read());

        // 3 bytes should remain available in current message
        assertEquals(3, sis.available());

        // Read another byte

                svc = this.service;
                if (svc == null) {
                    // there still is some kind of race condition, where?
                    // this used to trigger "invalid operation..."
                    throw new SmbException("Service is null in state " + this.connectionState.get());
                }
                checkRequest(transport, req, svc);

            }