Examples with ManagedChannelReference io.grpc.internal.ManagedChannelOrphanWrapper.ManagedChannelReference used on opensource projects

Example 1 with ManagedChannelReference

use of io.grpc.internal.ManagedChannelOrphanWrapper.ManagedChannelReference in project grpc-java by grpc.

the class ManagedChannelOrphanWrapperTest method orphanedChannelsAreLogged.

@Test
public void orphanedChannelsAreLogged() {
    ManagedChannel mc = new TestManagedChannel();
    String channelString = mc.toString();
    final ReferenceQueue<ManagedChannelOrphanWrapper> refqueue = new ReferenceQueue<>();
    ConcurrentMap<ManagedChannelReference, ManagedChannelReference> refs = new ConcurrentHashMap<>();
    assertEquals(0, refs.size());
    @SuppressWarnings("UnusedVariable") ManagedChannelOrphanWrapper channel = new ManagedChannelOrphanWrapper(mc, refqueue, refs);
    assertEquals(1, refs.size());
    // Try to capture the log output but without causing terminal noise.  Adding the filter must
    // be done before clearing the ref or else it might be missed.
    final List<LogRecord> records = new ArrayList<>(1);
    Logger orphanLogger = Logger.getLogger(ManagedChannelOrphanWrapper.class.getName());
    Filter oldFilter = orphanLogger.getFilter();
    orphanLogger.setFilter(new Filter() {

        @Override
        public boolean isLoggable(LogRecord record) {
            synchronized (records) {
                records.add(record);
            }
            return false;
        }
    });
    try {
        channel = null;
        final AtomicInteger numOrphans = new AtomicInteger();
        GcFinalization.awaitDone(new FinalizationPredicate() {

            @Override
            public boolean isDone() {
                numOrphans.getAndAdd(ManagedChannelReference.cleanQueue(refqueue));
                return numOrphans.get() > 0;
            }
        });
        assertEquals("unexpected extra orphans", 1, numOrphans.get());
        LogRecord lr;
        synchronized (records) {
            assertEquals(1, records.size());
            lr = records.get(0);
        }
        assertThat(lr.getMessage()).contains("shutdown");
        assertThat(lr.getParameters()).asList().containsExactly(channelString).inOrder();
        assertEquals(Level.SEVERE, lr.getLevel());
        assertEquals(0, refs.size());
    } finally {
        orphanLogger.setFilter(oldFilter);
    }
}