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ObjectCleanerTest Class — netty Architecture

Architecture documentation for the ObjectCleanerTest class in ObjectCleanerTest.java from the netty codebase.

Class java

Entity Profile

Dependency Diagram

graph TD
  6ab8958b_bdc7_6dbd_0fac_3c76aea02daf["ObjectCleanerTest"]
  392c9b19_5793_b246_a370_bbf8daafd434["ObjectCleanerTest.java"]
  6ab8958b_bdc7_6dbd_0fac_3c76aea02daf -->|defined in| 392c9b19_5793_b246_a370_bbf8daafd434
  f059c2fd_a36d_abca_c249_ecd542b89464["testCleanup()"]
  6ab8958b_bdc7_6dbd_0fac_3c76aea02daf -->|method| f059c2fd_a36d_abca_c249_ecd542b89464
  3e50e3be_f721_6ed4_5011_ee5aa675253f["testCleanupContinuesDespiteThrowing()"]
  6ab8958b_bdc7_6dbd_0fac_3c76aea02daf -->|method| 3e50e3be_f721_6ed4_5011_ee5aa675253f
  b05d574c_d27b_6224_1d8d_112652c6fdb7["testCleanerThreadIsDaemon()"]
  6ab8958b_bdc7_6dbd_0fac_3c76aea02daf -->|method| b05d574c_d27b_6224_1d8d_112652c6fdb7

Relationship Graph

Source Code

common/src/test/java/io/netty/util/internal/ObjectCleanerTest.java lines 31–142

public class ObjectCleanerTest {

    private Thread temporaryThread;
    private Object temporaryObject;

    @Test
    @Timeout(value = 5000, unit = TimeUnit.MILLISECONDS)
    public void testCleanup() throws Exception {
        final AtomicBoolean freeCalled = new AtomicBoolean();
        final CountDownLatch latch = new CountDownLatch(1);
        temporaryThread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    latch.await();
                } catch (InterruptedException ignore) {
                    // just ignore
                }
            }
        });
        temporaryThread.start();
        ObjectCleaner.register(temporaryThread, new Runnable() {
            @Override
            public void run() {
                freeCalled.set(true);
            }
        });

        latch.countDown();
        temporaryThread.join();
        assertFalse(freeCalled.get());

        // Null out the temporary object to ensure it is enqueued for GC.
        temporaryThread = null;

        while (!freeCalled.get()) {
            System.gc();
            System.runFinalization();
            Thread.sleep(100);
        }
    }

    @Test
    @Timeout(value = 5000, unit = TimeUnit.MILLISECONDS)
    public void testCleanupContinuesDespiteThrowing() throws InterruptedException {
        final AtomicInteger freeCalledCount = new AtomicInteger();
        final CountDownLatch latch = new CountDownLatch(1);
        temporaryThread = new Thread(new Runnable() {
            @Override
            public void run() {
                try {
                    latch.await();
                } catch (InterruptedException ignore) {
                    // just ignore
                }
            }
        });
        temporaryThread.start();
        temporaryObject = new Object();
        ObjectCleaner.register(temporaryThread, new Runnable() {
            @Override
            public void run() {
                freeCalledCount.incrementAndGet();
                throw new RuntimeException("expected");
            }
        });
        ObjectCleaner.register(temporaryObject, new Runnable() {
            @Override
            public void run() {
                freeCalledCount.incrementAndGet();
                throw new RuntimeException("expected");
            }
        });

        latch.countDown();
        temporaryThread.join();
        assertEquals(0, freeCalledCount.get());

        // Null out the temporary object to ensure it is enqueued for GC.
        temporaryThread = null;
        temporaryObject = null;

Defined In

Source

Frequently Asked Questions

What is the ObjectCleanerTest class?
ObjectCleanerTest is a class in the netty codebase, defined in common/src/test/java/io/netty/util/internal/ObjectCleanerTest.java.
Where is ObjectCleanerTest defined?
ObjectCleanerTest is defined in common/src/test/java/io/netty/util/internal/ObjectCleanerTest.java at line 31.

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