Examples with DelegatingPageCursor org.neo4j.io.pagecache.impl.DelegatingPageCursor used on opensource projects

Example 1 with DelegatingPageCursor

use of org.neo4j.io.pagecache.impl.DelegatingPageCursor in project neo4j by neo4j.

the class SeekCursorTest method mustNotContinueToSecondLeafAfterFindingEndOfRangeInFirst.

@Test
public void mustNotContinueToSecondLeafAfterFindingEndOfRangeInFirst() throws Exception {
    AtomicBoolean nextCalled = new AtomicBoolean();
    PageCursor pageCursorSpy = new DelegatingPageCursor(cursor) {

        @Override
        public boolean next(long pageId) throws IOException {
            nextCalled.set(true);
            return super.next(pageId);
        }
    };
    // GIVEN
    int i = 0;
    while (i < maxKeyCount * 2) {
        if (i == maxKeyCount) {
            createRightSibling(pageCursorSpy);
        }
        append(i);
        i++;
    }
    int fromInclusive = maxKeyCount * 2 - 1;
    int toExclusive = maxKeyCount;
    // Reset
    nextCalled.set(false);
    // WHEN
    try (SeekCursor<MutableLong, MutableLong> cursor = seekCursor(fromInclusive, toExclusive, pageCursorSpy)) {
        // THEN
        assertRangeInSingleLeaf(fromInclusive, toExclusive, cursor);
    }
    assertFalse("Cursor continued to next leaf even though end of range is within first leaf", nextCalled.get());
}

Example 2 with DelegatingPageCursor

use of org.neo4j.io.pagecache.impl.DelegatingPageCursor in project neo4j by neo4j.

the class MetaDataStoreTest method setUp.

@Before
public void setUp() {
    fs = fsRule.get();
    pageCache = pageCacheRule.getPageCache(fs);
    fakePageCursorOverflow = false;
    pageCacheWithFakeOverflow = new DelegatingPageCache(pageCache) {

        @Override
        public PagedFile map(File file, int pageSize, OpenOption... openOptions) throws IOException {
            return new DelegatingPagedFile(super.map(file, pageSize, openOptions)) {

                @Override
                public PageCursor io(long pageId, int pf_flags) throws IOException {
                    return new DelegatingPageCursor(super.io(pageId, pf_flags)) {

                        @Override
                        public boolean checkAndClearBoundsFlag() {
                            return fakePageCursorOverflow | super.checkAndClearBoundsFlag();
                        }
                    };
                }
            };
        }
    };
}