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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.util;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.CompletionStage;
import java.util.concurrent.locks.Lock;
import java.util.function.Supplier;

public class LockUtil
{
    public static void executeWithLock( Lock lock, Runnable runnable )
    {
        lock.lock();
        try
        {
            runnable.run();
        }
        finally
        {
            lock.unlock();
        }
    }

    public static  T executeWithLock( Lock lock, Supplier supplier )
    {
        lock.lock();
        try
        {
            return supplier.get();
        }
        finally
        {
            lock.unlock();
        }
    }

    public static  void executeWithLockAsync( Lock lock, Supplier> stageSupplier )
    {
        lock.lock();
        CompletableFuture.completedFuture( lock )
                         .thenCompose( ignored -> stageSupplier.get() )
                         .whenComplete( ( ignored, throwable ) -> lock.unlock() );
    }
}