import org.opendaylight.netconf.sal.connect.netconf.listener.NetconfSessionPreferences;
import org.opendaylight.netconf.sal.connect.netconf.sal.tx.ReadOnlyTx;
import org.opendaylight.netconf.sal.connect.netconf.sal.tx.ReadWriteTx;
+import org.opendaylight.netconf.sal.connect.netconf.sal.tx.TxChain;
import org.opendaylight.netconf.sal.connect.netconf.sal.tx.WriteCandidateRunningTx;
import org.opendaylight.netconf.sal.connect.netconf.sal.tx.WriteCandidateTx;
import org.opendaylight.netconf.sal.connect.netconf.sal.tx.WriteRunningTx;
private final NetconfBaseOps netconfOps;
private final boolean rollbackSupport;
- private boolean candidateSupported;
- private boolean runningWritable;
+ private final boolean candidateSupported;
+ private final boolean runningWritable;
public NetconfDeviceDataBroker(final RemoteDeviceId id, final SchemaContext schemaContext, final DOMRpcService rpc, final NetconfSessionPreferences netconfSessionPreferences) {
this.id = id;
@Override
public DOMTransactionChain createTransactionChain(final TransactionChainListener listener) {
- throw new UnsupportedOperationException(id + ": Transaction chains not supported for netconf mount point");
+ return new TxChain(this, listener);
}
@Override
import com.google.common.util.concurrent.ListenableFuture;
import com.google.common.util.concurrent.SettableFuture;
import java.util.List;
+import java.util.concurrent.CopyOnWriteArrayList;
+import javax.annotation.Nullable;
import org.opendaylight.controller.config.util.xml.DocumentedException;
import org.opendaylight.controller.md.sal.common.api.TransactionStatus;
import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionCommitFailedException;
import org.opendaylight.controller.md.sal.dom.api.DOMDataWriteTransaction;
import org.opendaylight.controller.md.sal.dom.api.DOMRpcResult;
import org.opendaylight.netconf.api.NetconfDocumentedException;
import org.opendaylight.netconf.sal.connect.netconf.util.NetconfBaseOps;
import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
+import org.opendaylight.yangtools.yang.common.RpcError;
import org.opendaylight.yangtools.yang.common.RpcResult;
import org.opendaylight.yangtools.yang.common.RpcResultBuilder;
import org.opendaylight.yangtools.yang.data.api.ModifyAction;
protected final NetconfBaseOps netOps;
protected final boolean rollbackSupport;
protected final List<ListenableFuture<DOMRpcResult>> resultsFutures;
+ private final List<TxListener> listeners = new CopyOnWriteArrayList<>();
// Allow commit to be called only once
protected boolean finished = false;
if(isFinished()) {
return false;
}
-
+ listeners.forEach(listener -> listener.onTransactionCancelled(this));
finished = true;
cleanup();
return true;
@Override
public final ListenableFuture<RpcResult<TransactionStatus>> commit() {
+ listeners.forEach(listener -> listener.onTransactionSubmitted(this));
checkNotFinished();
finished = true;
+ final ListenableFuture<RpcResult<TransactionStatus>> result = performCommit();
+ Futures.addCallback(result, new FutureCallback<RpcResult<TransactionStatus>>() {
+ @Override
+ public void onSuccess(@Nullable final RpcResult<TransactionStatus> result) {
+ if (result != null && result.isSuccessful()) {
+ listeners.forEach(txListener -> txListener.onTransactionSuccessful(AbstractWriteTx.this));
+ } else {
+ final TransactionCommitFailedException cause = new TransactionCommitFailedException("Transaction failed", result.getErrors().toArray(new RpcError[result.getErrors().size()]));
+ listeners.forEach(listener -> listener.onTransactionFailed(AbstractWriteTx.this, cause));
+ }
+ }
- return performCommit();
+ @Override
+ public void onFailure(final Throwable t) {
+ listeners.forEach(listener -> listener.onTransactionFailed(AbstractWriteTx.this, t));
+ }
+ });
+ return result;
}
protected abstract ListenableFuture<RpcResult<TransactionStatus>> performCommit();
public void onFailure(final Throwable throwable) {
final NetconfDocumentedException exception =
new NetconfDocumentedException(
- new DocumentedException(id + ":RPC during tx returned an exception",
- new Exception(throwable),
- DocumentedException.ErrorType.APPLICATION,
- DocumentedException.ErrorTag.OPERATION_FAILED,
- DocumentedException.ErrorSeverity.ERROR));
+ id + ":RPC during tx returned an exception",
+ new Exception(throwable),
+ DocumentedException.ErrorType.APPLICATION,
+ DocumentedException.ErrorTag.OPERATION_FAILED,
+ DocumentedException.ErrorSeverity.ERROR);
transformed.setException(exception);
}
});
return transformed;
}
+
+ AutoCloseable addListener(final TxListener listener) {
+ listeners.add(listener);
+ return () -> listeners.remove(listener);
+ }
}
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.netconf.sal.connect.netconf.sal.tx;
+
+import com.google.common.base.Preconditions;
+import java.util.HashMap;
+import java.util.Map;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainClosedException;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainListener;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataBroker;
+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.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * {@link DOMTransactionChain} implementation for Netconf connector.
+ */
+public class TxChain implements DOMTransactionChain, TxListener {
+
+ private static final Logger LOG = LoggerFactory.getLogger(TxChain.class);
+
+ private final DOMDataBroker dataBroker;
+ private final TransactionChainListener listener;
+ /**
+ * Submitted transactions that haven't completed yet.
+ */
+ private final Map<DOMDataWriteTransaction, AutoCloseable> pendingTransactions = new HashMap<>();
+
+ /**
+ * Transaction created by this chain that hasn't been submitted or cancelled yet.
+ */
+ private AbstractWriteTx currentTransaction = null;
+ private boolean closed = false;
+ private boolean successful = true;
+
+ public TxChain(final DOMDataBroker dataBroker, final TransactionChainListener listener) {
+ this.dataBroker = dataBroker;
+ this.listener = listener;
+ }
+
+ @Override
+ public synchronized DOMDataReadOnlyTransaction newReadOnlyTransaction() {
+ checkOperationPermitted();
+ return dataBroker.newReadOnlyTransaction();
+ }
+
+ @Override
+ public synchronized AbstractWriteTx newWriteOnlyTransaction() {
+ checkOperationPermitted();
+ final DOMDataWriteTransaction writeTransaction = dataBroker.newWriteOnlyTransaction();
+ Preconditions.checkState(writeTransaction instanceof AbstractWriteTx);
+ final AbstractWriteTx pendingWriteTx = (AbstractWriteTx) writeTransaction;
+ pendingTransactions.put(pendingWriteTx, pendingWriteTx.addListener(this));
+ currentTransaction = pendingWriteTx;
+ return pendingWriteTx;
+ }
+
+ @Override
+ public synchronized DOMDataReadWriteTransaction newReadWriteTransaction() {
+ return new ReadWriteTx(dataBroker.newReadOnlyTransaction(), newWriteOnlyTransaction());
+ }
+
+ @Override
+ public synchronized void close() {
+ if (!closed) {
+ closed = true;
+ notifyChainListenerSuccess();
+ }
+ }
+
+ @Override
+ public synchronized void onTransactionSuccessful(final AbstractWriteTx transaction) {
+ removePendingTx(transaction);
+ notifyChainListenerSuccess();
+ }
+
+ @Override
+ public synchronized void onTransactionFailed(final AbstractWriteTx transaction, final Throwable cause) {
+ removePendingTx(transaction);
+ successful = false;
+ if (currentTransaction != null) {
+ currentTransaction.cancel();
+ }
+ listener.onTransactionChainFailed(this, transaction, cause);
+ }
+
+ @Override
+ public synchronized void onTransactionSubmitted(final AbstractWriteTx transaction) {
+ currentTransaction = null;
+ }
+
+ @Override
+ public synchronized void onTransactionCancelled(final AbstractWriteTx transaction) {
+ removePendingTx(transaction);
+ currentTransaction = null;
+ }
+
+ private void removePendingTx(final AbstractWriteTx transaction) {
+ try {
+ pendingTransactions.remove(transaction).close();
+ } catch (final Exception e) {
+ LOG.error("Can't remove transaction listener registration", e);
+ }
+ }
+
+ /**
+ * Checks, if chain isn't closed and if there is no not submitted write transaction waiting.
+ */
+ private void checkOperationPermitted() {
+ if (closed) {
+ throw new TransactionChainClosedException("Transaction chain was closed");
+ }
+ Preconditions.checkState(currentTransaction == null, "Last write transaction has not finished yet");
+ }
+
+ private void notifyChainListenerSuccess() {
+ if (closed && pendingTransactions.isEmpty() && successful) {
+ listener.onTransactionChainSuccessful(this);
+ }
+ }
+
+}
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.netconf.sal.connect.netconf.sal.tx;
+
+interface TxListener {
+
+ /**
+ * Invoked, when transaction completes successfully.
+ * @param transaction transaction
+ */
+ void onTransactionSuccessful(AbstractWriteTx transaction);
+
+ /**
+ * Invoked, when transaction fails.
+ *
+ * @param transaction transaction
+ * @param cause cause
+ */
+ void onTransactionFailed(AbstractWriteTx transaction, Throwable cause);
+
+ /**
+ * Invoked, when transaction is cancelled.
+ * @param transaction transaction
+ */
+ void onTransactionCancelled(AbstractWriteTx transaction);
+
+ /**
+ * Invoked, when transaction is submitted.
+ * @param transaction transaction
+ */
+ void onTransactionSubmitted(AbstractWriteTx transaction);
+
+
+}
import static org.mockito.Mockito.doReturn;
import static org.mockito.Mockito.inOrder;
import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_CANDIDATE_QNAME;
import static org.opendaylight.netconf.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_FILTER_QNAME;
import com.google.common.util.concurrent.CheckedFuture;
import com.google.common.util.concurrent.Futures;
import java.net.InetSocketAddress;
+import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
+import org.mockito.ArgumentCaptor;
import org.mockito.InOrder;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;
inOrder.verify(rpc).invokeRpc(toPath(NetconfMessageTransformUtil.NETCONF_UNLOCK_QNAME), NetconfBaseOps.getUnLockContent(NETCONF_RUNNING_QNAME));
}
+ @Test
+ public void testListenerSuccess() throws Exception {
+ doReturn(Futures.immediateCheckedFuture(new DefaultDOMRpcResult((NormalizedNode<?, ?>) null)))
+ .when(rpc).invokeRpc(any(SchemaPath.class), any(NormalizedNode.class));
+ final WriteCandidateTx tx = new WriteCandidateTx(id, new NetconfBaseOps(rpc, BaseSchema.BASE_NETCONF_CTX.getSchemaContext()), false);
+ final TxListener listener = mock(TxListener.class);
+ tx.addListener(listener);
+ tx.delete(LogicalDatastoreType.CONFIGURATION, yangIId);
+ tx.submit();
+ verify(listener).onTransactionSubmitted(tx);
+ verify(listener).onTransactionSuccessful(tx);
+ verify(listener, never()).onTransactionFailed(eq(tx), any());
+ verify(listener, never()).onTransactionCancelled(tx);
+ }
+
+ @Test
+ public void testListenerCancellation() throws Exception {
+ doReturn(Futures.immediateCheckedFuture(new DefaultDOMRpcResult((NormalizedNode<?, ?>) null)))
+ .when(rpc).invokeRpc(any(SchemaPath.class), any(NormalizedNode.class));
+ final WriteCandidateTx tx = new WriteCandidateTx(id, new NetconfBaseOps(rpc, BaseSchema.BASE_NETCONF_CTX.getSchemaContext()), false);
+ final TxListener listener = mock(TxListener.class);
+ tx.addListener(listener);
+ tx.delete(LogicalDatastoreType.CONFIGURATION, yangIId);
+ tx.cancel();
+ verify(listener).onTransactionCancelled(tx);
+ verify(listener, never()).onTransactionSubmitted(tx);
+ verify(listener, never()).onTransactionSuccessful(tx);
+ verify(listener, never()).onTransactionFailed(eq(tx), any());
+ }
+
+ @Test
+ public void testListenerFailure() throws Exception {
+ final IllegalStateException cause = new IllegalStateException("Failed tx");
+ doReturn(Futures.immediateFailedCheckedFuture(cause))
+ .when(rpc).invokeRpc(any(SchemaPath.class), any(NormalizedNode.class));
+ final WriteCandidateTx tx = new WriteCandidateTx(id, new NetconfBaseOps(rpc, BaseSchema.BASE_NETCONF_CTX.getSchemaContext()), false);
+ final TxListener listener = mock(TxListener.class);
+ tx.addListener(listener);
+ tx.delete(LogicalDatastoreType.CONFIGURATION, yangIId);
+ tx.submit();
+ final ArgumentCaptor<Exception> excCaptor = ArgumentCaptor.forClass(Exception.class);
+ verify(listener).onTransactionSubmitted(tx);
+ verify(listener).onTransactionFailed(eq(tx), excCaptor.capture());
+ Assert.assertEquals(cause, excCaptor.getValue().getCause().getCause());
+ verify(listener, never()).onTransactionSuccessful(tx);
+ verify(listener, never()).onTransactionCancelled(tx);
+ }
}
--- /dev/null
+/*
+ * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+
+package org.opendaylight.netconf.sal.connect.netconf.sal.tx;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import org.junit.Before;
+import org.junit.Test;
+import org.mockito.ArgumentCaptor;
+import org.mockito.Mock;
+import org.mockito.MockitoAnnotations;
+import org.opendaylight.controller.md.sal.common.api.data.TransactionChainClosedException;
+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.DOMDataBroker;
+import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
+
+public class TxChainTest {
+
+ @Mock
+ private DOMDataBroker broker;
+ @Mock
+ private TransactionChainListener listener;
+ @Mock
+ private DOMDataReadOnlyTransaction readOnlyTx;
+ @Mock
+ private AbstractWriteTx writeOnlyTx1;
+ @Mock
+ private AbstractWriteTx writeOnlyTx2;
+ @Mock
+ private AbstractWriteTx writeOnlyTx3;
+ @Mock
+ private AutoCloseable registration1;
+ @Mock
+ private AutoCloseable registration2;
+ @Mock
+ private AutoCloseable registration3;
+ private final ArgumentCaptor<TxListener> captor = ArgumentCaptor.forClass(TxListener.class);
+ private TxChain chain;
+
+ @Before
+ public void setUp() throws Exception {
+ MockitoAnnotations.initMocks(this);
+ when(broker.newReadOnlyTransaction()).thenReturn(readOnlyTx);
+ when(broker.newWriteOnlyTransaction()).thenReturn(writeOnlyTx1).thenReturn(writeOnlyTx2).thenReturn(writeOnlyTx3);
+ when(writeOnlyTx1.addListener(any())).thenReturn(registration1);
+ when(writeOnlyTx2.addListener(any())).thenReturn(registration2);
+ when(writeOnlyTx3.addListener(any())).thenReturn(registration3);
+ chain = new TxChain(broker, listener);
+ }
+
+ @Test()
+ public void testNewReadOnlyTransactionPrevSubmitted() throws Exception {
+ chain.newWriteOnlyTransaction();
+ verify(writeOnlyTx1).addListener(captor.capture());
+ captor.getValue().onTransactionSubmitted(writeOnlyTx1);
+ chain.newReadOnlyTransaction();
+ }
+
+ @Test(expected = IllegalStateException.class)
+ public void testNewReadOnlyTransactionPrevNotSubmitted() throws Exception {
+ chain.newWriteOnlyTransaction();
+ chain.newReadOnlyTransaction();
+ }
+
+ @Test
+ public void testNewReadWriteTransactionPrevSubmitted() throws Exception {
+ chain.newReadWriteTransaction();
+ verify(writeOnlyTx1).addListener(captor.capture());
+ captor.getValue().onTransactionSubmitted(writeOnlyTx1);
+ chain.newReadWriteTransaction();
+ }
+
+ @Test(expected = IllegalStateException.class)
+ public void testNewReadWriteTransactionPrevNotSubmitted() throws Exception {
+ chain.newReadWriteTransaction();
+ chain.newReadWriteTransaction();
+ }
+
+ @Test
+ public void testNewWriteOnlyTransactionPrevSubmitted() throws Exception {
+ chain.newWriteOnlyTransaction();
+ verify(writeOnlyTx1).addListener(captor.capture());
+ captor.getValue().onTransactionSubmitted(writeOnlyTx1);
+ chain.newWriteOnlyTransaction();
+ }
+
+ @Test(expected = IllegalStateException.class)
+ public void testNewWriteOnlyTransactionPrevNotSubmitted() throws Exception {
+ chain.newWriteOnlyTransaction();
+ chain.newWriteOnlyTransaction();
+ }
+
+ @Test(expected = TransactionChainClosedException.class)
+ public void testCloseAfterFinished() throws Exception {
+ chain.close();
+ verify(listener).onTransactionChainSuccessful(chain);
+ chain.newReadOnlyTransaction();
+ }
+
+ @Test
+ public void testChainFail() throws Exception {
+ final AbstractWriteTx writeTx = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeOnlyTx1).addListener(captor.capture());
+ writeTx.submit();
+ final TransactionCommitFailedException cause = new TransactionCommitFailedException("fail");
+ captor.getValue().onTransactionFailed(writeOnlyTx1, cause);
+ verify(registration1).close();
+ verify(listener).onTransactionChainFailed(chain, writeOnlyTx1, cause);
+ }
+
+ @Test
+ public void testChainSuccess() throws Exception {
+ final AbstractWriteTx writeTx = chain.newWriteOnlyTransaction();
+ chain.close();
+ verify(writeOnlyTx1).addListener(captor.capture());
+ writeTx.submit();
+ captor.getValue().onTransactionSuccessful(writeOnlyTx1);
+ verify(registration1).close();
+ verify(listener).onTransactionChainSuccessful(chain);
+ }
+
+ @Test
+ public void testCancel() throws Exception {
+ final AbstractWriteTx writeTx = chain.newWriteOnlyTransaction();
+ verify(writeOnlyTx1).addListener(captor.capture());
+ writeTx.cancel();
+ captor.getValue().onTransactionCancelled(writeOnlyTx1);
+ chain.newWriteOnlyTransaction();
+ }
+
+ @Test
+ public void testMultiplePendingTransactions() throws Exception {
+ //create 1st tx
+ final AbstractWriteTx writeTx1 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor1 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeOnlyTx1).addListener(captor1.capture());
+ //submit 1st tx
+ writeTx1.submit();
+ captor1.getValue().onTransactionSubmitted(writeOnlyTx1);
+
+ //create 2nd tx
+ final AbstractWriteTx writeTx2 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor2 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeTx2).addListener(captor2.capture());
+ //submit 2nd tx
+ writeTx2.submit();
+ captor2.getValue().onTransactionSubmitted(writeOnlyTx2);
+
+ //create 3rd tx
+ final AbstractWriteTx writeTx3 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor3 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeTx3).addListener(captor3.capture());
+ //cancel 3rd tx
+ writeTx3.cancel();
+ captor3.getValue().onTransactionCancelled(writeOnlyTx3);
+
+ //close chain
+ chain.close();
+
+ //complete first two transactions successfully
+ captor1.getValue().onTransactionSuccessful(writeOnlyTx1);
+ captor2.getValue().onTransactionSuccessful(writeOnlyTx2);
+
+ verify(registration1).close();
+ verify(registration2).close();
+ verify(registration3).close();
+ verify(listener).onTransactionChainSuccessful(chain);
+ }
+
+ @Test
+ public void testMultiplePendingTransactionsFail() throws Exception {
+ //create 1st tx
+ final AbstractWriteTx writeTx1 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor1 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeOnlyTx1).addListener(captor1.capture());
+ //submit 1st tx
+ writeTx1.submit();
+ captor1.getValue().onTransactionSubmitted(writeOnlyTx1);
+
+ //create 2nd tx
+ final AbstractWriteTx writeTx2 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor2 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeTx2).addListener(captor2.capture());
+ //submit 2nd tx
+ writeTx2.submit();
+ captor2.getValue().onTransactionSubmitted(writeOnlyTx2);
+
+ //create 3rd tx
+ final AbstractWriteTx writeTx3 = chain.newWriteOnlyTransaction();
+ final ArgumentCaptor<TxListener> captor3 = ArgumentCaptor.forClass(TxListener.class);
+ verify(writeTx3).addListener(captor3.capture());
+
+ chain.close();
+
+ //fail 1st transaction
+ final Exception cause1 = new Exception("fail");
+ captor1.getValue().onTransactionFailed(writeOnlyTx1, cause1);
+ //current unsubmitted transaction should be cancelled
+ verify(writeTx3).cancel();
+ captor3.getValue().onTransactionCancelled(writeTx3);
+ //2nd transaction success
+ captor2.getValue().onTransactionSuccessful(writeOnlyTx2);
+
+ verify(registration1).close();
+ verify(registration2).close();
+ verify(registration3).close();
+ verify(listener).onTransactionChainFailed(chain, writeOnlyTx1, cause1);
+ // 1 transaction failed, onTransactionChainSuccessful must not be called
+ verify(listener, never()).onTransactionChainSuccessful(chain);
+ }
+}
\ No newline at end of file
Code Review / netconf.git / commitdiff