// 重试机制示例
public class RetryMechanism {
private static final int MAX_RETRIES = 3;
private static final long RETRY_DELAY = 1000; // 1秒
public static void executeWithRetry(Runnable task) {
int attempt = 0;
while (attempt < MAX_RETRIES) {
try {
task.run();
return; // 成功执行，退出循环
} catch (Exception e) {
attempt++;
if (attempt >= MAX_RETRIES) {
throw new RuntimeException("Failed after " + MAX_RETRIES + " attempts", e);
}
try {
Thread.sleep(RETRY_DELAY);
} catch (InterruptedException ie) {
Thread.currentThread().interrupt();
}
}
}
}
// Nginx 负载均衡配置示例
http {
upstream backend {
least_conn;
server backend1.example.com;
server backend2.example.com;
server backend3.example.com;
}
server {
listen 80;
location / {
proxy_pass http://backend;
proxy_set_header Host $host;
proxy_set_header X-Real-IP $remote_addr;
}
}
// 客户端超时设置示例（Java）
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.time.Duration;
public class ClientTimeoutExample {
public static void main(String[] args) throws Exception {
HttpClient client = HttpClient.newBuilder()
.connectTimeout(Duration.ofSeconds(10)) // 设置连接超时时间为10秒
.build();
HttpRequest request = HttpRequest.newBuilder()
.uri(URI.create("http://example.com"))
.timeout(Duration.ofSeconds(30)) // 设置请求超时时间为30秒
.build();
HttpResponse response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());
}
// HikariCP 数据库连接池配置示例
import com.zaxxer.hikari.HikariConfig;
import com.zaxxer.hikari.HikariDataSource;
public class HikariCPConfigExample {
public static void main(String[] args) {
HikariConfig config = new HikariConfig();
config.setJdbcUrl("jdbc:mysql://localhost:3306/mydb");
config.setUsername("user");
config.setPassword("password");
config.setMaximumPoolSize(20); // 最大连接数
config.setMinimumIdle(5); // 最小空闲连接数
config.setIdleTimeout(30000); // 空闲连接超时时间（毫秒）
config.setConnectionTimeout(30000); // 连接超时时间（毫秒）
HikariDataSource ds = new HikariDataSource(config);
// 使用数据源...
}
// Redis 缓存示例（Java）
import redis.clients.jedis.Jedis;
public class RedisCacheExample {
public static void main(String[] args) {
Jedis jedis = new Jedis("localhost", 6379);
jedis.set("key", "value");
String value = jedis.get("key");
System.out.println(value); // 输出: value
jedis.close();
}
}
// Hystrix 断路器示例（Java）
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
import org.springframework.stereotype.Service;
@Service
public class HystrixExampleService {
@HystrixCommand(fallbackMethod = "fallbackMethod")
public String getData() {
// 模拟获取数据的操作
return "Data from service";
}
public String fallbackMethod() {
return "Fallback data";
}