mirror of https://gitee.com/bigwinds/arangodb
106 lines
4.1 KiB
C++
106 lines
4.1 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2018 ArangoDB GmbH, Cologne, Germany
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/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Kaveh Vahedipour
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////////////////////////////////////////////////////////////////////////////////
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#include "AgentCallback.h"
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#include "Agency/Agent.h"
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#include "ApplicationFeatures/ApplicationServer.h"
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using namespace arangodb::application_features;
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using namespace arangodb::consensus;
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using namespace arangodb::velocypack;
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AgentCallback::AgentCallback()
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: _agent(nullptr), _last(0), _toLog(0), _startTime(0.0) {}
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AgentCallback::AgentCallback(Agent* agent, std::string const& slaveID, index_t last, size_t toLog)
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: _agent(agent),
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_last(last),
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_slaveID(slaveID),
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_toLog(toLog),
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_startTime(TRI_microtime()) {}
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void AgentCallback::shutdown() { _agent = nullptr; }
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bool AgentCallback::operator()(arangodb::ClusterCommResult* res) {
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if (res->status == CL_COMM_SENT) {
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if (_agent) {
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auto body = res->result->getBodyVelocyPack();
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bool success = false;
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term_t otherTerm = 0;
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try {
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success = body->slice().get("success").isTrue();
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otherTerm = body->slice().get("term").getNumber<term_t>();
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} catch (std::exception const& e) {
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LOG_TOPIC("1b7bb", WARN, Logger::AGENCY) << "Bad callback message received: " << e.what();
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_agent->reportFailed(_slaveID, _toLog);
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}
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if (otherTerm > _agent->term()) {
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_agent->resign(otherTerm);
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} else if (!success) {
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LOG_TOPIC("7cbce", DEBUG, Logger::CLUSTER)
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<< "Got negative answer from follower, will retry later.";
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// This reportFailed will reset _confirmed in Agent fot this follower
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_agent->reportFailed(_slaveID, _toLog, true);
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} else {
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Slice senderTimeStamp = body->slice().get("senderTimeStamp");
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if (senderTimeStamp.isInteger()) {
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try {
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int64_t sts = senderTimeStamp.getNumber<int64_t>();
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int64_t now = std::llround(steadyClockToDouble() * 1000);
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if (now - sts > 1000) { // a second round trip time!
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LOG_TOPIC("c2aac", DEBUG, Logger::AGENCY)
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<< "Round trip for appendEntriesRPC took " << now - sts
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<< " milliseconds, which is way too high!";
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}
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} catch (...) {
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LOG_TOPIC("b1549", WARN, Logger::AGENCY)
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<< "Exception when looking at senderTimeStamp in "
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"appendEntriesRPC"
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" answer.";
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}
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}
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LOG_TOPIC("0bfa4", DEBUG, Logger::AGENCY) << "AgentCallback: " << body->slice().toJson();
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_agent->reportIn(_slaveID, _last, _toLog);
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}
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}
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LOG_TOPIC("8b0d8", DEBUG, Logger::AGENCY)
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<< "Got good callback from AppendEntriesRPC: "
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<< "comm_status(" << res->status << "), last(" << _last << "), follower("
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<< _slaveID << "), time(" << TRI_microtime() - _startTime << ")";
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} else {
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if (!ApplicationServer::isStopping() && (_agent == nullptr || !_agent->isStopping())) {
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// Do not warn if we are already shutting down:
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LOG_TOPIC("2c712", WARN, Logger::AGENCY)
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<< "Got bad callback from AppendEntriesRPC: "
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<< "comm_status(" << res->status << "), last(" << _last << "), follower("
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<< _slaveID << "), time(" << TRI_microtime() - _startTime << ")";
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}
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if (_agent != nullptr) {
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_agent->reportFailed(_slaveID, _toLog);
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}
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}
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return true;
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}
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