public void ExtendingColumnStream()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            var data = Any.BytesOfLength(4096);

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        // Write some of the data, rewind a bit and then overwrite the
                        // last few bytes and append some more data
                        stream.Write(data, 0, data.Length - 10);
                        stream.Seek(-10, SeekOrigin.End);
                        stream.Write(data, data.Length - 20, 20);
                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                Assert.AreEqual(data.Length, stream.Length);
                var retrieved = new byte[data.Length];
                Assert.AreEqual(retrieved.Length, stream.Read(retrieved, 0, retrieved.Length));
                CollectionAssert.AreEqual(data, retrieved);
            }
        }
示例#2
0
        public void Set(string name, string key, RavenJObject data, UuidType uuidType)
        {
            Api.JetSetCurrentIndex(session, Lists, "by_name_and_key");
            Api.MakeKey(session, Lists, name, Encoding.Unicode, MakeKeyGrbit.NewKey);
            Api.MakeKey(session, Lists, key, Encoding.Unicode, MakeKeyGrbit.None);

            var exists = Api.TrySeek(session, Lists, SeekGrbit.SeekEQ);


            using (var update = new Update(session, Lists, exists ? JET_prep.Replace : JET_prep.Insert))
            {
                Api.SetColumn(session, Lists, tableColumnsCache.ListsColumns["name"], name, Encoding.Unicode);
                Api.SetColumn(session, Lists, tableColumnsCache.ListsColumns["key"], key, Encoding.Unicode);
                Api.SetColumn(session, Lists, tableColumnsCache.ListsColumns["etag"], uuidGenerator.CreateSequentialUuid(uuidType).TransformToValueForEsentSorting());
                using (var columnStream = new ColumnStream(session, Lists, tableColumnsCache.ListsColumns["data"]))
                {
                    if (exists)
                    {
                        columnStream.SetLength(0);
                    }
                    using (Stream stream = new BufferedStream(columnStream))
                    {
                        data.WriteTo(stream);
                        stream.Flush();
                    }
                }
                update.Save();
            }
        }
        public void OverwriteColumnStream()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            var       data    = Any.BytesOfLength(1024);
            var       newData = Any.BytesOfLength(128);
            const int Offset  = 10;

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        stream.Write(data, 0, data.Length);
                        stream.Position = 0;
                        stream.Seek(Offset, SeekOrigin.Current);
                        stream.Write(newData, 0, newData.Length);
                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                Assert.AreEqual(data.Length, stream.Length);
                var retrieved = new byte[data.Length];
                var expected  = new byte[data.Length];
                Array.Copy(data, 0, expected, 0, data.Length);
                Array.Copy(newData, 0, expected, Offset, newData.Length);
                Assert.AreEqual(retrieved.Length, stream.Read(retrieved, 0, retrieved.Length));
                CollectionAssert.AreEqual(expected, retrieved);
            }
        }
        public void ShrinkColumnStream()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            const int Length = 1345;
            var       data   = Any.BytesOfLength(Length);

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        stream.Write(data, 0, data.Length);
                        stream.Write(data, 0, data.Length);
                        Assert.AreEqual(Length * 2, stream.Length);

                        stream.SetLength(Length);
                        Assert.AreEqual(Length, stream.Length);

                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                Assert.AreEqual(Length, stream.Length);
                var buffer = new byte[Length];
                stream.Read(buffer, 0, buffer.Length);
                CollectionAssert.AreEqual(data, buffer);
            }
        }
示例#5
0
		public Etag AddAttachment(string key, Etag etag, Stream data, RavenJObject headers)
		{
			Api.JetSetCurrentIndex(session, Files, "by_name");
			Api.MakeKey(session, Files, key, Encoding.Unicode, MakeKeyGrbit.NewKey);
			var isUpdate = Api.TrySeek(session, Files, SeekGrbit.SeekEQ);
			if (isUpdate)
			{
				var existingEtag = Etag.Parse(Api.RetrieveColumn(session, Files, tableColumnsCache.FilesColumns["etag"]));
				if (existingEtag != etag && etag != null)
				{
					throw new ConcurrencyException("PUT attempted on attachment '" + key +
						"' using a non current etag")
					{
						ActualETag = existingEtag,
						ExpectedETag = etag
					};
				}
			}
			else
			{
				if (data == null)
					throw new InvalidOperationException("When adding new attachment, the attachment data must be specified");

				if (Api.TryMoveFirst(session, Details))
					Api.EscrowUpdate(session, Details, tableColumnsCache.DetailsColumns["attachment_count"], 1);
			}

			Etag newETag = uuidGenerator.CreateSequentialUuid(UuidType.Attachments);
			using (var update = new Update(session, Files, isUpdate ? JET_prep.Replace : JET_prep.Insert))
			{
				Api.SetColumn(session, Files, tableColumnsCache.FilesColumns["name"], key, Encoding.Unicode);
				if (data != null)
				{
					long written;
					using (var columnStream = new ColumnStream(session, Files, tableColumnsCache.FilesColumns["data"]))
					{
						if (isUpdate)
							columnStream.SetLength(0);
						using (var stream = new BufferedStream(columnStream))
						{
							data.CopyTo(stream);
							written = stream.Position;
							stream.Flush();
						}
					}
					if (written == 0) // empty attachment
					{
						Api.SetColumn(session, Files, tableColumnsCache.FilesColumns["data"], new byte[0]);
					}
				}

				Api.SetColumn(session, Files, tableColumnsCache.FilesColumns["etag"], newETag.TransformToValueForEsentSorting());
				Api.SetColumn(session, Files, tableColumnsCache.FilesColumns["metadata"], headers.ToString(Formatting.None), Encoding.Unicode);

				update.Save();
			}
			logger.Debug("Adding attachment {0}", key);

			return newETag;
		}
        public void GrowColumnStreamByWritingPastEnd()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            const int Length   = 1345;
            const int Position = 1500;
            var       data     = Any.BytesOfLength(Length);

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        stream.Position = Position;
                        stream.Write(data, 0, data.Length);
                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                Assert.AreEqual(Length + Position, stream.Length);
                var expected = new byte[Length + Position];
                var actual   = new byte[Length + Position];
                Array.Copy(data, 0, expected, Position, Length);
                Assert.AreEqual(Length + Position, stream.Read(actual, 0, actual.Length));
                CollectionAssert.AreEqual(expected, actual);
            }
        }
        public void SetAndRetrieveMultiValueColumnStream()
        {
            string[] data = { Any.String, Any.String, Any.String, Any.String, Any.String, Any.String };

            Api.JetBeginTransaction(this.sesid);
            Api.JetPrepareUpdate(this.sesid, this.tableid, JET_prep.Insert);
            for (int i = 0; i < data.Length; ++i)
            {
                var column = new ColumnStream(this.sesid, this.tableid, this.columnidLongText);
                column.Itag = i + 1;
                using (var writer = new StreamWriter(column))
                {
                    writer.WriteLine(data[i]);
                }
            }

            this.UpdateAndGotoBookmark();
            Api.JetCommitTransaction(this.sesid, CommitTransactionGrbit.LazyFlush);

            for (int i = 0; i < data.Length; ++i)
            {
                var column = new ColumnStream(this.sesid, this.tableid, this.columnidLongText);
                column.Itag = i + 1;
                using (var reader = new StreamReader(column))
                {
                    string actual = reader.ReadLine();
                    Assert.AreEqual(data[i], actual);
                }
            }
        }
        public void ColumnStreamCanSerializeBasicType()
        {
            var expected = Any.Int64;

            using (var t = new Transaction(this.sesid))
                using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        var serializer = new BinaryFormatter
                        {
                            Context = new StreamingContext(StreamingContextStates.Persistence)
                        };
                        serializer.Serialize(stream, expected);
                        u.Save();
                        t.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetMove(this.sesid, this.tableid, JET_Move.First, MoveGrbit.None);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                var deseriaizer = new BinaryFormatter();
                var actual      = (long)deseriaizer.Deserialize(stream);
                Assert.AreEqual(expected, actual);
            }
        }
        public void ReadAtNonZeroOffset()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            var data = Any.BytesOfLength(1024);

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        stream.Write(data, 0, data.Length);
                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                var retrieved = new byte[data.Length * 2];
                stream.Read(retrieved, data.Length, data.Length);
                for (int i = data.Length; i < retrieved.Length; ++i)
                {
                    Assert.AreEqual(retrieved[i], data[i - data.Length]);
                }
            }
        }
示例#10
0
        public void ReadReturnsNumberOfBytesRead()
        {
            var bookmark = new byte[SystemParameters.BookmarkMost];
            int bookmarkSize;

            var data = Any.BytesOfLength(1024);

            using (var transaction = new Transaction(this.sesid))
                using (var update = new Update(this.sesid, this.tableid, JET_prep.Insert))
                    using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
                    {
                        stream.Write(data, 0, data.Length);
                        update.Save(bookmark, bookmark.Length, out bookmarkSize);
                        transaction.Commit(CommitTransactionGrbit.LazyFlush);
                    }

            Api.JetGotoBookmark(this.sesid, this.tableid, bookmark, bookmarkSize);
            using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
            {
                var retrieved = new byte[data.Length];
                stream.Seek(-1, SeekOrigin.End);
                Assert.AreEqual(1, stream.Read(retrieved, 0, retrieved.Length));
                Assert.AreEqual(data[data.Length - 1], retrieved[0]);
            }
        }
示例#11
0
        public AddDocumentResult InsertDocument(string key, RavenJObject data, RavenJObject metadata, bool checkForUpdates)
        {
            var  prep     = JET_prep.Insert;
            bool isUpdate = false;

            if (checkForUpdates)
            {
                Api.JetSetCurrentIndex(session, Documents, "by_key");
                Api.MakeKey(session, Documents, key, Encoding.Unicode, MakeKeyGrbit.NewKey);
                isUpdate = Api.TrySeek(session, Documents, SeekGrbit.SeekEQ);
                if (isUpdate)
                {
                    prep = JET_prep.Replace;
                }
            }
            using (var update = new Update(session, Documents, prep))
            {
                Api.SetColumn(session, Documents, tableColumnsCache.DocumentsColumns["key"], key, Encoding.Unicode);
                using (var columnStream = new ColumnStream(session, Documents, tableColumnsCache.DocumentsColumns["data"]))
                {
                    if (isUpdate)
                    {
                        columnStream.SetLength(0);
                    }
                    using (Stream stream = new BufferedStream(columnStream))
                        using (var finalStream = documentCodecs.Aggregate(stream, (current, codec) => codec.Encode(key, data, metadata, current)))
                        {
                            data.WriteTo(finalStream);
                            finalStream.Flush();
                        }
                }
                Guid newEtag = uuidGenerator.CreateSequentialUuid(UuidType.Documents);
                Api.SetColumn(session, Documents, tableColumnsCache.DocumentsColumns["etag"], newEtag.TransformToValueForEsentSorting());
                DateTime savedAt = SystemTime.UtcNow;
                Api.SetColumn(session, Documents, tableColumnsCache.DocumentsColumns["last_modified"], savedAt.ToBinary());

                using (var columnStream = new ColumnStream(session, Documents, tableColumnsCache.DocumentsColumns["metadata"]))
                {
                    if (isUpdate)
                    {
                        columnStream.SetLength(0);
                    }
                    using (Stream stream = new BufferedStream(columnStream))
                    {
                        metadata.WriteTo(stream);
                        stream.Flush();
                    }
                }

                update.Save();

                return(new AddDocumentResult
                {
                    Etag = newEtag,
                    SavedAt = savedAt,
                    Updated = isUpdate
                });
            }
        }
示例#12
0
 public void ColumnStreamThrowsExceptionWhenSeekOffsetIsTooLarge()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 stream.Seek(0x800000000, SeekOrigin.Begin);
             }
 }
示例#13
0
        public void ColumnStreamToString()
        {
            var value = new ColumnStream(JET_SESID.Nil, JET_TABLEID.Nil, new JET_COLUMNID {
                Value = 0x1a
            });

            value.Itag = 2;
            Assert.AreEqual("ColumnStream(0x1a:2)", value.ToString());
        }
示例#14
0
 public void SettingPositionThrowsExceptionWhenPositionIsTooLong()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 stream.Position = 0x800000000;
             }
 }
示例#15
0
 public void WriteThrowsExceptionWhenBufferIsNull()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 stream.Write(null, 0, 0);
             }
 }
示例#16
0
 public void ColumnStreamSupportsSeek()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 Assert.IsTrue(stream.CanSeek);
             }
 }
示例#17
0
 public void ColumnStreamThrowsExceptionWhenSeekOriginIsInvalid()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 stream.Seek(0x800000000, (SeekOrigin)0x1234);
             }
 }
示例#18
0
 public void ColumnStreamSetLengthThrowsExceptionWhenLengthIsNegative()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 stream.SetLength(-1);
             }
 }
示例#19
0
        public bool Initialize(String filePath, int pageSize)
        {
            this._databaseFile   = filePath;
            DatabasePageSize     = pageSize;
            VersionStorePageSize = pageSize * 2;
            _instance            = CreateEsentInstance();

            _primarySessionId = new Session(_instance);
            InitializeDatabaseAndTables();
            JET_TABLEID tableid;

            bool result = Api.TryOpenTable(_primarySessionId, _primaryDatabaseId, "Containers", OpenTableGrbit.None, out tableid);

            if (result == false)
            {
                return(false);
            }
            this.tableNameDict = new Dictionary <string, string>();

            using (var trx = new Transaction(_primarySessionId))
            {
                if (Api.TryMoveFirst(_primarySessionId, tableid))
                {
                    do
                    {
                        JET_COLUMNBASE colBaseName;
                        Api.JetGetColumnInfo(_primarySessionId, _primaryDatabaseId, "Containers", "Name", out colBaseName);
                        ColumnStream streamName = new ColumnStream(_primarySessionId, tableid, colBaseName.columnid);
                        Byte[]       dataName   = new Byte[streamName.Length];
                        streamName.Read(dataName, 0, (int)streamName.Length);
                        String tableConvertName = Encoding.Unicode.GetString(dataName).Replace("\0", string.Empty);

                        JET_COLUMNBASE colBasePartition;
                        Api.JetGetColumnInfo(_primarySessionId, _primaryDatabaseId, "Containers", "PartitionId", out colBasePartition);
                        ColumnStream streamPartition = new ColumnStream(_primarySessionId, tableid, colBasePartition.columnid);
                        Byte[]       dataPartition   = new Byte[streamPartition.Length];
                        streamPartition.Read(dataPartition, 0, (int)streamPartition.Length);
                        String tableConvertPartition = Encoding.Unicode.GetString(dataPartition).Replace("\0", string.Empty);
                        tableConvertName += "(" + tableConvertPartition + ")";

                        JET_COLUMNBASE colBaseID;
                        Api.JetGetColumnInfo(_primarySessionId, _primaryDatabaseId, "Containers", "ContainerId", out colBaseID);
                        ColumnStream streamID = new ColumnStream(_primarySessionId, tableid, colBaseID.columnid);
                        Byte[]       dataID   = new Byte[streamID.Length];
                        streamID.Read(dataID, 0, (int)streamID.Length);
                        String tableConvertID = BitConverter.ToUInt64(dataID, 0).ToString();

                        tableNameDict[tableConvertName] = tableConvertID;
                    }while (Api.TryMoveNext(_primarySessionId, tableid));
                }
                Api.JetCloseTable(_primarySessionId, tableid);
            }


            return(true);
        }
示例#20
0
        public Stream GetStream(int len, bool canSeek)
        {
            if (_columnStream == null)
            {
                _columnStream = new ColumnStream(this);
            }

            _columnStream.Init(len, canSeek);
            return(_columnStream);
        }
示例#21
0
 public void ReadThrowsExceptionWhenNumberOfBytesIsNegative()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 var buffer = new byte[10];
                 stream.Read(buffer, 0, -1);
             }
 }
示例#22
0
 public void WriteThrowsExceptionWhenBufferOffsetIsNegative()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 var buffer = new byte[10];
                 stream.Write(buffer, -1, 1);
             }
 }
示例#23
0
 public void WriteThrowsExceptionWhenNumberOfBytesIsTooLarge()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 var buffer = new byte[10];
                 stream.Write(buffer, 1, buffer.Length);
             }
 }
示例#24
0
 public void ReadThrowsExceptionWhenBufferOffsetIsTooBig()
 {
     using (var t = new Transaction(this.sesid))
         using (var u = new Update(this.sesid, this.tableid, JET_prep.Insert))
             using (var stream = new ColumnStream(this.sesid, this.tableid, this.columnidLongText))
             {
                 var buffer = new byte[10];
                 stream.Read(buffer, buffer.Length, 1);
             }
 }
示例#25
0
        private ColumnStream <T> CreateCsub <T>(ICodec <T> codec, byte[] data) where T : unmanaged
        {
            var stream = new ColumnStream <T>(
                new MinotaurMemoryStream(),
                codec,
                1024);

            stream.WriteAndReset(data, sizeof(byte));
            return(stream);
        }
示例#26
0
                static async ValueTask <int> ReadLong(ColumnStream stream, Memory <byte> buffer, CancellationToken cancellationToken = default)
                {
                    using var registration = stream._startCancellableOperations
                        ? stream._connector.StartNestedCancellableOperation(cancellationToken, attemptPgCancellation: false)
                        : default;
                    var read = await stream._buf.ReadAsync(buffer, cancellationToken);

                    stream._read += read;
                    return(read);
                }
示例#27
0
 /// <summary>Retrieve the column value from the DB.</summary>
 public override object Deserialize(EseCursorBase cur, JET_COLUMNID idColumn)
 {
     using (var stm = new ColumnStream(cur.idSession, cur.idTable, idColumn))
     {
         if (stm.Length < 1)
         {
             return(null);
         }
         using (var br = XmlDictionaryReader.CreateBinaryReader(stm, this.dict, XmlDictionaryReaderQuotas.Max))
             return(m_serializer.ReadObject(br));
     }
 }
示例#28
0
        public int InsertPage(byte[] buffer, int size)
        {
            var key = new HashKey(buffer, size);

            Api.JetSetCurrentIndex(session, Pages, "by_keys");

            Api.MakeKey(session, Pages, key.Weak, MakeKeyGrbit.NewKey);
            Api.MakeKey(session, Pages, key.Strong, MakeKeyGrbit.None);

            if (Api.TrySeek(session, Pages, SeekGrbit.SeekEQ))
            {
                Api.EscrowUpdate(session, Pages, tableColumnsCache.PagesColumns["usage_count"], 1);
                return(Api.RetrieveColumnAsInt32(session, Pages, tableColumnsCache.PagesColumns["id"]).Value);
            }

            var bookMarkBuffer = new byte[bookmarkMost];
            var actualSize     = 0;

            using (var update = new Update(session, Pages, JET_prep.Insert))
            {
                Api.SetColumn(session, Pages, tableColumnsCache.PagesColumns["page_strong_hash"], key.Strong);
                Api.SetColumn(session, Pages, tableColumnsCache.PagesColumns["page_weak_hash"], key.Weak);

                using (var columnStream = new ColumnStream(session, Pages, tableColumnsCache.PagesColumns["data"]))
                {
                    using (Stream stream = new BufferedStream(columnStream))
                        using (var finalStream = fileCodecs.Aggregate(stream, (current, codec) => codec.EncodePage(current)))
                        {
                            finalStream.Write(buffer, 0, size);
                            finalStream.Flush();
                        }
                }

                try
                {
                    update.Save(bookMarkBuffer, bookMarkBuffer.Length, out actualSize);
                }
                catch (EsentKeyDuplicateException)
                {
                    // it means that page is being inserted by another thread
                    throw new ConcurrencyException("The same file page is being created");
                }
            }

            Api.JetGotoBookmark(session, Pages, bookMarkBuffer, actualSize);

            return(Api.RetrieveColumnAsInt32(session, Pages, tableColumnsCache.PagesColumns["id"]).Value);
        }
示例#29
0
        /// <summary>Store the column value in the database.</summary>
        public override void Serialize(EseCursorBase cur, JET_COLUMNID idColumn, object value, bool bNewRecord)
        {
            using (var stm = new ColumnStream(cur.idSession, cur.idTable, idColumn))
            {
                using (XmlDictionaryWriter bw = XmlDictionaryWriter.CreateBinaryWriter(stm, this.dict))
                {
                    this.m_serializer.WriteObject(bw, value);
                    bw.Flush();
                }

                // TODO [low]: if the ( current size - new size < 4kb ), then append spaces/zeros instead of resizing the column. The comments inside the SetLength method suggest that shrinking the column is very inefficient for large values.
                if (stm.Position < stm.Length)
                {
                    stm.SetLength(stm.Position);
                }
            }
        }
示例#30
0
        public void Setup()
        {
            var data = Factory.CreateRandomBytes(WROTE);
            var ptr  = Marshal.AllocHGlobal(READ);

            _unmanagedPtr.Add(ptr);
            _rData    = (byte *)ptr;
            _readData = new byte[READ];

            _csFullClassBase = CreateCsb(new VoidCodecFullStream(), data);
            //_csTemplateCodecBase = CreateCsb(new TemplateVoidCodec(), data);
            //_csFullTemplateBase = CreateCstb(new TemplateVoidCodec(), data);
            _csFullClass   = CreateCs <byte, VoidCodec <byte> >(new VoidCodec <byte>(), data);
            _csUnsafeClass = CreateCsub <byte>(new VoidCodec <byte>(), data);
            //_csTemplateCodec1 = CreateCs(new TemplateVoidCodec(), data);
            //_csFullTemplateCodec = CreateCst(new TemplateVoidCodec(), data);
        }