Examples with SerializerManager io.mycat.memory.unsafe.storage.SerializerManager used on opensource projects

Example 1 with SerializerManager

use of io.mycat.memory.unsafe.storage.SerializerManager in project Mycat-Server by MyCATApache.

the class UnsafeExternalRowSorterTest method testUnsafeExternalRowSorter.

/**
     * 测试类型 LONG，INT，SHORT,Float，Double，String，Binary
     * 经测试基数排序可以适用上述数据类型，大大提高排序速度

     */
@Test
public void testUnsafeExternalRowSorter() throws NoSuchFieldException, IllegalAccessException, IOException {
    MyCatMemory myCatMemory = new MyCatMemory();
    MemoryManager memoryManager = myCatMemory.getResultMergeMemoryManager();
    DataNodeDiskManager blockManager = myCatMemory.getBlockManager();
    SerializerManager serializerManager = myCatMemory.getSerializerManager();
    MycatPropertyConf conf = myCatMemory.getConf();
    DataNodeMemoryManager dataNodeMemoryManager = new DataNodeMemoryManager(memoryManager, Thread.currentThread().getId());
    /**
         * 1.schema ,模拟一个field字段值
         *
         */
    int fieldCount = 3;
    ColMeta colMeta = null;
    Map<String, ColMeta> colMetaMap = new HashMap<String, ColMeta>(fieldCount);
    colMeta = new ColMeta(0, ColMeta.COL_TYPE_STRING);
    colMetaMap.put("id", colMeta);
    colMeta = new ColMeta(1, ColMeta.COL_TYPE_STRING);
    colMetaMap.put("name", colMeta);
    colMeta = new ColMeta(2, ColMeta.COL_TYPE_STRING);
    colMetaMap.put("age", colMeta);
    OrderCol[] orderCols = new OrderCol[1];
    OrderCol orderCol = new OrderCol(colMetaMap.get("id"), OrderCol.COL_ORDER_TYPE_ASC);
    orderCols[0] = orderCol;
    /**
         * 2 .PrefixComputer
         */
    StructType schema = new StructType(colMetaMap, fieldCount);
    schema.setOrderCols(orderCols);
    UnsafeExternalRowSorter.PrefixComputer prefixComputer = new RowPrefixComputer(schema);
    /**
         * 3 .PrefixComparator 默认是ASC，可以选择DESC
         */
    final PrefixComparator prefixComparator = PrefixComparators.LONG;
    UnsafeExternalRowSorter sorter = new UnsafeExternalRowSorter(dataNodeMemoryManager, myCatMemory, schema, prefixComparator, prefixComputer, conf.getSizeAsBytes("mycat.buffer.pageSize", "1m"), true, /**使用基数排序？true or false*/
    true);
    UnsafeRow unsafeRow;
    BufferHolder bufferHolder;
    UnsafeRowWriter unsafeRowWriter;
    String line = "testUnsafeRow";
    // List<Float> floats = new ArrayList<Float>();
    List<Long> longs = new ArrayList<Long>();
    final Random rand = new Random(42);
    for (int i = 0; i < TEST_SIZE; i++) {
        unsafeRow = new UnsafeRow(3);
        bufferHolder = new BufferHolder(unsafeRow);
        unsafeRowWriter = new UnsafeRowWriter(bufferHolder, 3);
        bufferHolder.reset();
        String key = getRandomString(rand.nextInt(300) + 100);
        //long v = rand.nextLong();
        // longs.add(v);
        unsafeRowWriter.write(0, key.getBytes());
        // unsafeRowWriter.write(0, BytesTools.toBytes(v));
        unsafeRowWriter.write(1, line.getBytes());
        unsafeRowWriter.write(2, ("35" + 1).getBytes());
        unsafeRow.setTotalSize(bufferHolder.totalSize());
        sorter.insertRow(unsafeRow);
    }
    Iterator<UnsafeRow> iter = sorter.sort();
    /*
         float [] com = new float[floats.size()];
        for (int i = 0; i <floats.size() ; i++) {
                com[i] = floats.get(i);
        }
        Arrays.sort(com);


        long[] com = new long[longs.size()];
        for (int i = 0; i < longs.size() ; i++) {
            com[i] = longs.get(i);
        }

        Arrays.sort(com);
        */
    UnsafeRow row = null;
    int indexprint = 0;
    while (iter.hasNext()) {
        row = iter.next();
        // LOGGER.error(indexprint + "    " +  row.getUTF8String(0));
        //Assert.assertEquals(com[indexprint],
        //        BytesTools.toLong(row.getBinary(0)));
        // Double c = Double.parseDouble(String.valueOf(com[indexprint])) ;
        // Double c1 = Double.parseDouble(String.valueOf(BytesTools.toFloat(row.getBinary(0)))) ;
        //  Assert.assertEquals(0,c.compareTo(c1));
        indexprint++;
    }
    Assert.assertEquals(TEST_SIZE, indexprint);
}