/** * Unfortunately, the easiest way to test this is to spin up a mini-cluster since we want to do * the usual compaction mechanism on the region, rather than going through the backdoor to the * region */ @Test public void testRegionObserverCompactionTimeStacking() throws Exception { // setup a mini cluster so we can do a real compaction on a region Configuration conf = UTIL.getConfiguration(); conf.setClass(HConstants.REGION_IMPL, CompactionCompletionNotifyingRegion.class, HRegion.class); conf.setInt("hbase.hstore.compaction.min", 2); UTIL.startMiniCluster(); String tableName = "testRegionObserverCompactionTimeStacking"; byte[] ROW = Bytes.toBytes("testRow"); byte[] A = Bytes.toBytes("A"); HTableDescriptor desc = new HTableDescriptor(TableName.valueOf(tableName)); desc.addFamily(new HColumnDescriptor(A)); desc.addCoprocessor(EmptyRegionObsever.class.getName(), null, Coprocessor.PRIORITY_USER, null); desc.addCoprocessor( NoDataFromCompaction.class.getName(), null, Coprocessor.PRIORITY_HIGHEST, null); Admin admin = UTIL.getHBaseAdmin(); admin.createTable(desc); Table table = UTIL.getConnection().getTable(desc.getTableName()); // put a row and flush it to disk Put put = new Put(ROW); put.add(A, A, A); table.put(put); HRegionServer rs = UTIL.getRSForFirstRegionInTable(desc.getTableName()); List<HRegion> regions = rs.getOnlineRegions(desc.getTableName()); assertEquals("More than 1 region serving test table with 1 row", 1, regions.size()); HRegion region = regions.get(0); admin.flushRegion(region.getRegionName()); CountDownLatch latch = ((CompactionCompletionNotifyingRegion) region).getCompactionStateChangeLatch(); // put another row and flush that too put = new Put(Bytes.toBytes("anotherrow")); put.add(A, A, A); table.put(put); admin.flushRegion(region.getRegionName()); // run a compaction, which normally would should get rid of the data // wait for the compaction checker to complete latch.await(); // check both rows to ensure that they aren't there Get get = new Get(ROW); Result r = table.get(get); assertNull( "Got an unexpected number of rows - no data should be returned with the NoDataFromScan coprocessor. Found: " + r, r.listCells()); get = new Get(Bytes.toBytes("anotherrow")); r = table.get(get); assertNull( "Got an unexpected number of rows - no data should be returned with the NoDataFromScan coprocessor Found: " + r, r.listCells()); table.close(); UTIL.shutdownMiniCluster(); }