mirror of https://gitee.com/bigwinds/arangodb
101 lines
3.5 KiB
C++
101 lines
3.5 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2019 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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#pragma once
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#ifndef ARANGOD_ROCKSDB_ENGINE_ROCKSDB_META_COLLECTION_H
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#define ARANGOD_ROCKSDB_ENGINE_ROCKSDB_META_COLLECTION_H 1
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#include "Basics/Common.h"
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#include "Basics/ReadWriteLock.h"
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#include "RocksDBEngine/RocksDBMetadata.h"
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#include "RocksDBEngine/RocksDBCommon.h"
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#include "StorageEngine/PhysicalCollection.h"
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#include "VocBase/LogicalCollection.h"
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namespace arangodb {
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class RocksDBMetaCollection : public PhysicalCollection {
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public:
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explicit RocksDBMetaCollection(LogicalCollection& collection,
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arangodb::velocypack::Slice const& info);
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RocksDBMetaCollection(LogicalCollection& collection,
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PhysicalCollection const*); // use in cluster only!!!!!
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virtual ~RocksDBMetaCollection() = default;
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std::string const& path() const override final;
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void setPath(std::string const& path) override final {}
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arangodb::Result persistProperties() override final {
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// only code path calling this causes these properties to be
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// already written in RocksDBEngine::changeCollection()
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return Result();
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}
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void open(bool /*ignoreErrors*/) override final {
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TRI_ASSERT(_objectId != 0);
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}
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void deferDropCollection(std::function<bool(LogicalCollection&)> const&) override final {}
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/// @brief report extra memory used by indexes etc.
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size_t memory() const override final { return 0; }
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uint64_t objectId() const { return _objectId; }
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RocksDBMetadata& meta() { return _meta; }
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TRI_voc_rid_t revision(arangodb::transaction::Methods* trx) const override final;
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uint64_t numberDocuments(transaction::Methods* trx) const override final;
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int lockWrite(double timeout = 0.0);
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void unlockWrite();
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int lockRead(double timeout = 0.0);
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void unlockRead();
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/// recalculte counts for collection in case of failure
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uint64_t recalculateCounts();
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/// @brief compact-data operation
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/// triggers rocksdb compaction for documentDB and indexes
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Result compact() override final;
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/// estimate size of collection and indexes
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void estimateSize(velocypack::Builder& builder);
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public:
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/// return bounds for all documents
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virtual RocksDBKeyBounds bounds() const = 0;
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protected:
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/// @brief track the usage of waitForSync option in an operation
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void trackWaitForSync(arangodb::transaction::Methods* trx, OperationOptions& options);
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protected:
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RocksDBMetadata _meta; /// collection metadata
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uint64_t const _objectId; /// rocksdb-specific object id for collection
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/// @brief collection lock used for write access
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mutable basics::ReadWriteLock _exclusiveLock;
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};
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} // namespace arangodb
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#endif
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