自定义注解基于redis实现频控限流、分布式id、分布式锁

自定义注解基于Redis实现频控限流、分布式ID和分布式锁的示例代码如下：

频控限流注解定义：

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface RateLimiter {
    // 时间窗口大小
    int timeWindow() default 10;
    // 允许的最大访问次数
    int maxCount() default 20;
}

频控限流的处理：

public class RateLimiterInterceptor implements MethodInterceptor {
    private String getKey(Method method, Object[] args) {
        // 生成key
    }
 
    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        Method method = invocation.getMethod();
        RateLimiter rateLimiter = method.getAnnotation(RateLimiter.class);
        if (rateLimiter != null) {
            String key = getKey(method, invocation.getArguments());
            // 使用Redis进行频控限流逻辑
            // 比如：检查Redis中key的计数器是否超过maxCount，或者增加计数器
        }
        return invocation.proceed();
    }
}

分布式ID生成：

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface DistributedId {
    // 业务前缀
    String prefix() default "";
}

分布式ID处理：

public class DistributedIdInterceptor implements MethodInterceptor {
    private String getKey(Method method, Object[] args) {
        // 生成key
    }
 
    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        Method method = invocation.getMethod();
        DistributedId distributedId = method.getAnnotation(DistributedId.class);
        if (distributedId != null) {
            String key = getKey(method, invocation.getArguments());
            // 使用Redis进行分布式ID生成逻辑
            // 比如：通过INCR命令或者Lua脚本原子性地生成唯一ID
        }
        return invocation.proceed();
    }
}

分布式锁实现：

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface DistributedLock {
    // 锁的有效时间
    int timeout() default 10;
}

分布式锁处理：

public class DistributedLockInterceptor implements MethodInterceptor {
    private String getKey(Method method, Object[] args) {
        // 生成key
    }
 
    @Override
    public Object invoke(MethodInvocation invocation) throws Throwable {
        Method method = invocation.getMethod();
        DistributedLock distributedLock = method.getAnnotation(DistributedLock.class);
        if (distributedLock != null) {
            String key = getKey(method, invocation.getArgum