示例#1
0
        public void PersistMemoryChunks(bool isInitialVersion)
        {
            var memoryChunksToPersist = GetUnpersistedMemoryChunks();

            long   offset            = 0;
            string pathForSingleBlob = ContainedInSingleBlob ? GetPathForMemoryChunk(0) : null;

            if (ContainedInSingleBlob)
            {
                if (isInitialVersion)
                {
                    if (BlobManager.Exists(pathForSingleBlob))
                    {
                        BlobManager.Delete(pathForSingleBlob);
                    }
                    offset = 0;
                }
                else
                {
                    offset = BlobManager.GetLength(pathForSingleBlob);
                }
                BlobManager.OpenForWriting(pathForSingleBlob);
            }
            foreach (var memoryChunkToPersist in memoryChunksToPersist)
            {
                memoryChunkToPersist.LoadMemory();
                int    memoryBlockID = memoryChunkToPersist.MemoryBlockID;
                string path          = GetPathForMemoryChunk(memoryBlockID);
                if (ContainedInSingleBlob)
                {
                    BlobManager.Append(path, memoryChunkToPersist.MemoryAsLoaded.ReadOnlyMemory);
                    UpdateLoadingOffset(memoryChunkToPersist.MemoryBlockID, offset);
                    offset += memoryChunkToPersist.LoadingInfo.PreTruncationLength;
                }
                else
                {
                    BlobManager.Write(path, memoryChunkToPersist.MemoryAsLoaded.ReadOnlyMemory);
                }
                memoryChunkToPersist.IsPersisted = true;
                OnMemoryChunkPersisted(memoryBlockID);
            }
            if (ContainedInSingleBlob)
            {
                BlobManager.CloseAfterWriting(pathForSingleBlob);
            }
        }