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/*
 * 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.tests.querystats;

import com.facebook.presto.execution.QueryStats;

import java.util.Optional;

/**
 * Simple client for accessing Presto's /query REST interface. Implemented for testing purposes.
 */
public interface QueryStatsClient
{
    /**
     * Obtains QueryStats for query with given id. If query does not exist or
     * does not contain queryStats information Optional.empty() is returned.
     */
    Optional getQueryStats(String queryId);
}