Research on the principles of technical principles of JATTTY EXTRA :: Asynchronous HTTP Client
Jetty Extra: Research on the Technical Principles of asynchronous HTTP client framework technical principles
Overview:
Jetty Extra is an additional module of the Jetty project, which provides a powerful asynchronous HTTP client framework.This article will focus on the technical principles of the Jetty Extra framework, covering the sending and processing of asynchronous requests, optimization of multi -threaded, and the management of connection pools.
1. Sending and processing of asynchronous requests:
By using Jetty's asynchronous HTTP client framework, we can not block the calling thread when sending a request, thereby achieving a more efficient concurrent request processing.Specific steps are as follows:
1.1 Create an asynchronous HTTP client object:
Use the Jetty's `httpclient` class to create an asynchronous HTTP client object. This object will be responsible for sending and receiving the HTTP request.
Example code:
HttpClient httpClient = new HttpClient();
httpClient.start();
1.2 Create an asynchronous request:
Use the `Request` class to create an asynchronous request object, set the request URL, HTTP method, head information, and request load.
Example code:
Request request = httpClient.newRequest("https://api.example.com");
request.method(HttpMethod.GET);
request.header(HttpHeader.ACCEPT, "application/json");
request.param("param1", "value1");
1.3 Send asynchronous request:
Send asynchronous requests through asynchronous HTTP client objects.
Example code:
ContentResponse response = request.send();
1.4 Processing asynchronous response:
Processing asynchronous response results by callback function.The Jetty Extra framework provides a variety of asynchronous request callbacks, such as the callback function, encapsulating the response to the `Future` object, etc.
Example code:
CompletableFuture<ContentResponse> future = request.send();
future.thenAccept(response -> {
// Treatment the response results
System.out.println(response.getContentAsString());
});
2. Optimization of multi -threading:
In order to achieve higher parallel capabilities, the Jetty Extra framework uses multi -threaded technology to improve the processing efficiency of requests.
2.1 Configuration of thread pool:
By setting up a reasonable thread pool parameter, the number of concurrent requests and the size of the thread pool can be controlled.
Example code:
HttpClient httpClient = new HttpClient();
httpClient.Setexecutor (new queueredthreadpool (200)); // Set the thread pool size of 200 to 200
2.2 Thread execution of event drive:
The Jetty Extra framework uses an event -driven method to perform the request processing. When the request can be written, readable, orout, the corresponding event processing method is called.
Example code:
FuturePromise<ContentResponse> promise = new FuturePromise<>();
request.send(promise);
promise.addListener(new FuturePromise.Checked<ContentResponse>() {
@Override
public void succeeded(ContentResponse response) {
// Successful response
}
@Override
public void failed(Throwable x) {
// Processing failure response
}
});
3. Management of connecting pool:
In order to improve the efficiency, the Jetty Extra framework uses the connection pool to manage the HTTP connection to reuse the connection object and create a new connection when needed.
Example code:
HttpClient httpClient = new HttpClient();
httpclient.setmaxConnectionSperDestination (100); // Set the maximum number of connections of each target host
in conclusion:
By studying the technical principles of the Jetty Extra framework, we can learn how to use this powerful asynchronous HTTP client framework to achieve efficient concurrent request processing.From the aspects of creating asynchronous requests, processing asynchronous response, optimization of multi -threads, and management connection pools, we can better use the Jetty Extra framework to improve the performance and scalability of the application.
In short, Jetty Extra: The research of asynchronous HTTP client framework technology provides developers with a powerful tool to achieve efficient asynchronous HTTP requests and response processing.
