Examples with Cursor jetbrains.exodus.env.Cursor used on opensource projects

Example 16 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class TreeCursorNoDuplicatesTest method testGetSearchBothRange2.

@Test
public void testGetSearchBothRange2() throws IOException {
    tm = getTreeMutable().getMutableCopy();
    getTreeMutable().put(key("10"), value("v10"));
    getTreeMutable().put(key("20"), value("v20"));
    getTreeMutable().put(key("30"), value("v30"));
    getTreeMutable().put(key("40"), value("v40"));
    getTreeMutable().put(key("50"), value("v50"));
    getTreeMutable().put(key("60"), value("v60"));
    Cursor c = getTreeMutable().openCursor();
    // miss
    assertEquals(null, c.getSearchBothRange(key("01"), value("v10")));
    // found
    assertEquals(value("v10"), c.getSearchBothRange(key("10"), value("v01")));
    // miss
    assertEquals(null, c.getSearchBothRange(key("20"), value("v21")));
    // check keep prev state
    assertEquals(key("10"), c.getKey());
}

Example 17 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class TreeCursorNoDuplicatesTest method failingGetNextAndGetPrevDontInvalidateKeyValue2.

@Test
@TestFor(issues = "XD-619")
public void failingGetNextAndGetPrevDontInvalidateKeyValue2() {
    tm = createMutableTree(false, 1);
    final int treeSize = 10000;
    for (int i = 0; i < treeSize; ++i) {
        tm.put(kv(i, Integer.toString(i)));
    }
    try (Cursor cursor = tm.openCursor()) {
        ByteIterable key = null;
        while (cursor.getNext()) {
            key = cursor.getKey();
        }
        Assert.assertEquals(key(treeSize - 1), key);
        Assert.assertEquals(key(treeSize - 1), cursor.getKey());
        cursor.getNext();
        cursor.getNext();
        Assert.assertEquals(key(treeSize - 1), cursor.getKey());
        cursor.getPrev();
        Assert.assertEquals(key(treeSize - 2), cursor.getKey());
    }
    try (Cursor cursor = tm.openCursor()) {
        ByteIterable key = null;
        while (cursor.getPrev()) {
            key = cursor.getKey();
        }
        Assert.assertEquals(key(0), key);
        Assert.assertEquals(key(0), cursor.getKey());
        cursor.getPrev();
        cursor.getPrev();
        Assert.assertEquals(key(0), cursor.getKey());
        cursor.getNext();
        Assert.assertEquals(key(1), cursor.getKey());
    }
}

Example 18 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class BTreeCursorDeleteTest method testDeleteCursorNoDuplicates1.

@Test
public void testDeleteCursorNoDuplicates1() throws IOException {
    tm = createMutableTree(false, 1);
    getTreeMutable().put(kv(1, "1"));
    Cursor c = tm.openCursor();
    assertTrue(c.getNext());
    assertTrue(c.deleteCurrent());
    assertFalse(c.deleteCurrent());
    assertFalse(c.getNext());
}

Example 19 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class BTreeCursorDeleteTest method testDeleteCursorDuplicates1.

@Test
public void testDeleteCursorDuplicates1() throws IOException {
    tm = createMutableTree(true, 1);
    getTreeMutable().put(kv(1, "11"));
    getTreeMutable().put(kv(1, "12"));
    assertTrue(getTreeMutable().getRoot() instanceof BottomPageMutable);
    assertEquals(1, getTreeMutable().getRoot().getSize());
    assertTrue(getTreeMutable().getRoot().getKey(0) instanceof LeafNodeDupMutable);
    assertEquals(2, getTreeMutable().getRoot().getKey(0).getDupCount());
    Cursor c = getTreeMutable().openCursor();
    assertTrue(c.getNext());
    assertTrue(c.deleteCurrent());
    assertFalse(c.deleteCurrent());
    assertTrue(getTreeMutable().getRoot() instanceof BottomPageMutable);
    assertEquals(1, getTreeMutable().getRoot().getSize());
    assertTrue(getTreeMutable().getRoot().getKey(0) instanceof LeafNodeMutable);
    assertTrue(c.getNext());
    assertTrue(c.deleteCurrent());
    assertFalse(c.deleteCurrent());
    assertFalse(c.getNext());
}

Example 20 with Cursor

use of jetbrains.exodus.env.Cursor in project xodus by JetBrains.

the class VFSBlobVault method loadAllBlobs.

@NotNull
private static LongSet loadAllBlobs(@NotNull final PersistentEntityStoreImpl store, @NotNull final PersistentStoreTransaction txn) {
    final LongSet result = new PackedLongHashSet();
    final Transaction envTxn = txn.getEnvironmentTransaction();
    try (Cursor entityTypesCursor = store.getEntityTypesTable().getSecondIndexCursor(envTxn)) {
        while (entityTypesCursor.getNext()) {
            final int entityTypeId = IntegerBinding.compressedEntryToInt(entityTypesCursor.getKey());
            final BlobsTable blobs = store.getBlobsTable(txn, entityTypeId);
            final Store primary = blobs.getPrimaryIndex();
            try (Cursor blobsCursor = primary.openCursor(envTxn)) {
                while (blobsCursor.getNext()) {
                    final long blobId = LongBinding.compressedEntryToLong(blobsCursor.getValue());
                    result.add(blobId);
                }
            }
        }
        return result;
    }
}