Examples with ReadCommand org.apache.cassandra.db.ReadCommand used on opensource projects

Example 11 with ReadCommand

use of org.apache.cassandra.db.ReadCommand in project cassandra by apache.

the class DataResolverTest method testResolveNewCollection.

@Test
public void testResolveNewCollection() {
    EndpointsForRange replicas = makeReplicas(2);
    ReadCommand cmd = Util.cmd(cfs2, dk).withNowInSeconds(nowInSec).build();
    TestableReadRepair readRepair = new TestableReadRepair(cmd);
    DataResolver resolver = new DataResolver(cmd, plan(replicas, ALL), readRepair, nanoTime());
    long[] ts = { 100, 200 };
    // map column
    Row.Builder builder = BTreeRow.unsortedBuilder();
    builder.newRow(Clustering.EMPTY);
    DeletionTime expectedCmplxDelete = new DeletionTime(ts[0] - 1, nowInSec);
    builder.addComplexDeletion(m, expectedCmplxDelete);
    Cell<?> expectedCell = mapCell(0, 0, ts[0]);
    builder.addCell(expectedCell);
    // empty map column
    InetAddressAndPort peer1 = replicas.get(0).endpoint();
    resolver.preprocess(response(cmd, peer1, iter(PartitionUpdate.singleRowUpdate(cfm2, dk, builder.build()))));
    InetAddressAndPort peer2 = replicas.get(1).endpoint();
    resolver.preprocess(response(cmd, peer2, iter(PartitionUpdate.emptyUpdate(cfm2, dk))));
    try (PartitionIterator data = resolver.resolve()) {
        try (RowIterator rows = Iterators.getOnlyElement(data)) {
            Row row = Iterators.getOnlyElement(rows);
            assertColumns(row, "m");
            ComplexColumnData cd = row.getComplexColumnData(m);
            assertEquals(Collections.singleton(expectedCell), Sets.newHashSet(cd));
        }
    }
    Assert.assertNull(readRepair.sent.get(peer1));
    Mutation mutation = readRepair.getForEndpoint(peer2);
    Iterator<Row> rowIter = mutation.getPartitionUpdate(cfm2).iterator();
    assertTrue(rowIter.hasNext());
    Row row = rowIter.next();
    assertFalse(rowIter.hasNext());
    ComplexColumnData cd = row.getComplexColumnData(m);
    assertEquals(Sets.newHashSet(expectedCell), Sets.newHashSet(cd));
    assertEquals(expectedCmplxDelete, cd.complexDeletion());
}

Example 12 with ReadCommand

use of org.apache.cassandra.db.ReadCommand in project eiger by wlloyd.

the class ReadCallback method randomlyReadRepair.

private boolean randomlyReadRepair() {
    if (resolver instanceof RowDigestResolver) {
        assert command instanceof ReadCommand : command;
        String table = ((RowDigestResolver) resolver).table;
        String columnFamily = ((ReadCommand) command).getColumnFamilyName();
        CFMetaData cfmd = Schema.instance.getTableMetaData(table).get(columnFamily);
        return cfmd.getReadRepairChance() > FBUtilities.threadLocalRandom().nextDouble();
    }
    // we don't read repair on range scans
    return false;
}

Example 13 with ReadCommand

use of org.apache.cassandra.db.ReadCommand in project brisk by riptano.

the class TrackerManager method getCurrentJobtrackerLocation.

/**
 * Retrieves the current job tracker IP.
 *
 * @return the current job tracker IP
 * @throws TrackerManagerException
 */
public static InetAddress getCurrentJobtrackerLocation() throws TrackerManagerException {
    ReadCommand rc = new SliceByNamesReadCommand(BriskSchema.KEYSPACE_NAME, currentJobtrackerKey, cp, Arrays.asList(columnName));
    String result;
    try {
        List<Row> rows = StorageProxy.read(Arrays.asList(rc), ConsistencyLevel.QUORUM);
        IColumn col = validateAndGetColumn(rows, columnName);
        // ByteBuffer util duplicates for us the value.
        result = ByteBufferUtil.string(col.value());
        return InetAddress.getByName(result);
    } catch (NotFoundException e) {
        return null;
    } catch (Exception e) {
        throw new TrackerManagerException(e);
    }
}