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

Example 16 with PageCursor

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

the class CompositePageCursorTest method getLongMustHitFirstCursorBeforeFlip.

@Test
public void getLongMustHitFirstCursorBeforeFlip() throws Exception {
    PageCursor c = CompositePageCursor.compose(first, 8, second, 8);
    assertThat(c.getLong(), is(0xA0A1A2A3A4A5A6A7L));
    assertFalse(c.checkAndClearBoundsFlag());
}

Example 17 with PageCursor

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

the class CompositePageCursorTest method retryMustResetOffsetsInBothCursors.

@Test
public void retryMustResetOffsetsInBothCursors() throws Exception {
    first.setOffset(1);
    second.setOffset(2);
    PageCursor pageCursor = CompositePageCursor.compose(first, 8, second, 8);
    pageCursor.setOffset(5);
    first.setOffset(3);
    second.setOffset(4);
    first.setNeedsRetry(true);
    pageCursor.shouldRetry();
    assertThat(first.getOffset(), is(1));
    assertThat(second.getOffset(), is(2));
    assertThat(pageCursor.getOffset(), is(0));
    pageCursor.setOffset(5);
    first.setOffset(3);
    second.setOffset(4);
    first.setNeedsRetry(false);
    second.setNeedsRetry(true);
    pageCursor.shouldRetry();
    assertThat(first.getOffset(), is(1));
    assertThat(second.getOffset(), is(2));
    assertThat(pageCursor.getOffset(), is(0));
}

Example 18 with PageCursor

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

the class CompositePageCursorTest method putLongBeyondEndOfViewMustRaiseBoundsFlag.

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

Example 19 with PageCursor

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

the class CompositePageCursorTest method putIntMustHitSecondCursorAfterFlip.

@Test
public void putIntMustHitSecondCursorAfterFlip() throws Exception {
    PageCursor c = CompositePageCursor.compose(first, 4, second, 4);
    c.putInt(1);
    c.putInt(2);
    c.setOffset(4);
    assertThat(c.getInt(), is(2));
    assertFalse(c.checkAndClearBoundsFlag());
}

Example 20 with PageCursor

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

the class CompositePageCursorTest method isWriteLockedMustBeFalseIfSecondCursorIsNotWriteLocked.

@Test
public void isWriteLockedMustBeFalseIfSecondCursorIsNotWriteLocked() throws Exception {
    PageCursor cursor = CompositePageCursor.compose(first, PAGE_SIZE, second, PAGE_SIZE);
    first.setWriteLocked(true);
    second.setWriteLocked(false);
    assertFalse(cursor.isWriteLocked());
}