/** * internal method to add a new data block record * * @param raf * @param startIp * @param endIp * @param region data */ private void addDataBlock( RandomAccessFile raf, String startIp, String endIp, String region) { try { byte[] data = region.getBytes("UTF-8"); int dataPtr = 0; /*byte[] city = new byte[4]; * int city_id = getCityId(region); * Util.writeIntLong(city, 0, city_id); * dataPtr = (int)raf.getFilePointer(); * raf.write(city); * raf.write(data);*/ //check region ptr pool first if (regionPtrPool.containsKey(region)) { DataBlock dataBlock = regionPtrPool.get(region); dataPtr = dataBlock.getDataPtr(); Console.WriteLine("dataPtr: " + dataPtr + ", region: " + region); } else { byte[] city = new byte[4]; int city_id = getCityId(region); Util.writeIntLong(city, 0, city_id); dataPtr = (int)raf.getFilePointer(); raf.write(city); raf.write(data); regionPtrPool.put(region, new DataBlock(city_id, region, dataPtr)); } //add the data index blocks IndexBlock ib = new IndexBlock( Util.ip2long(startIp), Util.ip2long(endIp), dataPtr, data.Length + 4 //4 bytes for the city id ); indexPool.add(ib); } catch (Exception e) { Console.WriteLine(e); } }
/** * make the Db file * * @param dbFile target output file path * @ */ public void make(String dbFile) { //check and load the gloabl region if (globalRegionFile != null) { Console.WriteLine("+-Try to load the global region data ..."); BufferedReader greader = new BufferedReader(new FileReader(globalRegionFile)); String gline = null; while ((gline = greader.readLine()) != null) { String[] p = gline.split(","); if (p.Length != 5) { continue; } //push the mapping globalRegionMap.put(p[2], Int32.Parse(p[0])); } greader.close(); Console.WriteLine("|--[Ok]"); } //alloc the header size BufferedReader reader = new BufferedReader(new FileReader(this.ipSrcFile)); RandomAccessFile raf = new RandomAccessFile(dbFile, "rw"); //init the db file initDbFile(raf); Console.WriteLine("+-Db file initialized."); //analysis main loop Console.WriteLine("+-Try to write the data blocks ... "); String line = null; while ((line = reader.readLine()) != null) { line = line.trim(); if (line.length() == 0) { continue; } if (line.charAt(0) == '#') { continue; } //1. get the start ip int sIdx = 0, eIdx = 0; if ((eIdx = line.indexOf('|', sIdx + 1)) == -1) { continue; } String startIp = line.substring(sIdx, eIdx); //2. get the end ip sIdx = eIdx + 1; if ((eIdx = line.indexOf('|', sIdx + 1)) == -1) { continue; } String endIp = line.substring(sIdx, eIdx); //3. get the region sIdx = eIdx + 1; String region = line.substring(sIdx); Console.WriteLine("+-Try to process item " + line); addDataBlock(raf, startIp, endIp, region); Console.WriteLine("|--[Ok]"); } Console.WriteLine("|--Data block flushed!"); Console.WriteLine("|--Data file pointer: " + raf.getFilePointer() + "\n"); //write the index bytes Console.WriteLine("+-Try to write index blocks ... "); //record the start block IndexBlock indexBlock = null; HeaderBlock hb = null; indexBlock = indexPool.getFirst(); long indexStartIp = indexBlock.getStartIp(), indexStratPtr = raf.getFilePointer(), indexEndPtr; headerPool.add(new HeaderBlock(indexStartIp, (int)(indexStratPtr))); int blockLength = IndexBlock.getIndexBlockLength(); int counter = 0, shotCounter = (dbConfig.getIndexBlockSize() / blockLength) - 1; //var indexIt = indexPool.iterator(); //while (indexIt.hasNext()) foreach (var indexIt in indexPool.iterator()) { indexBlock = indexIt; if (++counter >= shotCounter) { hb = new HeaderBlock( indexBlock.getStartIp(), (int)raf.getFilePointer() ); headerPool.add(hb); counter = 0; } //write the buffer raf.write(indexBlock.getBytes()); } //record the end block if (counter > 0) { indexBlock = indexPool.getLast(); hb = new HeaderBlock( indexBlock.getStartIp(), ((int)raf.getFilePointer()) - IndexBlock.getIndexBlockLength() ); headerPool.add(hb); } indexEndPtr = raf.getFilePointer(); Console.WriteLine("|--[Ok]"); //write the super blocks Console.WriteLine("+-Try to write the super blocks ... "); raf.seek(0L); //reset the file pointer byte[] superBuffer = new byte[8]; Util.writeIntLong(superBuffer, 0, indexStratPtr); Util.writeIntLong(superBuffer, 4, indexEndPtr - blockLength); raf.write(superBuffer); Console.WriteLine("|--[Ok]"); //write the header blocks Console.WriteLine("+-Try to write the header blocks ... "); //var headerIt = headerPool.iterator(); //while (headerIt.hasNext()) //{ // HeaderBlock headerBlock = headerIt.next(); // raf.write(headerBlock.getBytes()); //} foreach (var headerBlock in headerPool.iterator()) { raf.write(headerBlock.getBytes()); } //write the copyright and the release timestamp info Console.WriteLine("+-Try to write the copyright and release date info ... "); raf.seek(raf.length()); //Calendar cal = Calendar.getInstance(); //SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy/MM/dd"); String copyright = "Created by lionsoul at " + DateTime.Now.ToString("yyyy/MM/dd"); //dateFormat.format(cal.getTime()); var timestamp = (DateTime.Now.ToUniversalTime().Ticks - 621355968000000000) / 10000000; raf.write((Int32)timestamp); //the unix timestamp raf.write(copyright.getBytes()); Console.WriteLine("|--[Ok]"); reader.close(); raf.close(); }