Apache HttpClient Multiple polling connections to server strategy

Question

I'm setting up a Java client for a server that I poll periodically and send messages to based on particular response. The strategy I used for the class is as follows: ``` public class PollingClient { private HttpClient client = getHttpClient(); // I get a DefaultHttpClient this way so it's easier to add connection manager and strategy etc to the client later private HttpPost httpPost = getHttpPost(); // same idea, I set headers there public String poll () { List formparams = new ArrayList(); formparams.add(new BasicNameValuePair("id", someId)); String responseString = null; try { UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(formparams, "UTF-8"); httppost.setURI(polluri)); httppost.setEntity(formEntity); HttpResponse response = httpclient.execute(httppost); HttpEntity entity = response.getEntity(); if (entity != null) { responseString = EntityUtils.toString(entity); } EntityUtils.consume(entity); } catch (Exception e) { e.printStackTrace(); }…

Accepted Answer

@Saad's answer was very helpful, but I've experienced delays when trying to load test single url with many concurrent requests.

Here is updated version that resolved the problem.

```
    DefaultHttpClient client = new DefaultHttpClient();
    ClientConnectionManager mgr = client.getConnectionManager();
    HttpParams params = client.getParams();
    int maxConnections = 100;
    params.setParameter(ConnManagerPNames.MAX_CONNECTIONS_PER_ROUTE, new ConnPerRouteBean(maxConnections));
    params.setIntParameter(ConnManagerPNames.MAX_TOTAL_CONNECTIONS, maxConnections);
    ThreadSafeClientConnManager conman = new ThreadSafeClientConnManager(params, mgr.getSchemeRegistry());
    client = new DefaultHttpClient(conman, params);
```

Apache HttpClient Multiple polling connections to server strategy

Solution

Problem