Package org.apache.cassandra.io.sstable

Examples of org.apache.cassandra.io.sstable.SSTableScanner

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        }

        // sstables
        for (SSTableReader sstable : sstables)
        {
            final SSTableScanner scanner = sstable.getScanner(RANGE_FILE_BUFFER_SIZE, filter);
            scanner.seekTo(startWith);
            assert scanner instanceof Closeable; // otherwise we leak FDs
            iterators.add(scanner);
        }

        Iterator<IColumnIterator> collated = IteratorUtils.collatedIterator(COMPARE_BY_KEY, iterators);
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            iterators.add(new ConvertToColumnIterator(filter, memtable.getEntryIterator(startWith, stopAt)));
        }

        for (SSTableReader sstable : sstables)
        {
            final SSTableScanner scanner = sstable.getScanner(filter);
            scanner.seekTo(startWith);
            assert scanner instanceof Closeable; // otherwise we leak FDs
            iterators.add(scanner);
        }

        // reduce rows from all sources into a single row
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        CompactionManager.instance.performMaximal(cfs);
        assertEquals(1, cfs.getSSTables().size());

        // check that the shadowed column is gone
        SSTableReader sstable = cfs.getSSTables().iterator().next();
        SSTableScanner scanner = sstable.getScanner(new QueryFilter(null, new QueryPath("Super1", scName), new IdentityQueryFilter()));
        scanner.seekTo(key);
        OnDiskAtomIterator iter = scanner.next();
        assertEquals(key, iter.getKey());
        SuperColumn sc = (SuperColumn) iter.next();
        assert sc.getSubColumns().isEmpty();
    }
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     * @throws IOException on failure to read/write input/output
     */
    public static void export(Descriptor desc, PrintStream outs, Collection<String> toExport, String[] excludes) throws IOException
    {
        SSTableReader reader = SSTableReader.open(desc);
        SSTableScanner scanner = reader.getDirectScanner();

        IPartitioner<?> partitioner = reader.partitioner;

        if (excludes != null)
            toExport.removeAll(Arrays.asList(excludes));

        outs.println("[");

        int i = 0;

        // last key to compare order
        DecoratedKey lastKey = null;

        for (String key : toExport)
        {
            DecoratedKey decoratedKey = partitioner.decorateKey(hexToBytes(key));

            if (lastKey != null && lastKey.compareTo(decoratedKey) > 0)
                throw new IOException("Key out of order! " + lastKey + " > " + decoratedKey);

            lastKey = decoratedKey;

            scanner.seekTo(decoratedKey);

            if (!scanner.hasNext())
                continue;

            SSTableIdentityIterator row = (SSTableIdentityIterator) scanner.next();
            if (!row.getKey().equals(decoratedKey))
                continue;

            serializeRow(row, decoratedKey, outs);

            if (i != 0)
                outs.println(",");

            i++;
        }

        outs.println("\n]");
        outs.flush();

        scanner.close();
    }
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        if (excludes != null)
            excludeSet = new HashSet<String>(Arrays.asList(excludes));


        SSTableIdentityIterator row;
        SSTableScanner scanner = reader.getDirectScanner();

        outs.println("[");

        int i = 0;

        // collecting keys to export
        while (scanner.hasNext())
        {
            row = (SSTableIdentityIterator) scanner.next();

            String currentKey = bytesToHex(row.getKey().key);

            if (excludeSet.contains(currentKey))
                continue;
            else if (i != 0)
                outs.println(",");

            serializeRow(row, row.getKey(), outs);

            i++;
        }

        outs.println("\n]");
        outs.flush();

        scanner.close();
    }
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            iterators.add(new ConvertToColumnIterator(filter, memtable.getEntryIterator(startWith, stopAt)));
        }

        for (SSTableReader sstable : sstables)
        {
            final SSTableScanner scanner = sstable.getScanner(filter);
            scanner.seekTo(startWith);
            iterators.add(scanner);
        }

        // reduce rows from all sources into a single row
        return MergeIterator.get(iterators, COMPARE_BY_KEY, new MergeIterator.Reducer<IColumnIterator, Row>()
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     * @throws IOException on failure to read/write input/output
     */
    public static void export(Descriptor desc, PrintStream outs, Collection<String> toExport, String[] excludes) throws IOException
    {
        SSTableReader reader = SSTableReader.open(desc);
        SSTableScanner scanner = reader.getDirectScanner(null);

        IPartitioner<?> partitioner = reader.partitioner;

        if (excludes != null)
            toExport.removeAll(Arrays.asList(excludes));

        outs.println("[");

        int i = 0;

        // last key to compare order
        DecoratedKey lastKey = null;

        for (String key : toExport)
        {
            DecoratedKey decoratedKey = partitioner.decorateKey(hexToBytes(key));

            if (lastKey != null && lastKey.compareTo(decoratedKey) > 0)
                throw new IOException("Key out of order! " + lastKey + " > " + decoratedKey);

            lastKey = decoratedKey;

            scanner.seekTo(decoratedKey);

            if (!scanner.hasNext())
                continue;

            SSTableIdentityIterator row = (SSTableIdentityIterator) scanner.next();
            if (!row.getKey().equals(decoratedKey))
                continue;

            serializeRow(row, decoratedKey, outs);

            if (i != 0)
                outs.println(",");

            i++;
        }

        outs.println("\n]");
        outs.flush();

        scanner.close();
    }
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        if (excludes != null)
            excludeSet = new HashSet<String>(Arrays.asList(excludes));


        SSTableIdentityIterator row;
        SSTableScanner scanner = reader.getDirectScanner(null);

        outs.println("[");

        int i = 0;

        // collecting keys to export
        while (scanner.hasNext())
        {
            row = (SSTableIdentityIterator) scanner.next();

            String currentKey = bytesToHex(row.getKey().key);

            if (excludeSet.contains(currentKey))
                continue;
            else if (i != 0)
                outs.println(",");

            serializeRow(row, row.getKey(), outs);

            i++;
        }

        outs.println("\n]");
        outs.flush();

        scanner.close();
    }
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        assertEquals(2, store.getSSTables().size());
        int repairedKeys = 0;
        int nonRepairedKeys = 0;
        for (SSTableReader sstable : store.getSSTables())
        {
            SSTableScanner scanner = sstable.getScanner();
            while (scanner.hasNext())
            {
                SSTableIdentityIterator row = (SSTableIdentityIterator) scanner.next();
                if (sstable.isRepaired())
                {
                    assertTrue(range.contains(row.getKey().getToken()));
                    repairedKeys++;
                }
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        assertEquals(1, cfs.getSSTables().size());

        // check that the shadowed column is gone
        SSTableReader sstable = cfs.getSSTables().iterator().next();
        Range keyRange = new Range<RowPosition>(key, sstable.partitioner.getMinimumToken().maxKeyBound());
        SSTableScanner scanner = sstable.getScanner(DataRange.forKeyRange(keyRange));
        OnDiskAtomIterator iter = scanner.next();
        assertEquals(key, iter.getKey());
        assert iter.next() instanceof RangeTombstone;
        assert !iter.hasNext();
    }
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Related Classes of org.apache.cassandra.io.sstable.SSTableScanner

  • org.apache.cassandra.db.columniterator.IColumnIteratorFactory
  • org.apache.cassandra.db.columniterator.LazyColumnIterator
  • org.apache.cassandra.db.compaction.AntiCompactionTest
  • org.apache.cassandra.db.compaction.CompactionsTest
  • org.apache.cassandra.db.compaction.TTLExpiryTest
  • org.apache.cassandra.db.DecoratedKey
  • org.apache.cassandra.db.RowIndexEntry
  • org.apache.cassandra.db.RowIteratorFactory
  • org.apache.cassandra.io.util.BufferedRandomAccessFile
  • org.apache.cassandra.tools.SSTableExport
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