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DumpClusterStateTest.java
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DumpClusterStateTest.java
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/*
* 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.core.state;
import org.junit.Before;
import org.junit.Rule;
import org.junit.Test;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.IOException;
import java.io.PrintStream;
import java.util.UUID;
import org.neo4j.causalclustering.core.consensus.membership.RaftMembershipState;
import org.neo4j.causalclustering.core.consensus.term.TermState;
import org.neo4j.causalclustering.core.consensus.vote.VoteState;
import org.neo4j.causalclustering.core.replication.session.GlobalSessionTrackerState;
import org.neo4j.causalclustering.core.state.machines.id.IdAllocationState;
import org.neo4j.causalclustering.core.state.machines.locks.ReplicatedLockTokenState;
import org.neo4j.causalclustering.core.state.storage.DurableStateStorage;
import org.neo4j.causalclustering.core.state.storage.SimpleFileStorage;
import org.neo4j.causalclustering.core.state.storage.SimpleStorage;
import org.neo4j.causalclustering.core.state.storage.StateMarshal;
import org.neo4j.causalclustering.identity.MemberId;
import org.neo4j.kernel.lifecycle.Lifespan;
import org.neo4j.logging.NullLogProvider;
import org.neo4j.test.rule.fs.EphemeralFileSystemRule;
import static org.junit.Assert.assertEquals;
import static org.neo4j.causalclustering.ReplicationModule.SESSION_TRACKER_NAME;
import static org.neo4j.causalclustering.core.IdentityModule.CORE_MEMBER_ID_NAME;
import static org.neo4j.causalclustering.core.consensus.ConsensusModule.RAFT_MEMBERSHIP_NAME;
import static org.neo4j.causalclustering.core.consensus.ConsensusModule.RAFT_TERM_NAME;
import static org.neo4j.causalclustering.core.consensus.ConsensusModule.RAFT_VOTE_NAME;
import static org.neo4j.causalclustering.core.server.CoreServerModule.LAST_FLUSHED_NAME;
import static org.neo4j.causalclustering.core.state.machines.CoreStateMachinesModule.ID_ALLOCATION_NAME;
import static org.neo4j.causalclustering.core.state.machines.CoreStateMachinesModule.LOCK_TOKEN_NAME;
public class DumpClusterStateTest
{
@Rule
public EphemeralFileSystemRule fsa = new EphemeralFileSystemRule();
private File dataDir = new File( "data" );
private ClusterStateDirectory clusterStateDirectory = new ClusterStateDirectory( dataDir, false );
@Before
public void setup() throws ClusterStateException
{
clusterStateDirectory.initialize( fsa.get() );
}
@Test
public void shouldDumpClusterState() throws Exception
{
// given
createStates();
ByteArrayOutputStream out = new ByteArrayOutputStream();
DumpClusterState dumpTool = new DumpClusterState( fsa.get(), dataDir, new PrintStream( out ) );
// when
dumpTool.dump();
// then
int lineCount = out.toString().split( System.lineSeparator() ).length;
assertEquals( 8, lineCount );
}
private void createStates() throws IOException
{
SimpleStorage<MemberId> memberIdStorage = new SimpleFileStorage<>( fsa.get(), clusterStateDirectory.get(),
CORE_MEMBER_ID_NAME, new MemberId.Marshal(), NullLogProvider.getInstance() );
memberIdStorage.writeState( new MemberId( UUID.randomUUID() ) );
createDurableState( LAST_FLUSHED_NAME, new LongIndexMarshal() );
createDurableState( LOCK_TOKEN_NAME, new ReplicatedLockTokenState.Marshal( new MemberId.Marshal() ) );
createDurableState( ID_ALLOCATION_NAME, new IdAllocationState.Marshal() );
createDurableState( SESSION_TRACKER_NAME, new GlobalSessionTrackerState.Marshal( new MemberId.Marshal() ) );
/* raft state */
createDurableState( RAFT_MEMBERSHIP_NAME, new RaftMembershipState.Marshal() );
createDurableState( RAFT_TERM_NAME, new TermState.Marshal() );
createDurableState( RAFT_VOTE_NAME, new VoteState.Marshal( new MemberId.Marshal() ) );
}
private <T> void createDurableState( String name, StateMarshal<T> marshal )
{
DurableStateStorage<T> storage = new DurableStateStorage<>(
fsa.get(), clusterStateDirectory.get(), name, marshal, 1024, NullLogProvider.getInstance() );
//noinspection EmptyTryBlock: Will create initial state.
try ( Lifespan ignored = new Lifespan( storage ) )
{
}
}
}