HttpAsyncClient 做并发长连接的一个实例

HttpAsyncClient 做并发长连接的一个实例

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 AsyncClientHttpExchangeFutureCallback {

 public static void main(final String[] args) throws Exception {
 RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(300000)
.setConnectTimeout(300000).build();
 CloseableHttpAsyncClient httpclient = HttpAsyncClients.custom()
.setDefaultRequestConfig(requestConfig).setMaxConnTotal(1000).setMaxConnPerRoute(1000)//此处为多并发设置
.build();
 try {
httpclient.start();
 HttpGet[] requests =new HttpGet[900];
 for (int i = 0; i < 900; i++) {

 requests[i] = new HttpGet("http://192.168.71.192:8100/sub?cname="+i);

}
 final CountDownLatch latch = new CountDownLatch(requests.length+1);
 for (final HttpGet request: requests) {
 httpclient.execute(request, new FutureCallback<HttpResponse>() {

 public void completed(final HttpResponse response) {
latch.countDown();
 System.out.println(request.getRequestLine() +"->"+ response.getStatusLine());
}

 public void failed(final Exception ex) {
latch.countDown();
 System.out.println(request.getRequestLine() +"->"+ ex);
}

 public void cancelled() {
latch.countDown();
 System.out.println(request.getRequestLine() +"cancelled");
}

});
}
latch.await();
 System.out.println("Shutting down");
 } finally {
httpclient.close();
}
System.out.println("Done");
}

}