org.neo4j.driver.internal.DirectConnectionProvider Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of neo4j-java-driver Show documentation
Access to the Neo4j graph database through Java
There is a newer version: 5.27.0
/*
 * Copyright (c) "Neo4j"
 * Neo4j Sweden AB [https://neo4j.com]
 *
 * 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 static org.neo4j.driver.internal.async.ConnectionContext.PENDING_DATABASE_NAME_EXCEPTION_SUPPLIER;

import java.util.concurrent.CompletionStage;
import java.util.function.Function;
import org.neo4j.driver.AuthToken;
import org.neo4j.driver.internal.async.ConnectionContext;
import org.neo4j.driver.internal.async.connection.DirectConnection;
import org.neo4j.driver.internal.messaging.request.MultiDatabaseUtil;
import org.neo4j.driver.internal.spi.Connection;
import org.neo4j.driver.internal.spi.ConnectionPool;
import org.neo4j.driver.internal.spi.ConnectionProvider;
import org.neo4j.driver.internal.util.Futures;
import org.neo4j.driver.internal.util.SessionAuthUtil;

/**
 * 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(ConnectionContext context) {
        var databaseNameFuture = context.databaseNameFuture();
        databaseNameFuture.complete(DatabaseNameUtil.defaultDatabase());
        return acquirePooledConnection(context.overrideAuthToken())
                .thenApply(connection -> new DirectConnection(
                        connection,
                        Futures.joinNowOrElseThrow(databaseNameFuture, PENDING_DATABASE_NAME_EXCEPTION_SUPPLIER),
                        context.mode(),
                        context.impersonatedUser()));
    }

    @Override
    public CompletionStage verifyConnectivity() {
        return acquirePooledConnection(null).thenCompose(Connection::release);
    }

    @Override
    public CompletionStage close() {
        return connectionPool.close();
    }

    @Override
    public CompletionStage supportsMultiDb() {
        return detectFeature(MultiDatabaseUtil::supportsMultiDatabase);
    }

    @Override
    public CompletionStage supportsSessionAuth() {
        return detectFeature(SessionAuthUtil::supportsSessionAuth);
    }

    private CompletionStage detectFeature(Function featureDetectionFunction) {
        return acquirePooledConnection(null).thenCompose(conn -> {
            boolean featureDetected = featureDetectionFunction.apply(conn);
            return conn.release().thenApply(ignored -> featureDetected);
        });
    }

    public BoltServerAddress getAddress() {
        return address;
    }

    /**
     * Used only for grabbing a connection with the server after hello message.
     * This connection cannot be directly used for running any queries as it is missing necessary connection context
     */
    private CompletionStage acquirePooledConnection(AuthToken authToken) {
        return connectionPool.acquire(address, authToken);
    }
}