| /* |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package org.apache.hadoop.hbase.regionserver; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Random; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.hbase.Cell; |
| import org.apache.hadoop.hbase.CellUtil; |
| import org.apache.hadoop.hbase.HBaseTestCase; |
| import org.apache.hadoop.hbase.HBaseTestingUtility; |
| import org.apache.hadoop.hbase.HColumnDescriptor; |
| import org.apache.hadoop.hbase.HTableDescriptor; |
| import org.apache.hadoop.hbase.TableName; |
| import org.apache.hadoop.hbase.client.Durability; |
| import org.apache.hadoop.hbase.client.Put; |
| import org.apache.hadoop.hbase.client.Scan; |
| import org.apache.hadoop.hbase.testclassification.RegionServerTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.apache.hadoop.hbase.util.Bytes; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| @Category({RegionServerTests.class, SmallTests.class}) |
| public class TestWideScanner extends HBaseTestCase { |
| private static final Log LOG = LogFactory.getLog(TestWideScanner.class); |
| |
| static final byte[] A = Bytes.toBytes("A"); |
| static final byte[] B = Bytes.toBytes("B"); |
| static final byte[] C = Bytes.toBytes("C"); |
| static byte[][] COLUMNS = { A, B, C }; |
| static final Random rng = new Random(); |
| static final HTableDescriptor TESTTABLEDESC = |
| new HTableDescriptor(TableName.valueOf("testwidescan")); |
| static { |
| for (byte[] cfName : new byte[][] { A, B, C }) { |
| TESTTABLEDESC.addFamily(new HColumnDescriptor(cfName) |
| // Keep versions to help debugging. |
| .setMaxVersions(100) |
| .setBlocksize(8 * 1024) |
| ); |
| } |
| } |
| |
| /** HRegionInfo for root region */ |
| HRegion r; |
| |
| private int addWideContent(HRegion region) throws IOException { |
| int count = 0; |
| for (char c = 'a'; c <= 'c'; c++) { |
| byte[] row = Bytes.toBytes("ab" + c); |
| int i, j; |
| long ts = System.currentTimeMillis(); |
| for (i = 0; i < 100; i++) { |
| byte[] b = Bytes.toBytes(String.format("%10d", i)); |
| for (j = 0; j < 100; j++) { |
| Put put = new Put(row); |
| put.setDurability(Durability.SKIP_WAL); |
| long ts1 = ++ts; |
| put.addColumn(COLUMNS[rng.nextInt(COLUMNS.length)], b, ts1, b); |
| region.put(put); |
| count++; |
| } |
| } |
| } |
| return count; |
| } |
| |
| @Test |
| public void testWideScanBatching() throws IOException { |
| final int batch = 256; |
| try { |
| this.r = createNewHRegion(TESTTABLEDESC, null, null); |
| int inserted = addWideContent(this.r); |
| List<Cell> results = new ArrayList<Cell>(); |
| Scan scan = new Scan(); |
| scan.addFamily(A); |
| scan.addFamily(B); |
| scan.addFamily(C); |
| scan.setMaxVersions(100); |
| scan.setBatch(batch); |
| InternalScanner s = r.getScanner(scan); |
| int total = 0; |
| int i = 0; |
| boolean more; |
| do { |
| more = s.next(results); |
| i++; |
| LOG.info("iteration #" + i + ", results.size=" + results.size()); |
| |
| // assert that the result set is no larger |
| assertTrue(results.size() <= batch); |
| |
| total += results.size(); |
| |
| if (results.size() > 0) { |
| // assert that all results are from the same row |
| byte[] row = CellUtil.cloneRow(results.get(0)); |
| for (Cell kv: results) { |
| assertTrue(Bytes.equals(row, CellUtil.cloneRow(kv))); |
| } |
| } |
| |
| results.clear(); |
| |
| // trigger ChangedReadersObservers |
| Iterator<KeyValueScanner> scanners = |
| ((HRegion.RegionScannerImpl)s).storeHeap.getHeap().iterator(); |
| while (scanners.hasNext()) { |
| StoreScanner ss = (StoreScanner)scanners.next(); |
| ss.updateReaders(new ArrayList<StoreFile>()); |
| } |
| } while (more); |
| |
| // assert that the scanner returned all values |
| LOG.info("inserted " + inserted + ", scanned " + total); |
| assertEquals(total, inserted); |
| |
| s.close(); |
| } finally { |
| HBaseTestingUtility.closeRegionAndWAL(this.r); |
| } |
| } |
| |
| } |
| |