示例#1
0
        private bool Update2 <T>(string tablename, string key, T item, EntityTableMeta meta) where T : new()
        {
            string tablefile = GetTableFile(tablename);
            Dictionary <long, EntityTableIndexItem> arr = null;
            Tuple <long, long> offset = null;
            int indexpos = 0;

            var locker = GetKeyLocker(tablename, string.Empty);

            lock (locker)
            {
                if (!keyindexdic[tablename].TryGetValue(key, out arr))
                {
                    throw new Exception(string.Format("更新失败,key为{0}的记录数为0", key));
                }
                string keyindexfile            = GetKeyFile(tablename);
                EntityTableIndexItem indexitem = (EntityTableIndexItem)arr.Last().Value;
                using (ObjTextWriter keywriter = ObjTextWriter.CreateWriter(keyindexfile, ObjTextReaderWriterEncodeType.entitybuf))
                //ObjTextWriter keywriter = GetWriter(keyindexfile);
                {
                    indexitem.Del = true;
                    keywriter.AppendObject(indexitem);
                }

                var keyvalue = item.Eval(meta.KeyProperty);
                //var keyvalue=meta.KeyProperty.GetValueMethed(item);
                if (keyvalue == null)
                {
                    throw new Exception("key值不能为空");
                }
                var tableitem = new EntityTableItem <T>(item);
                tableitem.Flag = (byte)EntityTableItemFlag.Ok;
                using (ObjTextWriter otw = ObjTextWriter.CreateWriter(tablefile, ObjTextReaderWriterEncodeType.entitybuf))
                //ObjTextWriter otw = GetWriter(tablefile);
                {
                    offset = otw.PreAppendObject(tableitem, (s1, s2) =>
                    {
                        if (s1.Length <= indexitem.len)
                        {
                            Console.WriteLine("修改->覆盖");
                            return(otw.Override(indexitem.Offset, s1));
                        }
                        return(null);
                    });
                }


                Dictionary <long, EntityTableIndexItem> al = null;
                var keyidc = keyindexdic[tablename];
                if (!keyidc.TryGetValue(keyvalue.ToString(), out al))
                {
                    lock (keyidc)
                    {
                        if (!keyidc.TryGetValue(keyvalue.ToString(), out al))
                        {
                            al = new Dictionary <long, EntityTableIndexItem>();
                            keyidc.TryAdd(keyvalue.ToString(), al);
                        }
                    }
                }

                EntityTableIndexItem newkey = new EntityTableIndexItem
                {
                    Key    = keyvalue.ToString(),
                    Offset = offset.Item1,
                    len    = (int)(offset.Item2 - offset.Item1),
                    Del    = false
                };

                if (newkey.Offset == indexitem.Offset)
                {
                    newkey.len = indexitem.len;
                }

                arr[indexpos] = newkey;

                using (ObjTextWriter keyidxwriter = ObjTextWriter.CreateWriter(keyindexfile, ObjTextReaderWriterEncodeType.entitybuf))
                //ObjTextWriter keyidxwriter = GetWriter(keyindexfile);
                //lock(keyidxwriter)
                {
                    keyidxwriter.AppendObject(newkey);
                }

                foreach (var idx in meta.Indexs)
                {
                    string indexfile  = GetIndexFile(tablename, idx);
                    var    indexvalue = item.Eval(meta.IndexProperties[idx]);
                    var    newindex   = new EntityTableIndexItem
                    {
                        Key    = indexvalue == null ? string.Empty : indexvalue.ToString(),
                        Offset = offset.Item1,
                        len    = (int)(offset.Item2 - offset.Item1),
                        Del    = false
                    };
                    using (ObjTextWriter idxwriter = ObjTextWriter.CreateWriter(indexfile, ObjTextReaderWriterEncodeType.entitybuf))
                    //ObjTextWriter idxwriter = GetWriter(indexfile);
                    //lock(idxwriter)
                    {
                        idxwriter.AppendObject(newindex);
                    }
                }

                Console.WriteLine("写入成功:" + keyvalue + "->" + offset);
            }
            return(true);
        }
示例#2
0
        private bool Insert2 <T>(string tablename, IEnumerable <T> items, EntityTableMeta meta) where T : new()
        {
            string tablefile = GetTableFile(tablename);

            var locker = GetKeyLocker(tablename, string.Empty);

            lock (locker)
            {
                ObjTextWriter otw          = ObjTextWriter.CreateWriter(tablefile, ObjTextReaderWriterEncodeType.entitybuf);
                string        keyindexfile = GetKeyFile(tablename);
                ObjTextWriter keywriter    = ObjTextWriter.CreateWriter(keyindexfile, ObjTextReaderWriterEncodeType.entitybuf);
                Dictionary <string, ObjTextWriter> idxwriterdic = new Dictionary <string, ObjTextWriter>();

                try
                {
                    foreach (var item in items)
                    {
                        var keyvalue = item.Eval(meta.KeyProperty);
                        //var keyvalue = meta.KeyProperty.GetValueMethed(item);
                        if (keyvalue == null)
                        {
                            throw new Exception("key值不能为空");
                        }

                        var keystr = keyvalue.ToString();

                        var keylocker = GetKeyLocker(tablename, keystr);

                        Dictionary <long, EntityTableIndexItem> arr = null;
                        lock (keylocker)
                        {
                            if (keyindexdic[tablename].TryGetValue(keystr, out arr))
                            {
                                throw new Exception(string.Format("key:{0}不可重复", keystr));
                            }
                        }

                        var tableitem = new EntityTableItem <T>(item);
                        tableitem.Flag = (byte)EntityTableItemFlag.Ok;

                        //using (ObjTextWriter otw = ObjTextWriter.CreateWriter(tablefile, ObjTextReaderWriterEncodeType.entitybuf))
                        //var otw = GetWriter(tablefile);
                        //lock(otw)
                        {
                            var offset = otw.AppendObject(tableitem);

                            Dictionary <long, EntityTableIndexItem> al = null;
                            var idc = keyindexdic[tablename];
                            if (!idc.TryGetValue(keystr, out al))
                            {
                                lock (idc)
                                {
                                    if (!idc.TryGetValue(keystr, out al))
                                    {
                                        al = new Dictionary <long, EntityTableIndexItem>();
                                        idc.TryAdd(keystr, al);
                                    }
                                }
                            }

                            var newkey = new EntityTableIndexItem
                            {
                                Key    = keystr,
                                Offset = offset.Item1,
                                len    = (int)(offset.Item2 - offset.Item1)
                            };
                            lock (al)
                            {
                                al.Add(newkey.Offset, newkey);
                            }

                            //string keyindexfile = GetKeyFile(tablename);
                            //using (ObjTextWriter keywriter = ObjTextWriter.CreateWriter(keyindexfile, ObjTextReaderWriterEncodeType.entitybuf))
                            //ObjTextWriter keywriter = GetWriter(keyindexfile);
                            //lock(keywriter)
                            {
                                keywriter.AppendObject(newkey);
                            }

                            foreach (var idx in meta.Indexs)
                            {
                                string indexfile  = GetIndexFile(tablename, idx);
                                var    indexvalue = item.Eval(meta.IndexProperties[idx]);
                                var    newindex   = new EntityTableIndexItem
                                {
                                    Key    = indexvalue == null ? string.Empty : indexvalue.ToString(),
                                    Offset = offset.Item1,
                                    len    = (int)(offset.Item2 - offset.Item1)
                                };
                                //using (ObjTextWriter idxwriter = ObjTextWriter.CreateWriter(indexfile, ObjTextReaderWriterEncodeType.entitybuf))
                                //ObjTextWriter idxwriter = GetWriter(indexfile);
                                //lock(idxwriter)
                                {
                                    ObjTextWriter idxwriter = null;
                                    if (!idxwriterdic.TryGetValue(indexfile, out idxwriter))
                                    {
                                        idxwriter = ObjTextWriter.CreateWriter(indexfile, ObjTextReaderWriterEncodeType.entitybuf);
                                        idxwriterdic.Add(indexfile, idxwriter);
                                    }

                                    idxwriter.AppendObject(newindex);
                                }
                            }
                        }
                    }
                }
                finally
                {
                    otw.Dispose();
                    keywriter.Dispose();
                    foreach (var kv in idxwriterdic)
                    {
                        kv.Value.Dispose();
                    }
                }
            }

            return(true);
        }