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ReadReplicaStartupProcessTest.java
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ReadReplicaStartupProcessTest.java
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/*
* Copyright (c) 2002-2017 "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.causalclustering.readreplica;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.util.UUID;
import org.neo4j.causalclustering.catchup.storecopy.CopiedStoreRecovery;
import org.neo4j.causalclustering.catchup.storecopy.LocalDatabase;
import org.neo4j.causalclustering.catchup.storecopy.StoreFetcher;
import org.neo4j.causalclustering.catchup.storecopy.StoreIdDownloadFailedException;
import org.neo4j.causalclustering.core.state.machines.tx.ConstantTimeRetryStrategy;
import org.neo4j.causalclustering.discovery.CoreTopology;
import org.neo4j.causalclustering.discovery.TopologyService;
import org.neo4j.causalclustering.identity.MemberId;
import org.neo4j.causalclustering.identity.StoreId;
import org.neo4j.causalclustering.messaging.routing.AlwaysChooseFirstMember;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.kernel.lifecycle.Lifecycle;
import org.neo4j.logging.NullLogProvider;
import static java.util.concurrent.TimeUnit.MILLISECONDS;
import static org.hamcrest.Matchers.containsString;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;
import static org.mockito.Matchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
import static org.neo4j.helpers.collection.Iterators.asSet;
public class ReadReplicaStartupProcessTest
{
private CopiedStoreRecovery copiedStoreRecovery = mock( CopiedStoreRecovery.class );
private FileSystemAbstraction fs = mock( FileSystemAbstraction.class );
private StoreFetcher storeFetcher = mock( StoreFetcher.class );
private LocalDatabase localDatabase = mock( LocalDatabase.class );
private TopologyService hazelcastTopology = mock( TopologyService.class );
private CoreTopology clusterTopology = mock( CoreTopology.class );
private Lifecycle txPulling = mock( Lifecycle.class );
private MemberId memberId = new MemberId( UUID.randomUUID() );
private StoreId localStoreId = new StoreId( 1, 2, 3, 4 );
private StoreId otherStoreId = new StoreId( 5, 6, 7, 8 );
private File storeDir = new File( "store-dir" );
@Before
public void commonMocking() throws StoreIdDownloadFailedException
{
when( localDatabase.storeDir() ).thenReturn( storeDir );
when( localDatabase.storeId() ).thenReturn( localStoreId );
when( hazelcastTopology.coreServers() ).thenReturn( clusterTopology );
when( clusterTopology.members() ).thenReturn( asSet( memberId ) );
}
@Test
public void shouldReplaceEmptyStoreWithRemote() throws Throwable
{
// given
when( localDatabase.isEmpty() ).thenReturn( true );
when( storeFetcher.getStoreIdOf( any() ) ).thenReturn( otherStoreId );
ReadReplicaStartupProcess
readReplicaStartupProcess = new ReadReplicaStartupProcess( fs, storeFetcher, localDatabase, txPulling,
new AlwaysChooseFirstMember( hazelcastTopology ), new ConstantTimeRetryStrategy( 1, MILLISECONDS ),
NullLogProvider.getInstance(), NullLogProvider.getInstance(), copiedStoreRecovery );
// when
readReplicaStartupProcess.start();
// then
verify( storeFetcher ).copyStore( any(), any(), any() );
verify( localDatabase ).start();
verify( txPulling ).start();
}
@Test
public void shouldNotStartWithMismatchedNonEmptyStore() throws Throwable
{
// given
when( localDatabase.isEmpty() ).thenReturn( false );
when( storeFetcher.getStoreIdOf( any() ) ).thenReturn( otherStoreId );
ReadReplicaStartupProcess
readReplicaStartupProcess = new ReadReplicaStartupProcess( fs, storeFetcher, localDatabase, txPulling,
new AlwaysChooseFirstMember( hazelcastTopology ), new ConstantTimeRetryStrategy( 1, MILLISECONDS ),
NullLogProvider.getInstance(), NullLogProvider.getInstance(), copiedStoreRecovery );
// when
try
{
readReplicaStartupProcess.start();
fail( "should have thrown" );
}
catch ( Exception ex )
{
//expected.
assertThat( ex.getMessage(), containsString(
"This read replica cannot join the cluster. The local database is not empty and has a " +
"mismatching storeId" ) );
}
// then
verify( txPulling, never() ).start();
}
@Test
public void shouldStartWithMatchingDatabase() throws Throwable
{
// given
when( storeFetcher.getStoreIdOf( any() ) ).thenReturn( localStoreId );
when( localDatabase.isEmpty() ).thenReturn( false );
ReadReplicaStartupProcess
readReplicaStartupProcess = new ReadReplicaStartupProcess( fs, storeFetcher, localDatabase, txPulling,
new AlwaysChooseFirstMember( hazelcastTopology ), new ConstantTimeRetryStrategy( 1, MILLISECONDS ),
NullLogProvider.getInstance(), NullLogProvider.getInstance(), copiedStoreRecovery );
// when
readReplicaStartupProcess.start();
// then
verify( localDatabase ).start();
verify( txPulling ).start();
}
@Test
public void stopShouldStopTheDatabaseAndStopPolling() throws Throwable
{
// given
when( storeFetcher.getStoreIdOf( any() ) ).thenReturn( localStoreId );
when( localDatabase.isEmpty() ).thenReturn( false );
ReadReplicaStartupProcess
readReplicaStartupProcess = new ReadReplicaStartupProcess( fs, storeFetcher, localDatabase, txPulling,
new AlwaysChooseFirstMember( hazelcastTopology ), new ConstantTimeRetryStrategy( 1, MILLISECONDS ),
NullLogProvider.getInstance(), NullLogProvider.getInstance(), copiedStoreRecovery );
readReplicaStartupProcess.start();
// when
readReplicaStartupProcess.stop();
// then
verify( txPulling ).stop();
verify( localDatabase ).stop();
}
}