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Access to the Neo4j graph database through Java
/*
* Copyright (c) 2002-2019 "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;
import java.util.concurrent.CompletionStage;
import org.neo4j.driver.AccessMode;
import org.neo4j.driver.internal.async.DecoratedConnection;
import org.neo4j.driver.internal.spi.Connection;
import org.neo4j.driver.internal.spi.ConnectionPool;
import org.neo4j.driver.internal.spi.ConnectionProvider;
import static org.neo4j.driver.AccessMode.READ;
import static org.neo4j.driver.internal.messaging.request.MultiDatabaseUtil.ABSENT_DB_NAME;
/**
* Simple {@link ConnectionProvider connection provider} that obtains connections form the given pool only for
* the given address.
*/
public class DirectConnectionProvider implements ConnectionProvider
{
private final BoltServerAddress address;
private final ConnectionPool connectionPool;
DirectConnectionProvider( BoltServerAddress address, ConnectionPool connectionPool )
{
this.address = address;
this.connectionPool = connectionPool;
}
@Override
public CompletionStage acquireConnection( String databaseName, AccessMode mode )
{
return connectionPool.acquire( address ).thenApply( connection -> new DecoratedConnection( connection, databaseName, mode ) );
}
@Override
public CompletionStage verifyConnectivity()
{
// we verify the connection by establishing the connection to the default database
return acquireConnection( ABSENT_DB_NAME, READ ).thenCompose( Connection::release );
}
@Override
public CompletionStage close()
{
return connectionPool.close();
}
public BoltServerAddress getAddress()
{
return address;
}
}