I am pretty new to Apache http client and am trying to get status code from a website. Found the following example on Apache http tutorial.
import java.util.concurrent.CountDownLatch;
import org.apache.http.HttpResponse;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.concurrent.FutureCallback;
import org.apache.http.impl.nio.client.CloseableHttpAsyncClient;
import org.apache.http.impl.nio.client.HttpAsyncClients;
public class Abc {
static long d2;
public static void main(final String[] args) throws Exception {
d2=System.currentTimeMillis();
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(3000)
.setConnectTimeout(3000).build();
CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
.setDefaultRequestConfig(requestConfig)
.build();
try {
httpclient.start();
final HttpGet[] requests = new HttpGet[] {
new HttpGet("http://192.168.26.175:8080/examples/eye/abc10000.jsp")
};
final CountDownLatch latch = new CountDownLatch(1);
for (int v=0;v<1000;v++) {
httpclient.execute(requests[0], new FutureCallback<HttpResponse>() {
public void completed(final HttpResponse response) {
latch.countDown();
System.out.println(requests[0].getRequestLine() + "->" + response.getStatusLine());
}
public void failed(final Exception ex) {
latch.countDown();
System.out.println(requests[0].getRequestLine() + "->" + ex);
}
public void cancelled() {
latch.countDown();
System.out.println(requests[0].getRequestLine() + " cancelled");
}
});
}
latch.await();
System.out.println("Shutting down");
} finally {
httpclient.close();
}
System.out.println("Done");
long d1=System.currentTimeMillis();
System.out.println(d1-d2);
}
}
Is it really asynchronous or are the calls made serially. What has to be done to make calls asynchronous and faster.
As the requests are going through the same route following changes will have to be made.
CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
.setDefaultRequestConfig(requestConfig)
.setMaxConnPerRoute(1000)
.setMaxConnTotal(1000)
.build();