Example usage for org.apache.http.impl.nio.client CloseableHttpAsyncClient start

Introduction

In this page you can find the example usage for org.apache.http.impl.nio.client CloseableHttpAsyncClient start.

Prototype

public abstract void start();

Source Link

Usage

From source file:org.wso2.carbon.device.mgt.iot.firealarm.api.FireAlarmControllerService.java

private String sendCommandViaHTTP(final String deviceIp, int deviceServerPort, String callUrlPattern,
        boolean fireAndForgot) throws DeviceManagementException {

    if (deviceServerPort == 0) {
        deviceServerPort = 80;//  w  ww  . j  av a  2s .c o  m
    }

    String responseMsg = "";
    String urlString = URL_PREFIX + deviceIp + ":" + deviceServerPort + callUrlPattern;

    if (log.isDebugEnabled()) {
        log.debug(urlString);
    }

    if (!fireAndForgot) {
        HttpURLConnection httpConnection = getHttpConnection(urlString);

        try {
            httpConnection.setRequestMethod(HttpMethod.GET);
        } catch (ProtocolException e) {
            String errorMsg = "Protocol specific error occurred when trying to set method to GET" + " for:"
                    + urlString;
            log.error(errorMsg);
            throw new DeviceManagementException(errorMsg, e);
        }

        responseMsg = readResponseFromGetRequest(httpConnection);

    } else {
        CloseableHttpAsyncClient httpclient = null;
        try {

            httpclient = HttpAsyncClients.createDefault();
            httpclient.start();
            HttpGet request = new HttpGet(urlString);
            final CountDownLatch latch = new CountDownLatch(1);
            Future<HttpResponse> future = httpclient.execute(request, new FutureCallback<HttpResponse>() {
                @Override
                public void completed(HttpResponse httpResponse) {
                    latch.countDown();
                }

                @Override
                public void failed(Exception e) {
                    latch.countDown();
                }

                @Override
                public void cancelled() {
                    latch.countDown();
                }
            });

            latch.await();

        } catch (InterruptedException e) {
            if (log.isDebugEnabled()) {
                log.debug("Sync Interrupted");
            }
        } finally {
            try {
                if (httpclient != null) {
                    httpclient.close();

                }
            } catch (IOException e) {
                if (log.isDebugEnabled()) {
                    log.debug("Failed on close");
                }
            }
        }

    }

    return responseMsg;
}