Examples with CloseableIteratorWrapper org.locationtech.geowave.core.store.CloseableIteratorWrapper used on opensource projects

Example 1 with CloseableIteratorWrapper

use of org.locationtech.geowave.core.store.CloseableIteratorWrapper in project geowave by locationtech.

the class AccumuloOperations method getDataIndexResults.

public CloseableIterator<GeoWaveRow> getDataIndexResults(final short adapterId, final String... additionalAuthorizations) {
    final byte[] family = StringUtils.stringToBinary(ByteArrayUtils.shortToString(adapterId));
    // to have backwards compatibility before 1.8.0 we can assume BaseScanner is autocloseable
    final Scanner scanner;
    try {
        scanner = createScanner(DataIndexUtils.DATA_ID_INDEX.getName(), additionalAuthorizations);
        scanner.setRange(new Range());
        scanner.fetchColumnFamily(new Text(family));
        return new CloseableIteratorWrapper(new Closeable() {

            @Override
            public void close() throws IOException {
                scanner.close();
            }
        }, Streams.stream(scanner).map(entry -> DataIndexUtils.deserializeDataIndexRow(entry.getKey().getRow().getBytes(), adapterId, entry.getValue().get(), false)).iterator());
    } catch (final TableNotFoundException e) {
        LOGGER.error("unable to find data index table", e);
    }
    return new CloseableIterator.Empty<>();
}

Example 2 with CloseableIteratorWrapper

use of org.locationtech.geowave.core.store.CloseableIteratorWrapper in project geowave by locationtech.

the class AccumuloUtils method getIterator.

private static CloseableIterator<Entry<Key, Value>> getIterator(final Connector connector, final String namespace, final Index index) throws AccumuloException, AccumuloSecurityException, IOException, TableNotFoundException {
    CloseableIterator<Entry<Key, Value>> iterator = null;
    final AccumuloOptions options = new AccumuloOptions();
    final AccumuloOperations operations = new AccumuloOperations(connector, namespace, new AccumuloOptions());
    final IndexStore indexStore = new IndexStoreImpl(operations, options);
    final PersistentAdapterStore adapterStore = new AdapterStoreImpl(operations, options);
    final AdapterIndexMappingStore mappingStore = new AdapterIndexMappingStoreImpl(operations, options);
    if (indexStore.indexExists(index.getName())) {
        final ScannerBase scanner = operations.createBatchScanner(index.getName());
        ((BatchScanner) scanner).setRanges(AccumuloUtils.byteArrayRangesToAccumuloRanges(null));
        final IteratorSetting iteratorSettings = new IteratorSetting(10, "GEOWAVE_WHOLE_ROW_ITERATOR", WholeRowIterator.class);
        scanner.addScanIterator(iteratorSettings);
        final Iterator<Entry<Key, Value>> it = new IteratorWrapper(adapterStore, mappingStore, index, scanner.iterator(), new QueryFilter[] { new DedupeFilter() });
        iterator = new CloseableIteratorWrapper<>(new ScannerClosableWrapper(scanner), it);
    }
    return iterator;
}

Example 3 with CloseableIteratorWrapper

use of org.locationtech.geowave.core.store.CloseableIteratorWrapper in project geowave by locationtech.

the class CassandraReader method wrapResults.

@SuppressWarnings("unchecked")
private CloseableIterator<T> wrapResults(final CloseableIterator<CassandraRow> results, final RangeReaderParams<T> readerParams) {
    final Set<String> authorizations = Sets.newHashSet(readerParams.getAdditionalAuthorizations());
    final Iterator<GeoWaveRow> iterator = (Iterator) Streams.stream(results).filter(new ClientVisibilityFilter(authorizations)).iterator();
    return new CloseableIteratorWrapper<>(results, rowTransformer.apply(DataStoreUtils.isMergingIteratorRequired(readerParams, visibilityEnabled) ? new GeoWaveRowMergingIterator(iterator) : iterator));
}

Example 4 with CloseableIteratorWrapper

use of org.locationtech.geowave.core.store.CloseableIteratorWrapper in project geowave by locationtech.

the class BatchedRangeRead method executeQueryAsync.

public CloseableIterator<T> executeQueryAsync(final Statement... statements) {
    // first create a list of asynchronous query executions
    final List<CompletionStage<AsyncResultSet>> futures = Lists.newArrayListWithExpectedSize(statements.length);
    final BlockingQueue<Object> results = new LinkedBlockingQueue<>(MAX_BOUNDED_READS_ENQUEUED);
    new Thread(new Runnable() {

        @Override
        public void run() {
            // set it to 1 to make sure all queries are submitted in
            // the loop
            final AtomicInteger queryCount = new AtomicInteger(1);
            for (final Statement s : statements) {
                try {
                    readSemaphore.acquire();
                    final CompletionStage<AsyncResultSet> f = operations.getSession().executeAsync(s);
                    synchronized (futures) {
                        futures.add(f);
                    }
                    queryCount.incrementAndGet();
                    f.whenCompleteAsync((result, t) -> {
                        if (result != null) {
                            try {
                                final Iterator<GeoWaveRow> iterator = (Iterator) Streams.stream(ResultSets.newInstance(result)).map(row -> new CassandraRow(row)).filter(filter).iterator();
                                rowTransformer.apply(rowMerging ? new GeoWaveRowMergingIterator(iterator) : iterator).forEachRemaining(row -> {
                                    try {
                                        results.put(row);
                                    } catch (final InterruptedException e) {
                                        LOGGER.warn("interrupted while waiting to enqueue a cassandra result", e);
                                    }
                                });
                            } finally {
                                checkFinalize(queryCount, results, readSemaphore);
                            }
                        } else if (t != null) {
                            checkFinalize(queryCount, results, readSemaphore);
                            // can do logging or start counting errors.
                            if (!(t instanceof CancellationException)) {
                                LOGGER.error("Failure from async query", t);
                                throw new RuntimeException(t);
                            }
                        }
                    });
                } catch (final InterruptedException e) {
                    LOGGER.warn("Exception while executing query", e);
                    readSemaphore.release();
                }
            }
            // then decrement
            if (queryCount.decrementAndGet() <= 0) {
                // statements submitted
                try {
                    results.put(RowConsumer.POISON);
                } catch (final InterruptedException e) {
                    LOGGER.error("Interrupted while finishing blocking queue, this may result in deadlock!");
                }
            }
        }
    }, "Cassandra Query Executor").start();
    return new CloseableIteratorWrapper<T>(new Closeable() {

        @Override
        public void close() throws IOException {
            synchronized (futures) {
                for (final CompletionStage<AsyncResultSet> f : futures) {
                    f.toCompletableFuture().cancel(true);
                }
            }
        }
    }, new RowConsumer(results));
}

Example 5 with CloseableIteratorWrapper

use of org.locationtech.geowave.core.store.CloseableIteratorWrapper in project geowave by locationtech.

the class FileSystemReader method createIterator.

private CloseableIterator<T> createIterator(final FileSystemClient client, final RangeReaderParams<T> readerParams, final GeoWaveRowIteratorTransformer<T> rowTransformer, final Collection<SinglePartitionQueryRanges> ranges, final Set<String> authorizations, final boolean async) {
    final Iterator<CloseableIterator> it = Arrays.stream(ArrayUtils.toObject(readerParams.getAdapterIds())).map(adapterId -> new FileSystemQueryExecution(client, adapterId, readerParams.getInternalAdapterStore().getTypeName(adapterId), readerParams.getIndex().getName(), client.getFormat(), rowTransformer, ranges, new ClientVisibilityFilter(authorizations), DataStoreUtils.isMergingIteratorRequired(readerParams, client.isVisibilityEnabled()), async, FileSystemUtils.isGroupByRowAndIsSortByTime(readerParams, adapterId), FileSystemUtils.isSortByKeyRequired(readerParams)).results()).iterator();
    final CloseableIterator<T>[] itArray = Iterators.toArray(it, CloseableIterator.class);
    return new CloseableIteratorWrapper<>(new Closeable() {

        AtomicBoolean closed = new AtomicBoolean(false);

        @Override
        public void close() throws IOException {
            if (!closed.getAndSet(true)) {
                Arrays.stream(itArray).forEach(it -> it.close());
            }
        }
    }, Iterators.concat(itArray));
}