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Extract some session tracking functionality into a SessionTracker.
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103
enterprise/core-edge/src/main/java/org/neo4j/coreedge/ReplicationModule.java
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| /* | ||
| * Copyright (c) 2002-2016 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * 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. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.coreedge; | ||
|
|
||
| import java.io.File; | ||
| import java.io.IOException; | ||
| import java.util.UUID; | ||
| import java.util.function.Supplier; | ||
|
|
||
| import org.neo4j.coreedge.raft.ConsensusModule; | ||
| import org.neo4j.coreedge.raft.RaftMessages; | ||
| import org.neo4j.coreedge.raft.net.Outbound; | ||
| import org.neo4j.coreedge.raft.replication.ProgressTrackerImpl; | ||
| import org.neo4j.coreedge.raft.replication.RaftReplicator; | ||
| import org.neo4j.coreedge.raft.replication.session.GlobalSession; | ||
| import org.neo4j.coreedge.raft.replication.session.GlobalSessionTrackerState; | ||
| import org.neo4j.coreedge.raft.replication.session.LocalSessionPool; | ||
| import org.neo4j.coreedge.raft.replication.tx.ExponentialBackoffStrategy; | ||
| import org.neo4j.coreedge.raft.state.DurableStateStorage; | ||
| import org.neo4j.coreedge.server.CoreEdgeClusterSettings; | ||
| import org.neo4j.coreedge.server.CoreMember; | ||
| import org.neo4j.io.fs.FileSystemAbstraction; | ||
| import org.neo4j.kernel.configuration.Config; | ||
| import org.neo4j.kernel.impl.factory.PlatformModule; | ||
| import org.neo4j.kernel.internal.DatabaseHealth; | ||
| import org.neo4j.kernel.lifecycle.LifeSupport; | ||
| import org.neo4j.logging.LogProvider; | ||
|
|
||
| import static java.util.concurrent.TimeUnit.SECONDS; | ||
|
|
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| public class ReplicationModule | ||
| { | ||
| private final RaftReplicator replicator; | ||
| private final ProgressTrackerImpl progressTracker; | ||
| private final SessionTracker sessionTracker; | ||
|
|
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| public ReplicationModule( CoreMember myself, PlatformModule platformModule, Config config, ConsensusModule consensusModule, | ||
| Outbound<CoreMember,RaftMessages.RaftMessage> loggingOutbound, File clusterStateDirectory, | ||
| FileSystemAbstraction fileSystem, Supplier<DatabaseHealth> databaseHealthSupplier, LogProvider logProvider ) | ||
| { | ||
| LifeSupport life = platformModule.life; | ||
|
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| DurableStateStorage<GlobalSessionTrackerState> sessionTrackerStorage; | ||
| try | ||
| { | ||
| sessionTrackerStorage = life.add( | ||
| new DurableStateStorage<>( fileSystem, new File( clusterStateDirectory, "session-tracker-state" ), | ||
| "session-tracker", | ||
| new GlobalSessionTrackerState.Marshal( new CoreMember.CoreMemberMarshal() ), | ||
| config.get( CoreEdgeClusterSettings.global_session_tracker_state_size ), | ||
| databaseHealthSupplier, logProvider ) ); | ||
|
|
||
| } | ||
| catch ( IOException e ) | ||
| { | ||
| throw new RuntimeException( e ); | ||
| } | ||
|
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| sessionTracker = new SessionTracker( sessionTrackerStorage ); | ||
|
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| GlobalSession myGlobalSession = new GlobalSession( UUID.randomUUID(), myself ); | ||
| LocalSessionPool sessionPool = new LocalSessionPool( myGlobalSession ); | ||
| progressTracker = new ProgressTrackerImpl( myGlobalSession ); | ||
|
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| replicator = new RaftReplicator( consensusModule.raftInstance(), myself, | ||
| loggingOutbound, | ||
| sessionPool, progressTracker, | ||
| new ExponentialBackoffStrategy( 10, SECONDS ) ); | ||
|
|
||
| } | ||
|
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| public RaftReplicator getReplicator() | ||
| { | ||
| return replicator; | ||
| } | ||
|
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| public ProgressTrackerImpl getProgressTracker() | ||
| { | ||
| return progressTracker; | ||
| } | ||
|
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| public SessionTracker getSessionTracker() | ||
| { | ||
| return sessionTracker; | ||
| } | ||
| } |
84 changes: 84 additions & 0 deletions
84
enterprise/core-edge/src/main/java/org/neo4j/coreedge/SessionTracker.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,84 @@ | ||
| /* | ||
| * Copyright (c) 2002-2016 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * 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. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.coreedge; | ||
|
|
||
| import java.io.IOException; | ||
|
|
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| import org.neo4j.coreedge.catchup.storecopy.core.CoreStateType; | ||
| import org.neo4j.coreedge.raft.replication.session.GlobalSession; | ||
| import org.neo4j.coreedge.raft.replication.session.GlobalSessionTrackerState; | ||
| import org.neo4j.coreedge.raft.replication.session.LocalOperationId; | ||
| import org.neo4j.coreedge.raft.state.CoreSnapshot; | ||
| import org.neo4j.coreedge.raft.state.StateStorage; | ||
|
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| public class SessionTracker implements SnapFlushable | ||
| { | ||
| private final StateStorage<GlobalSessionTrackerState> sessionTrackerStorage; | ||
| private GlobalSessionTrackerState sessionState = new GlobalSessionTrackerState(); | ||
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| public SessionTracker( StateStorage<GlobalSessionTrackerState> sessionTrackerStorage ) | ||
| { | ||
| this.sessionTrackerStorage = sessionTrackerStorage; | ||
| } | ||
|
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| public void start() | ||
| { | ||
| sessionState = sessionTrackerStorage.getInitialState(); | ||
| } | ||
|
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| @Override | ||
| public long getLastAppliedIndex() | ||
| { | ||
| return sessionState.logIndex(); | ||
| } | ||
|
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| @Override | ||
| public void flush() throws IOException | ||
| { | ||
| sessionTrackerStorage.persistStoreData( sessionState ); | ||
| } | ||
|
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| @Override | ||
| public void addSnapshots( CoreSnapshot coreSnapshot ) | ||
| { | ||
| coreSnapshot.add( CoreStateType.SESSION_TRACKER, sessionState.newInstance() ); | ||
| } | ||
|
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| @Override | ||
| public void installSnapshots( CoreSnapshot coreSnapshot ) | ||
| { | ||
| sessionState = coreSnapshot.get( CoreStateType.SESSION_TRACKER ); | ||
| } | ||
|
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| public boolean validateOperation( GlobalSession globalSession, LocalOperationId localOperationId ) | ||
| { | ||
| return sessionState.validateOperation( globalSession, localOperationId ); | ||
| } | ||
|
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| public void update( GlobalSession globalSession, LocalOperationId localOperationId, long logIndex ) | ||
| { | ||
| sessionState.update( globalSession, localOperationId, logIndex ); | ||
| } | ||
|
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| public GlobalSessionTrackerState newInstance() | ||
| { | ||
| return sessionState.newInstance(); | ||
| } | ||
| } |
35 changes: 35 additions & 0 deletions
35
enterprise/core-edge/src/main/java/org/neo4j/coreedge/SnapFlushable.java
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,35 @@ | ||
| /* | ||
| * Copyright (c) 2002-2016 "Neo Technology," | ||
| * Network Engine for Objects in Lund AB [http://neotechnology.com] | ||
| * | ||
| * This file is part of Neo4j. | ||
| * | ||
| * Neo4j is free software: you can redistribute it and/or modify | ||
| * it under the terms of the GNU Affero General Public License as | ||
| * published by the Free Software Foundation, either version 3 of the | ||
| * License, or (at your option) any later version. | ||
| * | ||
| * 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. | ||
| * | ||
| * You should have received a copy of the GNU Affero General Public License | ||
| * along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
| */ | ||
| package org.neo4j.coreedge; | ||
|
|
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| import java.io.IOException; | ||
|
|
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| import org.neo4j.coreedge.raft.state.CoreSnapshot; | ||
|
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| public interface SnapFlushable | ||
| { | ||
| void flush() throws IOException; | ||
|
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| void addSnapshots( CoreSnapshot coreSnapshot ); | ||
|
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| long getLastAppliedIndex(); | ||
|
|
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| void installSnapshots( CoreSnapshot coreSnapshot ); | ||
| } |
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