我要评论发布新版本时如果直接 kill 进程，正在处理的请求会中断，数据可能不一致。优雅关闭让应用处理完当前请求再停止。
一、优雅关闭
server:
shutdown: graceful
spring:
lifecycle:
timeout-per-shutdown-phase: 30s二、手动降级
@component
public class degradeservice {
private final map<string, boolean> degraderules = new concurrenthashmap<>();
public boolean isdegrade(string key) {
return degraderules.getordefault(key, false);
}
public void enabledegrade(string key) {
degraderules.put(key, true);
}
public void disabledegrade(string key) {
degraderules.put(key, false);
}
public <t> t execute(string key, supplier<t> supplier, t fallback) {
if (isdegrade(key)) return fallback;
return supplier.get();
}
}
三、熔断降级
@restcontroller
public class degradecontroller {
@autowired
private degradeservice degradeservice;
@postmapping("/degrade/enable")
public resultvo<?> enable(@requestparam string key) {
degradeservice.enabledegrade(key);
return resultvo.success("已开启: " + key);
}
@postmapping("/degrade/disable")
public resultvo<?> disable(@requestparam string key) {
degradeservice.disabledegrade(key);
return resultvo.success("已关闭: " + key);
}
}
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