Merge "Create transaction on the backend datastore only when neccessary"
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / databroker / DOMBrokerReadOnlyTransaction.java
1 /*
2  * Copyright (c) 2015 Cisco Systems, Inc. and others.  All rights reserved.
3  *
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
7  */
8
9 package org.opendaylight.controller.cluster.databroker;
10
11 import com.google.common.base.Optional;
12 import com.google.common.util.concurrent.CheckedFuture;
13 import java.util.Map;
14 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
15 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
16 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
17 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
18 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
19 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
20
21 public class DOMBrokerReadOnlyTransaction<T extends DOMStoreReadTransaction>
22     extends AbstractDOMBrokerTransaction<LogicalDatastoreType, T>
23         implements DOMDataReadOnlyTransaction {
24     /**
25      * Creates new composite Transactions.
26      *
27      * @param identifier Identifier of transaction.
28      */
29     protected DOMBrokerReadOnlyTransaction(Object identifier, Map storeTxFactories) {
30         super(identifier, storeTxFactories);
31     }
32
33     @Override
34     public CheckedFuture<Optional<NormalizedNode<?,?>>, ReadFailedException> read(
35             final LogicalDatastoreType store, final YangInstanceIdentifier path) {
36         return getSubtransaction(store).read(path);
37     }
38
39     @Override
40     public CheckedFuture<Boolean, ReadFailedException> exists(
41             final LogicalDatastoreType store,
42             final YangInstanceIdentifier path) {
43         return getSubtransaction(store).exists(path);
44     }
45
46     @Override
47     public void close() {
48         closeSubtransactions();
49     }
50
51     @Override
52     protected T createTransaction(LogicalDatastoreType key) {
53         return (T) getTxFactory(key).newReadOnlyTransaction();
54     }
55
56
57 }

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