mirror of https://gitee.com/bigwinds/arangodb
75 lines
2.2 KiB
C++
75 lines
2.2 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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#ifndef ARANGODB_PREGEL_WORKER_CONTEXT_H
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#define ARANGODB_PREGEL_WORKER_CONTEXT_H 1
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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#include "Basics/Common.h"
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#include "Pregel/AggregatorHandler.h"
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#include "Pregel/Utils.h"
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namespace arangodb {
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namespace pregel {
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class WorkerContext {
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template <typename V, typename E, typename M>
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friend class Worker;
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uint64_t _vertexCount, _edgeCount;
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AggregatorHandler* _readAggregators;
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AggregatorHandler* _writeAggregators;
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protected:
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template <typename T>
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inline void aggregate(std::string const& name, T const& value) {
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T const* ptr = &value;
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_writeAggregators->aggregate(name, ptr);
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}
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template <typename T>
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inline const T* getAggregatedValue(std::string const& name) {
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return (T*)_readAggregators->getAggregatedValue(name);
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}
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virtual void preApplication() {}
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virtual void preGlobalSuperstep(uint64_t gss) {}
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virtual void postGlobalSuperstep(uint64_t gss) {}
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virtual void postApplication() {}
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public:
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WorkerContext()
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: _vertexCount(0),
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_edgeCount(0),
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_readAggregators(nullptr),
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_writeAggregators(nullptr) {}
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virtual ~WorkerContext() {}
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inline uint64_t vertexCount() const { return _vertexCount; }
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inline uint64_t edgeCount() const { return _edgeCount; }
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};
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} // namespace pregel
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} // namespace arangodb
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#endif
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