{"id":106913,"date":"2026-09-18T16:00:37","date_gmt":"2026-09-18T08:00:37","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/106913.html"},"modified":"2026-09-18T16:00:37","modified_gmt":"2026-09-18T08:00:37","slug":"springcloud-alibaba-sentinel-%e6%95%99%e5%ad%a6%ef%bc%9a%e9%99%90%e6%b5%81%e3%80%81%e7%86%94%e6%96%ad%e3%80%81%e9%99%8d%e7%ba%a7%e3%80%81%e7%ba%bf%e7%a8%8b-%e4%bf%a1%e5%8f%b7%e9%87%8f%e9%9a%94","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/106913.html","title":{"rendered":"SpringCloud Alibaba Sentinel \u6559\u5b66\uff1a\u9650\u6d41\u3001\u7194\u65ad\u3001\u964d\u7ea7\u3001\u7ebf\u7a0b\/\u4fe1\u53f7\u91cf\u9694\u79bb\u3001\u6d3b\u52a8\u8fc7\u8f7d\u4fdd\u62a4"},"content":{"rendered":"<h3>\u524d\u8a00<\/h3>\n<p>\u5728\u5fae\u670d\u52a1\u4f53\u7cfb\u4e2d&#xff0c;\u670d\u52a1\u8c03\u7528\u94fe\u9519\u7efc\u590d\u6742&#xff0c;\u4e00\u4e2a\u4e0b\u6e38\u670d\u52a1\u5361\u987f\u3001\u8d85\u65f6\u3001\u6d41\u91cf\u66b4\u6da8&#xff0c;\u5c31\u4f1a\u5411\u4e0a\u4f20\u5bfc&#xff0c;\u5f15\u53d1\u7ea7\u8054\u96ea\u5d29\u3002Sentinel \u662f\u963f\u91cc\u5f00\u6e90\u7684\u6d41\u91cf\u9632\u62a4\u7ec4\u4ef6&#xff0c;\u6838\u5fc3\u80fd\u529b&#xff1a;\u9650\u6d41\u3001\u7194\u65ad\u964d\u7ea7\u3001\u7ebf\u7a0b\u9694\u79bb\u3001\u7cfb\u7edf\u81ea\u9002\u5e94\u4fdd\u62a4\u3001\u70ed\u70b9\u53c2\u6570\u9632\u62a4\u3002<\/p>\n<p>\u672c\u6587\u7ed3\u5408\u771f\u5b9e\u4e1a\u52a1\u6848\u4f8b&#xff1a;\u5927\u4fc3\u9886\u5238\u6d3b\u52a8&#xff0c;\u8fc7\u8f7d\u65f6\u5173\u95ed\u9886\u5238\u5199\u63a5\u53e3&#xff0c;\u4f46\u4fdd\u7559\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u53ef\u7528&#xff0c;\u5b8c\u6574\u8bb2\u89e3Sentinel\u6838\u5fc3\u6982\u5ff5\u3001\u4e24\u79cd\u9694\u79bb\u6a21\u5f0f\u3001\u89c4\u5219\u914d\u7f6e\u3001\u4ee3\u7801\u793a\u4f8b\u3001\u539f\u7406\u56fe\u3001\u8e29\u5751\u603b\u7ed3\u3001\u5bf9\u6bd4\u8868\u683c&#xff0c;\u6587\u672b\u9644\u5e26\u590d\u76d8\u603b\u7ed3\u4e0e\u9762\u8bd5\u601d\u8003\u9898\u3002<\/p>\n<p>\u6838\u5fc3\u76ee\u6807&#xff1a;\u4fdd\u62a4\u81ea\u8eab\u670d\u52a1&#xff0c;\u4e5f\u4fdd\u62a4\u4e0b\u6e38\u4f9d\u8d56&#xff0c;\u6545\u969c\u4e0d\u6269\u6563&#xff0c;\u505a\u5230\u90e8\u5206\u529f\u80fd\u964d\u7ea7&#xff0c;\u6838\u5fc3\u94fe\u8def\u53ef\u7528\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e00\u90e8\u5206&#xff1a;Sentinel \u57fa\u7840\u6982\u5ff5<\/h3>\n<h4>1.1 \u4ec0\u4e48\u662fSentinel<\/h4>\n<p>Sentinel \u9762\u5411\u5206\u5e03\u5f0f\u5fae\u670d\u52a1\u7684\u6d41\u91cf\u63a7\u5236\u9632\u62a4\u7ec4\u4ef6\u3002\u6838\u5fc3\u5de5\u4f5c\u6a21\u5f0f&#xff1a;\u8d44\u6e90\u57cb\u70b9 \u2192 \u8bbe\u7f6e\u89c4\u5219 \u2192 \u8fd0\u884c\u65f6\u7edf\u8ba1QPS\u3001\u7ebf\u7a0b\u6570\u3001\u54cd\u5e94\u65f6\u95f4\u3001\u5f02\u5e38\u6bd4\u4f8b \u2192 \u89e6\u53d1\u89c4\u5219\u6267\u884c\u9632\u62a4\u52a8\u4f5c\u3002<\/p>\n<ul>\n<li>\u8d44\u6e90Resource&#xff1a;\u9700\u8981\u4fdd\u62a4\u7684\u5bf9\u8c61&#xff0c;\u53ef\u4ee5\u662f\u63a5\u53e3\u3001\u65b9\u6cd5\u3001\u4ee3\u7801\u5757&#xff1b;\u901a\u8fc7\u6ce8\u89e3&#064;SentinelResource\u6216\u8005API\u57cb\u70b9\u5b9a\u4e49\u3002<\/li>\n<li>\u89c4\u5219Rule&#xff1a;\u6d41\u63a7\u89c4\u5219\u3001\u7194\u65ad\u964d\u7ea7\u89c4\u5219\u3001\u7cfb\u7edf\u89c4\u5219\u3001\u70ed\u70b9\u53c2\u6570\u89c4\u5219\u3002<\/li>\n<li>Slot\u8d23\u4efb\u94fe&#xff1a;Sentinel\u5e95\u5c42Slot\u94fe\u4f9d\u6b21\u6267\u884c\u7edf\u8ba1\u3001\u6d41\u63a7\u3001\u7194\u65ad\u3001\u9694\u79bb\u7b49\u903b\u8f91\u3002<\/li>\n<li>BlockException&#xff1a;\u88ab\u9650\u6d41\/\u9694\u79bb\u89e6\u53d1\u629b\u51fa\u7684\u57fa\u7840\u5f02\u5e38&#xff1b;\u4e1a\u52a1\u6355\u83b7\u8be5\u5f02\u5e38\u505a\u964d\u7ea7\u515c\u5e95\u903b\u8f91\u3002<\/li>\n<\/ul>\n<p>\u548cHystrix\u5bf9\u6bd4&#xff1a;Hystrix\u4e3b\u8981\u4ee5\u7ebf\u7a0b\u6c60\u9694\u79bb\u4e3a\u4e3b&#xff1b;Sentinel\u652f\u6301\u4fe1\u53f7\u91cf\u9694\u79bb&#xff0c;\u4e5f\u652f\u6301\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u540c\u65f6\u63d0\u4f9b\u4e30\u5bcc\u9650\u6d41\u80fd\u529b&#xff0c;Hystrix\u5df2\u7ecf\u505c\u6b62\u7ef4\u62a4&#xff0c;\u5fae\u670d\u52a1\u4e3b\u6d41\u9009\u578bSentinel\u3002<\/p>\n<h4>1.2 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circle,#mermaid-svg-BTxSC63A7w0kovEi .node ellipse,#mermaid-svg-BTxSC63A7w0kovEi .node polygon,#mermaid-svg-BTxSC63A7w0kovEi .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-BTxSC63A7w0kovEi .rough-node .label text,#mermaid-svg-BTxSC63A7w0kovEi .node .label text,#mermaid-svg-BTxSC63A7w0kovEi .image-shape .label,#mermaid-svg-BTxSC63A7w0kovEi .icon-shape .label{text-anchor:middle;}#mermaid-svg-BTxSC63A7w0kovEi .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-BTxSC63A7w0kovEi .rough-node .label,#mermaid-svg-BTxSC63A7w0kovEi .node .label,#mermaid-svg-BTxSC63A7w0kovEi .image-shape .label,#mermaid-svg-BTxSC63A7w0kovEi .icon-shape .label{text-align:center;}#mermaid-svg-BTxSC63A7w0kovEi .node.clickable{cursor:pointer;}#mermaid-svg-BTxSC63A7w0kovEi .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-BTxSC63A7w0kovEi .arrowheadPath{fill:#333333;}#mermaid-svg-BTxSC63A7w0kovEi .edgePath 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#aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-BTxSC63A7w0kovEi .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-BTxSC63A7w0kovEi rect.text{fill:none;stroke-width:0;}#mermaid-svg-BTxSC63A7w0kovEi .icon-shape,#mermaid-svg-BTxSC63A7w0kovEi .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-BTxSC63A7w0kovEi .icon-shape p,#mermaid-svg-BTxSC63A7w0kovEi .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-BTxSC63A7w0kovEi .icon-shape .label rect,#mermaid-svg-BTxSC63A7w0kovEi .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-BTxSC63A7w0kovEi .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-BTxSC63A7w0kovEi .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-BTxSC63A7w0kovEi :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7f51\u5173<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6d3b\u52a8\u9886\u5238\u670d\u52a1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u5e93\u5b58\u670d\u52a1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7528\u6237\u4fe1\u606f\u670d\u52a1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u5e93\u5b58\u670d\u52a1\u6162\/\u5361\u987f\u5927\u91cf\u8bf7\u6c42\u5806\u79ef<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8bf7\u6c42\u5806\u79ef&#xff0c;\u7ebf\u7a0b\u8017\u5c3d<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u65b0\u8bf7\u6c42\u5168\u90e8\u963b\u585e<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u9886\u5238\u670d\u52a1\u7ebf\u7a0b\u6253\u6ee1\u8fde\u5e26\u5238\u67e5\u8be2\u63a5\u53e3\u4e5f\u4e0d\u53ef\u7528<\/p>\n<p><\/span><\/p>\n<p>\u73b0\u8c61&#xff1a;\u4e0b\u6e38\u670d\u52a1\u54cd\u5e94\u53d8\u6162&#xff0c;\u4e0a\u6e38\u5927\u91cf\u8bf7\u6c42\u5806\u79ef&#xff0c;\u7ebf\u7a0b\u8017\u5c3d&#xff0c;\u6574\u4e2a\u670d\u52a1\u6240\u6709\u63a5\u53e3\u5361\u6b7b&#xff0c;\u54ea\u6015\u548c\u6545\u969c\u4e0b\u6e38\u65e0\u5173\u7684\u63a5\u53e3\u4e5f\u65e0\u6cd5\u54cd\u5e94&#xff0c;\u8fd9\u5c31\u662f\u670d\u52a1\u96ea\u5d29\u3002<br \/>\n\u9632\u62a4\u624b\u6bb5&#xff1a;\u9650\u6d41\u3001\u7194\u65ad\u964d\u7ea7\u3001\u7ebf\u7a0b\/\u4fe1\u53f7\u91cf\u9694\u79bb\u3002<\/p>\n<h4>1.3 \u5feb\u901f\u5f15\u5165\u4f9d\u8d56&#xff08;Maven&#xff09;<\/h4>\n<p><span class=\"token comment\">&lt;!&#8211; sentinel spring cloud alibaba starter &#8211;&gt;<\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>com.alibaba.cloud<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>groupId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n    <span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span>spring-cloud-starter-alibaba-sentinel<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>artifactId<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><br \/>\n<span class=\"token tag\"><span class=\"token tag\"><span class=\"token punctuation\">&lt;\/<\/span>dependency<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><\/p>\n<p>\u7b80\u5355\u8d44\u6e90\u57cb\u70b9\u793a\u4f8b&#xff0c;\u6ce8\u89e3\u65b9\u5f0f&#xff1a;<\/p>\n<p><span class=\"token comment\">\/**<br \/>\n * value: \u8d44\u6e90\u540d\u79f0<br \/>\n * blockHandler: \u9650\u6d41\/\u9694\u79bb\u89e6\u53d1\u7684\u515c\u5e95\u51fd\u6570<br \/>\n * fallback: \u4e1a\u52a1\u5f02\u5e38\u7684\u964d\u7ea7\u51fd\u6570<br \/>\n *\/<\/span><br \/>\n<span class=\"token annotation punctuation\">&#064;SentinelResource<\/span><span class=\"token punctuation\">(<\/span>value <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;receiveCoupon&#034;<\/span><span class=\"token punctuation\">,<\/span> blockHandler <span class=\"token operator\">&#061;<\/span> <span class=\"token string\">&#034;receiveCouponBlockHandler&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">receiveCoupon<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Long<\/span> activityId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Long<\/span> userId<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token comment\">\/\/ \u9886\u5238\u4e1a\u52a1\u903b\u8f91<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;\u9886\u5238\u6210\u529f&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p><span class=\"token comment\">\/\/ blockHandler \u515c\u5e95&#xff0c;\u5165\u53c2\u5fc5\u987b\u5e26\u4e0aBlockException<\/span><br \/>\n<span class=\"token keyword\">public<\/span> <span class=\"token class-name\">String<\/span> <span class=\"token function\">receiveCouponBlockHandler<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Long<\/span> activityId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">Long<\/span> userId<span class=\"token punctuation\">,<\/span> <span class=\"token class-name\">BlockException<\/span> ex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    log<span class=\"token punctuation\">.<\/span><span class=\"token function\">warn<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;\u9886\u5238\u63a5\u53e3\u88ab\u6d41\u91cf\u9632\u62a4\u62e6\u622a&#034;<\/span><span class=\"token punctuation\">,<\/span> ex<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token keyword\">return<\/span> <span class=\"token string\">&#034;\u6d3b\u52a8\u8bbf\u95ee\u8fc7\u4e8e\u706b\u7206&#xff0c;\u8bf7\u7a0d\u540e\u91cd\u8bd5&#034;<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<p>\u26a0\ufe0f\u5751\u70b9&#xff1a;&#064;SentinelResource\u6ce8\u89e3\u53ea\u5bf9public\u65b9\u6cd5\u751f\u6548&#xff0c;\u540c\u7c7b\u5185\u90e8\u8c03\u7528\u6ce8\u89e3\u4e0d\u751f\u6548&#xff0c;\u4e0d\u4f1a\u8d70Sentinel\u9632\u62a4\u903b\u8f91\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e8c\u90e8\u5206&#xff1a;\u6d41\u91cf\u9650\u6d41&#xff08;FlowRule&#xff09;<\/h3>\n<h2>2.1 \u9650\u6d41\u6838\u5fc3\u6982\u5ff5<\/h2>\n<p>\u9650\u6d41&#xff1a;\u9650\u5236\u8d44\u6e90\u7684\u8bbf\u95ee\u901f\u7387&#xff0c;\u9632\u6b62\u8bf7\u6c42\u91cf\u8d85\u8fc7\u670d\u52a1\u5904\u7406\u80fd\u529b\u3002Sentinel\u6d41\u63a7\u89c4\u5219FlowRule\u3002<\/p>\n<p>\u6d41\u63a7\u6a21\u5f0f&#xff1a;<\/p>\n<li>\u76f4\u63a5&#xff1a;\u5bf9\u5f53\u524d\u8d44\u6e90\u672c\u8eab\u9650\u6d41&#xff1b;<\/li>\n<li>\u5173\u8054&#xff1a;\u5173\u8054\u5176\u4ed6\u8d44\u6e90&#xff0c;\u5173\u8054\u8d44\u6e90\u8fbe\u5230\u9608\u503c&#xff0c;\u9650\u6d41\u672c\u8d44\u6e90&#xff1b;\u5178\u578b\u573a\u666f&#xff1a;\u5199\u64cd\u4f5c\u8fc7\u8f7d&#xff0c;\u9650\u5236\u67e5\u8be2&#xff1b;<\/li>\n<li>\u94fe\u8def&#xff1a;\u53ea\u8bb0\u5f55\u6307\u5b9a\u8c03\u7528\u94fe\u8def\u4e0a\u7684\u6d41\u91cf&#xff0c;\u53ea\u5bf9\u6307\u5b9a\u5165\u53e3\u9650\u6d41\u3002<\/li>\n<p>#mermaid-svg-IonKIXmdK5N1MuZC{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-IonKIXmdK5N1MuZC .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-IonKIXmdK5N1MuZC .error-icon{fill:#552222;}#mermaid-svg-IonKIXmdK5N1MuZC .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-IonKIXmdK5N1MuZC .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-IonKIXmdK5N1MuZC .marker{fill:#333333;stroke:#333333;}#mermaid-svg-IonKIXmdK5N1MuZC .marker.cross{stroke:#333333;}#mermaid-svg-IonKIXmdK5N1MuZC svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-IonKIXmdK5N1MuZC p{margin:0;}#mermaid-svg-IonKIXmdK5N1MuZC .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#mermaid-svg-IonKIXmdK5N1MuZC .cluster-label text{fill:#333;}#mermaid-svg-IonKIXmdK5N1MuZC .cluster-label span{color:#333;}#mermaid-svg-IonKIXmdK5N1MuZC .cluster-label span p{background-color:transparent;}#mermaid-svg-IonKIXmdK5N1MuZC .label text,#mermaid-svg-IonKIXmdK5N1MuZC span{fill:#333;color:#333;}#mermaid-svg-IonKIXmdK5N1MuZC .node rect,#mermaid-svg-IonKIXmdK5N1MuZC .node circle,#mermaid-svg-IonKIXmdK5N1MuZC .node ellipse,#mermaid-svg-IonKIXmdK5N1MuZC .node polygon,#mermaid-svg-IonKIXmdK5N1MuZC .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-IonKIXmdK5N1MuZC .rough-node .label text,#mermaid-svg-IonKIXmdK5N1MuZC .node .label text,#mermaid-svg-IonKIXmdK5N1MuZC .image-shape .label,#mermaid-svg-IonKIXmdK5N1MuZC .icon-shape .label{text-anchor:middle;}#mermaid-svg-IonKIXmdK5N1MuZC .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-IonKIXmdK5N1MuZC .rough-node .label,#mermaid-svg-IonKIXmdK5N1MuZC .node .label,#mermaid-svg-IonKIXmdK5N1MuZC .image-shape .label,#mermaid-svg-IonKIXmdK5N1MuZC .icon-shape .label{text-align:center;}#mermaid-svg-IonKIXmdK5N1MuZC .node.clickable{cursor:pointer;}#mermaid-svg-IonKIXmdK5N1MuZC .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-IonKIXmdK5N1MuZC .arrowheadPath{fill:#333333;}#mermaid-svg-IonKIXmdK5N1MuZC .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-IonKIXmdK5N1MuZC .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-IonKIXmdK5N1MuZC .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-IonKIXmdK5N1MuZC .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-IonKIXmdK5N1MuZC .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-IonKIXmdK5N1MuZC .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-IonKIXmdK5N1MuZC .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-IonKIXmdK5N1MuZC .cluster text{fill:#333;}#mermaid-svg-IonKIXmdK5N1MuZC .cluster span{color:#333;}#mermaid-svg-IonKIXmdK5N1MuZC div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-IonKIXmdK5N1MuZC .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-IonKIXmdK5N1MuZC rect.text{fill:none;stroke-width:0;}#mermaid-svg-IonKIXmdK5N1MuZC .icon-shape,#mermaid-svg-IonKIXmdK5N1MuZC .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-IonKIXmdK5N1MuZC .icon-shape p,#mermaid-svg-IonKIXmdK5N1MuZC .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-IonKIXmdK5N1MuZC .icon-shape .label rect,#mermaid-svg-IonKIXmdK5N1MuZC .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-IonKIXmdK5N1MuZC .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-IonKIXmdK5N1MuZC .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-IonKIXmdK5N1MuZC :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"nodeLabel\"><\/p>\n<p>\u6d41\u63a7\u6a21\u5f0f<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u76f4\u63a5\u9650\u6d41<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8d44\u6e90R\u81ea\u8eabQPS\u8fbe\u5230\u9608\u503c\u62e6\u622aR\u7684\u8bf7\u6c42<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5173\u8054\u9650\u6d41<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u76d1\u63a7\u5173\u8054\u8d44\u6e90R_writeR_write\u6d41\u91cf\u8d85\u9650 \u2192 \u62e6\u622aR_read<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6848\u4f8b&#xff1a;\u9886\u5238\u5199\u6d41\u91cf\u66b4\u589e&#xff0c;\u9650\u5236\u67e5\u8be2\u63a5\u53e3<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u94fe\u8def\u9650\u6d41<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8d44\u6e90R\u53ef\u4ece\u591a\u4e2a\u5165\u53e3\u8c03\u7528\u53ea\u7edf\u8ba1\u5165\u53e3Entrance1\u7684\u6d41\u91cf&#xff0c;Entrance2\u4e0d\u7edf\u8ba1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7528\u6237<\/p>\n<p><\/span><\/p>\n<p>\u6d41\u63a7\u6548\u679c&#xff1a;<\/p>\n<ul>\n<li>\u5feb\u901f\u5931\u8d25&#xff1a;\u8fbe\u5230\u9608\u503c\u76f4\u63a5\u629b\u51faBlockException&#xff1b;<\/li>\n<li>Warm Up&#xff08;\u9884\u70ed&#xff09;&#xff1a;\u51b7\u542f\u52a8&#xff0c;\u9608\u503c\u7f13\u6162\u4e0a\u5347&#xff0c;\u5e94\u5bf9\u7cfb\u7edf\u521a\u542f\u52a8JIT\u672a\u9884\u70ed&#xff1b;<\/li>\n<li>\u6392\u961f\u7b49\u5f85&#xff1a;\u6f0f\u6876\u6a21\u5f0f&#xff0c;\u5300\u901f\u5904\u7406\u8bf7\u6c42&#xff0c;\u5141\u8bb8\u8bf7\u6c42\u6392\u961f&#xff0c;\u8bbe\u7f6e\u6700\u5927\u7b49\u5f85\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p>#mermaid-svg-wZWW4movyUF5BZLe{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes 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.edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-wZWW4movyUF5BZLe .marker{fill:#333333;stroke:#333333;}#mermaid-svg-wZWW4movyUF5BZLe .marker.cross{stroke:#333333;}#mermaid-svg-wZWW4movyUF5BZLe svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-wZWW4movyUF5BZLe p{margin:0;}#mermaid-svg-wZWW4movyUF5BZLe .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#mermaid-svg-wZWW4movyUF5BZLe .cluster-label text{fill:#333;}#mermaid-svg-wZWW4movyUF5BZLe .cluster-label span{color:#333;}#mermaid-svg-wZWW4movyUF5BZLe .cluster-label span p{background-color:transparent;}#mermaid-svg-wZWW4movyUF5BZLe .label text,#mermaid-svg-wZWW4movyUF5BZLe span{fill:#333;color:#333;}#mermaid-svg-wZWW4movyUF5BZLe .node rect,#mermaid-svg-wZWW4movyUF5BZLe .node circle,#mermaid-svg-wZWW4movyUF5BZLe .node ellipse,#mermaid-svg-wZWW4movyUF5BZLe .node polygon,#mermaid-svg-wZWW4movyUF5BZLe .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-wZWW4movyUF5BZLe .rough-node .label text,#mermaid-svg-wZWW4movyUF5BZLe .node .label text,#mermaid-svg-wZWW4movyUF5BZLe .image-shape .label,#mermaid-svg-wZWW4movyUF5BZLe .icon-shape .label{text-anchor:middle;}#mermaid-svg-wZWW4movyUF5BZLe .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-wZWW4movyUF5BZLe .rough-node .label,#mermaid-svg-wZWW4movyUF5BZLe .node .label,#mermaid-svg-wZWW4movyUF5BZLe .image-shape .label,#mermaid-svg-wZWW4movyUF5BZLe .icon-shape .label{text-align:center;}#mermaid-svg-wZWW4movyUF5BZLe .node.clickable{cursor:pointer;}#mermaid-svg-wZWW4movyUF5BZLe .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-wZWW4movyUF5BZLe .arrowheadPath{fill:#333333;}#mermaid-svg-wZWW4movyUF5BZLe .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-wZWW4movyUF5BZLe .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-wZWW4movyUF5BZLe .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-wZWW4movyUF5BZLe .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-wZWW4movyUF5BZLe .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-wZWW4movyUF5BZLe .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-wZWW4movyUF5BZLe .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-wZWW4movyUF5BZLe .cluster text{fill:#333;}#mermaid-svg-wZWW4movyUF5BZLe .cluster span{color:#333;}#mermaid-svg-wZWW4movyUF5BZLe div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-wZWW4movyUF5BZLe .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-wZWW4movyUF5BZLe rect.text{fill:none;stroke-width:0;}#mermaid-svg-wZWW4movyUF5BZLe .icon-shape,#mermaid-svg-wZWW4movyUF5BZLe .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-wZWW4movyUF5BZLe .icon-shape p,#mermaid-svg-wZWW4movyUF5BZLe .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-wZWW4movyUF5BZLe .icon-shape .label rect,#mermaid-svg-wZWW4movyUF5BZLe .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-wZWW4movyUF5BZLe .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-wZWW4movyUF5BZLe .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-wZWW4movyUF5BZLe :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"nodeLabel\"><\/p>\n<p>\u6d41\u63a7\u6548\u679c<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5feb\u901f\u5931\u8d25<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>QPS\u8d85\u9650 \u2192 \u7acb\u523b\u62d2\u7edd&#xff0c;\u629b\u51faBlockException<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>Warm Up\u9884\u70ed<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u542f\u52a8\u521d\u671f\u9608\u503c\u4f4e&#xff0c;\u9010\u6b65\u63d0\u5347\u81f3\u8bbe\u5b9a\u9608\u503c\u907f\u514d\u51b7\u542f\u52a8\u6d41\u91cf\u6253\u57ae\u670d\u52a1<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6392\u961f\u7b49\u5f85-\u6f0f\u6876<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u8bf7\u6c42\u8fdb\u5165\u961f\u5217&#xff0c;\u5300\u901f\u653e\u884c\u8d85\u51fa\u6700\u5927\u7b49\u5f85\u65f6\u95f4\u76f4\u63a5\u62d2\u7edd<\/p>\n<p><\/span><\/p>\n<table>\n<tr>\u6d41\u63a7\u5c5e\u6027\u8bf4\u660e\u751f\u4ea7\u5b9e\u8df5<\/tr>\n<tbody>\n<tr>\n<td>resource<\/td>\n<td>\u53d7\u4fdd\u62a4\u8d44\u6e90\u540d<\/td>\n<td>\u548c&#064;SentinelResourcevalue\u4fdd\u6301\u4e00\u81f4<\/td>\n<\/tr>\n<tr>\n<td>count<\/td>\n<td>\u9608\u503c<\/td>\n<td>QPS\u9608\u503c&#xff0c;\u6bcf\u79d2\u5141\u8bb8\u8bf7\u6c42\u6570<\/td>\n<\/tr>\n<tr>\n<td>grade<\/td>\n<td>\u9608\u503c\u7c7b\u578b&#xff1a;0\u7ebf\u7a0b\u6570&#xff0c;1 QPS<\/td>\n<td>\u7edd\u5927\u591a\u6570\u573a\u666f\u4f7f\u7528QPS(1)<\/td>\n<\/tr>\n<tr>\n<td>strategy<\/td>\n<td>\u6d41\u63a7\u6a21\u5f0f&#xff1a;\u76f4\u63a5\/\u5173\u8054\/\u94fe\u8def<\/td>\n<td>\u5927\u4fc3\u5199\u8fc7\u8f7d\u4fdd\u62a4\u8bfb\u4f7f\u7528\u5173\u8054\u6a21\u5f0f<\/td>\n<\/tr>\n<tr>\n<td>controlBehavior<\/td>\n<td>\u6d41\u63a7\u6548\u679c&#xff1a;\u5feb\u901f\u5931\u8d25\/warmup\/\u6392\u961f<\/td>\n<td>\u63a5\u53e3\u666e\u901a\u9650\u6d41\u7528\u5feb\u901f\u5931\u8d25&#xff1b;\u5f02\u6b65\u6d88\u606f\u53ef\u7528\u6392\u961f\u7b49\u5f85<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Java\u4ee3\u7801\u5b9a\u4e49\u6d41\u63a7\u89c4\u5219\u793a\u4f8b&#xff08;\u4e5f\u53ef\u4ee5\u5728Sentinel\u63a7\u5236\u53f0\u914d\u7f6e\u6301\u4e45\u5316\u5230Nacos&#xff09;<\/p>\n<p><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">initFlowRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">FlowRule<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> rules <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">FlowRule<\/span> rule <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">FlowRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setResource<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;receiveCoupon&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setGrade<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RuleConstant<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">FLOW_GRADE_QPS<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ QPS\u9650\u5236200<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setControlBehavior<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RuleConstant<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">CONTROL_BEHAVIOR_DEFAULT<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rules<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>rule<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">FlowRuleManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">loadRules<\/span><span class=\"token punctuation\">(<\/span>rules<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2.2 \u4e1a\u52a1\u6848\u4f8b&#xff1a;\u5927\u4fc3\u6d3b\u52a8\u8fc7\u8f7d&#xff1a;\u5173\u95ed\u9886\u5238&#xff08;\u5199&#xff09;&#xff0c;\u4fdd\u7559\u5238\u67e5\u8be2&#xff08;\u8bfb&#xff09;<\/h4>\n<p>\u4e1a\u52a1\u9700\u6c42&#xff1a;\u6d3b\u52a8\u6d41\u91cf\u6d2a\u5cf0&#xff0c;\u9886\u5238\u5199\u63a5\u53e3\u8fc7\u8f7d&#xff0c;\u76f4\u63a5\u9650\u5236\u9886\u5238&#xff0c;\u4f46\u662f\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u5fc5\u987b\u6b63\u5e38\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<p>\u65b9\u6848&#xff1a;\u4f7f\u7528\u5173\u8054\u6d41\u63a7\u6a21\u5f0f<\/p>\n<ul>\n<li>\u8d44\u6e90A&#xff1a;receiveCoupon \u9886\u5238\u5199\u63a5\u53e3<\/li>\n<li>\u8d44\u6e90B&#xff1a;queryCoupon \u5238\u67e5\u8be2\u8bfb\u63a5\u53e3<\/li>\n<li>\u8bbe\u7f6e\u6d41\u63a7\u89c4\u5219&#xff1a;\u5bf9queryCoupon\u8bbe\u7f6e\u5173\u8054\u8d44\u6e90\u4e3areceiveCoupon\u3002<br \/>\n\u542b\u4e49&#xff1a;\u5f53receiveCoupon\u9886\u5238\u7684QPS\u8d85\u8fc7\u9608\u503c&#xff0c;\u89e6\u53d1\u9650\u6d41&#xff0c;\u9650\u5236\u9886\u5238&#xff1b;\u67e5\u8be2\u63a5\u53e3\u672c\u8eab\u4e0d\u53d7\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<p>#mermaid-svg-vrMEVAUNPs0LHDv1{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-vrMEVAUNPs0LHDv1 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-vrMEVAUNPs0LHDv1 .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-vrMEVAUNPs0LHDv1 .error-icon{fill:#552222;}#mermaid-svg-vrMEVAUNPs0LHDv1 .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-vrMEVAUNPs0LHDv1 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p{background-color:transparent;}#mermaid-svg-vrMEVAUNPs0LHDv1 .label text,#mermaid-svg-vrMEVAUNPs0LHDv1 span{fill:#333;color:#333;}#mermaid-svg-vrMEVAUNPs0LHDv1 .node rect,#mermaid-svg-vrMEVAUNPs0LHDv1 .node circle,#mermaid-svg-vrMEVAUNPs0LHDv1 .node ellipse,#mermaid-svg-vrMEVAUNPs0LHDv1 .node polygon,#mermaid-svg-vrMEVAUNPs0LHDv1 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-vrMEVAUNPs0LHDv1 .rough-node .label text,#mermaid-svg-vrMEVAUNPs0LHDv1 .node .label text,#mermaid-svg-vrMEVAUNPs0LHDv1 .image-shape .label,#mermaid-svg-vrMEVAUNPs0LHDv1 .icon-shape .label{text-anchor:middle;}#mermaid-svg-vrMEVAUNPs0LHDv1 .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-vrMEVAUNPs0LHDv1 .rough-node .label,#mermaid-svg-vrMEVAUNPs0LHDv1 .node .label,#mermaid-svg-vrMEVAUNPs0LHDv1 .image-shape .label,#mermaid-svg-vrMEVAUNPs0LHDv1 .icon-shape .label{text-align:center;}#mermaid-svg-vrMEVAUNPs0LHDv1 .node.clickable{cursor:pointer;}#mermaid-svg-vrMEVAUNPs0LHDv1 .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-vrMEVAUNPs0LHDv1 .arrowheadPath{fill:#333333;}#mermaid-svg-vrMEVAUNPs0LHDv1 .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-vrMEVAUNPs0LHDv1 .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-vrMEVAUNPs0LHDv1 .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-vrMEVAUNPs0LHDv1 .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-vrMEVAUNPs0LHDv1 .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-vrMEVAUNPs0LHDv1 .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-vrMEVAUNPs0LHDv1 .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-vrMEVAUNPs0LHDv1 .cluster text{fill:#333;}#mermaid-svg-vrMEVAUNPs0LHDv1 .cluster span{color:#333;}#mermaid-svg-vrMEVAUNPs0LHDv1 div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-vrMEVAUNPs0LHDv1 .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-vrMEVAUNPs0LHDv1 rect.text{fill:none;stroke-width:0;}#mermaid-svg-vrMEVAUNPs0LHDv1 .icon-shape,#mermaid-svg-vrMEVAUNPs0LHDv1 .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-vrMEVAUNPs0LHDv1 .icon-shape p,#mermaid-svg-vrMEVAUNPs0LHDv1 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-vrMEVAUNPs0LHDv1 .icon-shape .label rect,#mermaid-svg-vrMEVAUNPs0LHDv1 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-vrMEVAUNPs0LHDv1 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-vrMEVAUNPs0LHDv1 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-vrMEVAUNPs0LHDv1 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"nodeLabel\"><\/p>\n<p>\u5927\u4fc3\u6d3b\u52a8\u670d\u52a1<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/p>\n<p>QPS \u8d85\u8fc7 300 \u89e6\u53d1\u9608\u503c<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u62e6\u622a\u5199\u8bf7\u6c42<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u9886\u5238 receiveCoupon \u5199\u8d44\u6e90<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u67e5\u8be2 queryCoupon \u8bfb\u8d44\u6e90<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6d41\u63a7\u89c4\u5219\u8d44\u6e90:queryCoupon\u6a21\u5f0f:\u5173\u8054\u5173\u8054\u8d44\u6e90:receiveCoupon\u9608\u503cQPS&#061;300<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7528\u6237<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u67e5\u8be2\u8bfb\u63a5\u53e3\u4e0d\u53d7\u5f71\u54cd&#xff0c;\u6b63\u5e38\u8fd4\u56de<\/p>\n<p><\/span><\/p>\n<p>\u6ce8\u610f&#xff1a;\u5173\u8054\u6d41\u63a7&#xff1a;\u9608\u503c\u662f\u5173\u8054\u8d44\u6e90\u7684\u6307\u6807&#xff0c;\u9650\u6d41\u4f5c\u7528\u5728\u5f53\u524d\u914d\u7f6e\u7684\u8d44\u6e90\u4e0a\u3002\u4e0d\u8981\u641e\u53cd\u914d\u7f6e\u5bf9\u8c61\u3002<\/p>\n<p>Java\u4ee3\u7801\u5b9a\u4e49\u6d41\u63a7\u89c4\u5219\u793a\u4f8b&#xff08;\u4e5f\u53ef\u4ee5\u5728Sentinel\u63a7\u5236\u53f0\u914d\u7f6e\u6301\u4e45\u5316\u5230Nacos&#xff09;<\/p>\n<p><span class=\"token keyword\">private<\/span> <span class=\"token keyword\">void<\/span> <span class=\"token function\">initFlowRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">{<\/span><br \/>\n    <span class=\"token class-name\">List<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token class-name\">FlowRule<\/span><span class=\"token punctuation\">&gt;<\/span><\/span> rules <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayList<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">FlowRule<\/span> rule <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">FlowRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setResource<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;receiveCoupon&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setGrade<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RuleConstant<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">FLOW_GRADE_QPS<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">200<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span> <span class=\"token comment\">\/\/ QPS\u9650\u5236200<\/span><br \/>\n    rule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setControlBehavior<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RuleConstant<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">CONTROL_BEHAVIOR_DEFAULT<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    rules<span class=\"token punctuation\">.<\/span><span class=\"token function\">add<\/span><span class=\"token punctuation\">(<\/span>rule<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n    <span class=\"token class-name\">FlowRuleManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">loadRules<\/span><span class=\"token punctuation\">(<\/span>rules<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token punctuation\">}<\/span><\/p>\n<h4>2.2 \u4e1a\u52a1\u6848\u4f8b&#xff1a;\u5927\u4fc3\u6d3b\u52a8\u8fc7\u8f7d&#xff1a;\u5173\u95ed\u9886\u5238&#xff08;\u5199&#xff09;&#xff0c;\u4fdd\u7559\u5238\u67e5\u8be2&#xff08;\u8bfb&#xff09;<\/h4>\n<p>\u4e1a\u52a1\u9700\u6c42&#xff1a;\u6d3b\u52a8\u6d41\u91cf\u6d2a\u5cf0&#xff0c;\u9886\u5238\u5199\u63a5\u53e3\u8fc7\u8f7d&#xff0c;\u76f4\u63a5\u9650\u5236\u9886\u5238&#xff0c;\u4f46\u662f\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u5fc5\u987b\u6b63\u5e38\u5bf9\u5916\u63d0\u4f9b\u670d\u52a1\u3002<\/p>\n<p>\u65b9\u6848&#xff1a;\u4f7f\u7528\u5173\u8054\u6d41\u63a7\u6a21\u5f0f<\/p>\n<ul>\n<li>\u8d44\u6e90A&#xff1a;receiveCoupon \u9886\u5238\u5199\u63a5\u53e3<\/li>\n<li>\u8d44\u6e90B&#xff1a;queryCoupon \u5238\u67e5\u8be2\u8bfb\u63a5\u53e3<\/li>\n<li>\u8bbe\u7f6e\u6d41\u63a7\u89c4\u5219&#xff1a;\u5bf9queryCoupon\u8bbe\u7f6e\u5173\u8054\u8d44\u6e90\u4e3areceiveCoupon\u3002<br \/>\n\u542b\u4e49&#xff1a;\u5f53receiveCoupon\u9886\u5238\u7684QPS\u8d85\u8fc7\u9608\u503c&#xff0c;\u89e6\u53d1\u9650\u6d41&#xff0c;\u9650\u5236\u9886\u5238&#xff1b;\u67e5\u8be2\u63a5\u53e3\u672c\u8eab\u4e0d\u53d7\u5f71\u54cd\u3002<\/li>\n<\/ul>\n<p>#mermaid-svg-f6DXgEMY2jXgcBwm{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear infinite;stroke-linecap:round;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-animation-fast{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 20s linear infinite;stroke-linecap:round;}#mermaid-svg-f6DXgEMY2jXgcBwm .error-icon{fill:#552222;}#mermaid-svg-f6DXgEMY2jXgcBwm .error-text{fill:#552222;stroke:#552222;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-thickness-normal{stroke-width:1px;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-thickness-thick{stroke-width:3.5px;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-pattern-solid{stroke-dasharray:0;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-thickness-invisible{stroke-width:0;fill:none;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-pattern-dashed{stroke-dasharray:3;}#mermaid-svg-f6DXgEMY2jXgcBwm .edge-pattern-dotted{stroke-dasharray:2;}#mermaid-svg-f6DXgEMY2jXgcBwm .marker{fill:#333333;stroke:#333333;}#mermaid-svg-f6DXgEMY2jXgcBwm .marker.cross{stroke:#333333;}#mermaid-svg-f6DXgEMY2jXgcBwm svg{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-f6DXgEMY2jXgcBwm p{margin:0;}#mermaid-svg-f6DXgEMY2jXgcBwm .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster-label text{fill:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster-label span{color:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster-label span p{background-color:transparent;}#mermaid-svg-f6DXgEMY2jXgcBwm .label text,#mermaid-svg-f6DXgEMY2jXgcBwm span{fill:#333;color:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm .node rect,#mermaid-svg-f6DXgEMY2jXgcBwm .node circle,#mermaid-svg-f6DXgEMY2jXgcBwm .node ellipse,#mermaid-svg-f6DXgEMY2jXgcBwm .node polygon,#mermaid-svg-f6DXgEMY2jXgcBwm .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-f6DXgEMY2jXgcBwm .rough-node .label text,#mermaid-svg-f6DXgEMY2jXgcBwm .node .label text,#mermaid-svg-f6DXgEMY2jXgcBwm .image-shape .label,#mermaid-svg-f6DXgEMY2jXgcBwm .icon-shape .label{text-anchor:middle;}#mermaid-svg-f6DXgEMY2jXgcBwm .node .katex path{fill:#000;stroke:#000;stroke-width:1px;}#mermaid-svg-f6DXgEMY2jXgcBwm .rough-node .label,#mermaid-svg-f6DXgEMY2jXgcBwm .node .label,#mermaid-svg-f6DXgEMY2jXgcBwm .image-shape .label,#mermaid-svg-f6DXgEMY2jXgcBwm .icon-shape .label{text-align:center;}#mermaid-svg-f6DXgEMY2jXgcBwm .node.clickable{cursor:pointer;}#mermaid-svg-f6DXgEMY2jXgcBwm .root .anchor path{fill:#333333!important;stroke-width:0;stroke:#333333;}#mermaid-svg-f6DXgEMY2jXgcBwm .arrowheadPath{fill:#333333;}#mermaid-svg-f6DXgEMY2jXgcBwm .edgePath .path{stroke:#333333;stroke-width:2.0px;}#mermaid-svg-f6DXgEMY2jXgcBwm .flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-f6DXgEMY2jXgcBwm .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-f6DXgEMY2jXgcBwm .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-f6DXgEMY2jXgcBwm .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-f6DXgEMY2jXgcBwm .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster text{fill:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm .cluster span{color:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-f6DXgEMY2jXgcBwm .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-f6DXgEMY2jXgcBwm rect.text{fill:none;stroke-width:0;}#mermaid-svg-f6DXgEMY2jXgcBwm .icon-shape,#mermaid-svg-f6DXgEMY2jXgcBwm .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-f6DXgEMY2jXgcBwm .icon-shape p,#mermaid-svg-f6DXgEMY2jXgcBwm .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-f6DXgEMY2jXgcBwm .icon-shape .label rect,#mermaid-svg-f6DXgEMY2jXgcBwm .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-f6DXgEMY2jXgcBwm .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-f6DXgEMY2jXgcBwm .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-f6DXgEMY2jXgcBwm :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"nodeLabel\"><\/p>\n<p>\u5927\u4fc3\u6d3b\u52a8\u670d\u52a1<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/p>\n<p>QPS \u8d85\u8fc7 300 \u89e6\u53d1\u9608\u503c<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u62e6\u622a\u5199\u8bf7\u6c42<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u9886\u5238 receiveCoupon \u5199\u8d44\u6e90<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u67e5\u8be2 queryCoupon \u8bfb\u8d44\u6e90<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6d41\u63a7\u89c4\u5219\u8d44\u6e90:queryCoupon\u6a21\u5f0f:\u5173\u8054\u5173\u8054\u8d44\u6e90:receiveCoupon\u9608\u503cQPS&#061;300<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>User<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u67e5\u8be2\u8bfb\u63a5\u53e3\u4e0d\u53d7\u5f71\u54cd&#xff0c;\u6b63\u5e38\u8fd4\u56de<\/p>\n<p><\/span><\/p>\n<p>\u6ce8\u610f&#xff1a;\u5173\u8054\u6d41\u63a7&#xff1a;\u9608\u503c\u662f\u5173\u8054\u8d44\u6e90\u7684\u6307\u6807&#xff0c;\u9650\u6d41\u4f5c\u7528\u5728\u5f53\u524d\u914d\u7f6e\u7684\u8d44\u6e90\u4e0a\u3002\u4e0d\u8981\u641e\u53cd\u914d\u7f6e\u5bf9\u8c61\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e09\u90e8\u5206&#xff1a;\u7194\u65ad\u964d\u7ea7 DegradeRule<\/h3>\n<h4>3.1 \u7194\u65ad\u964d\u7ea7\u662f\u4ec0\u4e48<\/h4>\n<p>\u9650\u6d41\u89e3\u51b3\u6d41\u91cf\u8fc7\u5927&#xff1b;\u7194\u65ad\u964d\u7ea7\u89e3\u51b3\u4e0b\u6e38\u4f9d\u8d56\u4e0d\u7a33\u5b9a\u3001\u6162\u8c03\u7528\u95ee\u9898\u3002<br 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rect.outer{rx:5px;ry:5px;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-state .divider{stroke:#9370DB;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-state .title-state{rx:5px;ry:5px;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-cluster.statediagram-cluster .inner{fill:white;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-cluster.statediagram-cluster-alt .inner{fill:#f0f0f0;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-cluster .inner{rx:0;ry:0;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-state rect.basic{rx:5px;ry:5px;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-state rect.divider{stroke-dasharray:10,10;fill:#f0f0f0;}#mermaid-svg-fF9V8t1FfBCatvkJ .note-edge{stroke-dasharray:5;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-note rect{fill:#fff5ad;stroke:#aaaa33;stroke-width:1px;rx:0;ry:0;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-note rect{fill:#fff5ad;stroke:#aaaa33;stroke-width:1px;rx:0;ry:0;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-note text{fill:black;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram-note .nodeLabel{color:black;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagram .edgeLabel{color:red;}#mermaid-svg-fF9V8t1FfBCatvkJ #dependencyStart,#mermaid-svg-fF9V8t1FfBCatvkJ #dependencyEnd{fill:#333333;stroke:#333333;stroke-width:1;}#mermaid-svg-fF9V8t1FfBCatvkJ .statediagramTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-fF9V8t1FfBCatvkJ :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"edgeLabel\"><\/p>\n<p>\u521d\u59cb\u5173\u95ed\u72b6\u6001&#xff0c;\u6b63\u5e38\u653e\u884c\u8bf7\u6c42<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u7edf\u8ba1\u7a97\u53e3\u5185\u8fbe\u5230\u7194\u65ad\u9608\u503c&#xff0c;\u6253\u5f00\u7194\u65ad<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u7194\u65ad\u65f6\u95f4\u7a97\u53e3\u7ed3\u675f&#xff0c;\u8fdb\u5165\u534a\u5f00<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u63a2\u6d4b\u8bf7\u6c42\u6210\u529f&#xff0c;\u5173\u95ed\u7194\u65ad\u5668\u6062\u590d<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u63a2\u6d4b\u8bf7\u6c42\u5931\u8d25&#xff0c;\u91cd\u65b0\u6253\u5f00\u7194\u65ad<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>CLOSED<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>OPEN<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>HALF_OPEN<\/p>\n<p><\/span><\/p>\n<ul>\n<li>CLOSED\u5173\u95ed&#xff1a;\u6b63\u5e38\u653e\u884c\u8bf7\u6c42&#xff0c;\u505a\u6307\u6807\u7edf\u8ba1&#xff1b;<\/li>\n<li>OPEN\u6253\u5f00&#xff1a;\u7194\u65ad\u5f00\u542f&#xff0c;\u6240\u6709\u8bf7\u6c42\u76f4\u63a5\u8d70\u964d\u7ea7&#xff0c;\u4e0d\u6267\u884c\u4e1a\u52a1\u8c03\u7528&#xff1b;<\/li>\n<li>HALF_OPEN\u534a\u5f00&#xff1a;\u65f6\u95f4\u7a97\u53e3\u5230\u671f&#xff0c;\u653e\u884c\u5c11\u91cf\u63a2\u6d4b\u8bf7\u6c42&#xff0c;\u63a2\u6d4b\u4e0b\u6e38\u662f\u5426\u6062\u590d\u3002<\/li>\n<\/ul>\n<p>DegradeRule\u5173\u952e\u53c2\u6570&#xff1a;<\/p>\n<li>resource&#xff1a;\u53d7\u4fdd\u62a4\u8d44\u6e90&#xff1b;<\/li>\n<li>grade&#xff1a;\u7194\u65ad\u7b56\u7565&#xff1b;<\/li>\n<li>count&#xff1a;\u9608\u503c&#xff08;\u6162\u8c03\u7528RT\u9608\u503c \/ \u5f02\u5e38\u6bd4\u4f8b \/ \u5f02\u5e38\u6570\u91cf&#xff09;&#xff1b;<\/li>\n<li>timeWindow&#xff1a;\u7194\u65ad\u6253\u5f00\u6301\u7eed\u65f6\u95f4&#xff08;\u79d2&#xff09;&#xff1b;<\/li>\n<li>minRequestAmount&#xff1a;\u6700\u5c0f\u8bf7\u6c42\u6570&#xff0c;\u4f4e\u4e8e\u8be5\u6570\u503c\u4e0d\u4f1a\u89e6\u53d1\u7194\u65ad&#xff1b;<\/li>\n<li>statIntervalMs&#xff1a;\u7edf\u8ba1\u65f6\u95f4\u7a97\u53e3&#xff0c;\u6beb\u79d2\u3002<\/li>\n<p>\u4ee3\u7801\u793a\u4f8b&#xff1a;\u6162\u8c03\u7528\u6bd4\u4f8b\u7194\u65ad<\/p>\n<p><span class=\"token class-name\">DegradeRule<\/span> degradeRule <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">DegradeRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;couponStockApi&#034;<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">setGrade<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">RuleConstant<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">DEGRADE_GRADE_SLOW_RATIO<\/span><span class=\"token punctuation\">)<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">setCount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">500<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/ RT\u5927\u4e8e500ms\u5224\u5b9a\u4e3a\u6162\u8c03\u7528<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">setTimeWindow<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/\u7194\u65ad\u7a97\u53e310\u79d2<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">setSlowRatioThreshold<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">0.6<\/span><span class=\"token punctuation\">)<\/span> <span class=\"token comment\">\/\/60%\u8bf7\u6c42\u6162\u8c03\u7528\u89e6\u53d1\u7194\u65ad<\/span><br \/>\n        <span class=\"token punctuation\">.<\/span><span class=\"token function\">setMinRequestAmount<\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">10<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>3.2 fallback \u4e0e blockHandler \u7684\u533a\u522b&#xff08;\u9ad8\u9891\u9762\u8bd5&#xff09;<\/h4>\n<table>\n<tr>\u5c5e\u6027blockHandlerfallback<\/tr>\n<tbody>\n<tr>\n<td>\u89e6\u53d1\u65f6\u673a<\/td>\n<td>\u9650\u6d41\u3001\u7194\u65ad\u3001\u9694\u79bb\u7b49Sentinel\u6d41\u91cf\u9632\u62a4\u629b\u51faBlockException<\/td>\n<td>\u4e1a\u52a1\u65b9\u6cd5\u672c\u8eab\u629b\u51fa\u4efb\u610f\u5f02\u5e38<\/td>\n<\/tr>\n<tr>\n<td>\u4f5c\u7528<\/td>\n<td>\u6d41\u91cf\u9632\u62a4\u62e6\u622a\u515c\u5e95<\/td>\n<td>\u4e1a\u52a1\u5f02\u5e38\u515c\u5e95\u8fd4\u56de\u964d\u7ea7\u7ed3\u679c<\/td>\n<\/tr>\n<tr>\n<td>\u5f02\u5e38\u5165\u53c2<\/td>\n<td>\u5fc5\u987b\u643a\u5e26BlockException<\/td>\n<td>\u4e0d\u9700\u8981<\/td>\n<\/tr>\n<tr>\n<td>\u5178\u578b\u573a\u666f<\/td>\n<td>\u8bbf\u95ee\u592a\u706b\u7206&#xff0c;\u8bf7\u7a0d\u540e\u91cd\u8bd5<\/td>\n<td>\u4e0b\u6e38\u51fa\u9519\u8fd4\u56de\u7f13\u5b58\u6570\u636e\u3001\u9ed8\u8ba4\u503c<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>\u6700\u4f73\u5b9e\u8df5&#xff1a;\u4e24\u4e2a\u540c\u65f6\u914d\u7f6e\u3002\u6d41\u91cf\u6253\u6ee1\u8d70blockHandler&#xff1b;\u4e1a\u52a1\u62a5\u9519\u8d70fallback\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u56db\u90e8\u5206&#xff1a;\u7ebf\u7a0b\u9694\u79bb &amp; \u4fe1\u53f7\u91cf\u9694\u79bb<\/h3>\n<h4>4.1 \u4e24\u79cd\u9694\u79bb\u6a21\u5f0f\u5bf9\u6bd4&#xff08;\u9762\u8bd5\u91cd\u4e2d\u4e4b\u91cd&#xff09;<\/h4>\n<p>\u9694\u79bb\u76ee\u7684&#xff1a;\u67d0\u4e2a\u4f9d\u8d56\u7684\u6162\u8c03\u7528&#xff0c;\u53ea\u8017\u5c3d\u5206\u914d\u7ed9\u5b83\u7684\u8d44\u6e90&#xff0c;\u4e0d\u80fd\u62d6\u57ae\u6574\u4e2a\u670d\u52a1\u5168\u90e8\u7ebf\u7a0b\u3002<br \/>\nSentinel \u9ed8\u8ba4\u662f\u4fe1\u53f7\u91cf\u9694\u79bb&#xff1b;Sentinel\u4e5f\u652f\u6301\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff08;\u7c7b\u4f3cHystrix&#xff09;\u3002<\/p>\n<p>\u26a0\ufe0fSentinel\u6ce8\u89e3\u9ed8\u8ba4\u4e0d\u662f\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff01;\u5f88\u591a\u5f00\u53d1\u8005\u8e29\u5751\u3002<\/p>\n<table>\n<tr>\u5bf9\u6bd4\u7ef4\u5ea6\u4fe1\u53f7\u91cf\u9694\u79bb(Sentinel\u9ed8\u8ba4)\u7ebf\u7a0b\u6c60\u9694\u79bb<\/tr>\n<tbody>\n<tr>\n<td>\u5e95\u5c42\u5b9e\u73b0<\/td>\n<td>\u5f53\u524d\u8c03\u7528\u7ebf\u7a0b\u6267\u884c&#xff0c;\u901a\u8fc7\u8ba1\u6570\u5668\u63a7\u5236\u5e76\u53d1\u6570<\/td>\n<td>\u72ec\u7acb\u4e1a\u52a1\u7ebf\u7a0b\u6c60\u6267\u884c\u4efb\u52a1<\/td>\n<\/tr>\n<tr>\n<td>\u7ebf\u7a0b\u6765\u6e90<\/td>\n<td>Tomcat\/Web\u5bb9\u5668\u7ebf\u7a0b<\/td>\n<td>\u81ea\u5b9a\u4e49\u9694\u79bb\u7ebf\u7a0b\u6c60<\/td>\n<\/tr>\n<tr>\n<td>\u8d85\u65f6\u63a7\u5236<\/td>\n<td>\u4e0d\u652f\u6301\u7ebf\u7a0b\u8d85\u65f6\u4e2d\u65ad<\/td>\n<td>\u652f\u6301\u7ebf\u7a0b\u6c60\u8d85\u65f6<\/td>\n<\/tr>\n<tr>\n<td>\u8d44\u6e90\u5f00\u9500<\/td>\n<td>\u8f7b\u91cf&#xff0c;\u65e0\u7ebf\u7a0b\u521b\u5efa\u5f00\u9500<\/td>\n<td>\u8f83\u91cd&#xff0c;\u6bcf\u4e2a\u8d44\u6e90\u521b\u5efa\u7ebf\u7a0b\u6c60<\/td>\n<\/tr>\n<tr>\n<td>\u4e0a\u4e0b\u6587\u4f20\u9012<\/td>\n<td>\u8bf7\u6c42\u4e0a\u4e0b\u6587\u53ef\u76f4\u63a5\u4f20\u9012<\/td>\n<td>\u9700\u8981\u624b\u52a8\u4f20\u9012\u4e0a\u4e0b\u6587(MDC\u3001\u8bf7\u6c42\u5934)<\/td>\n<\/tr>\n<tr>\n<td>\u9002\u7528\u573a\u666f<\/td>\n<td>\u5185\u90e8\u63a5\u53e3\u3001\u5185\u5b58\u8fd0\u7b97\u3001\u672c\u5730\u903b\u8f91&#xff1b;\u4e0d\u4f9d\u8d56\u8d85\u65f6\u4e2d\u65ad<\/td>\n<td>\u5916\u90e8RPC\u8c03\u7528\u3001\u7b2c\u4e09\u65b9HTTP\u8c03\u7528&#xff0c;\u9700\u8981\u8d85\u65f6\u9500\u6bc1\u963b\u585e\u7ebf\u7a0b<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>#mermaid-svg-97LM7t3uDvk75NwS{font-family:\\&#8221;trebuchet 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.flowchart-link{stroke:#333333;fill:none;}#mermaid-svg-97LM7t3uDvk75NwS .edgeLabel{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-97LM7t3uDvk75NwS .edgeLabel p{background-color:rgba(232,232,232, 0.8);}#mermaid-svg-97LM7t3uDvk75NwS .edgeLabel rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-97LM7t3uDvk75NwS .labelBkg{background-color:rgba(232, 232, 232, 0.5);}#mermaid-svg-97LM7t3uDvk75NwS .cluster rect{fill:#ffffde;stroke:#aaaa33;stroke-width:1px;}#mermaid-svg-97LM7t3uDvk75NwS .cluster text{fill:#333;}#mermaid-svg-97LM7t3uDvk75NwS .cluster span{color:#333;}#mermaid-svg-97LM7t3uDvk75NwS div.mermaidTooltip{position:absolute;text-align:center;max-width:200px;padding:2px;font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:12px;background:hsl(80, 100%, 96.2745098039%);border:1px solid #aaaa33;border-radius:2px;pointer-events:none;z-index:100;}#mermaid-svg-97LM7t3uDvk75NwS .flowchartTitleText{text-anchor:middle;font-size:18px;fill:#333;}#mermaid-svg-97LM7t3uDvk75NwS rect.text{fill:none;stroke-width:0;}#mermaid-svg-97LM7t3uDvk75NwS .icon-shape,#mermaid-svg-97LM7t3uDvk75NwS .image-shape{background-color:rgba(232,232,232, 0.8);text-align:center;}#mermaid-svg-97LM7t3uDvk75NwS .icon-shape p,#mermaid-svg-97LM7t3uDvk75NwS .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-97LM7t3uDvk75NwS .icon-shape .label rect,#mermaid-svg-97LM7t3uDvk75NwS .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-97LM7t3uDvk75NwS .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-97LM7t3uDvk75NwS .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-97LM7t3uDvk75NwS :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"nodeLabel\"><\/p>\n<p>\u7ebf\u7a0b\u6c60\u9694\u79bb<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u7ebf\u7a0b\u53ef\u7528<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u7ebf\u7a0b\u8017\u5c3d<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>Tomcat\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u72ec\u7acb\u9694\u79bb\u7ebf\u7a0b\u6c60<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6267\u884c\u4e1a\u52a1\u903b\u8f91\u9694\u79bb\u6c60\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u89e6\u53d1BlockException\u964d\u7ea7<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u652f\u6301\u4efb\u52a1\u8d85\u65f6\u7ec8\u6b62<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u4fe1\u53f7\u91cf\u9694\u79bb&#xff08;\u9ed8\u8ba4&#xff09;<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u8ba1\u6570\u5668\u672a\u8d85\u9650<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u8d85\u9650<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>Tomcat\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u4fe1\u53f7\u91cf\u8ba1\u6570\u5668<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6267\u884c\u4e1a\u52a1\u903b\u8f91\u4f7f\u7528Tomcat\u7ebf\u7a0b<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u89e6\u53d1BlockException\u964d\u7ea7<\/p>\n<p><\/span><\/p>\n<h4>4.2 \u4fe1\u53f7\u91cf\u9694\u79bb\u5751\u70b9<\/h4>\n<p>\u4fe1\u53f7\u91cf\u9694\u79bb\u4ec5\u4ec5\u9650\u5236\u5e76\u53d1\u8bf7\u6c42\u6570\u91cf&#xff0c;\u65e0\u6cd5\u4e2d\u65ad\u963b\u585e\u7ebf\u7a0b\u3002<br \/>\n\u5982\u679c\u4e0b\u6e38RPC\u5361\u6b7b\u4e0d\u8fd4\u56de&#xff0c;Tomcat\u7ebf\u7a0b\u4f1a\u4e00\u76f4\u963b\u585e&#xff0c;\u4fe1\u53f7\u91cf\u8ba1\u6570\u5668\u91ca\u653e\u4e0d\u4e86&#xff0c;\u65f6\u95f4\u4e45\u540eTomcat\u7ebf\u7a0b\u6c60\u4f9d\u7136\u4f1a\u88ab\u5360\u6ee1\u3002<\/p>\n<p>\u7ed3\u8bba&#xff1a;\u8c03\u7528\u5916\u90e8\u4e0d\u7a33\u5b9a\u7b2c\u4e09\u65b9\u670d\u52a1&#xff0c;\u4e0d\u8981\u5355\u7eaf\u4f9d\u8d56\u9ed8\u8ba4\u4fe1\u53f7\u91cf\u9694\u79bb&#xff1b;\u4f18\u5148\u4f7f\u7528\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u540c\u65f6\u5ba2\u6237\u7aef\u5fc5\u987b\u8bbe\u7f6e\u8d85\u65f6\u65f6\u95f4\u3002<\/p>\n<h4>4.3 Sentinel\u7ebf\u7a0b\u6c60\u9694\u79bb\u4ee3\u7801\u793a\u4f8b<\/h4>\n<p>\u9700\u8981\u624b\u52a8\u914d\u7f6eSentinelThreadPoolExecutor&#xff0c;\u4e3a\u8d44\u6e90\u5206\u914d\u72ec\u7acb\u7ebf\u7a0b\u6c60\u3002<\/p>\n<p><span class=\"token comment\">\/\/ \u4e3a\u5238\u5e93\u5b58RPC\u8d44\u6e90\u5206\u914d\u72ec\u7acb\u9694\u79bb\u7ebf\u7a0b\u6c60<\/span><br \/>\n<span class=\"token class-name\">ThreadPoolExecutor<\/span> pool <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">SentinelThreadPoolExecutor<\/span><span class=\"token punctuation\">(<\/span><br \/>\n        <span class=\"token number\">5<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token number\">10<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token number\">30<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token class-name\">TimeUnit<\/span><span class=\"token punctuation\">.<\/span><span class=\"token constant\">SECONDS<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ArrayBlockingQueue<\/span><span class=\"token generics\"><span class=\"token punctuation\">&lt;<\/span><span class=\"token punctuation\">&gt;<\/span><\/span><span class=\"token punctuation\">(<\/span><span class=\"token number\">20<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">NamedThreadFactory<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;sentinel-coupon-rpc-&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">,<\/span><br \/>\n        <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ThreadPoolExecutor<span class=\"token punctuation\">.<\/span>AbortPolicy<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><br \/>\n<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<p><span class=\"token comment\">\/\/ \u5b9a\u4e49\u7ebf\u7a0b\u6c60\u9694\u79bb\u89c4\u5219<\/span><br \/>\n<span class=\"token class-name\">ExecutorServiceRule<\/span> executorRule <span class=\"token operator\">&#061;<\/span> <span class=\"token keyword\">new<\/span> <span class=\"token class-name\">ExecutorServiceRule<\/span><span class=\"token punctuation\">(<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nexecutorRule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setResource<\/span><span class=\"token punctuation\">(<\/span><span class=\"token string\">&#034;couponStockRpc&#034;<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\nexecutorRule<span class=\"token punctuation\">.<\/span><span class=\"token function\">setExecutor<\/span><span class=\"token punctuation\">(<\/span>pool<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><br \/>\n<span class=\"token class-name\">ExecutorServiceRuleManager<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">loadRules<\/span><span class=\"token punctuation\">(<\/span><span class=\"token class-name\">Collections<\/span><span class=\"token punctuation\">.<\/span><span class=\"token function\">singletonList<\/span><span class=\"token punctuation\">(<\/span>executorRule<span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">)<\/span><span class=\"token punctuation\">;<\/span><\/p>\n<h4>4.4 \u9694\u79bb\u6a21\u5f0f\u4e1a\u52a1\u9009\u578b\u5efa\u8bae<\/h4>\n<li>\u672c\u5730\u5185\u5b58\u8ba1\u7b97\u3001\u672c\u5730\u65b9\u6cd5\u8c03\u7528&#xff1a;\u4fe1\u53f7\u91cf\u9694\u79bb&#xff0c;\u8f7b\u91cf\u9ad8\u6548&#xff1b;<\/li>\n<li>RPC\u8c03\u7528\u3001\u7b2c\u4e09\u65b9http\u63a5\u53e3\u3001IO\u5916\u90e8\u4f9d\u8d56&#xff1a;\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u5177\u5907\u8d85\u65f6\u80fd\u529b&#xff0c;\u5361\u6b7b\u4efb\u52a1\u53ef\u4ee5\u7ec8\u6b62&#xff1b;<\/li>\n<li>\u4e0d\u8981\u5168\u90e8\u4e1a\u52a1\u5171\u7528\u540c\u4e00\u4e2a\u9694\u79bb\u7ebf\u7a0b\u6c60&#xff0c;\u4e0d\u540c\u4e0b\u6e38\u4f9d\u8d56\u4f7f\u7528\u72ec\u7acb\u7ebf\u7a0b\u6c60&#xff0c;\u9632\u6b62\u5355\u70b9\u6545\u969c\u6269\u6563\u3002<\/li>\n<p>\u8865\u5145&#xff1a;Hystrix\u53ea\u6709\u7ebf\u7a0b\u6c60\u9694\u79bb\u548c\u4fe1\u53f7\u91cf\u9694\u79bb&#xff0c;\u6ca1\u6709\u539f\u751f\u9650\u6d41\u80fd\u529b&#xff1b;Sentinel\u628a\u9650\u6d41\u3001\u7194\u65ad\u3001\u9694\u79bb\u6574\u5408\u4e00\u5957\u4f53\u7cfb\u3002<\/p>\n<hr \/>\n<h3>\u7b2c\u4e94\u90e8\u5206&#xff1a;\u5b8c\u6574\u4e1a\u52a1\u7efc\u5408\u573a\u666f&#xff1a;\u5927\u4fc3\u9886\u5238\u670d\u52a1\u9632\u62a4<\/h3>\n<p>\u4e1a\u52a1\u80cc\u666f&#xff1a;<\/p>\n<p>\u6d3b\u52a8\u9886\u5238\u63a5\u53e3 receiveCoupon&#xff08;\u5199&#xff09;&#xff0c;\u5238\u67e5\u8be2 queryCoupon&#xff08;\u8bfb&#xff09;\u3002\u4f9d\u8d56\u4e0b\u6e38\u5238\u5e93\u5b58RPC\u670d\u52a1\u3002<br \/>\n\u9700\u6c42&#xff1a;<\/p>\n<li>\u9886\u5238\u63a5\u53e3QPS\u9650\u6d41&#xff1b;<\/li>\n<li>\u4e0b\u6e38\u5238\u5e93\u5b58RPC\u6162\u8c03\u7528\u3001\u62a5\u9519\u89e6\u53d1\u7194\u65ad&#xff1b;<\/li>\n<li>RPC\u8c03\u7528\u4f7f\u7528\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u9632\u6b62\u4e0b\u6e38\u5361\u6b7b\u5360\u6ee1tomcat\u7ebf\u7a0b&#xff1b;<\/li>\n<li>\u5927\u4fc3\u8fc7\u8f7d&#xff0c;\u9886\u5238\u5199\u62e6\u622a\u964d\u7ea7&#xff0c;\u5238\u67e5\u8be2\u8bfb\u4e0d\u53d7\u5f71\u54cd&#xff1b;<\/li>\n<li>\u9650\u6d41\u7194\u65ad\u5747\u914d\u7f6e\u515c\u5e95\u8fd4\u56de\u53cb\u597d\u63d0\u793a\u3002<\/li>\n<p>#mermaid-svg-MMHn7NorVcH6JUg7{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;fill:#333;}@keyframes edge-animation-frame{from{stroke-dashoffset:0;}}@keyframes dash{to{stroke-dashoffset:0;}}#mermaid-svg-MMHn7NorVcH6JUg7 .edge-animation-slow{stroke-dasharray:9,5!important;stroke-dashoffset:900;animation:dash 50s linear 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ms\\&#8221;,verdana,arial,sans-serif;font-size:16px;}#mermaid-svg-MMHn7NorVcH6JUg7 p{margin:0;}#mermaid-svg-MMHn7NorVcH6JUg7 .label{font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;color:#333;}#mermaid-svg-MMHn7NorVcH6JUg7 .cluster-label text{fill:#333;}#mermaid-svg-MMHn7NorVcH6JUg7 .cluster-label span{color:#333;}#mermaid-svg-MMHn7NorVcH6JUg7 .cluster-label span p{background-color:transparent;}#mermaid-svg-MMHn7NorVcH6JUg7 .label text,#mermaid-svg-MMHn7NorVcH6JUg7 span{fill:#333;color:#333;}#mermaid-svg-MMHn7NorVcH6JUg7 .node rect,#mermaid-svg-MMHn7NorVcH6JUg7 .node circle,#mermaid-svg-MMHn7NorVcH6JUg7 .node ellipse,#mermaid-svg-MMHn7NorVcH6JUg7 .node polygon,#mermaid-svg-MMHn7NorVcH6JUg7 .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#mermaid-svg-MMHn7NorVcH6JUg7 .rough-node .label text,#mermaid-svg-MMHn7NorVcH6JUg7 .node .label text,#mermaid-svg-MMHn7NorVcH6JUg7 .image-shape .label,#mermaid-svg-MMHn7NorVcH6JUg7 .icon-shape 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p,#mermaid-svg-MMHn7NorVcH6JUg7 .image-shape p{background-color:rgba(232,232,232, 0.8);padding:2px;}#mermaid-svg-MMHn7NorVcH6JUg7 .icon-shape .label rect,#mermaid-svg-MMHn7NorVcH6JUg7 .image-shape .label rect{opacity:0.5;background-color:rgba(232,232,232, 0.8);fill:rgba(232,232,232, 0.8);}#mermaid-svg-MMHn7NorVcH6JUg7 .label-icon{display:inline-block;height:1em;overflow:visible;vertical-align:-0.125em;}#mermaid-svg-MMHn7NorVcH6JUg7 .node .label-icon path{fill:currentColor;stroke:revert;stroke-width:revert;}#mermaid-svg-MMHn7NorVcH6JUg7 :root{&#8211;mermaid-font-family:\\&#8221;trebuchet ms\\&#8221;,verdana,arial,sans-serif;}<span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u89e6\u53d1\u9650\u6d41<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u89e6\u53d1\u7194\u65ad<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/p>\n<p>\u7ebf\u7a0b\u8017\u5c3d<\/p>\n<p><\/span><span class=\"edgeLabel\"><\/span><span class=\"nodeLabel\"><\/p>\n<p>User<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7f51\u5173<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>receiveCoupon \u9886\u5238\u5199<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>queryCoupon \u5238\u67e5\u8be2\u8bfb<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>Sentinel\u9632\u62a4\u94fe<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u6d41\u63a7\u89c4\u5219<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7194\u65ad\u964d\u7ea7\u89c4\u5219<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u7ebf\u7a0b\u6c60\u9694\u79bb<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u5e93\u5b58RPC\u4e0b\u6e38<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>blockHandler\u964d\u7ea7\u8fd4\u56de<\/p>\n<p><\/span><span class=\"nodeLabel\"><\/p>\n<p>\u5238\u67e5\u8be2\u8bfb\u4e0d\u53d7\u5199\u9650\u6d41\u5f71\u54cd\u4fdd\u969c\u7528\u6237\u53ef\u4ee5\u67e5\u81ea\u5df1\u5df2\u6709\u7684\u5238<\/p>\n<p><\/span><\/p>\n<p>\u9632\u62a4\u89c4\u5219\u6e05\u5355\u603b\u7ed3&#xff1a;<\/p>\n<li>\u5199\u7c7b\u578b\u6838\u5fc3\u63a5\u53e3\u914d\u7f6eQPS\u6d41\u91cf\u9650\u6d41&#xff0c;\u62e6\u622a\u7a81\u589e\u6d41\u91cf&#xff1b;<\/li>\n<li>\u4f7f\u7528\u5173\u8054\u6d41\u63a7\u5b9e\u73b0\u8bfb\u5199\u5206\u79bb\u9632\u62a4&#xff1a;\u5199\u8d44\u6e90\u6d41\u91cf\u8fc7\u8f7d\u65f6&#xff0c;\u4ec5\u62e6\u622a\u5199\u8bf7\u6c42&#xff0c;\u4fdd\u969c\u8bfb\u8d44\u6e90\u6b63\u5e38\u53ef\u7528&#xff1b;<\/li>\n<li>\u5916\u90e8RPC\/\u7b2c\u4e09\u65b9\u4f9d\u8d56\u8d44\u6e90\u914d\u7f6e\u7ebf\u7a0b\u6c60\u9694\u79bb &#043; \u7194\u65ad\u964d\u7ea7\u89c4\u5219&#xff0c;\u9694\u79bb\u4e0b\u6e38\u6545\u969c&#xff0c;\u6162\u8c03\u7528\u5360\u6ee1\u8d44\u6e90\u65f6\u89e6\u53d1\u7194\u65ad&#xff1b;<\/li>\n<li>\u53d7\u4fdd\u62a4\u8d44\u6e90\u540c\u65f6\u914d\u7f6eblockHandler\u6d41\u91cf\u9632\u62a4\u515c\u5e95\u4e0efallback\u4e1a\u52a1\u5f02\u5e38\u515c\u5e95&#xff1b;<\/li>\n<li>\u6240\u6709\u5916\u90e8\u7f51\u7edc\u8c03\u7528\u5f3a\u5236\u5f00\u542f\u5ba2\u6237\u7aef\u8d85\u65f6&#xff0c;\u907f\u514d\u7ebf\u7a0b\u65e0\u9650\u963b\u585e\u3002<\/li>\n<p>&#x1f330;\u4e1a\u52a1\u4e3e\u4f8b&#xff08;\u5bf9\u5e94\u672c\u6b21\u5927\u4fc3\u9886\u5238\u573a\u666f&#xff09;<\/p>\n<li>receiveCoupon\u9886\u5238\u5199\u63a5\u53e3\u8bbe\u7f6eQPS\u9650\u6d41&#xff1b;<\/li>\n<li>\u914d\u7f6e\u5173\u8054\u6d41\u63a7&#xff1a;\u76d1\u63a7\u9886\u5238\u5199\u8d44\u6e90\u6d41\u91cf&#xff0c;\u8fc7\u8f7d\u53ea\u62e6\u622a\u9886\u5238&#xff0c;queryCoupon\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u6b63\u5e38\u653e\u884c&#xff1b;<\/li>\n<li>\u5238\u5e93\u5b58RPC\u8d44\u6e90\u5f00\u542f\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u914d\u7f6e\u6162\u8c03\u7528\u6bd4\u4f8b\u7194\u65ad\u7b56\u7565&#xff1b;<\/li>\n<li>\u5728receiveCoupon\u8d44\u6e90\u4e0a\u540c\u65f6\u6307\u5b9ablockHandler\u3001fallback\u515c\u5e95\u65b9\u6cd5&#xff1b;<\/li>\n<li>\u5238\u5e93\u5b58RPC\u5ba2\u6237\u7aef\u8bbe\u7f6e\u5408\u7406\u8d85\u65f6\u65f6\u95f4&#xff0c;\u9632\u6b62\u8bf7\u6c42\u5361\u6b7b\u3002<\/li>\n<hr \/>\n<h3>\u5c0f\u8282\u5751\u70b9\u6c47\u603b<\/h3>\n<li>&#064;SentinelResource\u53ea\u5bf9public\u751f\u6548&#xff0c;\u540c\u7c7b\u5185\u90e8\u8c03\u7528\u4e0d\u4f1a\u8d70Sentinel\u9632\u62a4\u903b\u8f91&#xff1b;<\/li>\n<li>Sentinel\u6ce8\u89e3\u9ed8\u8ba4\u662f\u4fe1\u53f7\u91cf\u9694\u79bb&#xff0c;\u4e0d\u662f\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff0c;\u4e0d\u652f\u6301\u7ebf\u7a0b\u4e2d\u65ad&#xff0c;\u5916\u90e8RPC\u4e0d\u8981\u8e29\u5751&#xff1b;<\/li>\n<li>blockHandler\u53ea\u6355\u83b7Sentinel\u6d41\u91cf\u9632\u62a4\u5f02\u5e38BlockException&#xff1b;\u4e1a\u52a1\u5f02\u5e38\u8d70fallback&#xff1b;\u4e24\u8005\u4e0d\u8981\u6df7\u6dc6&#xff1b;<\/li>\n<li>\u5173\u8054\u6d41\u63a7\u6a21\u5f0f&#xff1a;\u5173\u8054\u8d44\u6e90\u662f\u9608\u503c\u5224\u65ad\u5bf9\u8c61&#xff0c;\u9650\u6d41\u4f5c\u7528\u5728\u914d\u7f6e\u7684resource\u4e0a&#xff0c;\u914d\u7f6e\u6781\u6613\u5199\u53cd&#xff1b;<\/li>\n<li>\u7194\u65ad\u9700\u8981\u8fbe\u5230minRequestAmount\u6700\u5c0f\u8bf7\u6c42\u6570&#xff0c;\u5426\u5219\u4e0d\u4f1a\u89e6\u53d1\u7194\u65ad&#xff1b;<\/li>\n<li>\u7ebf\u7a0b\u6c60\u9694\u79bb\u6a21\u5f0f&#xff0c;MDC\u3001traceId\u4e0a\u4e0b\u6587\u9700\u8981\u624b\u52a8\u4f20\u9012&#xff1b;<\/li>\n<li>\u4e0d\u8981\u5728\u4e1a\u52a1\u4ee3\u7801\u786c\u7f16\u7801\u89c4\u5219&#xff0c;\u751f\u4ea7\u73af\u5883\u5efa\u8bae\u628a\u89c4\u5219\u6301\u4e45\u5316\u5230Nacos\u914d\u7f6e\u4e2d\u5fc3&#xff0c;Sentinel\u63a7\u5236\u53f0\u52a8\u6001\u4fee\u6539&#xff1b;<\/li>\n<li>\u9632\u62a4\u515c\u5e95\u903b\u8f91\u4e0d\u80fd\u505a\u91cd\u91cf\u7ea7IO&#xff0c;\u964d\u7ea7\u903b\u8f91\u5c3d\u91cf\u5185\u5b58\u8fd4\u56de\u7f13\u5b58\u6216\u8005\u9ed8\u8ba4\u503c\u3002<\/li>\n<hr \/>\n<h3>\u6587\u672b\u7efc\u5408\u603b\u7ed3<\/h3>\n<li>Sentinel\u4e09\u5927\u6838\u5fc3\u80fd\u529b&#xff1a;\u9650\u6d41\u4fdd\u62a4\u5165\u53e3\u6d41\u91cf\u3001\u7194\u65ad\u4fdd\u62a4\u4e0d\u7a33\u5b9a\u4e0b\u6e38\u3001\u9694\u79bb\u9650\u5236\u5e76\u53d1\u8d44\u6e90\u9632\u6b62\u7ebf\u7a0b\u8017\u5c3d&#xff1b;<\/li>\n<li>\u8d44\u6e90Resource\u662fSentinel\u7684\u6700\u5c0f\u4fdd\u62a4\u5355\u5143&#xff0c;&#064;SentinelResource\u57cb\u70b9&#xff0c;\u533a\u5206blockHandler\u6d41\u91cf\u62e6\u622a\u3001fallback\u4e1a\u52a1\u5f02\u5e38\u964d\u7ea7&#xff1b;<\/li>\n<li>\u9650\u6d41\u6709\u76f4\u63a5\u3001\u5173\u8054\u3001\u94fe\u8def\u6a21\u5f0f&#xff1b;\u5927\u4fc3\u573a\u666f\u4f7f\u7528\u5173\u8054\u6d41\u63a7\u5b9e\u73b0&#xff1a;\u5199\u63a5\u53e3\u8fc7\u8f7d\u9650\u6d41&#xff0c;\u8bfb\u63a5\u53e3\u7ee7\u7eed\u53ef\u7528&#xff1b;<\/li>\n<li>\u7194\u65ad\u4e09\u79cd\u7b56\u7565&#xff1a;\u6162\u8c03\u7528\u6bd4\u4f8b\u3001\u5f02\u5e38\u6bd4\u4f8b\u3001\u5f02\u5e38\u6570&#xff1b;\u7194\u65ad\u5668\u4e09\u72b6\u6001&#xff1a;\u5173\u95ed\u3001\u6253\u5f00\u3001\u534a\u5f00&#xff1b;<\/li>\n<li>\u9694\u79bb\u5206\u4e3a\u4fe1\u53f7\u91cf\u9694\u79bb&#xff08;\u9ed8\u8ba4\u8f7b\u91cf&#xff0c;\u65e0\u8d85\u65f6\u4e2d\u65ad&#xff09;\u3001\u7ebf\u7a0b\u6c60\u9694\u79bb&#xff08;\u72ec\u7acb\u7ebf\u7a0b\u6c60&#xff0c;\u652f\u6301\u8d85\u65f6&#xff0c;\u9002\u5408RPC\u5916\u90e8\u8c03\u7528&#xff09;&#xff1b;<\/li>\n<li>\u7ebf\u4e0a\u7a33\u5b9a\u6027\u76ee\u6807&#xff1a;\u5141\u8bb8\u90e8\u5206\u975e\u6838\u5fc3\u529f\u80fd\u964d\u7ea7&#xff0c;\u4fdd\u969c\u6838\u5fc3\u94fe\u8def\u53ef\u7528&#xff0c;\u963b\u6b62\u6545\u969c\u7ea7\u8054\u96ea\u5d29\u3002<\/li>\n<h4>\u8bfe\u540e\u601d\u8003\u9898&#xff08;\u9762\u8bd5\u590d\u76d8&#xff09;<\/h4>\n<li>blockHandler \u548c fallback \u6709\u4ec0\u4e48\u533a\u522b&#xff0c;\u5206\u522b\u4ec0\u4e48\u573a\u666f\u89e6\u53d1&#xff1f;<\/li>\n<li>Sentinel\u9ed8\u8ba4\u4fe1\u53f7\u91cf\u9694\u79bb\u6709\u4ec0\u4e48\u7f3a\u9677&#xff1f;\u4e3a\u4ec0\u4e48\u8c03\u7528\u5916\u90e8RPC\u4e0d\u5efa\u8bae\u53ea\u7528\u9ed8\u8ba4\u4fe1\u53f7\u91cf\u9694\u79bb&#xff1f;<\/li>\n<li>\u5173\u8054\u6d41\u63a7\u6a21\u5f0f&#xff0c;\u5982\u4f55\u5b9e\u73b0&#xff1a;\u9886\u5238\u5199\u63a5\u53e3\u8fc7\u8f7d\u9650\u6d41&#xff0c;\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u4e0d\u53d7\u5f71\u54cd&#xff1f;<\/li>\n<li>\u7194\u65ad\u5668OPEN\u3001HALF_OPEN\u3001CLOSED\u4e09\u79cd\u72b6\u6001\u6d41\u8f6c\u903b\u8f91&#xff0c;\u534a\u5f00\u72b6\u6001\u4f5c\u7528\u662f\u4ec0\u4e48&#xff1f;<\/li>\n<li>Sentinel\u548cHystrix\u5728\u9694\u79bb\u6a21\u5f0f\u4e0a\u7684\u6838\u5fc3\u5dee\u5f02\u662f\u4ec0\u4e48&#xff1f;<\/li>\n<li>\u5982\u679c\u4e0b\u6e38RPC\u4e00\u76f4\u963b\u585e\u4e0d\u8fd4\u56de&#xff0c;\u53ea\u7528\u4fe1\u53f7\u91cf\u9694\u79bb\u4f1a\u53d1\u751f\u4ec0\u4e48\u7ebf\u4e0a\u6545\u969c&#xff1f;<\/li>\n","protected":false},"excerpt":{"rendered":"<p>\u524d\u8a00<br \/>\n\u5728\u5fae\u670d\u52a1\u4f53\u7cfb\u4e2d&#xff0c;\u670d\u52a1\u8c03\u7528\u94fe\u9519\u7efc\u590d\u6742&#xff0c;\u4e00\u4e2a\u4e0b\u6e38\u670d\u52a1\u5361\u987f\u3001\u8d85\u65f6\u3001\u6d41\u91cf\u66b4\u6da8&#xff0c;\u5c31\u4f1a\u5411\u4e0a\u4f20\u5bfc&#xff0c;\u5f15\u53d1\u7ea7\u8054\u96ea\u5d29\u3002Sentinel \u662f\u963f\u91cc\u5f00\u6e90\u7684\u6d41\u91cf\u9632\u62a4\u7ec4\u4ef6&#xff0c;\u6838\u5fc3\u80fd\u529b&#xff1a;\u9650\u6d41\u3001\u7194\u65ad\u964d\u7ea7\u3001\u7ebf\u7a0b\u9694\u79bb\u3001\u7cfb\u7edf\u81ea\u9002\u5e94\u4fdd\u62a4\u3001\u70ed\u70b9\u53c2\u6570\u9632\u62a4\u3002<br \/>\n\u672c\u6587\u7ed3\u5408\u771f\u5b9e\u4e1a\u52a1\u6848\u4f8b&#xff1a;\u5927\u4fc3\u9886\u5238\u6d3b\u52a8&#xff0c;\u8fc7\u8f7d\u65f6\u5173\u95ed\u9886\u5238\u5199\u63a5\u53e3&#xff0c;\u4f46\u4fdd\u7559\u5238\u67e5\u8be2\u8bfb\u63a5\u53e3\u53ef\u7528&#xff0c;\u5b8c\u6574\u8bb2\u89e3Sentinel\u6838\u5fc3\u6982\u5ff5\u3001\u4e24\u79cd\u9694\u79bb<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[292,383],"topic":[],"class_list":["post-106913","post","type-post","status-publish","format-standard","hentry","category-server","tag-292","tag-383"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>SpringCloud Alibaba Sentinel 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