mirror of https://gitee.com/bigwinds/arangodb
87 lines
2.8 KiB
C++
87 lines
2.8 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2014-2016 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 Michael Hackstein
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////////////////////////////////////////////////////////////////////////////////
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#include "Graphs.h"
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#include "Aql/Graphs.h"
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#include "Basics/StaticStrings.h"
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#include "Cluster/ClusterMethods.h"
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#include "Utils/OperationOptions.h"
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#include "Utils/SingleCollectionTransaction.h"
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#include "Transaction/Context.h"
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#include <sstream>
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using namespace arangodb;
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#ifndef USE_ENTERPRISE
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std::string const GRAPHS = "_graphs";
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////////////////////////////////////////////////////////////////////////////////
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/// @brief Load a graph from the _graphs collection; local and coordinator way
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////////////////////////////////////////////////////////////////////////////////
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arangodb::aql::Graph* arangodb::lookupGraphByName(std::shared_ptr<transaction::Context> transactionContext,
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std::string const& name) {
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SingleCollectionTransaction trx(transactionContext, GRAPHS, AccessMode::Type::READ);
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Result res = trx.begin();
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if (!res.ok()) {
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std::stringstream ss;
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ss << "while looking up graph '" << name << "': " << res.errorMessage();
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res.reset(res.errorNumber(), ss.str());
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THROW_ARANGO_EXCEPTION(res);
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}
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VPackBuilder b;
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{
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VPackObjectBuilder guard(&b);
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b.add(StaticStrings::KeyString, VPackValue(name));
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}
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// Default options are enough here
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OperationOptions options;
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OperationResult result = trx.document(GRAPHS, b.slice(), options);
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// Commit or abort.
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res = trx.finish(result.result);
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if (result.fail()) {
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THROW_ARANGO_EXCEPTION_FORMAT(result.errorNumber(), "while looking up graph '%s'",
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name.c_str());
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}
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if (res.fail()) {
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std::stringstream ss;
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ss << "while looking up graph '" << name << "': " << res.errorMessage();
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res.reset(res.errorNumber(), ss.str());
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THROW_ARANGO_EXCEPTION(res);
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}
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VPackSlice info = result.slice();
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if (info.isExternal()) {
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info = info.resolveExternal();
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}
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return new arangodb::aql::Graph(info);
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}
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#endif
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