/*
 * Copyright (c) 2008-2015 MongoDB, Inc.
 *
 * 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 com.mongodb.connection;

import com.mongodb.event.ConnectionPoolListenerAdapter;
import com.mongodb.event.ConnectionPoolWaitQueueEnteredEvent;
import com.mongodb.event.ConnectionPoolWaitQueueExitedEvent;

import java.util.concurrent.atomic.AtomicInteger;

class QueueEventsConnectionPoolListener extends ConnectionPoolListenerAdapter {
    private final AtomicInteger waitQueueSize = new AtomicInteger();

    @Override
    public void waitQueueEntered(final ConnectionPoolWaitQueueEnteredEvent event) {
        waitQueueSize.incrementAndGet();
    }

    @Override
    public void waitQueueExited(final ConnectionPoolWaitQueueExitedEvent event) {
        waitQueueSize.decrementAndGet();
    }

    public int getWaitQueueSize() {
        return waitQueueSize.get();
    }
}
