Examples with SSTableReadsListener org.apache.cassandra.io.sstable.format.SSTableReadsListener used on opensource projects

Example 1 with SSTableReadsListener

use of org.apache.cassandra.io.sstable.format.SSTableReadsListener in project cassandra by apache.

the class PartitionRangeReadCommand method queryStorage.

@VisibleForTesting
public UnfilteredPartitionIterator queryStorage(final ColumnFamilyStore cfs, ReadExecutionController controller) {
    ColumnFamilyStore.ViewFragment view = cfs.select(View.selectLive(dataRange().keyRange()));
    Tracing.trace("Executing seq scan across {} sstables for {}", view.sstables.size(), dataRange().keyRange().getString(metadata().partitionKeyType));
    // fetch data from current memtable, historical memtables, and SSTables in the correct order.
    InputCollector<UnfilteredPartitionIterator> inputCollector = iteratorsForRange(view, controller);
    try {
        for (Memtable memtable : view.memtables) {
            // We close on exception and on closing the result returned by this method
            @SuppressWarnings("resource") Memtable.MemtableUnfilteredPartitionIterator iter = memtable.makePartitionIterator(columnFilter(), dataRange());
            controller.updateMinOldestUnrepairedTombstone(iter.getMinLocalDeletionTime());
            inputCollector.addMemtableIterator(RTBoundValidator.validate(iter, RTBoundValidator.Stage.MEMTABLE, false));
        }
        SSTableReadsListener readCountUpdater = newReadCountUpdater();
        for (SSTableReader sstable : view.sstables) {
            // We close on exception and on closing the result returned by this method
            @SuppressWarnings("resource") UnfilteredPartitionIterator iter = sstable.getScanner(columnFilter(), dataRange(), readCountUpdater);
            inputCollector.addSSTableIterator(sstable, RTBoundValidator.validate(iter, RTBoundValidator.Stage.SSTABLE, false));
            if (!sstable.isRepaired())
                controller.updateMinOldestUnrepairedTombstone(sstable.getMinLocalDeletionTime());
        }
        // iterators can be empty for offline tools
        if (inputCollector.isEmpty())
            return EmptyIterators.unfilteredPartition(metadata());
        return checkCacheFilter(UnfilteredPartitionIterators.mergeLazily(inputCollector.finalizeIterators(cfs, nowInSec(), controller.oldestUnrepairedTombstone())), cfs);
    } catch (RuntimeException | Error e) {
        try {
            inputCollector.close();
        } catch (Exception e1) {
            e.addSuppressed(e1);
        }
        throw e;
    }
}