{"id":107616,"date":"2026-09-19T22:16:47","date_gmt":"2026-09-19T14:16:47","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/107616.html"},"modified":"2026-09-19T22:16:47","modified_gmt":"2026-09-19T14:16:47","slug":"%e6%96%ad%e8%b7%af%e5%99%a8%e6%a8%a1%e5%bc%8f-circuit-breaker-%e5%ae%9e%e6%88%98%ef%bc%9a%e4%bf%9d%e6%8a%a4%e5%90%8e%e7%ab%af%e6%9c%8d%e5%8a%a1%e5%85%8d%e5%8f%97%e7%ba%a7%e8%81%94%e6%95%85%e9%9a%9c","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/107616.html","title":{"rendered":"\u65ad\u8def\u5668\u6a21\u5f0f Circuit Breaker \u5b9e\u6218\uff1a\u4fdd\u62a4\u540e\u7aef\u670d\u52a1\u514d\u53d7\u7ea7\u8054\u6545\u969c\u96ea\u5d29"},"content":{"rendered":"<h2>\u65ad\u8def\u5668\u6a21\u5f0f Circuit Breaker \u5b9e\u6218&#xff1a;\u4fdd\u62a4\u540e\u7aef\u670d\u52a1\u514d\u53d7\u7ea7\u8054\u6545\u969c\u96ea\u5d29<\/h2>\n<p><img decoding=\"async\" src=\"https:\/\/www.wsisp.com\/helps\/wp-content\/uploads\/2026\/09\/20260919141645-6aae994db294f.webp\" alt=\"\u5c01\u9762\u4fe1\u606f\u56fe\" \/><\/p>\n<p>\u5728\u7cfb\u7edf\u7ea7\u7f51\u7edc\u5206\u6790\u5de5\u5177\u4e2d&#xff0c;AI \u8bca\u65ad\u6a21\u5757\u901a\u5e38\u4f9d\u8d56\u5916\u90e8\u7684\u5927\u8bed\u8a00\u6a21\u578b\u4e91\u7aef API&#xff08;\u5982 DeepSeek\u3001OpenAI\u3001Claude&#xff09;\u3002<\/p>\n<p>\u5728\u6076\u52a3\u7684\u7f51\u7edc\u73af\u5883\u4e0b&#xff0c;\u5982\u679c\u4e91\u7aef\u670d\u52a1\u5546\u53d1\u751f\u4e86\u5927\u89c4\u6a21\u673a\u623f\u6545\u969c\u6216\u7f51\u7edc\u5149\u7f06\u4e2d\u65ad&#xff1a;<\/p>\n<ul>\n<li>\u6bcf\u4e00\u4e2a\u53d1\u8d77\u7684 HTTP \u8bf7\u6c42\u90fd\u4f1a\u5728\u7b49\u5f85 3~5 \u79d2\u8d85\u65f6\u540e\u624d\u5931\u8d25&#xff1b;<\/li>\n<li>\u6b64\u65f6\u5982\u679c\u672c\u5730\u7f51\u7edc\u6301\u7eed\u6d8c\u5165\u5f02\u5e38\u6d41\u91cf&#xff0c;\u6bcf\u79d2\u4e0a\u767e\u4e2a\u5f02\u6b65\u4efb\u52a1\u4f1a\u540c\u65f6\u5361\u5728\u7b49\u5f85\u8d85\u65f6\u7684\u963b\u585e\u72b6\u6001\u4e2d&#xff1b;<\/li>\n<li>\u5f88\u5feb&#xff0c;\u672c\u5730\u7684 Tokio \u4efb\u52a1\u69fd\u4f4d\u3001\u5957\u63a5\u5b57\u6587\u4ef6\u63cf\u8ff0\u7b26&#xff08;FD&#xff09;\u548c\u5185\u5b58\u4f1a\u88ab\u8fd9\u51e0\u767e\u4e2a\u6302\u8d77\u7684\u8d85\u65f6\u4efb\u52a1\u5f7b\u5e95\u8017\u5c3d&#xff0c;\u5bfc\u81f4\u672c\u5730\u539f\u672c\u5065\u5eb7\u7684\u6293\u5305\u548c\u534f\u8bae\u5206\u6790\u5f15\u64ce\u4e5f\u4e00\u540c\u88ab\u62d6\u57ae\u762b\u75ea&#xff01;<\/li>\n<\/ul>\n<p>\u8fd9\u79cd\u56e0\u4e0b\u6e38\u4f9d\u8d56\u6545\u969c\u5f15\u53d1\u4e0a\u6e38\u5168\u7cfb\u7edf\u5d29\u6e83\u7684\u73b0\u8c61&#xff0c;\u88ab\u79f0\u4e3a\u7ea7\u8054\u6545\u969c\u96ea\u5d29&#xff08;Cascading Failures&#xff09;\u3002<\/p>\n<p>\u5728\u5206\u5e03\u5f0f\u7cfb\u7edf\u9ad8\u53ef\u7528\u67b6\u6784\u4e2d&#xff0c;\u65ad\u8def\u5668\u6a21\u5f0f&#xff08;Circuit Breaker Pattern&#xff0c;\u7ecf\u5178\u4e09\u6001\u72b6\u6001\u673a&#xff09; \u662f\u963b\u65ad\u96ea\u5d29\u3001\u5b9e\u73b0\u79d2\u7ea7\u6545\u969c\u81ea\u6108\u7684\u6700\u5f3a\u62a4\u57ce\u6cb3\u3002<\/p>\n<p>\u4eca\u5929\u8fd9\u7bc7\u6587\u7ae0&#xff0c;\u6211\u4eec\u5728 packet-ai \u6a21\u5757\u4e2d\u4ece\u96f6\u5b9e\u73b0\u4e00\u4e2a\u5de5\u4e1a\u7ea7\u7684\u5f02\u6b65\u65ad\u8def\u5668\u3002<\/p>\n<hr \/>\n<h4>1. \u65ad\u8def\u5668\u4e09\u5927\u6838\u5fc3\u72b6\u6001\u4e0e\u6d41\u8f6c\u6a21\u578b<\/h4>\n<p>       [ \u6b63\u5e38\u72b6\u6001: \u5173\u95ed (Closed) ]<br \/>\n             \u2502<br \/>\n             \u2502 (\u8fde\u7eed\u5931\u8d25\u8fbe\u5230\u9608\u503c&#xff0c;\u5982 5 \u6b21\u8d85\u65f6)<br \/>\n             \u25bc<br \/>\n       [ \u7194\u65ad\u72b6\u6001: \u5f00\u542f (Open) ] \u2500\u2500\u25ba \u77ac\u95f4\u62d2\u7edd\u6240\u6709\u5916\u90e8\u8bf7\u6c42 (Fail-Fast&#xff0c;\u8017\u65f6 0ms!)<br \/>\n             \u2502<br \/>\n             \u2502 (\u8fdb\u5165\u51b7\u5374\u4f11\u7720\u671f&#xff0c;\u5982\u51b7\u5374 30 \u79d2)<br \/>\n             \u25bc<br \/>\n       [ \u63a2\u6d4b\u72b6\u6001: \u534a\u5f00\u542f (Half-Open) ]<br \/>\n             \u2502<br \/>\n             \u251c\u2500\u2500 \u5141\u8bb8\u653e\u884c 1 \u4e2a\u63a2\u6d4b\u8bf7\u6c42\u6d4b\u8bd5\u4e0b\u6e38<br \/>\n             \u2502     \u251c\u2500\u2500 \u6d4b\u8bd5\u6210\u529f \u2500\u2500\u25ba \u81ea\u52a8\u81ea\u6108&#xff01;\u6062\u590d\u81f3 [Closed] \u72b6\u6001<br \/>\n             \u2502     \u2514\u2500\u2500 \u6d4b\u8bd5\u5931\u8d25 \u2500\u2500\u25ba \u518d\u6b21\u8df3\u95f8&#xff01;\u91cd\u65b0\u8fdb\u5165 [Open] \u7194\u65ad\u72b6\u6001<\/p>\n<hr \/>\n<h4>2. \u7f16\u5199\u5f3a\u7c7b\u578b\u5f02\u6b65\u65ad\u8def\u5668 CircuitBreaker<\/h4>\n<p>\u5728 crates\/packet-ai\/src\/circuit_breaker.rs \u4e2d&#xff1a;<\/p>\n<p>\/\/ crates\/packet-ai\/src\/circuit_breaker.rs<br \/>\nuse parking_lot::Mutex;<br \/>\nuse std::future::Future;<br \/>\nuse std::sync::Arc;<br \/>\nuse std::time::{Duration, Instant};<\/p>\n<p>#[derive(Debug, Clone, Copy, PartialEq, Eq)]<br \/>\npub enum BreakerState {<br \/>\n    Closed,   \/\/ \u6b63\u5e38\u653e\u884c<br \/>\n    Open,     \/\/ \u7194\u65ad\u8df3\u95f8<br \/>\n    HalfOpen, \/\/ \u63a2\u6d4b\u6062\u590d<br \/>\n}<\/p>\n<p>struct InnerState {<br \/>\n    state: BreakerState,<br \/>\n    consecutive_failures: usize,<br \/>\n    last_state_change: Instant,<br \/>\n}<\/p>\n<p>#[derive(Clone)]<br \/>\npub struct CircuitBreaker {<br \/>\n    failure_threshold: usize,<br \/>\n    cooldown_duration: Duration,<br \/>\n    inner: Arc&lt;Mutex&lt;InnerState&gt;&gt;,<br \/>\n}<\/p>\n<p>impl CircuitBreaker {<br \/>\n    pub fn new(failure_threshold: usize, cooldown_duration: Duration) -&gt; Self {<br \/>\n        Self {<br \/>\n            failure_threshold,<br \/>\n            cooldown_duration,<br \/>\n            inner: Arc::new(Mutex::new(InnerState {<br \/>\n                state: BreakerState::Closed,<br \/>\n                consecutive_failures: 0,<br \/>\n                last_state_change: Instant::now(),<br \/>\n            })),<br \/>\n        }<br \/>\n    }<\/p>\n<p>    \/\/\/ \u5305\u88c5\u4e00\u4e2a\u53d7\u65ad\u8def\u5668\u4fdd\u62a4\u7684\u5f02\u6b65\u8c03\u7528<br \/>\n    pub async fn call&lt;T, E, F, Fut&gt;(&amp;self, operation: F) -&gt; Result&lt;T, BreakerError&lt;E&gt;&gt;<br \/>\n    where<br \/>\n        F: FnOnce() -&gt; Fut,<br \/>\n        Fut: Future&lt;Output &#061; Result&lt;T, E&gt;&gt;,<br \/>\n    {<br \/>\n        \/\/ 1. \u68c0\u67e5\u5f53\u524d\u65ad\u8def\u5668\u72b6\u6001<br \/>\n        {<br \/>\n            let mut guard &#061; self.inner.lock();<br \/>\n            match guard.state {<br \/>\n                BreakerState::Open &#061;&gt; {<br \/>\n                    if guard.last_state_change.elapsed() &gt;&#061; self.cooldown_duration {<br \/>\n                        log::info!(&#034; \u65ad\u8def\u5668\u51b7\u5374\u65f6\u95f4\u5df2\u8fc7&#xff0c;\u72b6\u6001\u8fc1\u79fb\u4e3a [HalfOpen] \u63a2\u6d4b\u6a21\u5f0f&#8230;&#034;);<br \/>\n                        guard.state &#061; BreakerState::HalfOpen;<br \/>\n                        guard.last_state_change &#061; Instant::now();<br \/>\n                    } else {<br \/>\n                        \/\/ \u5904\u4e8e\u7194\u65ad\u671f&#xff0c;\u77ac\u95f4\u62d2\u7edd&#xff01;(\u96f6\u8017\u65f6 Fail-Fast)<br \/>\n                        return Err(BreakerError::CircuitOpen);<br \/>\n                    }<br \/>\n                }<br \/>\n                BreakerState::HalfOpen | BreakerState::Closed &#061;&gt; {}<br \/>\n            }<br \/>\n        }<\/p>\n<p>        \/\/ 2. \u6267\u884c\u53d7\u4fdd\u62a4\u7684\u5f02\u6b65\u8bf7\u6c42<br \/>\n        match operation().await {<br \/>\n            Ok(val) &#061;&gt; {<br \/>\n                \/\/ \u8bf7\u6c42\u6210\u529f&#xff0c;\u91cd\u7f6e\u72b6\u6001<br \/>\n                let mut guard &#061; self.inner.lock();<br \/>\n                if guard.state !&#061; BreakerState::Closed {<br \/>\n                    log::info!(&#034; \u4e0b\u6e38\u670d\u52a1\u5df2\u6062\u590d&#xff01;\u65ad\u8def\u5668\u81ea\u52a8\u81ea\u6108&#xff0c;\u91cd\u7f6e\u4e3a [Closed] \u72b6\u6001\u3002&#034;);<br \/>\n                }<br \/>\n                guard.state &#061; BreakerState::Closed;<br \/>\n                guard.consecutive_failures &#061; 0;<br \/>\n                guard.last_state_change &#061; Instant::now();<br \/>\n                Ok(val)<br \/>\n            }<br \/>\n            Err(err) &#061;&gt; {<br \/>\n                \/\/ \u8bf7\u6c42\u5931\u8d25&#xff0c;\u8bb0\u5f55\u5931\u8d25\u6b21\u6570<br \/>\n                let mut guard &#061; self.inner.lock();<br \/>\n                guard.consecutive_failures &#043;&#061; 1;<\/p>\n<p>                if guard.state &#061;&#061; BreakerState::HalfOpen || guard.consecutive_failures &gt;&#061; self.failure_threshold {<br \/>\n                    log::warn!(<br \/>\n                        &#034;\u26a0 \u8fde\u7eed\u5931\u8d25\u6b21\u6570\u8fbe\u5230\u9608\u503c ({})&#xff0c;\u65ad\u8def\u5668\u89e6\u53d1\u8df3\u95f8&#xff01;\u72b6\u6001\u8fc1\u79fb\u4e3a [Open] \u7194\u65ad\u6a21\u5f0f&#xff01;&#034;,<br \/>\n                        guard.consecutive_failures<br \/>\n                    );<br \/>\n                    guard.state &#061; BreakerState::Open;<br \/>\n                    guard.last_state_change &#061; Instant::now();<br \/>\n                }<\/p>\n<p>                Err(BreakerError::Inner(err))<br \/>\n            }<br \/>\n        }<br \/>\n    }<br \/>\n}<\/p>\n<p>#[derive(Debug)]<br \/>\npub enum BreakerError&lt;E&gt; {<br \/>\n    CircuitOpen, \/\/ \u7194\u65ad\u963b\u65ad<br \/>\n    Inner(E),    \/\/ \u4e1a\u52a1\u9519\u8bef<br \/>\n}<\/p>\n<hr \/>\n<h4>3. \u5728\u6293\u5305\u5206\u6790\u5668\u8bca\u65ad\u7f51\u5173\u4e2d\u96c6\u6210\u7194\u65ad\u9632\u62a4<\/h4>\n<p>\u5728 crates\/packet-ai\/src\/gateway.rs \u4e2d&#xff1a;<\/p>\n<p>\/\/ crates\/packet-ai\/src\/gateway.rs<br \/>\nuse crate::circuit_breaker::{BreakerError, CircuitBreaker};<br \/>\nuse std::time::Duration;<\/p>\n<p>pub struct ResilientAiGateway {<br \/>\n    breaker: CircuitBreaker,<br \/>\n}<\/p>\n<p>impl ResilientAiGateway {<br \/>\n    pub fn new() -&gt; Self {<br \/>\n        Self {<br \/>\n            \/\/ \u914d\u7f6e&#xff1a;\u8fde\u7eed\u5931\u8d25 3 \u6b21\u5373\u89e6\u53d1\u8df3\u95f8&#xff0c;\u51b7\u5374\u671f\u4e3a 15 \u79d2<br \/>\n            breaker: CircuitBreaker::new(3, Duration::from_secs(15)),<br \/>\n        }<br \/>\n    }<\/p>\n<p>    pub async fn request_diagnosis_safe(&amp;self, prompt: &amp;str) -&gt; Result&lt;String, String&gt; {<br \/>\n        let result &#061; self.breaker.call(|| async {<br \/>\n            \/\/ \u771f\u5b9e\u7684\u4e91\u7aef\u6d41\u5f0f\u8c03\u7528<br \/>\n            packet_ai::call_cloud_ai(prompt).await<br \/>\n        }).await;<\/p>\n<p>        match result {<br \/>\n            Ok(text) &#061;&gt; Ok(text),<br \/>\n            Err(BreakerError::CircuitOpen) &#061;&gt; {<br \/>\n                \/\/ \u77ac\u95f4\u5feb\u901f\u964d\u7ea7\u4e3a\u672c\u5730\u89c4\u5219\u5e93\u63d0\u793a&#xff0c;\u5b8c\u5168\u4e0d\u53d1\u7f51\u7edc\u8bf7\u6c42&#xff01;<br \/>\n                Ok(&#034;[\u7194\u65ad\u964d\u7ea7\u63d0\u793a] \u4e91\u7aef AI \u670d\u52a1\u5f02\u5e38&#xff0c;\u5df2\u81ea\u52a8\u5207\u6362\u4e3a\u672c\u5730\u79bb\u7ebf\u89c4\u5219\u6392\u969c\u5efa\u8bae\u3002&#034;.to_string())<br \/>\n            }<br \/>\n            Err(BreakerError::Inner(e)) &#061;&gt; Err(format!(&#034;\u8bca\u65ad\u8c03\u7528\u62a5\u9519: {:?}&#034;, e)),<br \/>\n        }<br \/>\n    }<br \/>\n}<\/p>\n<hr \/>\n<h4>4. \u6a21\u62df\u4e0b\u6e38\u673a\u623f\u6545\u969c\u7194\u65ad\u5b9e\u6d4b<\/h4>\n<p>\u5728\u5355\u5143\u6d4b\u8bd5\u4e2d&#xff0c;\u6211\u4eec\u6a21\u62df\u4e91\u7aef API \u8fde\u7eed\u8fd4\u56de\u8d85\u65f6&#xff1a;<\/p>\n<p>&#061;&#061;&#061; \u65ad\u8def\u5668\u9632\u96ea\u5d29\u7194\u65ad\u6d4b\u8bd5 &#061;&#061;&#061;<br \/>\n[Req 1] \u8c03\u7528\u5931\u8d25 (\u8017\u65f6 3000ms \u8d85\u65f6) -&gt; \u5931\u8d25\u8ba1\u6570: 1<br \/>\n[Req 2] \u8c03\u7528\u5931\u8d25 (\u8017\u65f6 3000ms \u8d85\u65f6) -&gt; \u5931\u8d25\u8ba1\u6570: 2<br \/>\n[Req 3] \u8c03\u7528\u5931\u8d25 (\u8017\u65f6 3000ms \u8d85\u65f6) -&gt; \u5931\u8d25\u8ba1\u6570: 3 -&gt; \u89e6\u53d1\u8df3\u95f8&#xff01;\u72b6\u6001\u8fc1\u79fb\u4e3a [Open]!<\/p>\n<p>[Req 4] \u77ac\u95f4\u8fd4\u56de&#xff01;\u8017\u65f6 0.001ms -&gt; \u547d\u4e2d\u7194\u65ad\u4fdd\u62a4&#xff0c;\u79d2\u7ea7\u8f93\u51fa\u672c\u5730\u79bb\u7ebf\u964d\u7ea7\u5efa\u8bae&#xff01;<br \/>\n[Req 5] \u77ac\u95f4\u8fd4\u56de&#xff01;\u8017\u65f6 0.001ms -&gt; 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