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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.async;

import static java.lang.System.lineSeparator;

import org.neo4j.driver.AccessMode;
import org.neo4j.driver.Logging;
import org.neo4j.driver.internal.BookmarkHolder;
import org.neo4j.driver.internal.DatabaseName;
import org.neo4j.driver.internal.retry.RetryLogic;
import org.neo4j.driver.internal.spi.ConnectionProvider;
import org.neo4j.driver.internal.util.Futures;

public class LeakLoggingNetworkSession extends NetworkSession {
    private final String stackTrace;

    public LeakLoggingNetworkSession(
            ConnectionProvider connectionProvider,
            RetryLogic retryLogic,
            DatabaseName databaseName,
            AccessMode mode,
            BookmarkHolder bookmarkHolder,
            String impersonatedUser,
            long fetchSize,
            Logging logging) {
        super(connectionProvider, retryLogic, databaseName, mode, bookmarkHolder, impersonatedUser, fetchSize, logging);
        this.stackTrace = captureStackTrace();
    }

    @Override
    protected void finalize() throws Throwable {
        logLeakIfNeeded();
        super.finalize();
    }

    private void logLeakIfNeeded() {
        Boolean isOpen = Futures.blockingGet(currentConnectionIsOpen());
        if (isOpen) {
            log.error(
                    "Neo4j Session object leaked, please ensure that your application "
                            + "fully consumes results in Sessions or explicitly calls `close` on Sessions before disposing of the objects.\n"
                            + "Session was create at:\n"
                            + stackTrace,
                    null);
        }
    }

    private static String captureStackTrace() {
        StringBuilder result = new StringBuilder();
        StackTraceElement[] elements = Thread.currentThread().getStackTrace();
        for (StackTraceElement element : elements) {
            result.append("\t").append(element).append(lineSeparator());
        }
        return result.toString();
    }
}