示例#1
0
        private DataSet DeserializeMetadata(byte[] buffer)
        {
            CompressionModes compressionModes = (CompressionModes)(m_operationalModes & OperationalModes.CompressionModeMask);
            bool useCommonSerializationFormat = (m_operationalModes & OperationalModes.UseCommonSerializationFormat) > 0;
            bool compressMetadata = (m_operationalModes & OperationalModes.CompressMetadata) > 0;
            Ticks startTime = DateTime.UtcNow.Ticks;

            DataSet deserializedMetadata;
            GZipStream inflater = null;

            if (compressMetadata && compressionModes.HasFlag(CompressionModes.GZip))
            {
                try
                {
                    // Insert compressed data into compressed buffer
                    using (MemoryStream compressedData = new MemoryStream(buffer))
                    {
                        inflater = new GZipStream(compressedData, CompressionMode.Decompress, true);
                        buffer = inflater.ReadStream();
                    }
                }
                finally
                {
                    if ((object)inflater != null)
                        inflater.Close();
                }
            }

            if (useCommonSerializationFormat)
            {
                // Copy decompressed data into encoded buffer
                using (MemoryStream encodedData = new MemoryStream(buffer))
                using (XmlTextReader xmlReader = new XmlTextReader(encodedData))
                {
                    // Read encoded data into data set as XML
                    deserializedMetadata = new DataSet();
                    deserializedMetadata.ReadXml(xmlReader, XmlReadMode.ReadSchema);
                }
            }
            else
            {
                deserializedMetadata = Serialization.Deserialize<DataSet>(buffer, SerializationFormat.Binary);
            }

            long rowCount = deserializedMetadata.Tables.Cast<DataTable>().Select(dataTable => (long)dataTable.Rows.Count).Sum();

            if (rowCount > 0)
            {
                Time elapsedTime = (DateTime.UtcNow.Ticks - startTime).ToSeconds();
                OnStatusMessage("Received a total of {0:N0} records spanning {1:N0} tables of meta-data that was {2}deserialized in {3}...", rowCount, deserializedMetadata.Tables.Count, compressMetadata ? "uncompressed and " : "", elapsedTime.ToString(2));
            }

            return deserializedMetadata;
        }
示例#2
0
        private DataSet DeserializeMetadata(byte[] buffer)
        {
            GatewayCompressionMode gatewayCompressionMode = (GatewayCompressionMode)(m_operationalModes & OperationalModes.CompressionModeMask);
            bool useCommonSerializationFormat = (m_operationalModes & OperationalModes.UseCommonSerializationFormat) > 0;
            bool compressMetadata = (m_operationalModes & OperationalModes.CompressMetadata) > 0;

            DataSet deserializedMetadata;

            MemoryStream compressedData = null;
            GZipStream inflater = null;

            MemoryStream encodedData = null;
            XmlTextReader unicodeReader = null;

            if (compressMetadata && gatewayCompressionMode == GatewayCompressionMode.GZip)
            {
                try
                {
                    // Insert compressed data into compressed buffer
                    compressedData = new MemoryStream(buffer);
                    inflater = new GZipStream(compressedData, CompressionMode.Decompress);
                    buffer = inflater.ReadStream();
                }
                finally
                {
                    if ((object)inflater != null)
                        inflater.Close();

                    if ((object)compressedData != null)
                        compressedData.Close();
                }
            }

            if (useCommonSerializationFormat)
            {
                try
                {
                    // Copy decompressed data into encoded buffer
                    encodedData = new MemoryStream(buffer);

                    // Read encoded data into data set as XML
                    unicodeReader = new XmlTextReader(encodedData);
                    deserializedMetadata = new DataSet();
                    deserializedMetadata.ReadXml(unicodeReader, XmlReadMode.ReadSchema);
                }
                finally
                {
                    if ((object)unicodeReader != null)
                        unicodeReader.Close();

                    if ((object)encodedData != null)
                        encodedData.Close();
                }
            }
            else
            {
                deserializedMetadata = Serialization.Deserialize<DataSet>(buffer, TVA.SerializationFormat.Binary);
            }

            return deserializedMetadata;
        }
示例#3
0
        private SignalIndexCache DeserializeSignalIndexCache(byte[] buffer)
        {
            CompressionModes compressionModes = (CompressionModes)(m_operationalModes & OperationalModes.CompressionModeMask);
            bool useCommonSerializationFormat = (m_operationalModes & OperationalModes.UseCommonSerializationFormat) > 0;
            bool compressSignalIndexCache = (m_operationalModes & OperationalModes.CompressSignalIndexCache) > 0;

            SignalIndexCache deserializedCache;

            GZipStream inflater = null;

            if (compressSignalIndexCache && compressionModes.HasFlag(CompressionModes.GZip))
            {
                try
                {
                    using (MemoryStream compressedData = new MemoryStream(buffer))
                    {
                        inflater = new GZipStream(compressedData, CompressionMode.Decompress, true);
                        buffer = inflater.ReadStream();
                    }
                }
                finally
                {
                    if ((object)inflater != null)
                        inflater.Close();
                }
            }

            if (useCommonSerializationFormat)
            {
                deserializedCache = new SignalIndexCache();
                deserializedCache.Encoding = m_encoding;
                deserializedCache.ParseBinaryImage(buffer, 0, buffer.Length);
            }
            else
            {
                deserializedCache = Serialization.Deserialize<SignalIndexCache>(buffer, SerializationFormat.Binary);
            }

            return deserializedCache;
        }
示例#4
0
        private SignalIndexCache DeserializeSignalIndexCache(byte[] buffer)
        {
            GatewayCompressionMode gatewayCompressionMode = (GatewayCompressionMode)(m_operationalModes & OperationalModes.CompressionModeMask);
            bool useCommonSerializationFormat = (m_operationalModes & OperationalModes.UseCommonSerializationFormat) > 0;
            bool compressSignalIndexCache = (m_operationalModes & OperationalModes.CompressSignalIndexCache) > 0;

            SignalIndexCache deserializedCache;

            MemoryStream compressedData = null;
            GZipStream inflater = null;

            if (compressSignalIndexCache && gatewayCompressionMode == GatewayCompressionMode.GZip)
            {
                try
                {
                    compressedData = new MemoryStream(buffer);
                    inflater = new GZipStream(compressedData, CompressionMode.Decompress);
                    buffer = inflater.ReadStream();
                }
                finally
                {
                    if ((object)inflater != null)
                        inflater.Close();

                    if ((object)compressedData != null)
                        compressedData.Close();
                }
            }

            if (useCommonSerializationFormat)
            {
                deserializedCache = new SignalIndexCache();
                deserializedCache.Encoding = m_encoding;
                deserializedCache.ParseBinaryImage(buffer, 0, buffer.Length);
            }
            else
            {
                deserializedCache = Serialization.Deserialize<SignalIndexCache>(buffer, TVA.SerializationFormat.Binary);
            }

            return deserializedCache;
        }