org.neo4j.driver.internal.cluster.MultiDatabasesRoutingProcedureRunner Maven / Gradle / Ivy

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Access to the Neo4j graph database through Java

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/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [http://neo4j.com]
 *
 * This file is part of Neo4j.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.neo4j.driver.internal.cluster;

import java.util.HashMap;

import org.neo4j.driver.AccessMode;
import org.neo4j.driver.Bookmark;
import org.neo4j.driver.Query;
import org.neo4j.driver.Value;
import org.neo4j.driver.internal.BookmarkHolder;
import org.neo4j.driver.internal.DatabaseName;
import org.neo4j.driver.internal.ReadOnlyBookmarkHolder;
import org.neo4j.driver.internal.async.connection.DirectConnection;
import org.neo4j.driver.internal.spi.Connection;
import org.neo4j.driver.internal.util.ServerVersion;

import static org.neo4j.driver.Values.value;
import static org.neo4j.driver.internal.DatabaseNameUtil.systemDatabase;


/**
 * This implementation of the {@link RoutingProcedureRunner} works with multi database versions of Neo4j calling
 * the procedure `dbms.routing.getRoutingTable`
 */
public class MultiDatabasesRoutingProcedureRunner extends SingleDatabaseRoutingProcedureRunner
{
    static final String DATABASE_NAME = "database";
    static final String MULTI_DB_GET_ROUTING_TABLE = String.format( "CALL dbms.routing.getRoutingTable($%s, $%s)", ROUTING_CONTEXT, DATABASE_NAME );

    public MultiDatabasesRoutingProcedureRunner( RoutingContext context )
    {
        super( context );
    }

    @Override
    BookmarkHolder bookmarkHolder( Bookmark bookmark )
    {
        return new ReadOnlyBookmarkHolder( bookmark );
    }

    @Override
    Query procedureQuery(ServerVersion serverVersion, DatabaseName databaseName )
    {
        HashMap map = new HashMap<>();
        map.put( ROUTING_CONTEXT, value( context.toMap() ) );
        map.put( DATABASE_NAME, value( (Object) databaseName.databaseName().orElse( null ) ) );
        return new Query( MULTI_DB_GET_ROUTING_TABLE, value( map ) );
    }

    @Override
    DirectConnection connection( Connection connection )
    {
        return new DirectConnection( connection, systemDatabase(), AccessMode.READ, null );
    }
}