// So that is why we cancel only in the case of CAS success.
            taskFuture.cancel(false);
          }
        };
    // Adding the listener to both futures guarantees that newFuture will always be set. Adding to
    // taskFuture guarantees completion if the callable is invoked, and adding to outputFuture
    // propagates cancellation if the callable has not yet been invoked.
    outputFuture.addListener(listener, directExecutor());

    public void test_add_validParameters() {
        TestScriptEngine engine = new TestScriptEngine();
        scriptEngineFactory.add("testEngine", engine);

        // Verify engine is accessible by name
        ScriptEngine retrieved = scriptEngineFactory.getScriptEngine("testengine");
        assertNotNull(retrieved);
        assertEquals(engine, retrieved);

        // Verify engine is accessible by class simple name

And then you also read how to handle [CORS with the `CORSMiddleware`](../tutorial/cors.md){.internal-link target=_blank}.

In this section we'll see how to use other middlewares.

## Adding ASGI middlewares { #adding-asgi-middlewares }

As **FastAPI** is based on Starlette and implements the <abbr title="Asynchronous Server Gateway Interface">ASGI</abbr> specification, you can use any ASGI middleware.

    codePointString: String,
    encoding: UrlComponentEncodingTester.Encoding,
    component: Component,
  ) {
    testToUrl(codePoint, encoding, component)
    testFromUrl(codePoint, encoding, component)
    testUri(codePoint, codePointString, encoding, component)
  }

  private fun testToUrl(
    codePoint: Int,
    encoding: UrlComponentEncodingTester.Encoding,
    component: Component,
  ) {

        // Verify
        assertEquals(22, bytesDecoded);
        assertEquals(expectedEndOfFile, fileStandardInfo.getSize());
    }

    @Test
    @DisplayName("Test decode with delete pending false and directory false")
    void testDecodeWithFalseFlags() throws SMBProtocolDecodingException {
        // Prepare test data
        byte[] buffer = new byte[22];
        long expectedAllocationSize = 4096L;

totype={constructor:at,init:function(e,t,n,r,i,o){this.elem=e,this.prop=n,this.easing=i||ce.easing._default,this.options=t,this.start=this.now=this.cur(),this.end=r,this.unit=o||(ce.cssNumber[n]?"":"px")},cur:function(){var e=at.propHooks[this.prop];return e&&e.get?e.get(this):at.propHooks._default.get(this)},run:function(e){var t,n=at.propHooks[this.prop];return this.options.duration?this.pos=t=ce.easing[this.easing](e,this.options.duration*e,0,1,this.options.duration):this.pos=t=e,this.now=(th...

    /**
     * Create RDMA connection to remote endpoint
     *
     * @param remote remote socket address
     * @param local local socket address, may be null for auto-binding
     * @return new RDMA connection instance
     * @throws IOException if connection creation fails
     */
    RdmaConnection createConnection(InetSocketAddress remote, InetSocketAddress local) throws IOException;

)

var (
	ilmExpiryPendingTasksMD             = NewGaugeMD(expiryPendingTasks, "Number of pending ILM expiry tasks in the queue")
	ilmTransitionActiveTasksMD          = NewGaugeMD(transitionActiveTasks, "Number of active ILM transition tasks")
	ilmTransitionPendingTasksMD         = NewGaugeMD(transitionPendingTasks, "Number of pending ILM transition tasks in the queue")

			// be sent, for the time being keep this work around.
			// Adding a *TODO* to remove this later when Golang server
			// doesn't filter out the 'Expect' header.
			extractedSignedHeaders.Set(header, "100-continue")
		case "host":
			// Go http server removes "host" from Request.Header
			extractedSignedHeaders.Set(header, r.Host)
		case "transfer-encoding":
			// Go http server removes "host" from Request.Header

      .build()
  }

  internal fun lookupDecompressor(encoding: String): DecompressionAlgorithm? =
    algorithms.find {
      it.encoding.equals(encoding, ignoreCase = true)
    }

  /**
   * A decompression algorithm such as Gzip. Must provide the Accept-Encoding value and decompress a Source.
   */
  interface DecompressionAlgorithm {
    val encoding: String

    fun decompress(compressedSource: BufferedSource): Source