HTTP request framework in the Java class library, the performance optimization and adjustment skills of the HTTP request framework

HTTP request framework in the Java class library, the performance optimization and adjustment skills of the HTTP request framework With the rapid development of the Internet, HTTP requests have become an indispensable part of our daily development.In the Java class library, there are many mature HTTP request frameworks, such as Apache HTTPClient, OKHTTP, etc. They provide powerful functions and rich APIs to facilitate us to communicate network communications.However, when we face a large number of concurrent requests or high loads, we need to optimize and adjust the HTTP request framework to ensure the stability and response speed of the system. The following will introduce the performance optimization and tuning skills of the HTTP request framework in the common Java class library. 1. Use the connection pool: The connection pool is a repeated mechanism that repeatedly uses the connection to avoid frequent creation and destroying the overhead of the connection, which can greatly improve the performance of the system.For example, in Apache httpclient, you can use the PoolinghttpClientConnectionManager to manage the connection pool. By setting up parameters of the connection pool size, maximum connection, timeout time, etc., the reuse and utilization rate of the connection is optimized. Code example: CloseableHttpClient httpClient = HttpClients.custom() .setConnectionManager(new PoolingHttpClientConnectionManager()) .build(); 2. Reasonable use of thread pools: In high -parallel scenes, using a single thread processing request may cause performance bottleneck.You can process concurrent requests by using a thread pool. When a new request arrives, it can be assigned to the free threads in the thread pool for handling.This can make full use of system resources to improve the concurrent processing capacity of the system. Code example: ExecutorService executorService = Executors.newFixedThreadPool(10); CompletableFuture<String> future = CompletableFuture.supplyAsync(() -> { // Send the code requested by HTTP }, executorService); 3. Reasonable set timeout time: In the actual network environment, a HTTP request may take a long time to respond due to network delay and server load.In order to avoid long -term obstruction, we can control the maximum waiting time of the request by setting up a reasonable timeout time.For example, in Apache httpclients, parameters such as ConnectionRequestTimeOut, ConnectTimeOut, Sockettimeout and other parameters can be set to control the timeout of different stages. Code example: CloseableHttpClient httpClient = HttpClients.custom() .setDefaultRequestConfig(RequestConfig.custom() .setConnectionRequestTimeout(5000) .setConnectTimeout(5000) .setSocketTimeout(5000) .build()) .build(); 4. Reasonable use of cache: In some scenarios, the response of HTTP requests will be frequently requested. At this time, the cache can store the response results, reduce duplicate network requests, and improve system performance.For example, you can use Guava Cache to achieve a simple HTTP result cache. Code example: Cache<String, String> cache = CacheBuilder.newBuilder() .expireAfterWrite(10, TimeUnit.MINUTES) .build(); String result = cache.getIfPresent(url); if (result == null) { // Send the code requested by the http and save the result into the cache result = sendHttpRequest(url); cache.put(url, result); } responding speed.In actual development, you need to choose the appropriate optimization solution according to the specific scenes and needs, and perform performance testing and adjustment to obtain the best performance.