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Neo4j kernel is a lightweight, embedded Java database designed to store data structured as graphs rather than tables. For more information, see http://neo4j.org.

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.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.internal;

import java.util.concurrent.TimeUnit;

import org.neo4j.common.DependencyResolver;
import org.neo4j.graphdb.GraphDatabaseService;
import org.neo4j.internal.kernel.api.connectioninfo.ClientConnectionInfo;
import org.neo4j.internal.kernel.api.security.LoginContext;
import org.neo4j.io.layout.DatabaseLayout;
import org.neo4j.kernel.api.KernelTransaction;
import org.neo4j.kernel.database.NamedDatabaseId;
import org.neo4j.kernel.impl.coreapi.InternalTransaction;
import org.neo4j.kernel.impl.factory.DbmsInfo;

/**
 * This API can be used to get access to services.
 */
public interface GraphDatabaseAPI extends GraphDatabaseService
{
    /**
     * Look up database components for direct access.
     * Usage of this method is generally an indication of architectural error.
     */
    DependencyResolver getDependencyResolver();

    /**
     * @return underlying database directory
     */
    DatabaseLayout databaseLayout();

    /**
     * @return underlying database id
     */
    NamedDatabaseId databaseId();

    DbmsInfo dbmsInfo();

    /**
     * Begin internal transaction with specified type and access mode
     * @param type transaction type
     * @param loginContext transaction login context
     * @return internal transaction
     */
    InternalTransaction beginTransaction( KernelTransaction.Type type, LoginContext loginContext );

    /**
     * Begin internal transaction with specified type and access mode
     * @param type transaction type
     * @param loginContext transaction login context
     * @param clientInfo transaction client info
     * @return internal transaction
     */
    InternalTransaction beginTransaction( KernelTransaction.Type type, LoginContext loginContext, ClientConnectionInfo clientInfo );

    /**
     * Begin internal transaction with specified type, access mode and timeout
     * @param type transaction type
     * @param loginContext transaction login context
     * @param clientInfo transaction client info
     * @param timeout transaction timeout
     * @param unit time unit of timeout argument
     * @return internal transaction
     */
    InternalTransaction beginTransaction( KernelTransaction.Type type, LoginContext loginContext, ClientConnectionInfo clientInfo, long timeout,
            TimeUnit unit );
}