-
Notifications
You must be signed in to change notification settings - Fork 2.3k
/
ReplicationModule.java
108 lines (95 loc) · 4.81 KB
/
ReplicationModule.java
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
/*
* Copyright (c) 2002-2018 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j Enterprise Edition. The included source
* code can be redistributed and/or modified under the terms of the
* GNU AFFERO GENERAL PUBLIC LICENSE Version 3
* (http://www.fsf.org/licensing/licenses/agpl-3.0.html) with the
* Commons Clause, as found in the associated LICENSE.txt file.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* Neo4j object code can be licensed independently from the source
* under separate terms from the AGPL. Inquiries can be directed to:
* licensing@neo4j.com
*
* More information is also available at:
* https://neo4j.com/licensing/
*/
package org.neo4j.causalclustering;
import java.io.File;
import java.time.Duration;
import java.util.UUID;
import org.neo4j.causalclustering.core.CausalClusteringSettings;
import org.neo4j.causalclustering.core.consensus.ConsensusModule;
import org.neo4j.causalclustering.core.consensus.RaftMessages;
import org.neo4j.causalclustering.core.replication.ProgressTrackerImpl;
import org.neo4j.causalclustering.core.replication.RaftReplicator;
import org.neo4j.causalclustering.core.replication.session.GlobalSession;
import org.neo4j.causalclustering.core.replication.session.GlobalSessionTrackerState;
import org.neo4j.causalclustering.core.replication.session.LocalSessionPool;
import org.neo4j.causalclustering.core.state.storage.DurableStateStorage;
import org.neo4j.causalclustering.helper.ConstantTimeTimeoutStrategy;
import org.neo4j.causalclustering.helper.ExponentialBackoffStrategy;
import org.neo4j.causalclustering.helper.TimeoutStrategy;
import org.neo4j.causalclustering.identity.MemberId;
import org.neo4j.causalclustering.messaging.Outbound;
import org.neo4j.graphdb.factory.module.PlatformModule;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.availability.AvailabilityGuard;
import org.neo4j.kernel.configuration.Config;
import org.neo4j.kernel.lifecycle.LifeSupport;
import org.neo4j.logging.LogProvider;
public class ReplicationModule
{
public static final String SESSION_TRACKER_NAME = "session-tracker";
private final RaftReplicator replicator;
private final ProgressTrackerImpl progressTracker;
private final SessionTracker sessionTracker;
public ReplicationModule( MemberId myself, PlatformModule platformModule, Config config,
ConsensusModule consensusModule, Outbound<MemberId,RaftMessages.RaftMessage> outbound,
File clusterStateDirectory, FileSystemAbstraction fileSystem, LogProvider logProvider, AvailabilityGuard globalAvailabilityGuard )
{
LifeSupport life = platformModule.life;
DurableStateStorage<GlobalSessionTrackerState> sessionTrackerStorage;
sessionTrackerStorage = life.add( new DurableStateStorage<>( fileSystem, clusterStateDirectory,
SESSION_TRACKER_NAME, new GlobalSessionTrackerState.Marshal( new MemberId.Marshal() ),
config.get( CausalClusteringSettings.global_session_tracker_state_size ), logProvider ) );
sessionTracker = new SessionTracker( sessionTrackerStorage );
GlobalSession myGlobalSession = new GlobalSession( UUID.randomUUID(), myself );
LocalSessionPool sessionPool = new LocalSessionPool( myGlobalSession );
progressTracker = new ProgressTrackerImpl( myGlobalSession );
Duration initialBackoff = config.get( CausalClusteringSettings.replication_retry_timeout_base );
Duration upperBoundBackoff = config.get( CausalClusteringSettings.replication_retry_timeout_limit );
Duration leaderBackoff = config.get( CausalClusteringSettings.replication_leader_retry_timeout );
TimeoutStrategy progressRetryStrategy = new ExponentialBackoffStrategy( initialBackoff, upperBoundBackoff );
TimeoutStrategy leaderRetryStrategy = new ConstantTimeTimeoutStrategy( leaderBackoff );
long availabilityTimeoutMillis = config.get( CausalClusteringSettings.replication_retry_timeout_base ).toMillis();
replicator = new RaftReplicator(
consensusModule.raftMachine(),
myself,
outbound,
sessionPool,
progressTracker,
progressRetryStrategy,
leaderRetryStrategy,
availabilityTimeoutMillis,
globalAvailabilityGuard, logProvider, platformModule.monitors );
}
public RaftReplicator getReplicator()
{
return replicator;
}
public ProgressTrackerImpl getProgressTracker()
{
return progressTracker;
}
public SessionTracker getSessionTracker()
{
return sessionTracker;
}
}