Examples with FutureRequestExecutionService org.apache.hc.client5.http.impl.classic.FutureRequestExecutionService used on opensource projects

Example 1 with FutureRequestExecutionService

use of org.apache.hc.client5.http.impl.classic.FutureRequestExecutionService in project mercury by yellow013.

the class ClientWithRequestFuture method main.

public static void main(final String[] args) throws Exception {
    // the simplest way to create a HttpAsyncClientWithFuture
    final HttpClientConnectionManager cm = PoolingHttpClientConnectionManagerBuilder.create().setMaxConnPerRoute(5).setMaxConnTotal(5).build();
    final CloseableHttpClient httpclient = HttpClientBuilder.create().setConnectionManager(cm).build();
    final ExecutorService execService = Executors.newFixedThreadPool(5);
    try (final FutureRequestExecutionService requestExecService = new FutureRequestExecutionService(httpclient, execService)) {
        // Because things are asynchronous, you must provide a HttpClientResponseHandler
        final HttpClientResponseHandler<Boolean> handler = new HttpClientResponseHandler<Boolean>() {

            @Override
            public Boolean handleResponse(final ClassicHttpResponse response) throws IOException {
                // simply return true if the status was OK
                return response.getCode() == HttpStatus.SC_OK;
            }
        };
        // Simple request ...
        final HttpGet request1 = new HttpGet("http://httpbin.org/get");
        final FutureTask<Boolean> futureTask1 = requestExecService.execute(request1, HttpClientContext.create(), handler);
        final Boolean wasItOk1 = futureTask1.get();
        System.out.println("It was ok? " + wasItOk1);
        // Cancel a request
        try {
            final HttpGet request2 = new HttpGet("http://httpbin.org/get");
            final FutureTask<Boolean> futureTask2 = requestExecService.execute(request2, HttpClientContext.create(), handler);
            futureTask2.cancel(true);
            final Boolean wasItOk2 = futureTask2.get();
            System.out.println("It was cancelled so it should never print this: " + wasItOk2);
        } catch (final CancellationException e) {
            System.out.println("We cancelled it, so this is expected");
        }
        // Request with a timeout
        final HttpGet request3 = new HttpGet("http://httpbin.org/get");
        final FutureTask<Boolean> futureTask3 = requestExecService.execute(request3, HttpClientContext.create(), handler);
        final Boolean wasItOk3 = futureTask3.get(10, TimeUnit.SECONDS);
        System.out.println("It was ok? " + wasItOk3);
        final FutureCallback<Boolean> callback = new FutureCallback<Boolean>() {

            @Override
            public void completed(final Boolean result) {
                System.out.println("completed with " + result);
            }

            @Override
            public void failed(final Exception ex) {
                System.out.println("failed with " + ex.getMessage());
            }

            @Override
            public void cancelled() {
                System.out.println("cancelled");
            }
        };
        // Simple request with a callback
        final HttpGet request4 = new HttpGet("http://httpbin.org/get");
        // using a null HttpContext here since it is optional
        // the callback will be called when the task completes, fails, or is cancelled
        final FutureTask<Boolean> futureTask4 = requestExecService.execute(request4, HttpClientContext.create(), handler, callback);
        final Boolean wasItOk4 = futureTask4.get(10, TimeUnit.SECONDS);
        System.out.println("It was ok? " + wasItOk4);
    }
}