/**
* 这里会判断当前调用服务的状态，分析判断是否需要进入降级状态 如果服务在指定的时间区间内累积的错误，达到了配置的次数，则进入服务降级
* 如果满足上面条件，并且满足重试机制，则也不会进入降级流程，而是触发远程服务调用
*
* @param invoker
* @param invocation
* @return
*/
private boolean checkNeedCircuitBreak(Invoker<?> invoker, Invocation invocation) {
String interfaceName = invoker.getUrl().getParameter(Constants.INTERFACE_KEY);
String method = invocation.getMethodName();
String methodKey = Config.getMethodPropertyName(invoker, invocation).toString();
int limit = Config.getBreakLimit(invoker, invocation);
BreakCounter breakCounter = breakCounterMap.get(methodKey);
if (breakCounter != null && breakCounter.isEnable()) {
long currentExceptionCount = breakCounter.getCurrentExceptionCount();
long currentBreakCount = breakCounter.getCurrentBreakCount();
logger.info(
"[{}] check invoke [{}.{}] circuit break,current exception count [{}] limit [{}]",
localHost,
interfaceName,
method,
currentExceptionCount,
limit);
if (limit <= currentExceptionCount) {
if (currentBreakCount > 0 && needRetry(invoker, invocation, currentBreakCount)) {
logger.info(
"[{}] retry invoke [{}.{}] current break count [{}]",
localHost,
interfaceName,
method,
currentBreakCount);
breakCounter.incrementRetryTimes();
return false;
}
return true;
}
}
return false;
}
