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

Example 16 with ByteBufferPage

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

the class PageSwapperTest method mustReopenChannelWhenVectoredReadFailsWithAsynchronousCloseException.

@Test
public void mustReopenChannelWhenVectoredReadFailsWithAsynchronousCloseException() throws Exception {
    File file = file("a");
    PageSwapperFactory swapperFactory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(swapperFactory, file);
    ByteBufferPage page = createPage();
    page.putLong(X, 0);
    page.putLong(Y, 8);
    page.putInt(Z, 16);
    swapper.write(0, page);
    Thread.currentThread().interrupt();
    swapper.read(0, new Page[] { page }, 0, 1);
    // Clear the interrupted flag and assert that it was still raised
    assertTrue(Thread.interrupted());
    assertThat(page.getLong(0), is(X));
    assertThat(page.getLong(8), is(Y));
    assertThat(page.getInt(16), is(Z));
    // This must not throw because we should still have a usable channel
    swapper.force();
}

Example 17 with ByteBufferPage

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

the class PageSwapperTest method positionedVectoredReadWhereLastPageExtendBeyondEndOfFileMustHaveRemainderZeroFilled.

@Test
public void positionedVectoredReadWhereLastPageExtendBeyondEndOfFileMustHaveRemainderZeroFilled() throws Exception {
    File file = file("file");
    PageSwapperFactory factory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(factory, file, 4);
    ByteBufferPage output = createPage(4);
    output.putInt(0xFFFF_FFFF, 0);
    swapper.write(0, new Page[] { output, output, output, output, output }, 0, 5);
    swapper.close();
    swapper = createSwapper(factory, file, 8, NO_CALLBACK, false);
    ByteBufferPage pageA = createPage(8);
    ByteBufferPage pageB = createPage(8);
    pageA.putLong(X, 0);
    pageB.putLong(Y, 0);
    assertThat(swapper.read(1, new Page[] { pageA, pageB }, 0, 2), isOneOf(12L, 16L));
    assertThat(pageA.getLong(0), is(0xFFFF_FFFF_FFFF_FFFFL));
    assertThat(pageB.getLong(0), is(0xFFFF_FFFF_0000_0000L));
}

Example 18 with ByteBufferPage

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

the class PageSwapperTest method writeMustNotSwallowInterrupts.

@Test
public void writeMustNotSwallowInterrupts() throws Exception {
    File file = file("a");
    ByteBufferPage page = createPage();
    page.putInt(1, 0);
    PageSwapperFactory swapperFactory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(swapperFactory, file);
    Thread.currentThread().interrupt();
    assertThat(swapper.write(0, page), is(sizeOf(page)));
    assertTrue(Thread.currentThread().isInterrupted());
    page.putInt(0, 0);
    assertThat(swapper.read(0, page), is(sizeOf(page)));
    assertThat(page.getInt(0), is(1));
    assertThat(swapper.write(0, page), is(sizeOf(page)));
    assertTrue(Thread.currentThread().isInterrupted());
    page.putInt(0, 0);
    assertThat(swapper.read(0, page), is(sizeOf(page)));
    assertThat(page.getInt(0), is(1));
}

Example 19 with ByteBufferPage

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

the class PageSwapperTest method vectoredWriteMustNotReopenExplicitlyClosedChannel.

@Test
public void vectoredWriteMustNotReopenExplicitlyClosedChannel() throws Exception {
    File file = file("a");
    ByteBufferPage page = createPage();
    PageSwapperFactory swapperFactory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(swapperFactory, file);
    swapper.close();
    try {
        swapper.write(0, new Page[] { page }, 0, 1);
        fail("Should have thrown because the channel should be closed");
    } catch (ClosedChannelException ignore) {
    // This is fine.
    }
}

Example 20 with ByteBufferPage

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

the class PageSwapperTest method mustThrowNullPointerExceptionFromReadWhenPageArrayIsNull.

@Test
public void mustThrowNullPointerExceptionFromReadWhenPageArrayIsNull() throws Exception {
    File file = file("file");
    PageSwapperFactory factory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(factory, file, 4);
    ByteBufferPage page = createPage(4);
    swapper.write(0, new Page[] { page, page, page, page }, 0, 4);
    try {
        swapper.read(0, null, 0, 4);
        fail("vectored read with null array should have thrown");
    } catch (NullPointerException npe) {
    // This is fine
    }
}