Examples with IteratorItem io.pravega.client.tables.IteratorItem used on opensource projects

Example 6 with IteratorItem

use of io.pravega.client.tables.IteratorItem in project pravega by pravega.

the class KeyValueTableIteratorImplTests method testGlobalIterators.

@Test
public void testGlobalIterators() {
    val pk1 = newBuffer(DEFAULT_CONFIG.getPrimaryKeyLength());
    val pk2 = newBuffer(DEFAULT_CONFIG.getPrimaryKeyLength());
    val maxIterationSize = 10;
    val c = new KeyValueTableIteratorImpl.TableKeyComparator();
    val allEntries = IntStream.range(0, maxIterationSize).mapToObj(i -> new AbstractMap.SimpleImmutableEntry<>(newBuffer(TOTAL_KEY_LENGTH), newBuffer(5))).sorted((e1, e2) -> c.compare(e1.getKey(), e2.getKey())).collect(Collectors.toList());
    val mockSegment = mock(TableSegment.class);
    when(mockSegment.keyIterator(any())).thenAnswer(arg -> {
        val iteratorArgs = (SegmentIteratorArgs) arg.getArgument(0);
        checkSegmentIteratorArgs(iteratorArgs, pk1, pk2, maxIterationSize);
        val keys = allEntries.stream().map(e -> new TableSegmentKey(Unpooled.wrappedBuffer(e.getKey()), TableSegmentKeyVersion.NO_VERSION)).collect(Collectors.toList());
        return AsyncIterator.singleton(new IteratorItem<>(keys));
    });
    when(mockSegment.entryIterator(any())).thenAnswer(arg -> {
        val iteratorArgs = (SegmentIteratorArgs) arg.getArgument(0);
        checkSegmentIteratorArgs(iteratorArgs, pk1, pk2, maxIterationSize);
        val entries = allEntries.stream().map(e -> new TableSegmentEntry(new TableSegmentKey(Unpooled.wrappedBuffer(e.getKey()), TableSegmentKeyVersion.NO_VERSION), Unpooled.wrappedBuffer(e.getValue()))).collect(Collectors.toList());
        return AsyncIterator.singleton(new IteratorItem<>(entries));
    });
    val selector = mock(SegmentSelector.class);
    when(selector.getKvt()).thenReturn(KVT);
    when(selector.getSegmentCount()).thenReturn(DEFAULT_CONFIG.getPartitionCount());
    when(selector.getAllTableSegments()).thenAnswer(arg -> IntStream.range(0, DEFAULT_CONFIG.getPartitionCount()).mapToObj(i -> mockSegment).collect(Collectors.toList()));
    val entryHelper = new TableEntryHelper(selector, DEFAULT_CONFIG);
    val b = new KeyValueTableIteratorImpl.Builder(DEFAULT_CONFIG, entryHelper, executorService()).maxIterationSize(maxIterationSize);
    // Everything up until here has been verified in the Builder unit tests (no need to do it again).
    // Create a Primary Key range iterator.
    val iterator = b.forRange(pk1, pk2);
    // Issue a Key iterator and then an Entry iterator, then collect all the results.
    val iteratorKeys = new ArrayList<TableKey>();
    iterator.keys().collectRemaining(ii -> iteratorKeys.addAll(ii.getItems())).join();
    val iteratorEntries = new ArrayList<TableEntry>();
    iterator.entries().collectRemaining(ii -> iteratorEntries.addAll(ii.getItems())).join();
    // Validate the results are as expected.
    Assert.assertEquals(allEntries.size() * DEFAULT_CONFIG.getPartitionCount(), iteratorKeys.size());
    Assert.assertEquals(allEntries.size() * DEFAULT_CONFIG.getPartitionCount(), iteratorEntries.size());
    for (int i = 0; i < allEntries.size(); i++) {
        val expected = allEntries.get(i);
        for (int p = 0; p < DEFAULT_CONFIG.getPartitionCount(); p++) {
            val actualKey = iteratorKeys.get(i * DEFAULT_CONFIG.getPartitionCount() + p);
            val actualEntry = iteratorEntries.get(i * DEFAULT_CONFIG.getPartitionCount() + p);
            Assert.assertEquals(Unpooled.wrappedBuffer(expected.getKey()), entryHelper.serializeKey(actualKey.getPrimaryKey(), actualKey.getSecondaryKey()));
            Assert.assertEquals(actualKey, actualEntry.getKey());
            Assert.assertEquals(expected.getValue(), actualEntry.getValue());
        }
    }
}