PrimitivesBean.java

package org.neo4j.kernel.impl.management;

import javax.management.NotCompliantMBeanException;

import org.neo4j.graphdb.Node;
import org.neo4j.graphdb.Relationship;
import org.neo4j.graphdb.RelationshipType;
import org.neo4j.helpers.Service;
import org.neo4j.kernel.KernelExtension.KernelData;
import org.neo4j.kernel.impl.core.NodeManager;
import org.neo4j.kernel.impl.nioneo.store.PropertyStore;
import org.neo4j.kernel.management.Primitives;

@Service.Implementation( ManagementBeanProvider.class )
public final class PrimitivesBean extends ManagementBeanProvider
{
    public PrimitivesBean()
    {
        super( Primitives.class );
    }

    @Override
    protected Neo4jMBean createMBean( KernelData kernel ) throws NotCompliantMBeanException
    {
        return new PrimitivesImpl( this, kernel );
    }

    @Description( "Estimates of the numbers of different kinds of Neo4j primitives" )
    private static class PrimitivesImpl extends Neo4jMBean implements Primitives
    {
        protected PrimitivesImpl( ManagementBeanProvider provider, KernelData kernel )
                throws NotCompliantMBeanException
        {
            super( provider, kernel );
            this.nodeManager = kernel.getConfig().getGraphDbModule().getNodeManager();
        }

        private final NodeManager nodeManager;

        @Description( "An estimation of the number of nodes used in this Neo4j instance" )
        public long getNumberOfNodeIdsInUse()
        {
            return nodeManager.getNumberOfIdsInUse( Node.class );
        }

        @Description( "An estimation of the number of relationships used in this Neo4j instance" )
        public long getNumberOfRelationshipIdsInUse()
        {
            return nodeManager.getNumberOfIdsInUse( Relationship.class );
        }

        @Description( "An estimation of the number of properties used in this Neo4j instance" )
        public long getNumberOfPropertyIdsInUse()
        {
            return nodeManager.getNumberOfIdsInUse( PropertyStore.class );
        }

        @Description( "The number of relationship types used in this Neo4j instance" )
        public long getNumberOfRelationshipTypeIdsInUse()
        {
            return nodeManager.getNumberOfIdsInUse( RelationshipType.class );
        }
    }
}