A bunch of miscellaneous services to get Distributed Data Store ready for deployment
[controller.git] / opendaylight / md-sal / sal-distributed-datastore / src / main / java / org / opendaylight / controller / cluster / datastore / ThreePhaseCommitCohort.java
1 /*
2  * Copyright (c) 2014 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.datastore;
10
11 import akka.actor.ActorRef;
12 import akka.actor.PoisonPill;
13 import akka.actor.Props;
14 import akka.actor.UntypedActor;
15 import akka.event.Logging;
16 import akka.event.LoggingAdapter;
17 import akka.japi.Creator;
18 import com.google.common.util.concurrent.ListenableFuture;
19 import org.opendaylight.controller.cluster.datastore.messages.AbortTransaction;
20 import org.opendaylight.controller.cluster.datastore.messages.AbortTransactionReply;
21 import org.opendaylight.controller.cluster.datastore.messages.CanCommitTransaction;
22 import org.opendaylight.controller.cluster.datastore.messages.CanCommitTransactionReply;
23 import org.opendaylight.controller.cluster.datastore.messages.CommitTransaction;
24 import org.opendaylight.controller.cluster.datastore.messages.ForwardedCommitTransaction;
25 import org.opendaylight.controller.cluster.datastore.messages.PreCommitTransaction;
26 import org.opendaylight.controller.cluster.datastore.messages.PreCommitTransactionReply;
27 import org.opendaylight.controller.cluster.datastore.modification.CompositeModification;
28 import org.opendaylight.controller.sal.core.spi.data.DOMStoreThreePhaseCommitCohort;
29
30 import java.util.concurrent.ExecutionException;
31
32 public class ThreePhaseCommitCohort extends UntypedActor {
33     private final DOMStoreThreePhaseCommitCohort cohort;
34     private final ActorRef shardActor;
35     private final CompositeModification modification;
36
37     public ThreePhaseCommitCohort(DOMStoreThreePhaseCommitCohort cohort,
38         ActorRef shardActor, CompositeModification modification) {
39
40         this.cohort = cohort;
41         this.shardActor = shardActor;
42         this.modification = modification;
43     }
44
45     private final LoggingAdapter log =
46         Logging.getLogger(getContext().system(), this);
47
48     public static Props props(final DOMStoreThreePhaseCommitCohort cohort,
49         final ActorRef shardActor, final CompositeModification modification) {
50         return Props.create(new Creator<ThreePhaseCommitCohort>() {
51             @Override
52             public ThreePhaseCommitCohort create() throws Exception {
53                 return new ThreePhaseCommitCohort(cohort, shardActor,
54                     modification);
55             }
56         });
57     }
58
59
60     @Override
61     public void onReceive(Object message) throws Exception {
62         log.debug("Received message {}", message);
63
64         if (message instanceof CanCommitTransaction) {
65             canCommit((CanCommitTransaction) message);
66         } else if (message instanceof PreCommitTransaction) {
67             preCommit((PreCommitTransaction) message);
68         } else if (message instanceof CommitTransaction) {
69             commit((CommitTransaction) message);
70         } else if (message instanceof AbortTransaction) {
71             abort((AbortTransaction) message);
72         }
73     }
74
75     private void abort(AbortTransaction message) {
76         final ListenableFuture<Void> future = cohort.abort();
77         final ActorRef sender = getSender();
78         final ActorRef self = getSelf();
79
80         future.addListener(new Runnable() {
81             @Override
82             public void run() {
83                 try {
84                     future.get();
85                     sender.tell(new AbortTransactionReply(), self);
86                 } catch (InterruptedException | ExecutionException e) {
87                     log.error(e, "An exception happened when aborting");
88                 }
89             }
90         }, getContext().dispatcher());
91     }
92
93     private void commit(CommitTransaction message) {
94         // Forward the commit to the shard
95         log.debug("Forward commit transaction to Shard {} ", shardActor);
96         shardActor.forward(new ForwardedCommitTransaction(cohort, modification),
97             getContext());
98
99         getContext().parent().tell(PoisonPill.getInstance(), getSelf());
100
101     }
102
103     private void preCommit(PreCommitTransaction message) {
104         final ListenableFuture<Void> future = cohort.preCommit();
105         final ActorRef sender = getSender();
106         final ActorRef self = getSelf();
107
108         future.addListener(new Runnable() {
109             @Override
110             public void run() {
111                 try {
112                     future.get();
113                     sender.tell(new PreCommitTransactionReply(), self);
114                 } catch (InterruptedException | ExecutionException e) {
115                     log.error(e, "An exception happened when preCommitting");
116                 }
117             }
118         }, getContext().dispatcher());
119
120     }
121
122     private void canCommit(CanCommitTransaction message) {
123         final ListenableFuture<Boolean> future = cohort.canCommit();
124         final ActorRef sender = getSender();
125         final ActorRef self = getSelf();
126
127         future.addListener(new Runnable() {
128             @Override
129             public void run() {
130                 try {
131                     Boolean canCommit = future.get();
132                     sender.tell(new CanCommitTransactionReply(canCommit), self);
133                 } catch (InterruptedException | ExecutionException e) {
134                     log.error(e, "An exception happened when aborting");
135                 }
136             }
137         }, getContext().dispatcher());
138
139     }
140 }

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