sa-lessons/modules/module10/sections/06-network-optimization.md

Оптимизация сети

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• 📚 Модуль 10

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Оптимизация сети

1. Connection Pooling

// Оптимизация HTTP соединений
@Configuration
public class HttpClientConfig {
    @Bean
    public RestTemplate restTemplate() {
        HttpComponentsClientHttpRequestFactory factory = 
            new HttpComponentsClientHttpRequestFactory();
        
        // Настройка пула соединений
        PoolingHttpClientConnectionManager connectionManager = 
            new PoolingHttpClientConnectionManager();
        connectionManager.setMaxTotal(100);
        connectionManager.setDefaultMaxPerRoute(20);
        
        CloseableHttpClient httpClient = HttpClients.custom()
            .setConnectionManager(connectionManager)
            .setDefaultRequestConfig(RequestConfig.custom()
                .setConnectTimeout(5000)
                .setSocketTimeout(10000)
                .build())
            .build();
        
        factory.setHttpClient(httpClient);
        return new RestTemplate(factory);
    }
}

2. Compression

// Сжатие HTTP ответов
@Configuration
public class CompressionConfig {
    @Bean
    public FilterRegistrationBean<CompressionFilter> compressionFilter() {
        FilterRegistrationBean<CompressionFilter> registration = 
            new FilterRegistrationBean<>();
        registration.setFilter(new CompressionFilter());
        registration.addUrlPatterns("/*");
        registration.setName("compressionFilter");
        registration.setOrder(1);
        return registration;
    }
}

@Component
public class CompressionFilter implements Filter {
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, 
                        FilterChain chain) throws IOException, ServletException {
        
        HttpServletRequest httpRequest = (HttpServletRequest) request;
        HttpServletResponse httpResponse = (HttpServletResponse) response;
        
        String acceptEncoding = httpRequest.getHeader("Accept-Encoding");
        if (acceptEncoding != null && acceptEncoding.contains("gzip")) {
            httpResponse.setHeader("Content-Encoding", "gzip");
            GzipResponseWrapper gzipResponse = new GzipResponseWrapper(httpResponse);
            chain.doFilter(request, gzipResponse);
            gzipResponse.finish();
        } else {
            chain.doFilter(request, response);
        }
    }
}

3. CDN Integration

// Интеграция с CDN
@Service
public class CDNService {
    @Value("${cdn.base-url}")
    private String cdnBaseUrl;
    
    public String getCDNUrl(String path) {
        return cdnBaseUrl + "/" + path;
    }
    
    public void uploadToCDN(String path, byte[] content) {
        // Загрузка контента в CDN
        // Реализация зависит от выбранного CDN провайдера
    }
    
    public void invalidateCDNCache(String path) {
        // Инвалидация кэша CDN
        // Реализация зависит от выбранного CDN провайдера
    }
}