Examples with PagesReleasedListener com.facebook.presto.execution.buffer.SerializedPageReference.PagesReleasedListener used on opensource projects

Example 1 with PagesReleasedListener

use of com.facebook.presto.execution.buffer.SerializedPageReference.PagesReleasedListener in project presto by prestodb.

the class TestClientBuffer method testReferenceCount.

@Test
public void testReferenceCount() {
    AtomicInteger releasedPages = new AtomicInteger(0);
    PagesReleasedListener onPagesReleased = (lifespan, releasedPagesCount, releasedSizeInBytes) -> {
        releasedPages.addAndGet(releasedPagesCount);
    };
    ClientBuffer buffer = new ClientBuffer(TASK_INSTANCE_ID, BUFFER_ID, onPagesReleased);
    // add 2 pages and verify they are referenced
    addPage(buffer, createPage(0));
    addPage(buffer, createPage(1));
    assertEquals(releasedPages.get(), 0);
    assertBufferInfo(buffer, 2, 0);
    // read one page
    assertBufferResultEquals(TYPES, getBufferResult(buffer, 0, sizeOfPages(0), NO_WAIT), bufferResult(0, createPage(0)));
    assertEquals(releasedPages.get(), 0);
    assertBufferInfo(buffer, 2, 0);
    // acknowledge first page
    assertBufferResultEquals(TYPES, getBufferResult(buffer, 1, sizeOfPages(1), NO_WAIT), bufferResult(1, createPage(1)));
    assertEquals(releasedPages.get(), 1);
    assertBufferInfo(buffer, 1, 1);
    // destroy the buffer
    buffer.destroy();
    assertEquals(releasedPages.get(), 2);
    assertBufferDestroyed(buffer, 1);
}