package si.najdi.httpclient;

import javax.ws.rs.ProcessingException;
import javax.ws.rs.core.Response;

import org.apache.http.client.config.RequestConfig;
import org.apache.http.config.SocketConfig;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.PoolingHttpClientConnectionManager;
import org.jboss.resteasy.client.jaxrs.ResteasyClient;
import org.jboss.resteasy.client.jaxrs.ResteasyClientBuilder;
import org.jboss.resteasy.client.jaxrs.ResteasyWebTarget;
import org.jboss.resteasy.client.jaxrs.engines.ApacheHttpClient4Engine;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class Main {

	static Logger logger = LoggerFactory.getLogger(Main.class);
	
	public static void main(String[] args) {
        
		logger.info("Starting HttpClient test.");
		
		SocketConfig socketConfig = SocketConfig.custom()
			    .setTcpNoDelay(true)
			    .setSoKeepAlive(true)
			    .setSoReuseAddress(true)
			    .build();
			
		PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager();
		connManager.setMaxTotal(100);
		connManager.setDefaultMaxPerRoute(100);
		connManager.setDefaultSocketConfig(socketConfig);
		
		RequestConfig defaultRequestConfig = RequestConfig.custom()
			    .setSocketTimeout(2000)
			    .setConnectTimeout(100)
			    .setConnectionRequestTimeout(3000)
			    .setStaleConnectionCheckEnabled(true)
			    .build();
		
		CloseableHttpClient httpClient = HttpClients.custom()
			    .setDefaultRequestConfig(defaultRequestConfig)
			    .setConnectionManager(connManager)
			    .build();
		
		ApacheHttpClient4Engine apacheHttpClient4Engine = new ApacheHttpClient4Engine(httpClient);
		
		ResteasyClient client = new ResteasyClientBuilder().httpEngine(apacheHttpClient4Engine).build();
		
		//String host = "http://httpstat.us/400";
		String host = "http://fake-response.appspot.com/?sleep=7";
		ResteasyWebTarget newsWebTarget = client.target(host);
		
		NewsClient newsClient = newsWebTarget.proxy(NewsClient.class);
		
		boolean ok = false;

		Response response = null;
		try {
			logger.info("Calling...");
			response = newsClient.clickIncrement("666");
			logger.info("...returning");

			if (response.getStatus() == Response.Status.OK.getStatusCode()) {
				String line = (String) response.readEntity(String.class);
				logger.info("Response line: " + line);
			} else {
				String failMessage = response.getStatusInfo().getStatusCode() + " " + response.getStatusInfo().getReasonPhrase();
				logger.warn("Failed call. Reason: " + failMessage);
			}
		} catch (ProcessingException e) {
			logger.warn("Exception incrementing click counter." + e);
			
		} finally {
			if (response != null) {
				response.close();
			}
		}
    }
}

import javax.ws.rs.DefaultValue;
import javax.ws.rs.GET;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.core.Response;

public interface NewsClient {

    @GET
    //@Path("clickcounter/news/{newsId}")
    Response clickIncrement(@PathParam("newsId") @DefaultValue("123") String newsId);
    
}

[12:05:46] INFO  [si.najdi.httpclient.Main]: Starting HttpClient test.
[12:05:47] DEBUG [org.jboss.resteasy.plugins.providers.DocumentProvider]: Unable to retrieve config: expandEntityReferences defaults to true
[12:05:47] DEBUG [org.jboss.resteasy.plugins.providers.DocumentProvider]: Unable to retrieve config: expandEntityReferences defaults to true
[12:05:47] INFO  [si.najdi.httpclient.Main]: Calling...
[12:05:54] INFO  [si.najdi.httpclient.Main]: ...returning
[12:05:54] INFO  [si.najdi.httpclient.Main]: Response line: {"response":"This request has finsihed sleeping for 7 seconds"}