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TestFailover.java
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TestFailover.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.kernel.ha;
import org.junit.Rule;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.Parameterized;
import org.junit.runners.Parameterized.Parameters;
import java.util.Arrays;
import java.util.Collection;
import org.neo4j.cluster.ClusterSettings;
import org.neo4j.kernel.impl.ha.ClusterManager;
import org.neo4j.test.LoggerRule;
import org.neo4j.test.TargetDirectory;
import static org.neo4j.helpers.collection.MapUtil.stringMap;
import static org.neo4j.kernel.impl.ha.ClusterManager.clusterOfSize;
@RunWith( Parameterized.class )
public class TestFailover
{
@Rule
public LoggerRule logger = new LoggerRule();
@Rule
public TargetDirectory.TestDirectory dir = TargetDirectory.testDirForTest( getClass() );
// parameters
private int clusterSize;
@Parameters( name = "clusterSize:{0}")
public static Collection<Object[]> data() {
return Arrays.asList(new Object[][] {
{ 3 },
{ 4 },
{ 5 },
{ 6 },
{ 7 },
});
}
public TestFailover( int clusterSize )
{
this.clusterSize = clusterSize;
}
private void testFailOver( int clusterSize ) throws Throwable
{
// given
ClusterManager clusterManager = new ClusterManager.Builder().withRootDirectory( dir.cleanDirectory( "failover" ) ).
withProvider( ClusterManager.clusterOfSize( clusterSize ) )
.withSharedConfig( stringMap(
ClusterSettings.default_timeout.name(), "1",
ClusterSettings.heartbeat_interval.name(), "1",
ClusterSettings.heartbeat_timeout.name(), "2" ) )
.build();
clusterManager.start();
ClusterManager.ManagedCluster cluster = clusterManager.getDefaultCluster();
cluster.await( ClusterManager.allSeesAllAsAvailable() );
HighlyAvailableGraphDatabase oldMaster = cluster.getMaster();
// When
long start = System.nanoTime();
ClusterManager.RepairKit repairKit = cluster.fail( oldMaster );
logger.getLogger().warning( "Shut down master" );
// Then
cluster.await( ClusterManager.masterAvailable( oldMaster ) );
long end = System.nanoTime();
logger.getLogger().warning( "Failover took:" + (end - start) / 1000000 + "ms" );
repairKit.repair();
Thread.sleep( 3000 ); // give repaired instance chance to cleanly rejoin and exit faster
clusterManager.stop();
}
@Test
public void testFailOver() throws Throwable
{
testFailOver( clusterSize );
}
}