ad9bc4a7e846a54c05e98baa05c98df16624d699
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / persisted / AbortTransactionPayload.java
1 /*
2  * Copyright (c) 2016 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 package org.opendaylight.controller.cluster.datastore.persisted;
9
10 import com.google.common.io.ByteArrayDataOutput;
11 import com.google.common.io.ByteStreams;
12 import java.io.DataInput;
13 import java.io.IOException;
14 import org.opendaylight.controller.cluster.access.concepts.TransactionIdentifier;
15 import org.slf4j.Logger;
16 import org.slf4j.LoggerFactory;
17
18 /**
19  * Payload persisted when a transaction is aborted. It contains the transaction identifier.
20  *
21  * @author Robert Varga
22  */
23 public final class AbortTransactionPayload extends AbstractIdentifiablePayload<TransactionIdentifier> {
24     private static final class Proxy extends AbstractProxy<TransactionIdentifier> {
25         private static final long serialVersionUID = 1L;
26
27         // checkstyle flags the public modifier as redundant which really doesn't make sense since it clearly isn't
28         // redundant. It is explicitly needed for Java serialization to be able to create instances via reflection.
29         @SuppressWarnings("checkstyle:RedundantModifier")
30         public Proxy() {
31             // For Externalizable
32         }
33
34         Proxy(final byte[] serialized) {
35             super(serialized);
36         }
37
38         @Override
39         protected TransactionIdentifier readIdentifier(final DataInput in) throws IOException {
40             return TransactionIdentifier.readFrom(in);
41         }
42
43         @Override
44         protected AbortTransactionPayload createObject(final TransactionIdentifier identifier,
45                 final byte[] serialized) {
46             return new AbortTransactionPayload(identifier, serialized);
47         }
48     }
49
50     private static final Logger LOG = LoggerFactory.getLogger(AbortTransactionPayload.class);
51     private static final long serialVersionUID = 1L;
52
53     AbortTransactionPayload(final TransactionIdentifier transactionId, final byte[] serialized) {
54         super(transactionId, serialized);
55     }
56
57     public static AbortTransactionPayload create(final TransactionIdentifier transactionId) {
58         final ByteArrayDataOutput out = ByteStreams.newDataOutput();
59         try {
60             transactionId.writeTo(out);
61         } catch (IOException e) {
62             // This should never happen
63             LOG.error("Failed to serialize {}", transactionId, e);
64             throw new RuntimeException("Failed to serialized " + transactionId, e);
65         }
66         return new AbortTransactionPayload(transactionId, out.toByteArray());
67     }
68
69     @Override
70     protected Proxy externalizableProxy(final byte[] serialized) {
71         return new Proxy(serialized);
72     }
73 }

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