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

Example 6 with ByteBufferPage

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

the class PageSwapperTest method mustReopenChannelWhenReadFailsWithAsynchronousCloseException.

@Test
public void mustReopenChannelWhenReadFailsWithAsynchronousCloseException() 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, page);
    // 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 7 with ByteBufferPage

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

the class PageSwapperTest method vectoredReadMustNotSwallowInterrupts.

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

Example 8 with ByteBufferPage

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

the class PageSwapperTest method streamFilesRecursiveRenameMustNotChangeSourceFileContentsWithReplaceExisting.

@Test
public void streamFilesRecursiveRenameMustNotChangeSourceFileContentsWithReplaceExisting() throws Exception {
    PageSwapperFactory factory = createSwapperFactory();
    File base = baseDirectory();
    File a = new File(base, "a");
    File b = new File(base, "b");
    ByteBufferPage page = createPage();
    PageSwapper swapper = createSwapperAndFile(factory, a);
    long expectedValue = 0xdeadbeeffefefeL;
    page.putLong(expectedValue, 0);
    swapper.write(0, page);
    clear(page);
    swapper.close();
    swapper = createSwapperAndFile(factory, b);
    page.putLong(ThreadLocalRandom.current().nextLong(), 0);
    swapper.write(0, page);
    swapper.close();
    clear(page);
    FileHandle handle = factory.streamFilesRecursive(a).findAny().get();
    handle.rename(b, REPLACE_EXISTING);
    swapper = createSwapper(factory, b, cachePageSize(), NO_CALLBACK, false);
    swapper.read(0, page);
    long actualValue = page.getLong(0);
    assertThat(actualValue, is(expectedValue));
}

Example 9 with ByteBufferPage

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

the class PageSwapperTest method readMustNotSwallowInterrupts.

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

Example 10 with ByteBufferPage

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

the class PageSwapperTest method truncatedFilesMustBeEmpty.

@Test
public void truncatedFilesMustBeEmpty() throws Exception {
    File file = file("file");
    PageSwapperFactory factory = createSwapperFactory();
    PageSwapper swapper = createSwapperAndFile(factory, file);
    assertThat(swapper.getLastPageId(), is(-1L));
    ByteBufferPage page = createPage();
    page.putInt(0xcafebabe, 0);
    swapper.write(10, page);
    clear(page);
    swapper.read(10, page);
    assertThat(page.getInt(0), is(0xcafebabe));
    assertThat(swapper.getLastPageId(), is(10L));
    swapper.close();
    swapper = createSwapper(factory, file, cachePageSize(), NO_CALLBACK, false);
    clear(page);
    swapper.read(10, page);
    assertThat(page.getInt(0), is(0xcafebabe));
    assertThat(swapper.getLastPageId(), is(10L));
    swapper.truncate();
    clear(page);
    swapper.read(10, page);
    assertThat(page.getInt(0), is(0));
    assertThat(swapper.getLastPageId(), is(-1L));
    swapper.close();
    swapper = createSwapper(factory, file, cachePageSize(), NO_CALLBACK, false);
    clear(page);
    swapper.read(10, page);
    assertThat(page.getInt(0), is(0));
    assertThat(swapper.getLastPageId(), is(-1L));
    swapper.close();
}