Jetty Extra :: Asynchronous http client framework technical analysis
Jetty Extra is a Jetty -based asynchronous HTTP client framework, which provides a set of convenient and easy -to -use APIs for performing asynchronous HTTP requests.By using this framework, developers can easily send HTTP requests in Java applications and process response data.
Jetty Extra is based on the core library of Jetty, using NIO technology and asynchronous non -blocking IO processing mechanism provided by Jetty to achieve high -performance HTTP requests.This framework can handle multiple concurrency requests by using non -blocking IO and event drive to improve the throughput and performance of the system.
When using Jetty Extra to make asynchronous HTTP requests, you first need to create an HTTPClient object.HTTPClient is the core of the entire framework and is responsible for managing and executing HTTP requests.Related configurations can be performed according to the needs, such as setting the connection timeout time, the maximum number of concurrent connections, etc.
Next, before launching asynchronous requests, you need to create a Request object to describe the specific HTTP request.You can set parameters such as URL, request method, and request header.Then pass the Request object to the send method of HTTPClient, initiate asynchronous requests, and specify a callback function.
The callback function is an object that implements the response.completelistener interface to process the response data used to process asynchronous requests.In the callback function, the response status code, response header, response content, etc. can be obtained.Developers can process response data according to specific needs, such as parsing JSON data and extracting key information.
Here are a sample code that uses Jetty Extra to make asynchronous HTTP requests:
import org.eclipse.jetty.client.HttpClient;
import org.eclipse.jetty.client.api.Request;
import org.eclipse.jetty.client.api.Response;
import org.eclipse.jetty.util.ssl.SslContextFactory;
public class AsyncHttpClientExample {
public static void main(String[] args) throws Exception {
HttpClient httpClient = new HttpClient(new SslContextFactory.Client());
httpClient.start();
Request request = httpClient.newRequest("https://api.example.com")
.method(HttpMethod.GET)
.header(HttpHeader.ACCEPT, "application/json");
request.send(new Response.CompleteListener() {
@Override
public void onComplete(Result result) {
if (result.isSucceeded()) {
Response response = result.getResponse();
int status = response.getStatus();
String content = response.getContentAsString();
// Processing response data
} else {
Throwable failure = result.getFailure();
// Processing request failure
}
}
});
}
}
In the above code, a HTTPClient object was first created and it was started.Then, a Request object was created, the requested URL and request method were set, and a request header was added.Finally, by calling the Send method of the HTTPClient, an asynchronous request was initiated and a callback function was specified for the request.
In the OnComplete method of the callback function, first determine whether the request is successful by the Result object.If you succeed, you can get the response status code and content through the Response object.Developers can process the response data as needed.If the request fails, you can get the specific reasons for failure through the Result object, and you can process it according to specific needs.
In short, Jetty Extra is a powerful asynchronous HTTP client framework that can provide high -performance HTTP request processing capabilities.Through reasonable configuration and flexible use, asynchronous request needs in various scenarios can be met.
