mirror of https://gitee.com/bigwinds/arangodb
116 lines
4.2 KiB
C++
116 lines
4.2 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2016 ArangoDB 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 Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#include "RestPregelHandler.h"
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#include "ApplicationFeatures/ApplicationServer.h"
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#include "Rest/HttpRequest.h"
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#include <velocypack/Builder.h>
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#include <velocypack/velocypack-aliases.h>
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#include "Pregel/PregelFeature.h"
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#include "Pregel/Conductor.h"
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#include "Pregel/Worker.h"
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#include "Pregel/Utils.h"
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using namespace arangodb;
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using namespace arangodb::basics;
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using namespace arangodb::rest;
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using namespace arangodb::pregel;
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RestPregelHandler::RestPregelHandler(GeneralRequest* request, GeneralResponse* response)
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: RestVocbaseBaseHandler(request, response) {}
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RestStatus RestPregelHandler::execute() {
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try {
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bool parseSuccess = true;
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std::shared_ptr<VPackBuilder> parsedBody =
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parseVelocyPackBody(&VPackOptions::Defaults, parseSuccess);
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VPackSlice body(parsedBody->start());// never nullptr
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if (!parseSuccess || !body.isObject()) {
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LOG(ERR) << "Bad request body\n";
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generateError(rest::ResponseCode::BAD,
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TRI_ERROR_NOT_IMPLEMENTED, "illegal request for /_api/pregel");
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} else if (_request->requestType() == rest::RequestType::POST) {
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std::vector<std::string> const& suffix = _request->suffix();
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VPackSlice sExecutionNum = body.get(Utils::executionNumberKey);
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if (!sExecutionNum.isInteger()) {
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LOG(ERR) << "Invalid execution number";
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generateError(rest::ResponseCode::NOT_FOUND, TRI_ERROR_HTTP_NOT_FOUND);
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return RestStatus::DONE;
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}
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unsigned int executionNumber = sExecutionNum.getUInt();
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if (suffix.size() != 1) {
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LOG(ERR) << "Invalid suffix";
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generateError(rest::ResponseCode::NOT_FOUND,
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TRI_ERROR_HTTP_NOT_FOUND);
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return RestStatus::DONE;
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} else if (suffix[0] == Utils::finishedGSSPath) {
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Conductor *exe = PregelFeature::instance()->conductor(executionNumber);
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if (exe) {
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exe->finishedGlobalStep(body);
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} else {
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LOG(ERR) << "Conductor not found: " << executionNumber;
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}
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} else if (suffix[0] == Utils::nextGSSPath) {
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IWorker *w = PregelFeature::instance()->worker(executionNumber);
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if (!w) {// can happen if gss == 0
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LOG(INFO) << "creating worker";
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w = IWorker::createWorker(_vocbase, body);
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PregelFeature::instance()->addWorker(w, executionNumber);
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}
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w->nextGlobalStep(body);
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} else if (suffix[0] == Utils::messagesPath) {
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LOG(INFO) << "messages";
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IWorker *exe = PregelFeature::instance()->worker(executionNumber);
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if (exe) {
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exe->receivedMessages(body);
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}
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} else if (suffix[0] == Utils::finalizeExecutionPath) {
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IWorker *exe = PregelFeature::instance()->worker(executionNumber);
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if (exe) {
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exe->finalizeExecution(body);
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PregelFeature::instance()->cleanup(executionNumber);
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}
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}
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VPackBuilder result;
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result.add(VPackValue("thanks"));
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generateResult(rest::ResponseCode::OK, result.slice());
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} else {
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generateError(rest::ResponseCode::METHOD_NOT_ALLOWED,
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TRI_ERROR_NOT_IMPLEMENTED, "illegal method for /_api/pregel");
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}
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} catch (std::exception const &e) {
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LOG(ERR) << e.what();
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} catch(...) {
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LOG(ERR) << "Exception";
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}
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return RestStatus::DONE;
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}
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