2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
9 package org.opendaylight.mdsal.dom.broker;
11 import com.google.common.base.Function;
12 import com.google.common.base.Optional;
13 import com.google.common.util.concurrent.CheckedFuture;
14 import com.google.common.util.concurrent.FutureCallback;
15 import com.google.common.util.concurrent.Futures;
16 import com.google.common.util.concurrent.ListenableFuture;
17 import com.google.common.util.concurrent.SettableFuture;
18 import javax.annotation.Nullable;
19 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
20 import org.opendaylight.mdsal.common.api.ReadFailedException;
21 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
25 public class TransactionChainReadTransaction implements DOMDataTreeReadTransaction {
27 private final DOMDataTreeReadTransaction delegateReadTx;
28 private final ListenableFuture<Void> previousWriteTxFuture;
29 private final Object identifier;
30 private final ShardedDOMTransactionChainAdapter txChain;
32 TransactionChainReadTransaction(final Object txIdentifier, final DOMDataTreeReadTransaction delegateReadTx,
33 final ListenableFuture<Void> previousWriteTxFuture,
34 final ShardedDOMTransactionChainAdapter txChain) {
35 this.delegateReadTx = delegateReadTx;
36 this.previousWriteTxFuture = previousWriteTxFuture;
37 this.identifier = txIdentifier;
38 this.txChain = txChain;
42 public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final LogicalDatastoreType store,
43 final YangInstanceIdentifier path) {
44 final SettableFuture<Optional<NormalizedNode<?, ?>>> readResult = SettableFuture.create();
46 Futures.addCallback(previousWriteTxFuture, new FutureCallback<Void>() {
48 public void onSuccess(@Nullable final Void result) {
49 Futures.addCallback(delegateReadTx.read(store, path),
50 new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
53 public void onSuccess(@Nullable final Optional<NormalizedNode<?, ?>> result) {
54 readResult.set(result);
58 public void onFailure(final Throwable t) {
59 txChain.transactionFailed(TransactionChainReadTransaction.this, t);
60 readResult.setException(t);
66 public void onFailure(final Throwable t) {
67 // we don't have to notify txchain about this failure
68 // failed write transaction should do this
69 readResult.setException(t);
73 return Futures.makeChecked(readResult, ReadFailedException.MAPPER);
77 public CheckedFuture<Boolean, ReadFailedException> exists(final LogicalDatastoreType store,
78 final YangInstanceIdentifier path) {
79 final Function<Optional<NormalizedNode<?, ?>>, Boolean> transform =
80 optionalNode -> optionalNode.isPresent() ? Boolean.TRUE : Boolean.FALSE;
81 final ListenableFuture<Boolean> existsResult = Futures.transform(read(store, path), transform);
82 return Futures.makeChecked(existsResult, ReadFailedException.MAPPER);
87 delegateReadTx.close();
88 txChain.closeReadTransaction();
92 public Object getIdentifier() {