コード例 #1
0
        public bool TryWriteValues(IEnumerable <KeyValuePair <UInt256, WriteValue <ImmutableArray <Transaction> > > > values)
        {
            using (var conn = this.OpenConnection())
                using (var trans = conn.BeginTransaction())
                    using (var cmd = conn.CreateCommand())
                    {
                        cmd.Transaction = trans;

                        cmd.CommandText = @"
                    MERGE INTO BlockTransactions
                    USING (SELECT CAST(@blockHash AS CHAR(32) CHARACTER SET OCTETS) AS BlockHash, CAST(@txIndex AS INTEGER) AS TxIndex FROM RDB$DATABASE) AS Param
                    ON (BlockTransactions.BlockHash = Param.BlockHash AND BlockTransactions.TxIndex = Param.TxIndex)
	                WHEN NOT MATCHED THEN
	                    INSERT ( BlockHash, TxIndex, TxHash, TxBytes )
	                    VALUES ( @blockHash, @txIndex, @txHash, @txBytes );"    ;

                        cmd.Parameters.Add(new FbParameter {
                            ParameterName = "@blockHash", FbDbType = FbDbType.Char, Charset = FbCharset.Octets, Size = 32
                        });
                        cmd.Parameters.Add(new FbParameter {
                            ParameterName = "@txIndex", FbDbType = FbDbType.Integer
                        });
                        cmd.Parameters.Add(new FbParameter {
                            ParameterName = "@txHash", FbDbType = FbDbType.Char, Charset = FbCharset.Octets, Size = 32
                        });
                        cmd.Parameters.Add(new FbParameter {
                            ParameterName = "@txBytes", FbDbType = FbDbType.Binary
                        });

                        foreach (var keyPair in values)
                        {
                            var blockHash = keyPair.Key;

                            cmd.Parameters["@blockHash"].Value = blockHash.ToDbByteArray();

                            for (var txIndex = 0; txIndex < keyPair.Value.Value.Length; txIndex++)
                            {
                                var tx      = keyPair.Value.Value[txIndex];
                                var txBytes = StorageEncoder.EncodeTransaction(tx);

                                cmd.Parameters["@txIndex"].Value = txIndex;
                                cmd.Parameters["@txHash"].Value  = tx.Hash.ToDbByteArray();
                                cmd.Parameters["@txBytes"].Size  = txBytes.Length;
                                cmd.Parameters["@txBytes"].Value = txBytes;

                                cmd.ExecuteNonQuery();
                            }
                        }

                        trans.Commit();

                        return(true);
                    }
        }
コード例 #2
0
        public bool TryWriteValues(IEnumerable <KeyValuePair <UInt256, WriteValue <ImmutableArray <Transaction> > > > values)
        {
            using (var conn = this.OpenConnection())
                using (var trans = conn.BeginTransaction())
                    using (var cmd = conn.CreateCommand())
                        using (var deleteCmd = conn.CreateCommand())
                        {
                            // give writes low deadlock priority, a flush can always be retried
                            using (var deadlockCmd = conn.CreateCommand())
                            {
                                deadlockCmd.Transaction = trans;
                                deadlockCmd.CommandText = "SET DEADLOCK_PRIORITY LOW";
                                deadlockCmd.ExecuteNonQuery();
                            }

                            deleteCmd.Transaction = trans;
                            cmd.Transaction       = trans;

                            deleteCmd.CommandText = @"
                    DELETE FROM BlockTransactionsChunked
                    WHERE BlockHash = @blockHash";

                            deleteCmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@blockHash", DbType = DbType.Binary, Size = 32
                            });

                            cmd.CommandText = @"
                    INSERT
                    INTO BlockTransactionsChunked ( BlockHash, MinTxIndex, MaxTxIndex, TxChunkBytes )
	                VALUES ( @blockHash, @minTxIndex, @maxTxIndex, @txChunkBytes );"    ;

                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@blockHash", DbType = DbType.Binary, Size = 32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@minTxIndex", DbType = DbType.Int32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@maxTxIndex", DbType = DbType.Int32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@txChunkBytes", DbType = DbType.Binary
                            });

                            var chunkSize    = 100.THOUSAND();
                            var maxChunkSize = 1.MILLION();
                            var chunk        = new byte[maxChunkSize];

                            foreach (var keyPair in values)
                            {
                                var blockHash = keyPair.Key;

                                deleteCmd.Parameters["@blockHash"].Value = blockHash.ToDbByteArray();
                                deleteCmd.ExecuteNonQuery();

                                cmd.Parameters["@blockHash"].Value = blockHash.ToDbByteArray();

                                var minTxIndex  = 0;
                                var maxTxIndex  = 0;
                                var chunkOffset = 0;
                                for (var txIndex = 0; txIndex < keyPair.Value.Value.Length; txIndex++)
                                {
                                    var tx      = keyPair.Value.Value[txIndex];
                                    var txBytes = StorageEncoder.EncodeTransaction(tx);

                                    if (txBytes.Length > maxChunkSize)
                                    {
                                        throw new Exception();
                                    }

                                    if (chunkOffset + txBytes.Length > chunkSize && chunkOffset > 0)
                                    {
                                        var dbChunk1 = new byte[chunkOffset];
                                        Buffer.BlockCopy(chunk, 0, dbChunk1, 0, chunkOffset);
                                        cmd.Parameters["@minTxIndex"].Value   = minTxIndex;
                                        cmd.Parameters["@maxTxIndex"].Value   = maxTxIndex;
                                        cmd.Parameters["@txChunkBytes"].Size  = dbChunk1.Length;
                                        cmd.Parameters["@txChunkBytes"].Value = dbChunk1;
                                        cmd.ExecuteNonQuery();

                                        chunkOffset = 0;
                                        minTxIndex  = txIndex;
                                    }

                                    maxTxIndex = txIndex;
                                    Buffer.BlockCopy(txBytes, 0, chunk, chunkOffset, txBytes.Length);
                                    chunkOffset += txBytes.Length;
                                }

                                var dbChunk2 = new byte[chunkOffset];
                                Buffer.BlockCopy(chunk, 0, dbChunk2, 0, chunkOffset);
                                cmd.Parameters["@minTxIndex"].Value   = minTxIndex;
                                cmd.Parameters["@maxTxIndex"].Value   = maxTxIndex;
                                cmd.Parameters["@txChunkBytes"].Size  = dbChunk2.Length;
                                cmd.Parameters["@txChunkBytes"].Value = dbChunk2;
                                cmd.ExecuteNonQuery();
                            }

                            trans.Commit();

                            return(true);
                        }
        }
コード例 #3
0
        public bool TryWriteValues(IEnumerable <KeyValuePair <UInt256, WriteValue <ImmutableArray <Transaction> > > > values)
        {
            var stopwatch = new Stopwatch();
            var count     = 0;

            try
            {
                using (var conn = this.OpenConnection())
                    using (var trans = conn.BeginTransaction())
                        using (var cmd = conn.CreateCommand())
                        {
                            cmd.Transaction = trans;

                            cmd.CommandText = @"
                        MERGE BlockTransactions AS target
                        USING (SELECT @blockHash, @txIndex) AS source (BlockHash, TxIndex)
                        ON (target.BlockHash = source.BlockHash AND target.TxIndex = source.TxIndex)
	                    WHEN NOT MATCHED THEN
	                        INSERT (BlockHash, TxIndex, TxHash, TxBytes)
	                        VALUES (@blockHash, @txIndex, @txHash, @txBytes);"    ;

                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@blockHash", DbType = DbType.Binary, Size = 32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@txIndex", DbType = DbType.Int32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@txHash", DbType = DbType.Binary, Size = 32
                            });
                            cmd.Parameters.Add(new SqlParameter {
                                ParameterName = "@txBytes", DbType = DbType.Binary
                            });

                            foreach (var keyPair in values)
                            {
                                var blockHash = keyPair.Key;

                                cmd.Parameters["@blockHash"].Value = blockHash.ToDbByteArray();

                                for (var txIndex = 0; txIndex < keyPair.Value.Value.Length; txIndex++)
                                {
                                    var tx      = keyPair.Value.Value[txIndex];
                                    var txBytes = StorageEncoder.EncodeTransaction(tx);

                                    cmd.Parameters["@txIndex"].Value = txIndex;
                                    cmd.Parameters["@txHash"].Value  = tx.Hash.ToDbByteArray();
                                    cmd.Parameters["@txBytes"].Size  = txBytes.Length;
                                    cmd.Parameters["@txBytes"].Value = txBytes;

                                    count++;
                                    cmd.ExecuteNonQuery();
                                }
                            }

                            stopwatch.Start();
                            trans.Commit();
                            stopwatch.Stop();

                            return(true);
                        }
            }
            finally
            {
                //Debug.WriteLine("flushed {0,5}: {1:#,##0.000000}s @ {2:#,##0.000}/s".Format2(count, stopwatch.ElapsedSecondsFloat(), count / stopwatch.ElapsedSecondsFloat()));
            }
        }