Examples of com.ning.http.client.AsyncHttpClient

com.ning.http.client.AsyncHttpClient
ing.com/").execute();}The code above will block until the response is fully received. To execute asynchronous HTTP request, you create an {@link AsyncHandler} or its abstract implementation, {@link com.ning.http.client.AsyncCompletionHandler}{@code AsyncHttpClient c = new AsyncHttpClient(); Future f = c.prepareGet("http://www.ning.com/").execute(new AsyncCompletionHandler() { @Override public Response onCompleted(Response response) throws IOException { // Do something return response; } @Override public void onThrowable(Throwable t) { } }); Response response = f.get(); // We are just interested to retrieve the status code. Future f = c.prepareGet("http://www.ning.com/").execute(new AsyncCompletionHandler() { @Override public Integer onCompleted(Response response) throws IOException { // Do something return response.getStatusCode(); } @Override public void onThrowable(Throwable t) { } }); Integer statusCode = f.get();}The {@link AsyncCompletionHandler#onCompleted(com.ning.http.client.Response)} will be invoked once the http response has been fully read, which includethe http headers and the response body. Note that the entire response will be buffered in memory. You can also have more control about the how the response is asynchronously processed by using a {@link AsyncHandler}{@code AsyncHttpClient c = new AsyncHttpClient(); Future f = c.prepareGet("http://www.ning.com/").execute(new AsyncHandler() { private StringBuilder builder = new StringBuilder(); @Override public STATE onStatusReceived(HttpResponseStatus s) throws Exception { // return STATE.CONTINUE or STATE.ABORT return STATE.CONTINUE}@Override public STATE onHeadersReceived(HttpResponseHeaders bodyPart) throws Exception { // return STATE.CONTINUE or STATE.ABORT return STATE.CONTINUE } @Override public STATE onBodyPartReceived(HttpResponseBodyPart bodyPart) throws Exception { builder.append(new String(bodyPart)); // return STATE.CONTINUE or STATE.ABORT return STATE.CONTINUE } @Override public String onCompleted() throws Exception { // Will be invoked once the response has been fully read or a ResponseComplete exception // has been thrown. return builder.toString(); } @Override public void onThrowable(Throwable t) { } }); String bodyResponse = f.get(); } From any {@link HttpContent} sub classes, you can asynchronously process the response status,headers and body and decide when tostop the processing the response by throwing a new {link ResponseComplete} at any moment. This class can also be used without the need of {@link AsyncHandler}
{@code AsyncHttpClient c = new AsyncHttpClient(); Future f = c.prepareGet(TARGET_URL).execute(); Response r = f.get();}Finally, you can configure the AsyncHttpClient using an {@link AsyncHttpClientConfig} instance
{@code AsyncHttpClient c = new AsyncHttpClient(new AsyncHttpClientConfig.Builder().setRequestTimeoutInMs(...).build()); Future f = c.prepareGet(TARGET_URL).execute(); Response r = f.get();}An instance of this class will cache every HTTP 1.1 connections and close them when the {@link AsyncHttpClientConfig#getIdleConnectionTimeoutInMs()}expires. This object can hold many persistent connections to different host.

  //ning === http://github.com/ning/async-http-client
  @Test
  public void doSimpleAsyncRequestTestWithNing() throws IOException, InterruptedException {
    int iterations = 100;
    final CountDownLatch latch = new CountDownLatch(iterations);
    AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
    for (int i = 1; i <= iterations; i++) {


      asyncHttpClient.prepareGet("http://localhost:" + PORT + "/").
      execute(new AsyncCompletionHandler<com.ning.http.client.Response>(){


        @Override
        public com.ning.http.client.Response onCompleted(com.ning.http.client.Response response) throws Exception{
          String body = response.getResponseBody();

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  @Test
  public void smallHttpPostBodyTest() throws ClientProtocolException, IOException, InterruptedException {
    final String body = "Roger Schildmeijer";
    final CountDownLatch latch = new CountDownLatch(1);
    AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
    asyncHttpClient.preparePost("http://localhost:" + PORT + "/echo").setBody(body).
    execute(new AsyncCompletionHandler<Response>(){


      @Override
      public Response onCompleted(Response response) throws Exception{
        assertNotNull(response);

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    for (int i = 1; i <= 1000; i++) {
      body += "Roger Schildmeijer: " + i + "\n";
    }
    final String expectedBody = body;
    final CountDownLatch latch = new CountDownLatch(1);
    AsyncHttpClient asyncHttpClient = new AsyncHttpClient();
    asyncHttpClient.preparePost("http://localhost:" + PORT + "/echo").setBody(body).
    execute(new AsyncCompletionHandler<Response>(){


      @Override
      public Response onCompleted(Response response) throws Exception{
        assertNotNull(response);

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    }


    @Test(timeOut = 20000)
    public void testSuspendTimeout() {
        logger.info("running test: testSuspendTimeout");
        AsyncHttpClient c = new AsyncHttpClient();
        try {
            long t1 = System.currentTimeMillis();
            Response r = c.prepareGet(urlTarget).execute().get(10, TimeUnit.SECONDS);
            assertNotNull(r);
            assertEquals(r.getStatusCode(), 200);
            String resume = r.getResponseBody();
            assertEquals(resume, "resume");
            long current = System.currentTimeMillis() - t1;
            assertTrue(current > 5000 && current < 10000);
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();


    }

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    @Test(timeOut = 60000)
    public void testSuspendTimeout() {
        logger.info("running test: testSuspendTimeout");


        AsyncHttpClient c = new AsyncHttpClient();
        try {
            long currentTime = System.currentTimeMillis();
            Response r = c.prepareGet(urlTarget).execute().get();


            long time = System.currentTimeMillis() - currentTime;
            if (time > 5000 && time < 15000) {
                assertTrue(true);
            } else {
                assertFalse(false);
            }
            assertNotNull(r);
            assertEquals(r.getStatusCode(), 200);
            String resume = r.getResponseBody();
            assertEquals(resume, "resume");
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();
    }

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    public void testResumeOnBroadcast() {
        logger.info("running test: testResumeOnBroadcast");


        final CountDownLatch latch = new CountDownLatch(1);
        servletLatch = new CountDownLatch(1);
        AsyncHttpClient c = new AsyncHttpClient();
        try {
            long currentTime = System.currentTimeMillis();
            final AtomicReference<Response> r = new AtomicReference();
            c.prepareGet(urlTarget).execute(new AsyncCompletionHandler<Response>() {


                @Override
                public Response onCompleted(Response response) throws Exception {
                    r.set(response);
                    latch.countDown();
                    return response;
                }
            });


            servletLatch.await();


            Broadcaster b = BroadcasterFactory.getDefault().lookup(DefaultBroadcaster.class, "/*");
            assertNotNull(b);
            b.broadcast("resume").get();


            try {
                latch.await();
            } catch (InterruptedException e) {
                fail(e.getMessage());
                return;
            }


            long time = System.currentTimeMillis() - currentTime;
            if (time < 5000) {
                assertTrue(true);
            } else {
                assertFalse(false);
            }
            assertNotNull(r.get());
            assertEquals(r.get().getStatusCode(), 200);
            String resume = r.get().getResponseBody();
            assertEquals(resume, "resumeresume");
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();
    }

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                    latch.countDown();
                }
            }
        }, new RecyclableBroadcaster("suspend"));


        AsyncHttpClient c = new AsyncHttpClient();
        try {
            Response r = c.prepareGet(urlTarget).execute().get();


            try {
                latch.await(20, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                fail(e.getMessage());
            }
            assertNotNull(r);
            assertEquals(r.getStatusCode(), 200);
            String resume = r.getResponseBody();
            assertEquals(resume, "resume");
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();
    }

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                    latch.countDown();
                }
            }
        }, new RecyclableBroadcaster("suspend"));


        AsyncHttpClient c = new AsyncHttpClient();
        try {
            Response r = c.prepareGet(urlTarget).execute().get();


            try {
                latch.await(20, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                fail(e.getMessage());
            }


            assertNotNull(r);
            assertEquals(r.getStatusCode(), 200);
            String resume = r.getResponseBody();
            assertEquals(resume, AtmosphereResourceImpl.createCompatibleStringJunk());
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();


    }

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                    latch.countDown();
                }
            }
        }, new RecyclableBroadcaster("suspend"));


        AsyncHttpClient c = new AsyncHttpClient();
        try {
            Response r = c.prepareGet(urlTarget).execute().get();


            if (latch.getCount() != 0) {
                fail("timedout");
            }
            assertNotNull(r);
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }


        c.close();


    }

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                    latch.countDown();
                }
            }
        }, new RecyclableBroadcaster("suspend"));


        AsyncHttpClient c = new AsyncHttpClient();
        try {
            c.prepareGet(urlTarget).execute(new AsyncCompletionHandler<String>() {


                @Override
                public String onCompleted(Response response) throws Exception {
                    try {
                        assertEquals(response.getResponseBody(),
                                AtmosphereResourceImpl.createCompatibleStringJunk());
                    } finally {
                        latch.countDown();
                    }
                    return null;
                }
            });


            suspended.await(20, TimeUnit.SECONDS);
            Response r = c.prepareGet(urlTarget).execute().get();


            try {
                latch.await(20, TimeUnit.SECONDS);
            } catch (InterruptedException e) {
                fail(e.getMessage());
            }


            assertNotNull(r);
            assertEquals(r.getStatusCode(), 200);
        } catch (Exception e) {
            logger.error("test failed", e);
            fail(e.getMessage());
        }
        c.close();
    }

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