Examples with PageCursor org.neo4j.io.pagecache.PageCursor used on opensource projects

Example 1 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class AbstractRecordFormatTest method writeRecord.

private <R extends AbstractBaseRecord> void writeRecord(R record, RecordFormat<R> format, PagedFile storeFile, int recordSize, BatchingIdSequence idSequence) throws IOException {
    try (PageCursor cursor = storeFile.io(0, PagedFile.PF_SHARED_WRITE_LOCK)) {
        assertedNext(cursor);
        if (record.inUse()) {
            format.prepare(record, recordSize, idSequence);
        }
        int offset = Math.toIntExact(record.getId() * recordSize);
        cursor.setOffset(offset);
        format.write(record, cursor, recordSize);
        assertWithinBounds(record, cursor, "writing");
    }
}

Example 2 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class RelationshipGroupRecordFormatTest method shouldReadUnsignedRelationshipTypeId.

@Test
public void shouldReadUnsignedRelationshipTypeId() throws Exception {
    // GIVEN
    try (PageCursor cursor = new StubPageCursor(1, recordSize * 10)) {
        int offset = 10;
        cursor.next();
        RelationshipGroupRecord group = new RelationshipGroupRecord(2).initialize(true, Short.MAX_VALUE + offset, 1, 2, 3, 4, 5);
        cursor.setOffset(offset);
        format.write(group, cursor, recordSize);
        // WHEN
        RelationshipGroupRecord read = new RelationshipGroupRecord(group.getId());
        cursor.setOffset(offset);
        format.read(read, cursor, NORMAL, recordSize);
        // THEN
        assertEquals(group, read);
    }
}

Example 3 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method putLongOffsettedBeforeFirstPageMustRaiseBoundsFlag.

@Test
public void putLongOffsettedBeforeFirstPageMustRaiseBoundsFlag() throws Exception {
    PageCursor pageCursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    pageCursor.putLong(-1, (long) 1);
    assertTrue(pageCursor.checkAndClearBoundsFlag());
    assertFalse(pageCursor.checkAndClearBoundsFlag());
}

Example 4 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method putByteOffsettedBeyondEndOfViewMustRaiseBoundsFlag.

@Test
public void putByteOffsettedBeyondEndOfViewMustRaiseBoundsFlag() throws Exception {
    PageCursor pageCursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    for (int i = 0; i < 3 * PAGE_SIZE; i++) {
        pageCursor.putByte(i, (byte) 1);
    }
    assertTrue(pageCursor.checkAndClearBoundsFlag());
    assertFalse(pageCursor.checkAndClearBoundsFlag());
}

Example 5 with PageCursor

use of org.neo4j.io.pagecache.PageCursor in project neo4j by neo4j.

the class CompositePageCursorTest method getIntOffsettedBeforeFirstPageMustRaiseBoundsFlag.

@Test
public void getIntOffsettedBeforeFirstPageMustRaiseBoundsFlag() throws Exception {
    PageCursor pageCursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    pageCursor.getInt(-1);
    assertTrue(pageCursor.checkAndClearBoundsFlag());
    assertFalse(pageCursor.checkAndClearBoundsFlag());
}