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EntityCountMetrics.java
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EntityCountMetrics.java
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/*
* Copyright (c) 2002-2015 "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.metrics.source.db;
import com.codahale.metrics.Gauge;
import com.codahale.metrics.MetricRegistry;
import org.neo4j.kernel.IdGeneratorFactory;
import org.neo4j.kernel.IdType;
import org.neo4j.kernel.impl.annotations.Documented;
import org.neo4j.kernel.lifecycle.LifecycleAdapter;
import static com.codahale.metrics.MetricRegistry.name;
@Documented( ".Database Data Metrics" )
public class EntityCountMetrics extends LifecycleAdapter
{
private static final String COUNTS_PREFIX = "neo4j.ids_in_use";
@Documented( "The total number of different relationship types stored in the database" )
public static final String COUNTS_RELATIONSHIP_TYPE = name( COUNTS_PREFIX, "relationship_type" );
@Documented( "The total number of different property names used in the database" )
public static final String COUNTS_PROPERTY = name( COUNTS_PREFIX, "property" );
@Documented( "The total number of relationships stored in the database" )
public static final String COUNTS_RELATIONSHIP = name( COUNTS_PREFIX, "relationship" );
@Documented( "The total number of nodes stored in the database" )
public static final String COUNTS_NODE = name( COUNTS_PREFIX, "node" );
private final MetricRegistry registry;
@SuppressWarnings( "deprecation" )
private final IdGeneratorFactory idGeneratorFactory;
public EntityCountMetrics( MetricRegistry registry,
@SuppressWarnings( "deprecation" ) IdGeneratorFactory idGeneratorFactory )
{
this.registry = registry;
this.idGeneratorFactory = idGeneratorFactory;
}
@Override
public void start()
{
registry.register( COUNTS_NODE, new Gauge<Long>()
{
@Override
public Long getValue()
{
return idGeneratorFactory.get( IdType.NODE ).getNumberOfIdsInUse();
}
} );
registry.register( COUNTS_RELATIONSHIP, new Gauge<Long>()
{
@Override
public Long getValue()
{
return idGeneratorFactory.get( IdType.RELATIONSHIP ).getNumberOfIdsInUse();
}
} );
registry.register( COUNTS_PROPERTY, new Gauge<Long>()
{
@Override
public Long getValue()
{
return idGeneratorFactory.get( IdType.PROPERTY ).getNumberOfIdsInUse();
}
} );
registry.register( COUNTS_RELATIONSHIP_TYPE, new Gauge<Long>()
{
@Override
public Long getValue()
{
return idGeneratorFactory.get( IdType.RELATIONSHIP_TYPE_TOKEN ).getNumberOfIdsInUse();
}
} );
}
@Override
public void stop()
{
registry.remove( COUNTS_NODE );
registry.remove( COUNTS_RELATIONSHIP );
registry.remove( COUNTS_PROPERTY );
registry.remove( COUNTS_RELATIONSHIP_TYPE );
}
}