Added example demonstrating how to get details of the underlying conn…

…ection endpoint

httpclient5/src/test/java/org/apache/hc/client5/http/examples/ClientRemoteEndpointDetails.java

@@ -0,0 +1,93 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+
+package org.apache.hc.client5.http.examples;
+
+import org.apache.hc.client5.http.classic.methods.HttpGet;
+import org.apache.hc.client5.http.classic.methods.HttpHead;
+import org.apache.hc.client5.http.impl.classic.CloseableHttpClient;
+import org.apache.hc.client5.http.impl.classic.HttpClients;
+import org.apache.hc.client5.http.protocol.HttpClientContext;
+import org.apache.hc.core5.http.EndpointDetails;
+import org.apache.hc.core5.http.io.entity.EntityUtils;
+import org.apache.hc.core5.http.message.StatusLine;
+
+/**
+ * This example demonstrates how to get details of the underlying connection endpoint.
+ */
+public class ClientRemoteEndpointDetails {
+
+    public static void main(final String[] args) throws Exception {
+        try (final CloseableHttpClient httpclient = HttpClients.createDefault()) {
+            // Create local HTTP context
+            final HttpClientContext localContext = new HttpClientContext();
+
+            final HttpGet httpget = new HttpGet("http://httpbin.org/get");
+            System.out.println("Executing request " + httpget.getMethod() + " " + httpget.getUri());
+
+            // Pass local context as a parameter
+            httpclient.execute(httpget, localContext, response -> {
+                System.out.println("----------------------------------------");
+                System.out.println(httpget + "->" + new StatusLine(response));
+                EntityUtils.consume(response.getEntity());
+
+                final EndpointDetails endpointDetails = localContext.getEndpointDetails();
+                System.out.println("Remote address: " + endpointDetails.getRemoteAddress());
+                System.out.println("Request counts: " + endpointDetails.getRequestCount());
+                System.out.println("Response counts: " + endpointDetails.getResponseCount());
+                System.out.println("Bytes sent: " + endpointDetails.getSentBytesCount());
+                System.out.println("Bytes received: " + endpointDetails.getReceivedBytesCount());
+
+                return null;
+            });
+
+            // EndpointDetails is present in the context even if the underlying connection
+            // gets immediately released back to the connection pool
+
+            final HttpHead httphead = new HttpHead("http://httpbin.org/get");
+            System.out.println("Executing request " + httphead.getMethod() + " " + httphead.getUri());
+
+            // Pass local context as a parameter
+            httpclient.execute(httphead, localContext, response -> {
+                System.out.println("----------------------------------------");
+                System.out.println(httphead + "->" + new StatusLine(response));
+                EntityUtils.consume(response.getEntity());
+
+                final EndpointDetails endpointDetails = localContext.getEndpointDetails();
+                System.out.println("Remote address: " + endpointDetails.getRemoteAddress());
+                System.out.println("Request counts: " + endpointDetails.getRequestCount());
+                System.out.println("Response counts: " + endpointDetails.getResponseCount());
+                System.out.println("Bytes sent: " + endpointDetails.getSentBytesCount());
+                System.out.println("Bytes received: " + endpointDetails.getReceivedBytesCount());
+
+                return null;
+            });
+        }
+    }
+
+}
+