Clean up Segmented(ByteBuf)Journal
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / test / java / org / opendaylight / controller / cluster / databroker / ConcurrentDOMDataBrokerTest.java
index 3a88a729cc8d56b8029159fe0bf2f29de6b2112d..630d582f0c29851d7b5dacd488101b47a459b58f 100644 (file)
@@ -19,8 +19,13 @@ import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.never;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateFalseFluentFuture;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateNullFluentFuture;
+import static org.opendaylight.yangtools.util.concurrent.FluentFutures.immediateTrueFluentFuture;
+
+import com.google.common.base.Throwables;
 import com.google.common.collect.ImmutableMap;
-import com.google.common.util.concurrent.CheckedFuture;
+import com.google.common.util.concurrent.FluentFuture;
 import com.google.common.util.concurrent.FutureCallback;
 import com.google.common.util.concurrent.Futures;
 import com.google.common.util.concurrent.ListenableFuture;
@@ -28,8 +33,6 @@ import com.google.common.util.concurrent.MoreExecutors;
 import com.google.common.util.concurrent.SettableFuture;
 import com.google.common.util.concurrent.Uninterruptibles;
 import java.util.ArrayList;
-import java.util.Arrays;
-import java.util.Collection;
 import java.util.List;
 import java.util.concurrent.CountDownLatch;
 import java.util.concurrent.ExecutionException;
@@ -42,26 +45,28 @@ import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
 import org.mockito.InOrder;
-import org.mockito.invocation.InvocationOnMock;
 import org.mockito.stubbing.Answer;
-import org.opendaylight.controller.cluster.datastore.exceptions.NoShardLeaderException;
-import org.opendaylight.controller.md.sal.common.api.data.DataStoreUnavailableException;
-import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
-import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
-import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
-import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
-import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
-import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
-import org.opendaylight.controller.md.sal.dom.api.DOMTransactionChain;
-import org.opendaylight.controller.md.sal.dom.store.impl.InMemoryDOMDataStore;
-import org.opendaylight.controller.sal.core.spi.data.DOMStore;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadWriteTransaction;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreTransactionChain;
-import org.opendaylight.controller.sal.core.spi.data.DOMStoreWriteTransaction;
+import org.opendaylight.mdsal.common.api.CommitInfo;
+import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
+import org.opendaylight.mdsal.common.api.TransactionCommitFailedException;
+import org.opendaylight.mdsal.dom.api.DOMDataBroker.CommitCohortExtension;
+import org.opendaylight.mdsal.dom.api.DOMDataBroker.DataTreeChangeExtension;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeCommitCohort;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeIdentifier;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeReadWriteTransaction;
+import org.opendaylight.mdsal.dom.api.DOMDataTreeWriteTransaction;
+import org.opendaylight.mdsal.dom.api.DOMTransactionChain;
+import org.opendaylight.mdsal.dom.spi.TransactionCommitFailedExceptionMapper;
+import org.opendaylight.mdsal.dom.spi.store.DOMStore;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreReadTransaction;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreReadWriteTransaction;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreThreePhaseCommitCohort;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreTransactionChain;
+import org.opendaylight.mdsal.dom.spi.store.DOMStoreWriteTransaction;
+import org.opendaylight.mdsal.dom.store.inmemory.InMemoryDOMDataStore;
 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
-import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
+import org.opendaylight.yangtools.yang.data.api.schema.ContainerNode;
 
 /**
  * Unit tests for DOMConcurrentDataCommitCoordinator.
@@ -70,21 +75,20 @@ import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  */
 public class ConcurrentDOMDataBrokerTest {
 
-    private final DOMDataWriteTransaction transaction = mock(DOMDataWriteTransaction.class);
-    private final DOMStoreThreePhaseCommitCohort mockCohort1 = mock(DOMStoreThreePhaseCommitCohort.class);
-    private final DOMStoreThreePhaseCommitCohort mockCohort2 = mock(DOMStoreThreePhaseCommitCohort.class);
+    private final DOMDataTreeWriteTransaction transaction = mock(DOMDataTreeWriteTransaction.class);
+    private final DOMStoreThreePhaseCommitCohort mockCohort = mock(DOMStoreThreePhaseCommitCohort.class);
     private final ThreadPoolExecutor futureExecutor =
-            new ThreadPoolExecutor(0, 1, 5, TimeUnit.SECONDS, new SynchronousQueue<Runnable>());
+            new ThreadPoolExecutor(0, 1, 5, TimeUnit.SECONDS, new SynchronousQueue<>());
     private ConcurrentDOMDataBroker coordinator;
 
     @Before
     public void setup() {
         doReturn("tx").when(transaction).getIdentifier();
 
-        DOMStore store = new InMemoryDOMDataStore("OPER",
-            MoreExecutors.newDirectExecutorService());
+        DOMStore store = new InMemoryDOMDataStore("OPER", MoreExecutors.newDirectExecutorService());
 
-        coordinator = new ConcurrentDOMDataBroker(ImmutableMap.of(LogicalDatastoreType.OPERATIONAL, store), futureExecutor);
+        coordinator = new ConcurrentDOMDataBroker(ImmutableMap.of(LogicalDatastoreType.OPERATIONAL, store),
+                futureExecutor);
     }
 
     @After
@@ -93,116 +97,88 @@ public class ConcurrentDOMDataBrokerTest {
     }
 
     @Test
-    public void testSuccessfulSubmitAsync() throws Throwable {
+    public void testSuccessfulSubmitAsync() throws Exception {
         testSuccessfulSubmit(true);
     }
 
     @Test
-    public void testSuccessfulSubmitSync() throws Throwable {
+    public void testSuccessfulSubmitSync() throws Exception {
         testSuccessfulSubmit(false);
     }
 
-    private void testSuccessfulSubmit(final boolean doAsync) throws Throwable {
+    private void testSuccessfulSubmit(final boolean doAsync) throws InterruptedException {
         final CountDownLatch asyncCanCommitContinue = new CountDownLatch(1);
-        Answer<ListenableFuture<Boolean>> asyncCanCommit = new Answer<ListenableFuture<Boolean>>() {
-            @Override
-            public ListenableFuture<Boolean> answer(final InvocationOnMock invocation) {
-                final SettableFuture<Boolean> future = SettableFuture.create();
-                if(doAsync) {
-                    new Thread() {
-                        @Override
-                        public void run() {
-                            Uninterruptibles.awaitUninterruptibly(asyncCanCommitContinue,
-                                    10, TimeUnit.SECONDS);
-                            future.set(true);
-                        }
-                    }.start();
-                } else {
-                    future.set(true);
-                }
-
-                return future;
+        Answer<ListenableFuture<Boolean>> asyncCanCommit = invocation -> {
+            final SettableFuture<Boolean> future = SettableFuture.create();
+            if (doAsync) {
+                new Thread(() -> {
+                    Uninterruptibles.awaitUninterruptibly(asyncCanCommitContinue, 10, TimeUnit.SECONDS);
+                    future.set(Boolean.TRUE);
+                }).start();
+            } else {
+                future.set(Boolean.TRUE);
             }
-        };
 
-        doAnswer(asyncCanCommit).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).commit();
+            return future;
+        };
 
-        doReturn(Futures.immediateFuture(true)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).commit();
+        doAnswer(asyncCanCommit).when(mockCohort).canCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).preCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).commit();
 
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2));
+        ListenableFuture<? extends CommitInfo> future = coordinator.commit(transaction, mockCohort);
 
         final CountDownLatch doneLatch = new CountDownLatch(1);
         final AtomicReference<Throwable> caughtEx = new AtomicReference<>();
-        Futures.addCallback(future, new FutureCallback<Void>() {
+        Futures.addCallback(future, new FutureCallback<CommitInfo>() {
             @Override
-            public void onSuccess(final Void result) {
+            public void onSuccess(final CommitInfo result) {
                 doneLatch.countDown();
             }
 
             @Override
-            public void onFailure(final Throwable t) {
-                caughtEx.set(t);
+            public void onFailure(final Throwable failure) {
+                caughtEx.set(failure);
                 doneLatch.countDown();
             }
-        });
+        }, MoreExecutors.directExecutor());
 
         asyncCanCommitContinue.countDown();
 
-        assertEquals("Submit complete", true, doneLatch.await(5, TimeUnit.SECONDS));
+        assertTrue("Submit complete", doneLatch.await(5, TimeUnit.SECONDS));
 
-        if(caughtEx.get() != null) {
-            throw caughtEx.get();
+        if (caughtEx.get() != null) {
+            Throwables.throwIfUnchecked(caughtEx.get());
+            throw new RuntimeException(caughtEx.get());
         }
 
         assertEquals("Task count", doAsync ? 1 : 0, futureExecutor.getTaskCount());
 
-        InOrder inOrder = inOrder(mockCohort1, mockCohort2);
-        inOrder.verify(mockCohort1).canCommit();
-        inOrder.verify(mockCohort2).canCommit();
-        inOrder.verify(mockCohort1).preCommit();
-        inOrder.verify(mockCohort2).preCommit();
-        inOrder.verify(mockCohort1).commit();
-        inOrder.verify(mockCohort2).commit();
+        InOrder inOrder = inOrder(mockCohort);
+        inOrder.verify(mockCohort, times(1)).canCommit();
+        inOrder.verify(mockCohort, times(1)).preCommit();
+        inOrder.verify(mockCohort, times(1)).commit();
     }
 
     @Test
     public void testSubmitWithNegativeCanCommitResponse() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).abort();
-
-        doReturn(Futures.immediateFuture(false)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        DOMStoreThreePhaseCommitCohort mockCohort3 = mock(DOMStoreThreePhaseCommitCohort.class);
-        doReturn(Futures.immediateFuture(false)).when(mockCohort3).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort3).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2, mockCohort3));
+        doReturn(Futures.immediateFuture(Boolean.FALSE)).when(mockCohort).canCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).abort();
 
-        assertFailure(future, null, mockCohort1, mockCohort2, mockCohort3);
+        assertFailure(coordinator.commit(transaction, mockCohort), null, mockCohort);
     }
 
-    private static void assertFailure(final CheckedFuture<Void, TransactionCommitFailedException> future,
-            final Exception expCause, final DOMStoreThreePhaseCommitCohort... mockCohorts)
-                    throws Exception {
+    private static void assertFailure(final ListenableFuture<?> future, final Exception expCause,
+            final DOMStoreThreePhaseCommitCohort mockCohort) throws Exception {
         try {
-            future.checkedGet(5, TimeUnit.SECONDS);
+            future.get(5, TimeUnit.SECONDS);
             fail("Expected TransactionCommitFailedException");
-        } catch (TransactionCommitFailedException e) {
-            if(expCause != null) {
-                assertSame("Expected cause", expCause.getClass(), e.getCause().getClass());
-            }
-
-            InOrder inOrder = inOrder((Object[])mockCohorts);
-            for(DOMStoreThreePhaseCommitCohort c: mockCohorts) {
-                inOrder.verify(c).abort();
+        } catch (ExecutionException e) {
+            TransactionCommitFailedException tcf = TransactionCommitFailedExceptionMapper.COMMIT_ERROR_MAPPER.apply(e);
+            if (expCause != null) {
+                assertSame("Expected cause", expCause.getClass(), tcf.getCause().getClass());
             }
+            verify(mockCohort, times(1)).abort();
         } catch (TimeoutException e) {
             throw e;
         }
@@ -210,101 +186,46 @@ public class ConcurrentDOMDataBrokerTest {
 
     @Test
     public void testSubmitWithCanCommitException() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).abort();
-
-        IllegalStateException cause = new IllegalStateException("mock");
-        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2));
+        final Exception cause = new IllegalStateException("mock");
+        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort).canCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).abort();
 
-        assertFailure(future, cause, mockCohort1, mockCohort2);
-    }
-
-    @Test
-    public void testSubmitWithCanCommitDataStoreUnavailableException() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).abort();
-        NoShardLeaderException rootCause = new NoShardLeaderException("mock");
-        DataStoreUnavailableException cause = new DataStoreUnavailableException(rootCause.getMessage(), rootCause);
-        doReturn(Futures.immediateFailedFuture(rootCause)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-            transaction, Arrays.asList(mockCohort1, mockCohort2));
-
-        assertFailure(future, cause, mockCohort1, mockCohort2);
+        assertFailure(coordinator.commit(transaction, mockCohort), cause, mockCohort);
     }
 
     @Test
     public void testSubmitWithPreCommitException() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).abort();
+        doReturn(immediateTrueFluentFuture()).when(mockCohort).canCommit();
+        final IllegalStateException cause = new IllegalStateException("mock");
+        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort).preCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).abort();
 
-        doReturn(Futures.immediateFuture(true)).when(mockCohort2).canCommit();
-        IllegalStateException cause = new IllegalStateException("mock");
-        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort2).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        DOMStoreThreePhaseCommitCohort mockCohort3 = mock(DOMStoreThreePhaseCommitCohort.class);
-        doReturn(Futures.immediateFuture(true)).when(mockCohort3).canCommit();
-        doReturn(Futures.immediateFailedFuture(new IllegalStateException("mock2"))).
-                when(mockCohort3).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort3).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2, mockCohort3));
-
-        assertFailure(future, cause, mockCohort1, mockCohort2, mockCohort3);
+        assertFailure(coordinator.commit(transaction, mockCohort), cause, mockCohort);
     }
 
     @Test
     public void testSubmitWithCommitException() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).preCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).commit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort1).abort();
-
-        doReturn(Futures.immediateFuture(true)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).preCommit();
-        IllegalStateException cause = new IllegalStateException("mock");
-        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort2).commit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        DOMStoreThreePhaseCommitCohort mockCohort3 = mock(DOMStoreThreePhaseCommitCohort.class);
-        doReturn(Futures.immediateFuture(true)).when(mockCohort3).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort3).preCommit();
-        doReturn(Futures.immediateFailedFuture(new IllegalStateException("mock2"))).
-                when(mockCohort3).commit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort3).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2, mockCohort3));
-
-        assertFailure(future, cause, mockCohort1, mockCohort2, mockCohort3);
+        doReturn(immediateTrueFluentFuture()).when(mockCohort).canCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).preCommit();
+        final IllegalStateException cause = new IllegalStateException("mock");
+        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort).commit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).abort();
+
+        assertFailure(coordinator.commit(transaction, mockCohort), cause, mockCohort);
     }
 
     @Test
     public void testSubmitWithAbortException() throws Exception {
-        doReturn(Futures.immediateFuture(true)).when(mockCohort1).canCommit();
-        doReturn(Futures.immediateFailedFuture(new IllegalStateException("mock abort error"))).
-                when(mockCohort1).abort();
+        final Exception canCommitCause = new IllegalStateException("canCommit error");
+        doReturn(Futures.immediateFailedFuture(canCommitCause)).when(mockCohort).canCommit();
+        final Exception abortCause = new IllegalStateException("abort error");
+        doReturn(Futures.immediateFailedFuture(abortCause)).when(mockCohort).abort();
 
-        IllegalStateException cause = new IllegalStateException("mock canCommit error");
-        doReturn(Futures.immediateFailedFuture(cause)).when(mockCohort2).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort2).abort();
-
-        CheckedFuture<Void, TransactionCommitFailedException> future = coordinator.submit(
-                transaction, Arrays.asList(mockCohort1, mockCohort2));
-
-        assertFailure(future, cause, mockCohort1, mockCohort2);
+        assertFailure(coordinator.commit(transaction, mockCohort), canCommitCause, mockCohort);
     }
 
     @Test
-    public void testCreateReadWriteTransaction(){
+    public void testCreateReadWriteTransaction() {
         DOMStore domStore = mock(DOMStore.class);
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
@@ -316,7 +237,7 @@ public class ConcurrentDOMDataBrokerTest {
     }
 
     @Test
-    public void testCreateWriteOnlyTransaction(){
+    public void testCreateWriteOnlyTransaction() {
         DOMStore domStore = mock(DOMStore.class);
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
@@ -328,7 +249,7 @@ public class ConcurrentDOMDataBrokerTest {
     }
 
     @Test
-    public void testCreateReadOnlyTransaction(){
+    public void testCreateReadOnlyTransaction() {
         DOMStore domStore = mock(DOMStore.class);
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
@@ -340,7 +261,7 @@ public class ConcurrentDOMDataBrokerTest {
     }
 
     @Test
-    public void testLazySubTransactionCreationForReadWriteTransactions(){
+    public void testLazySubTransactionCreationForReadWriteTransactions() {
         DOMStore configDomStore = mock(DOMStore.class);
         DOMStore operationalDomStore = mock(DOMStore.class);
         DOMStoreReadWriteTransaction storeTxn = mock(DOMStoreReadWriteTransaction.class);
@@ -351,25 +272,20 @@ public class ConcurrentDOMDataBrokerTest {
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, operationalDomStore, LogicalDatastoreType.CONFIGURATION,
                 configDomStore), futureExecutor)) {
-            DOMDataReadWriteTransaction dataTxn = dataBroker.newReadWriteTransaction();
+            DOMDataTreeReadWriteTransaction dataTxn = dataBroker.newReadWriteTransaction();
 
-            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY);
+            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of(), mock(ContainerNode.class));
+            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of(), mock(ContainerNode.class));
+            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of());
 
             verify(configDomStore, never()).newReadWriteTransaction();
             verify(operationalDomStore, times(1)).newReadWriteTransaction();
-
-            dataTxn.put(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-
-            verify(configDomStore, times(1)).newReadWriteTransaction();
-            verify(operationalDomStore, times(1)).newReadWriteTransaction();
         }
 
     }
 
     @Test
-    public void testLazySubTransactionCreationForWriteOnlyTransactions(){
+    public void testLazySubTransactionCreationForWriteOnlyTransactions() {
         DOMStore configDomStore = mock(DOMStore.class);
         DOMStore operationalDomStore = mock(DOMStore.class);
         DOMStoreWriteTransaction storeTxn = mock(DOMStoreWriteTransaction.class);
@@ -380,23 +296,18 @@ public class ConcurrentDOMDataBrokerTest {
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, operationalDomStore, LogicalDatastoreType.CONFIGURATION,
                 configDomStore), futureExecutor)) {
-            DOMDataWriteTransaction dataTxn = dataBroker.newWriteOnlyTransaction();
+            DOMDataTreeWriteTransaction dataTxn = dataBroker.newWriteOnlyTransaction();
 
-            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
+            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of(), mock(ContainerNode.class));
+            dataTxn.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of(), mock(ContainerNode.class));
 
             verify(configDomStore, never()).newWriteOnlyTransaction();
             verify(operationalDomStore, times(1)).newWriteOnlyTransaction();
-
-            dataTxn.put(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-
-            verify(configDomStore, times(1)).newWriteOnlyTransaction();
-            verify(operationalDomStore, times(1)).newWriteOnlyTransaction();
         }
     }
 
     @Test
-    public void testLazySubTransactionCreationForReadOnlyTransactions(){
+    public void testLazySubTransactionCreationForReadOnlyTransactions() {
         DOMStore configDomStore = mock(DOMStore.class);
         DOMStore operationalDomStore = mock(DOMStore.class);
         DOMStoreReadTransaction storeTxn = mock(DOMStoreReadTransaction.class);
@@ -407,18 +318,13 @@ public class ConcurrentDOMDataBrokerTest {
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, operationalDomStore, LogicalDatastoreType.CONFIGURATION,
                 configDomStore), futureExecutor)) {
-            DOMDataReadOnlyTransaction dataTxn = dataBroker.newReadOnlyTransaction();
+            DOMDataTreeReadTransaction dataTxn = dataBroker.newReadOnlyTransaction();
 
-            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY);
-            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY);
+            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of());
+            dataTxn.read(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of());
 
             verify(configDomStore, never()).newReadOnlyTransaction();
             verify(operationalDomStore, times(1)).newReadOnlyTransaction();
-
-            dataTxn.read(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY);
-
-            verify(configDomStore, times(1)).newReadOnlyTransaction();
-            verify(operationalDomStore, times(1)).newReadOnlyTransaction();
         }
     }
 
@@ -427,12 +333,11 @@ public class ConcurrentDOMDataBrokerTest {
         DOMStore configDomStore = mock(DOMStore.class);
         DOMStore operationalDomStore = mock(DOMStore.class);
         DOMStoreReadWriteTransaction mockStoreReadWriteTransaction = mock(DOMStoreReadWriteTransaction.class);
-        DOMStoreThreePhaseCommitCohort mockCohort = mock(DOMStoreThreePhaseCommitCohort.class);
 
         doReturn(mockStoreReadWriteTransaction).when(operationalDomStore).newReadWriteTransaction();
         doReturn(mockCohort).when(mockStoreReadWriteTransaction).ready();
-        doReturn(Futures.immediateFuture(false)).when(mockCohort).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohort).abort();
+        doReturn(immediateFalseFluentFuture()).when(mockCohort).canCommit();
+        doReturn(immediateNullFluentFuture()).when(mockCohort).abort();
 
         final CountDownLatch latch = new CountDownLatch(1);
         final List<DOMStoreThreePhaseCommitCohort> commitCohorts = new ArrayList<>();
@@ -441,78 +346,33 @@ public class ConcurrentDOMDataBrokerTest {
                 LogicalDatastoreType.OPERATIONAL, operationalDomStore, LogicalDatastoreType.CONFIGURATION,
                 configDomStore), futureExecutor) {
             @Override
-            public CheckedFuture<Void, TransactionCommitFailedException> submit(DOMDataWriteTransaction transaction, Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
-                commitCohorts.addAll(cohorts);
+            public FluentFuture<? extends CommitInfo> commit(DOMDataTreeWriteTransaction writeTx,
+                    DOMStoreThreePhaseCommitCohort cohort) {
+                commitCohorts.add(cohort);
                 latch.countDown();
-                return super.submit(transaction, cohorts);
+                return super.commit(writeTx, cohort);
             }
         }) {
-            DOMDataReadWriteTransaction domDataReadWriteTransaction = dataBroker.newReadWriteTransaction();
+            DOMDataTreeReadWriteTransaction domDataReadWriteTransaction = dataBroker.newReadWriteTransaction();
 
-            domDataReadWriteTransaction.delete(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY);
+            domDataReadWriteTransaction.delete(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of());
 
-            domDataReadWriteTransaction.submit();
+            domDataReadWriteTransaction.commit();
 
-            latch.await(10, TimeUnit.SECONDS);
+            assertTrue(latch.await(10, TimeUnit.SECONDS));
 
             assertTrue(commitCohorts.size() == 1);
         }
     }
 
     @Test
-    public void testSubmitWithOnlyTwoSubTransactions() throws InterruptedException {
-        DOMStore configDomStore = mock(DOMStore.class);
-        DOMStore operationalDomStore = mock(DOMStore.class);
-        DOMStoreReadWriteTransaction operationalTransaction = mock(DOMStoreReadWriteTransaction.class);
-        DOMStoreReadWriteTransaction configTransaction = mock(DOMStoreReadWriteTransaction.class);
-        DOMStoreThreePhaseCommitCohort mockCohortOperational = mock(DOMStoreThreePhaseCommitCohort.class);
-        DOMStoreThreePhaseCommitCohort mockCohortConfig = mock(DOMStoreThreePhaseCommitCohort.class);
-
-        doReturn(operationalTransaction).when(operationalDomStore).newReadWriteTransaction();
-        doReturn(configTransaction).when(configDomStore).newReadWriteTransaction();
-
-        doReturn(mockCohortOperational).when(operationalTransaction).ready();
-        doReturn(Futures.immediateFuture(false)).when(mockCohortOperational).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohortOperational).abort();
-
-        doReturn(mockCohortConfig).when(configTransaction).ready();
-        doReturn(Futures.immediateFuture(false)).when(mockCohortConfig).canCommit();
-        doReturn(Futures.immediateFuture(null)).when(mockCohortConfig).abort();
-
-        final CountDownLatch latch = new CountDownLatch(1);
-        final List<DOMStoreThreePhaseCommitCohort> commitCohorts = new ArrayList<>();
-
-        try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
-                LogicalDatastoreType.OPERATIONAL, operationalDomStore, LogicalDatastoreType.CONFIGURATION,
-                configDomStore), futureExecutor) {
-            @Override
-            public CheckedFuture<Void, TransactionCommitFailedException> submit(DOMDataWriteTransaction transaction, Collection<DOMStoreThreePhaseCommitCohort> cohorts) {
-                commitCohorts.addAll(cohorts);
-                latch.countDown();
-                return super.submit(transaction, cohorts);
-            }
-        }) {
-            DOMDataReadWriteTransaction domDataReadWriteTransaction = dataBroker.newReadWriteTransaction();
-
-            domDataReadWriteTransaction.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-            domDataReadWriteTransaction.merge(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
-
-            domDataReadWriteTransaction.submit();
-
-            latch.await(10, TimeUnit.SECONDS);
-
-            assertTrue(commitCohorts.size() == 2);
-        }
-    }
-
-    @Test
-    public void testCreateTransactionChain(){
+    public void testCreateTransactionChain() {
         DOMStore domStore = mock(DOMStore.class);
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
                 futureExecutor)) {
 
-            dataBroker.createTransactionChain(mock(TransactionChainListener.class));
+            dataBroker.createTransactionChain();
 
             verify(domStore, times(2)).createTransactionChain();
         }
@@ -520,7 +380,7 @@ public class ConcurrentDOMDataBrokerTest {
     }
 
     @Test
-    public void testCreateTransactionOnChain(){
+    public void testCreateTransactionOnChain() {
         DOMStore domStore = mock(DOMStore.class);
         try (ConcurrentDOMDataBroker dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
@@ -532,13 +392,14 @@ public class ConcurrentDOMDataBrokerTest {
             doReturn(mockChain).when(domStore).createTransactionChain();
             doReturn(operationalTransaction).when(mockChain).newWriteOnlyTransaction();
 
-            DOMTransactionChain transactionChain = dataBroker.createTransactionChain(mock(TransactionChainListener.class));
+            DOMTransactionChain transactionChain = dataBroker.createTransactionChain();
 
-            DOMDataWriteTransaction domDataWriteTransaction = transactionChain.newWriteOnlyTransaction();
+            DOMDataTreeWriteTransaction domDataWriteTransaction = transactionChain.newWriteOnlyTransaction();
 
             verify(mockChain, never()).newWriteOnlyTransaction();
 
-            domDataWriteTransaction.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.EMPTY, mock(NormalizedNode.class));
+            domDataWriteTransaction.put(LogicalDatastoreType.OPERATIONAL, YangInstanceIdentifier.of(),
+                    mock(ContainerNode.class));
         }
     }
 
@@ -549,13 +410,13 @@ public class ConcurrentDOMDataBrokerTest {
                 LogicalDatastoreType.OPERATIONAL, domStore, LogicalDatastoreType.CONFIGURATION, domStore),
                 futureExecutor)) {
 
-            CheckedFuture<Void, TransactionCommitFailedException> submit1 = dataBroker.newWriteOnlyTransaction().submit();
+            FluentFuture<? extends CommitInfo> submit1 = dataBroker.newWriteOnlyTransaction().commit();
 
             assertNotNull(submit1);
 
             submit1.get();
 
-            CheckedFuture<Void, TransactionCommitFailedException> submit2 = dataBroker.newReadWriteTransaction().submit();
+            FluentFuture<? extends CommitInfo> submit2 = dataBroker.newReadWriteTransaction().commit();
 
             assertNotNull(submit2);
 
@@ -563,4 +424,23 @@ public class ConcurrentDOMDataBrokerTest {
         }
     }
 
+    @Test
+    public void testExtensions() {
+        final var mockConfigStore = mock(ClientBackedDataStore.class);
+        final var mockOperStore = mock(ClientBackedDataStore.class);
+        try (var dataBroker = new ConcurrentDOMDataBroker(ImmutableMap.of(
+                LogicalDatastoreType.OPERATIONAL, mockOperStore,
+                LogicalDatastoreType.CONFIGURATION, mockConfigStore), futureExecutor)) {
+            assertNotNull(dataBroker.extension(DataTreeChangeExtension.class));
+
+            final var cohortRegistry = dataBroker.extension(CommitCohortExtension.class);
+            assertNotNull(cohortRegistry);
+
+            final var cohort = mock(DOMDataTreeCommitCohort.class);
+            final var path = DOMDataTreeIdentifier.of(LogicalDatastoreType.CONFIGURATION, YangInstanceIdentifier.of());
+            cohortRegistry.registerCommitCohort(path, cohort);
+
+            verify(mockConfigStore).registerCommitCohort(path, cohort);
+        }
+    }
 }