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https://github.com/nestriness/cdc-file-transfer.git
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4326e972ac
The tools allow efficient and fast synchronization of large directory trees from a Windows workstation to a Linux target machine. cdc_rsync* support efficient copy of files by using content-defined chunking (CDC) to identify chunks within files that can be reused. asset_stream_manager + cdc_fuse_fs support efficient streaming of a local directory to a remote virtual file system based on FUSE. It also employs CDC to identify and reuse unchanged data chunks.
58 lines
1.9 KiB
C++
58 lines
1.9 KiB
C++
/*
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* Copyright 2022 Google LLC
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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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#ifndef DATA_STORE_GRPC_READER_H_
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#define DATA_STORE_GRPC_READER_H_
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#include "absl/status/statusor.h"
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#include "data_store/data_store_reader.h"
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#include "grpcpp/channel.h"
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#include "manifest/content_id.h"
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namespace cdc_ft {
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class AssetStreamClient;
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// Implementation of a DataStoreReader that loads chunks through gRpc
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// exclusively. Does not have any local caching.
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class GrpcReader : public DataStoreReader {
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public:
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// |channel| is a grpc channel to connect to.
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// |enable_stats| determines whether additional statistics are sent.
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GrpcReader(std::shared_ptr<grpc::Channel> channel, bool enable_stats);
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virtual ~GrpcReader();
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GrpcReader(const GrpcReader&) = delete;
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GrpcReader& operator=(const GrpcReader&) = delete;
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// Sends the IDs of all cached chunks to the workstation for statistical
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// purposes.
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absl::Status SendCachedContentIds(std::vector<ContentIdProto> content_ids);
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// DataStoreReader:
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absl::StatusOr<size_t> Get(const ContentIdProto& key, void* data,
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uint64_t size, uint64_t offset) override;
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absl::Status Get(ChunkTransferList* chunks) override;
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absl::Status Get(const ContentIdProto& key, Buffer* data) override;
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private:
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std::unique_ptr<AssetStreamClient> client_;
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};
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} // namespace cdc_ft
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#endif // DATA_STORE_GRPC_READER_H_
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