org.neo4j.kernel.impl.api.index.OnlineIndexProxy Maven / Gradle / Ivy

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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 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see .
 */
package org.neo4j.kernel.impl.api.index;

import java.io.File;
import java.io.IOException;
import java.util.concurrent.Future;

import org.neo4j.graphdb.ResourceIterator;
import org.neo4j.kernel.api.exceptions.index.IndexPopulationFailedKernelException;
import org.neo4j.kernel.api.index.IndexAccessor;
import org.neo4j.kernel.api.index.IndexConfiguration;
import org.neo4j.kernel.api.index.IndexDescriptor;
import org.neo4j.kernel.api.index.IndexReader;
import org.neo4j.kernel.api.index.IndexUpdater;
import org.neo4j.kernel.api.index.InternalIndexState;
import org.neo4j.kernel.api.index.SchemaIndexProvider;

import static org.neo4j.helpers.FutureAdapter.VOID;

public class OnlineIndexProxy implements IndexProxy
{
    private final IndexDescriptor descriptor;
    final IndexAccessor accessor;
    private final IndexStoreView storeView;
    private final SchemaIndexProvider.Descriptor providerDescriptor;
    private final IndexConfiguration configuration;
    private final IndexCountsRemover indexCountsRemover;

    public OnlineIndexProxy( IndexDescriptor descriptor, IndexConfiguration configuration, IndexAccessor accessor,
                             IndexStoreView storeView, SchemaIndexProvider.Descriptor providerDescriptor )
    {
        this.descriptor = descriptor;
        this.storeView = storeView;
        this.providerDescriptor = providerDescriptor;
        this.accessor = accessor;
        this.configuration = configuration;
        this.indexCountsRemover = IndexCountsRemover.Factory.create( storeView, descriptor );
    }

    @Override
    public void start()
    {
    }

    @Override
    public IndexUpdater newUpdater( final IndexUpdateMode mode )
    {
        return updateCountingUpdater( accessor.newUpdater( mode ) );
    }

    private IndexUpdater updateCountingUpdater( final IndexUpdater indexUpdater )
    {
        return new UpdateCountingIndexUpdater( storeView, descriptor, indexUpdater );
    }

    @Override
    public Future drop() throws IOException
    {
        indexCountsRemover.remove();
        accessor.drop();
        return VOID;
    }

    @Override
    public IndexDescriptor getDescriptor()
    {
        return descriptor;
    }

    @Override
    public SchemaIndexProvider.Descriptor getProviderDescriptor()
    {
        return providerDescriptor;
    }

    @Override
    public InternalIndexState getState()
    {
        return InternalIndexState.ONLINE;
    }

    @Override
    public void force() throws IOException
    {
        accessor.force();
    }

    @Override
    public void flush() throws IOException
    {
        accessor.flush();
    }

    @Override
    public Future close() throws IOException
    {
        accessor.close();
        return VOID;
    }

    @Override
    public IndexReader newReader()
    {
        return accessor.newReader();
    }

    @Override
    public boolean awaitStoreScanCompleted() throws IndexPopulationFailedKernelException, InterruptedException
    {
        return false; // the store scan is already completed
    }

    @Override
    public void activate()
    {
        // ok, already active
    }

    @Override
    public void validate()
    {
        // ok, it's online so it's valid
    }

    @Override
    public IndexPopulationFailure getPopulationFailure() throws IllegalStateException
    {
        throw new IllegalStateException( this + " is ONLINE" );
    }

    @Override
    public ResourceIterator snapshotFiles() throws IOException
    {
        return accessor.snapshotFiles();
    }

    @Override
    public IndexConfiguration config()
    {
        return configuration;
    }

    @Override
    public String toString()
    {
        return getClass().getSimpleName() + "[accessor:" + accessor + ", descriptor:" + descriptor + "]";
    }

}