c23fc3fd7d78e8c293d926f11b177cf7b8b4c54a
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / databroker / actors / dds / ShardBackendInfo.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.databroker.actors.dds;
9
10 import akka.actor.ActorRef;
11 import com.google.common.base.MoreObjects.ToStringHelper;
12 import com.google.common.base.Preconditions;
13 import com.google.common.primitives.UnsignedLong;
14 import java.util.Optional;
15 import org.opendaylight.controller.cluster.access.ABIVersion;
16 import org.opendaylight.controller.cluster.access.client.BackendInfo;
17 import org.opendaylight.controller.cluster.access.concepts.LocalHistoryIdentifier;
18 import org.opendaylight.yangtools.yang.data.api.schema.tree.DataTree;
19
20 /**
21  * Combined backend tracking. Aside from usual {@link BackendInfo}, this object also tracks the cookie assigned
22  * to the shard. This assignment remains constant for as long as the client is not restarted. This class is thread-safe.
23  *
24  * @author Robert Varga
25  */
26 final class ShardBackendInfo extends BackendInfo {
27     private final Optional<DataTree> dataTree;
28     private final UnsignedLong cookie;
29
30     ShardBackendInfo(final ActorRef actor, final long sessionId, final ABIVersion version, final String shardName,
31         final UnsignedLong cookie, final Optional<DataTree> dataTree, final int maxMessages) {
32         super(actor, shardName, sessionId, version, maxMessages);
33         this.cookie = Preconditions.checkNotNull(cookie);
34         this.dataTree = Preconditions.checkNotNull(dataTree);
35     }
36
37     UnsignedLong getCookie() {
38         return cookie;
39     }
40
41     Optional<DataTree> getDataTree() {
42         return dataTree;
43     }
44
45     LocalHistoryIdentifier brandHistory(final LocalHistoryIdentifier id) {
46         Preconditions.checkArgument(id.getCookie() == 0, "History %s is already branded", id);
47         return new LocalHistoryIdentifier(id.getClientId(), id.getHistoryId(), cookie.longValue());
48     }
49
50     @Override
51     protected ToStringHelper addToStringAttributes(final ToStringHelper toStringHelper) {
52         return super.addToStringAttributes(toStringHelper).add("cookie", cookie).add("shard", getName())
53                 .add("dataTree", getDataTree().isPresent() ? "present" : "absent");
54     }
55 }

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