Use the AHC/Client framework to implement the asynchronous network request in the Java class library

Use the AHC/Client framework to implement the asynchronous network request in the Java class library Overview: When developing web applications, we often need to communicate with other servers.The traditional synchronization method will cause thread block when processing a large number of concurrent requests, which will cause the performance of the application to decrease.To solve this problem, we can use the AHC/Client framework to implement asynchronous network requests.AHC/Client is a Java -based asynchronous HTTP client framework. Its design goal is to provide good performance for high -combined browsers and HTTP clients. Configuration of AHC/Client: In order to use the AHC/Client framework, we first need to add the following dependencies to the pom.xml file of the Maven project: <dependency> <groupId>com.ning</groupId> <artifactId>async-http-client</artifactId> <version>2.5.1</version> </dependency> Implement asynchronous network requests: Next, we can use the following steps to implement asynchronous network requests: 1. Create AsynchttpClient instance: First of all, we need to create an AsynchttpClient instance that will be responsible for executing network requests.We can use its builder class to configure various parameters requests, such as connection timeout time, maximum number of connections, etc. AsyncHttpClient asyncHttpClient = new AsyncHttpClient(new DefaultAsyncHttpClientConfig.Builder() .setConnectTimeout(5000) .setMaxConnections(50) .build()); 2. Create a request object: We need to create a RequestBuilder object to build our request.You can set the requested URL, request header and request body. Request request = asyncHttpClient.prepareGet("http://www.example.com") .addHeader("Accept", "application/json") .addQueryParam("param1", "value1") .build(); 3. Send asynchronous request: Use the Executerequest method of AsynChttpClient to send asynchronous requests, and you can add a callback function to process the response result of the request. asyncHttpClient.executeRequest(request, new AsyncCompletionHandler<Response>() { @Override public Response onCompleted(Response response) throws Exception { // Treatment the response results System.out.println(response.getResponseBody()); return response; } @Override public void onThrowable(Throwable t) { // Treatment abnormalities t.printStackTrace(); } }); Complete code example: import org.asynchttpclient.*; import java.util.concurrent.Future; public class AsyncHttpClientExample { public static void main(String[] args) throws Exception { // Create AsynchttpClient instance AsyncHttpClient asyncHttpClient = new DefaultAsyncHttpClient(new DefaultAsyncHttpClientConfig.Builder().build()); // Create a request object Request request = asyncHttpClient.prepareGet("http://www.example.com") .addHeader("Accept", "application/json") .build(); // Send asynchronous request asyncHttpClient.executeRequest(request, new AsyncCompletionHandler<Response>() { @Override public Response onCompleted(Response response) throws Exception { // Treatment the response results System.out.println("Response Code: " + response.getStatusCode()); System.out.println("Response Body: " + response.getResponseBody()); return response; } @Override public void onThrowable(Throwable t) { // Treatment abnormalities t.printStackTrace(); } }); // Close asynchttpclient instance asyncHttpClient.close(); } } Summarize: By using the AHC/Client framework, we can implement asynchronous network requests in the Java class library.In the above example, we introduced the basic usage and configuration of AHC/Client, and how to use AHC/Client to send asynchronous network requests and process the response results.Using asynchronous network requests can improve the complicated processing capacity of the application, thereby improving the overall performance.