public Result invoke(Invoker<?> invoker, Invocation invocation) throws RpcException {try {Result result = invoker.invoke(invocation);if (result.hasException() && GenericService.class != invoker.getInterface()) {try {Throwable exception = result.getException();// 如果是检查异常直接返回结果if (!(exception instanceof RuntimeException) && (exception instanceof Exception)) {return result;}// 如果接口已经声明了抛出该异常直接返回结果try {Method method = invoker.getInterface().getMethod(invocation.getMethodName(), invocation.getParameterTypes());Class<?>[] exceptionClassses = method.getExceptionTypes();for (Class<?> exceptionClass : exceptionClassses) {if (exception.getClass().equals(exceptionClass)) {return result;}}} catch (NoSuchMethodException e) {return result;}// 如果是未声明的运行时异常在日志中输出异常(换句话说，除了这种情况，provider是不会打印异常的)logger.error("Got unchecked and undeclared exception which called by " + RpcContext.getContext().getRemoteHost()+ ". service: " + invoker.getInterface().getName() + ", method: " + invocation.getMethodName()+ ", exception: " + exception.getClass().getName() + ": " + exception.getMessage(), exception);// directly throw if exception class and interface class are in the same jar file.String serviceFile = ReflectUtils.getCodeBase(invoker.getInterface());String exceptionFile = ReflectUtils.getCodeBase(exception.getClass());if (serviceFile == null || exceptionFile == null || serviceFile.equals(exceptionFile)) {return result;}// directly throw if it's JDK exceptionString className = exception.getClass().getName();if (className.startsWith("java.") || className.startsWith("javax.")) {return result;}// directly throw if it's dubbo exceptionif (exception instanceof RpcException) {return result;}// otherwise, wrap with RuntimeException and throw back to the clientreturn new RpcResult(new RuntimeException(StringUtils.toString(exception)));} catch (Throwable e) {logger.warn("Fail to ExceptionFilter when called by " + RpcContext.getContext().getRemoteHost()+ ". service: " + invoker.getInterface().getName() + ", method: " + invocation.getMethodName()+ ", exception: " + e.getClass().getName() + ": " + e.getMessage(), e);return result;}}return result;} catch (RuntimeException e) {logger.error("Got unchecked and undeclared exception which called by " + RpcContext.getContext().getRemoteHost()+ ". service: " + invoker.getInterface().getName() + ", method: " + invocation.getMethodName()+ ", exception: " + e.getClass().getName() + ": " + e.getMessage(), e);throw e;}}