mirror of https://gitee.com/bigwinds/arangodb
308 lines
10 KiB
C++
308 lines
10 KiB
C++
////////////////////////////////////////////////////////////////////////////////
|
|
/// DISCLAIMER
|
|
///
|
|
/// Copyright 2014-2016 ArangoDB GmbH, Cologne, Germany
|
|
/// Copyright 2004-2014 triAGENS GmbH, Cologne, Germany
|
|
///
|
|
/// Licensed under the Apache License, Version 2.0 (the "License");
|
|
/// you may not use this file except in compliance with the License.
|
|
/// You may obtain a copy of the License at
|
|
///
|
|
/// http://www.apache.org/licenses/LICENSE-2.0
|
|
///
|
|
/// Unless required by applicable law or agreed to in writing, software
|
|
/// distributed under the License is distributed on an "AS IS" BASIS,
|
|
/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
/// See the License for the specific language governing permissions and
|
|
/// limitations under the License.
|
|
///
|
|
/// Copyright holder is ArangoDB GmbH, Cologne, Germany
|
|
///
|
|
/// @author Kaveh Vahedipour
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#include "RestAgencyHandler.h"
|
|
|
|
#include <velocypack/Builder.h>
|
|
#include <velocypack/velocypack-aliases.h>
|
|
|
|
#include "Agency/Agent.h"
|
|
#include "Basics/StaticStrings.h"
|
|
#include "Logger/Logger.h"
|
|
#include "Rest/HttpRequest.h"
|
|
#include "Rest/Version.h"
|
|
|
|
#include <thread>
|
|
|
|
using namespace arangodb;
|
|
|
|
using namespace arangodb::basics;
|
|
using namespace arangodb::rest;
|
|
using namespace arangodb::consensus;
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
/// @brief ArangoDB server
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
RestAgencyHandler::RestAgencyHandler(HttpRequest* request, Agent* agent)
|
|
: RestBaseHandler(request), _agent(agent) {}
|
|
|
|
bool RestAgencyHandler::isDirect() const { return false; }
|
|
|
|
inline HttpHandler::status_t RestAgencyHandler::reportErrorEmptyRequest() {
|
|
LOG_TOPIC(WARN, Logger::AGENCY)
|
|
<< "Empty request to public agency interface.";
|
|
generateError(GeneralResponse::ResponseCode::NOT_FOUND, 404);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
inline HttpHandler::status_t RestAgencyHandler::reportTooManySuffices() {
|
|
LOG_TOPIC(WARN, Logger::AGENCY)
|
|
<< "Too many suffixes. Agency public interface takes one path.";
|
|
generateError(GeneralResponse::ResponseCode::NOT_FOUND, 404);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
inline HttpHandler::status_t RestAgencyHandler::reportUnknownMethod() {
|
|
LOG_TOPIC(WARN, Logger::AGENCY) << "Public REST interface has no method "
|
|
<< _request->suffix()[0];
|
|
generateError(GeneralResponse::ResponseCode::NOT_FOUND, 405);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
void RestAgencyHandler::redirectRequest(arangodb::consensus::id_t leaderId) {
|
|
try {
|
|
std::string url =
|
|
Endpoint::uriForm(_agent->config().endpoints.at(leaderId)) +
|
|
_request->requestPath();
|
|
createResponse(GeneralResponse::ResponseCode::TEMPORARY_REDIRECT);
|
|
_response->setHeaderNC(StaticStrings::Location, url);
|
|
} catch (std::exception const& e) {
|
|
LOG_TOPIC(WARN, Logger::AGENCY) << e.what() << " " << __FILE__ << __LINE__;
|
|
generateError(GeneralResponse::ResponseCode::SERVER_ERROR,
|
|
TRI_ERROR_INTERNAL, e.what());
|
|
}
|
|
}
|
|
|
|
HttpHandler::status_t RestAgencyHandler::handleStores() {
|
|
if (_request->requestType() == GeneralRequest::RequestType::GET) {
|
|
Builder body;
|
|
body.openObject();
|
|
body.add("spearhead", VPackValue(VPackValueType::Array));
|
|
_agent->spearhead().dumpToBuilder(body);
|
|
body.close();
|
|
body.add("read_db", VPackValue(VPackValueType::Array));
|
|
_agent->readDB().dumpToBuilder(body);
|
|
body.close();
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::OK, body.slice());
|
|
} else {
|
|
generateError(GeneralResponse::ResponseCode::BAD, 400);
|
|
}
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
HttpHandler::status_t RestAgencyHandler::handleWrite() {
|
|
arangodb::velocypack::Options options; // TODO: User not wait.
|
|
if (_request->requestType() == GeneralRequest::RequestType::POST) {
|
|
query_t query;
|
|
|
|
try {
|
|
query = _request->toVelocyPack(&options);
|
|
} catch (std::exception const& e) {
|
|
LOG_TOPIC(ERR, Logger::AGENCY) << e.what() << " " << __FILE__ << __LINE__;
|
|
Builder body;
|
|
body.openObject();
|
|
body.add("message", VPackValue(e.what()));
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::BAD, body.slice());
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
if (!query->slice().isArray()) {
|
|
Builder body;
|
|
body.openObject();
|
|
body.add("message",
|
|
VPackValue("Excpecting array of arrays as body for writes"));
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::BAD, body.slice());
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
if (query->slice().length() == 0) {
|
|
Builder body;
|
|
body.openObject();
|
|
body.add(
|
|
"message", VPackValue("Empty request."));
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::BAD, body.slice());
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
while(_agent->size() > 1 && _agent->leaderID() > 100) {
|
|
std::this_thread::sleep_for(duration_t(100));
|
|
}
|
|
|
|
write_ret_t ret = _agent->write(query);
|
|
|
|
if (ret.accepted) { // We're leading and handling the request
|
|
|
|
bool found;
|
|
std::string call_mode = _request->header("x-arangodb-agency-mode", found);
|
|
if (!found) {
|
|
call_mode = "waitForCommitted";
|
|
}
|
|
|
|
size_t errors = 0;
|
|
Builder body;
|
|
body.openObject();
|
|
|
|
if (call_mode != "noWait") {
|
|
// Note success/error
|
|
body.add("results", VPackValue(VPackValueType::Array));
|
|
for (auto const& index : ret.indices) {
|
|
body.add(VPackValue(index));
|
|
if (index == 0) {
|
|
errors++;
|
|
}
|
|
}
|
|
body.close();
|
|
|
|
// Wait for commit of highest except if it is 0?
|
|
if (!ret.indices.empty() && call_mode == "waitForCommitted") {
|
|
arangodb::consensus::index_t max_index = 0;
|
|
try {
|
|
max_index =
|
|
*std::max_element(ret.indices.begin(), ret.indices.end());
|
|
} catch (std::exception const& e) {
|
|
LOG_TOPIC(WARN, Logger::AGENCY)
|
|
<< e.what() << " " << __FILE__ << __LINE__;
|
|
}
|
|
|
|
if (max_index > 0) {
|
|
if(!_agent->waitFor(max_index)) {
|
|
LOG_TOPIC(WARN, Logger::AGENCY)
|
|
<< "Waiting for log index" << max_index << " timed out.";
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
body.close();
|
|
|
|
if (errors > 0) { // Some/all requests failed
|
|
generateResult(GeneralResponse::ResponseCode::PRECONDITION_FAILED,
|
|
body.slice());
|
|
} else { // All good
|
|
generateResult(GeneralResponse::ResponseCode::OK, body.slice());
|
|
}
|
|
} else { // Redirect to leader
|
|
redirectRequest(ret.redirect);
|
|
}
|
|
} else { // Unknown method
|
|
generateError(GeneralResponse::ResponseCode::METHOD_NOT_ALLOWED, 405);
|
|
}
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
inline HttpHandler::status_t RestAgencyHandler::handleRead() {
|
|
arangodb::velocypack::Options options;
|
|
if (_request->requestType() == GeneralRequest::RequestType::POST) {
|
|
query_t query;
|
|
try {
|
|
query = _request->toVelocyPack(&options);
|
|
} catch (std::exception const& e) {
|
|
LOG_TOPIC(WARN, Logger::AGENCY) << e.what() << " " << __FILE__ << __LINE__;
|
|
generateError(GeneralResponse::ResponseCode::BAD, 400);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
while(_agent->size() > 1 && _agent->leaderID() > 100) {
|
|
std::this_thread::sleep_for(duration_t(100));
|
|
}
|
|
|
|
read_ret_t ret = _agent->read(query);
|
|
|
|
if (ret.accepted) { // I am leading
|
|
if (ret.success.size() == 1 && !ret.success.at(0)) {
|
|
generateResult(GeneralResponse::ResponseCode::I_AM_A_TEAPOT,
|
|
ret.result->slice());
|
|
} else {
|
|
generateResult(GeneralResponse::ResponseCode::OK, ret.result->slice());
|
|
}
|
|
} else { // Redirect to leader
|
|
redirectRequest(ret.redirect);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
} else {
|
|
generateError(GeneralResponse::ResponseCode::METHOD_NOT_ALLOWED, 405);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
HttpHandler::status_t RestAgencyHandler::handleConfig() {
|
|
Builder body;
|
|
body.add(VPackValue(VPackValueType::Object));
|
|
body.add("term", Value(_agent->term()));
|
|
body.add("leaderId", Value(_agent->leaderID()));
|
|
body.add("configuration", _agent->config().toBuilder()->slice());
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::OK, body.slice());
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
HttpHandler::status_t RestAgencyHandler::handleState() {
|
|
Builder body;
|
|
body.add(VPackValue(VPackValueType::Array));
|
|
for (auto const& i : _agent->state().get()) {
|
|
body.add(VPackValue(VPackValueType::Object));
|
|
body.add("index", VPackValue(i.index));
|
|
body.add("term", VPackValue(i.term));
|
|
body.add("leader", VPackValue(i.leaderId));
|
|
body.add("query", VPackSlice(i.entry->data()));
|
|
body.close();
|
|
}
|
|
body.close();
|
|
generateResult(GeneralResponse::ResponseCode::OK, body.slice());
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
inline HttpHandler::status_t RestAgencyHandler::reportMethodNotAllowed() {
|
|
generateError(GeneralResponse::ResponseCode::METHOD_NOT_ALLOWED, 405);
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|
|
|
|
HttpHandler::status_t RestAgencyHandler::execute() {
|
|
try {
|
|
if (_request->suffix().size() == 0) { // Empty request
|
|
return reportErrorEmptyRequest();
|
|
} else if (_request->suffix().size() > 1) { // path size >= 2
|
|
return reportTooManySuffices();
|
|
} else {
|
|
if (_request->suffix()[0] == "write") {
|
|
return handleWrite();
|
|
} else if (_request->suffix()[0] == "read") {
|
|
return handleRead();
|
|
} else if (_request->suffix()[0] == "config") {
|
|
if (_request->requestType() != GeneralRequest::RequestType::GET) {
|
|
return reportMethodNotAllowed();
|
|
}
|
|
return handleConfig();
|
|
} else if (_request->suffix()[0] == "state") {
|
|
if (_request->requestType() != GeneralRequest::RequestType::GET) {
|
|
return reportMethodNotAllowed();
|
|
}
|
|
return handleState();
|
|
} else if (_request->suffix()[0] == "stores") {
|
|
return handleStores();
|
|
} else {
|
|
return reportUnknownMethod();
|
|
}
|
|
}
|
|
} catch (...) {
|
|
// Ignore this error
|
|
}
|
|
return HttpHandler::status_t(HANDLER_DONE);
|
|
}
|