Examples with MultiVersionConcurrencyControl org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl used on opensource projects

Example 31 with MultiVersionConcurrencyControl

use of org.apache.hadoop.hbase.regionserver.MultiVersionConcurrencyControl in project hbase by apache.

the class CompressedWALTestBase method doTest.

public void doTest(TableName tableName) throws Exception {
    NavigableMap<byte[], Integer> scopes = new TreeMap<>(Bytes.BYTES_COMPARATOR);
    scopes.put(tableName.getName(), 0);
    RegionInfo regionInfo = RegionInfoBuilder.newBuilder(tableName).build();
    final int total = 1000;
    final byte[] row = Bytes.toBytes("row");
    final byte[] family = Bytes.toBytes("family");
    final byte[] value = VALUE;
    final WALFactory wals = new WALFactory(TEST_UTIL.getConfiguration(), tableName.getNameAsString());
    // Write the WAL
    final WAL wal = wals.getWAL(regionInfo);
    MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();
    for (int i = 0; i < total; i++) {
        WALEdit kvs = new WALEdit();
        kvs.add(new KeyValue(row, family, Bytes.toBytes(i), value));
        wal.appendData(regionInfo, new WALKeyImpl(regionInfo.getEncodedNameAsBytes(), tableName, System.currentTimeMillis(), mvcc, scopes), kvs);
    }
    wal.sync();
    final Path walPath = AbstractFSWALProvider.getCurrentFileName(wal);
    wals.shutdown();
    // Confirm the WAL can be read back
    WAL.Reader reader = wals.createReader(TEST_UTIL.getTestFileSystem(), walPath);
    int count = 0;
    WAL.Entry entry = new WAL.Entry();
    while (reader.next(entry) != null) {
        count++;
        List<Cell> cells = entry.getEdit().getCells();
        assertTrue("Should be one KV per WALEdit", cells.size() == 1);
        for (Cell cell : cells) {
            assertTrue("Incorrect row", Bytes.equals(cell.getRowArray(), cell.getRowOffset(), cell.getRowLength(), row, 0, row.length));
            assertTrue("Incorrect family", Bytes.equals(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyLength(), family, 0, family.length));
            assertTrue("Incorrect value", Bytes.equals(cell.getValueArray(), cell.getValueOffset(), cell.getValueLength(), value, 0, value.length));
        }
    }
    assertEquals("Should have read back as many KVs as written", total, count);
    reader.close();
}