protected RpcResponse doExecute(RpcRequest request) {
Connection c = null;
ConnectionSpec auth = null;
try {
try {
outputRequestInfo("doExecute: Before validateRequest...", request);
request = validateRequest(request);
outputRequestInfo("doExecute: After validateRequest...", request);
RpcHost host = request.getHost();
auth = createConnectionSpec(request);
outputAuthInfo(auth);
c = this.connectionFactory.getConnection(host, auth);
} catch (RpcException e) {
logger.error("doExecute: RpcException occurred. Error: " + e.getMessage(), e);
fireRpcExceptionEvent(request, e);
throw getExceptionTranslator()
.translate("open", RpcUriUtils.sanitize(request.getUriString(), auth), e);
}
try {
logger.debug("executing {}", RpcUriUtils.sanitize(request.getUriString(), auth));
RpcResponse response = c.send(request);
logger.debug("received {}", response.toString());
fireRpcResponseEvent(request, response);
return response;
} catch (RpcException e) {
fireRpcExceptionEvent(request, e);
throw getExceptionTranslator()
.translate("send", RpcUriUtils.sanitize(request.getUriString(), auth), e);
}
} catch (DataAccessException e) {
if (e instanceof PermissionDeniedDataAccessException) {
logger.debug(
"permission denied in " + RpcUriUtils.sanitize(request.getUriString(), auth), e);
} else {
logger.error("error in " + RpcUriUtils.sanitize(request.getUriString(), auth), e);
}
throw e;
} finally {
try {
if (c != null) c.close();
} catch (RpcException e) {
fireRpcExceptionEvent(request, e);
throw getExceptionTranslator()
.translate("close", RpcUriUtils.sanitize(request.getUriString(), auth), e);
}
}
}
private Result wrapBreakerInvoke(Invoker<?> invoker, Invocation invocation) throws RpcException {
// 首先检查是否需要进入服务降级流程
if (checkNeedCircuitBreak(invoker, invocation)) {
logger.info(
"[{}] activate the circuit break for url [{}],invoke method [{}]",
localHost,
invoker.getUrl(),
invocation.getMethodName());
// 进入服务降级
return doCircuitBreak(invoker, invocation);
}
try {
Result result = invoker.invoke(invocation);
// 将该服务从服务降级中恢复出来
toBeNormal(invoker, invocation);
return result;
} catch (RpcException e) {
// 如果是请求超时或者网络异常，进行异常统计
if (!e.isBiz()) {
caughtException(invoker, invocation, e);
}
throw e;
}
}
@Override
protected RpcException mapException(Exception ex) {
return RpcException.mapException(ex);
}
@Override
public void setException(Throwable t) {
handler.failed(RpcException.mapException(t));
}
