/*
 * 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.facebook.presto.memory;

import com.facebook.presto.spi.QueryId;

@FunctionalInterface
public interface MemoryPoolListener
{
    /**
     * Invoked when memory reservation completes successfully.
     *
     * @param memoryPool             the {@link MemoryPool} where the reservation took place
     * @param queryId                the {@link QueryId} of the query that reserved the memory
     * @param queryMemoryReservation the total amount of memory reserved by the query (revocable and regular)
     */
    void onMemoryReserved(MemoryPool memoryPool, QueryId queryId, long queryMemoryReservation);
}
