/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.apache.flink.benchmark.functions;

import org.apache.flink.api.common.functions.ReduceFunction;

public class ValidatingCounter<T> implements ReduceFunction<T> {
    private long expectedCount;
    private long count = 0;

    public ValidatingCounter(long expectedCount) {
        this.expectedCount = expectedCount;
    }

    @Override
    public T reduce(T value1, T value2) throws Exception {
        count++;
        if (count >= expectedCount) {
            throw new SuccessException();
        }
        return value1;
    }
}
