/**
* Copyright (c) 2002-2011 "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;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.management.NotCompliantMBeanException;
import org.neo4j.com.SlaveContext;
import org.neo4j.helpers.Pair;
import org.neo4j.helpers.Service;
import org.neo4j.jmx.impl.ManagementBeanProvider;
import org.neo4j.jmx.impl.ManagementData;
import org.neo4j.jmx.impl.Neo4jMBean;
import org.neo4j.kernel.ha.ConnectionInformation;
import org.neo4j.kernel.ha.MasterServer;
import org.neo4j.management.HighAvailability;
import org.neo4j.management.InstanceInfo;
import org.neo4j.management.SlaveInfo;
import org.neo4j.management.SlaveInfo.SlaveTransaction;
@Service.Implementation( ManagementBeanProvider.class )
public final class HighAvailabilityBean extends ManagementBeanProvider
{
private static final DateFormat ISO8601 = new SimpleDateFormat( "yyyy-MM-dd'T'HH:mm:ssz" );
public HighAvailabilityBean()
{
super( HighAvailability.class );
}
@Override
protected Neo4jMBean createMXBean( ManagementData management ) throws NotCompliantMBeanException
{
return new HighAvailibilityImpl( management, true );
}
@Override
protected Neo4jMBean createMBean( ManagementData management ) throws NotCompliantMBeanException
{
return new HighAvailibilityImpl( management );
}
private static class HighAvailibilityImpl extends Neo4jMBean implements HighAvailability
{
private final HighlyAvailableGraphDatabase db;
HighAvailibilityImpl( ManagementData management )
throws NotCompliantMBeanException
{
super( management );
this.db = (HighlyAvailableGraphDatabase) management.getKernelData().graphDatabase();
}
HighAvailibilityImpl( ManagementData management, boolean isMXBean )
{
super( management, isMXBean );
this.db = (HighlyAvailableGraphDatabase) management.getKernelData().graphDatabase();
}
public String getMachineId()
{
return Integer.toString( db.getMachineId() );
}
public InstanceInfo[] getInstancesInCluster()
{
ConnectionInformation[] connections = db.getBroker().getConnectionInformation();
InstanceInfo[] result = new InstanceInfo[connections.length];
for ( int i = 0; i < result.length; i++ )
{
ConnectionInformation connection = connections[i];
result[i] = new InstanceInfo( connection.getJMXServiceURL().toString(),
connection.getInstanceId(), connection.getMachineId(),
connection.isMaster(), connection.getLastCommitedTransactionId() );
}
return result;
}
public boolean isMaster()
{
return db.getMasterServerIfMaster() != null;
}
public SlaveInfo[] getConnectedSlaves()
{
MasterServer master = db.getMasterServerIfMaster();
if ( master == null ) return null;
List<SlaveInfo> result = new ArrayList<SlaveInfo>();
for ( Map.Entry<Integer, Collection<SlaveContext>> entry : master.getSlaveInformation().entrySet() )
{
result.add( slaveInfo( entry.getKey().intValue(), entry.getValue() ) );
}
return result.toArray( new SlaveInfo[result.size()] );
}
public String getLastUpdateTime()
{
return ISO8601.format( new Date( db.lastUpdateTime() ) );
}
public String update()
{
long time = System.currentTimeMillis();
try
{
db.pullUpdates();
}
catch ( Exception e )
{
return "Update failed: " + e;
}
time = System.currentTimeMillis() - time;
return "Update completed in " + time + "ms";
}
private SlaveInfo slaveInfo( int machineId, Collection<SlaveContext> contexts )
{
List<SlaveTransaction> txInfo = new ArrayList<SlaveTransaction>();
for ( SlaveContext context : contexts )
{
Map<String, Long> lastTransactions = new HashMap<String, Long>();
for ( Pair<String, Long> tx : context.lastAppliedTransactions() )
{
lastTransactions.put( tx.first(), tx.other() );
}
txInfo.add( new SlaveTransaction( context.getEventIdentifier(), lastTransactions ) );
}
ConnectionInformation connection = db.getBroker().getConnectionInformation( machineId );
return new SlaveInfo( connection.getJMXServiceURL().toString(),
connection.getInstanceId(), machineId, false,
connection.getLastCommitedTransactionId(),
txInfo.toArray( new SlaveTransaction[txInfo.size()] ) );
}
}
}