io.nosqlbench.engine.api.activityapi.cyclelog.buffers.results.CycleResultsSegment Maven / Gradle / Ivy

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The engine API for nosqlbench; Provides the interfaces needed to build internal modules for the nosqlbench core engine

There is a newer version: 5.17.0

/*
 *
 *    Copyright 2016 jshook
 *    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 io.nosqlbench.engine.api.activityapi.cyclelog.buffers.results;



import java.util.Collections;
import java.util.Iterator;
import java.util.function.Predicate;
import java.util.stream.StreamSupport;

public interface CycleResultsSegment extends Comparable, Iterable {
    long getCount();
    long getMinCycle();

    // TODO: Specialize this for push-down performance
    default CycleResultsSegment filter(Predicate filter) {
        CycleResult[] filteredResults = StreamSupport.stream(spliterator(), false).filter(filter).toArray(CycleResult[]::new);
        return new CycleResultArray(filteredResults);
    }

    default int compareTo( CycleResultsSegment other) {
        return Long.compare(getMinCycle(),other.getMinCycle());
    }

    CycleResultsSegment EMPTY = new EmptySegment();

    public class EmptySegment implements CycleResultsSegment {
        @Override
        public long getCount() {
            return 0;
        }

        @Override
        public long getMinCycle() {
            return Long.MAX_VALUE;
        }


        @Override
        public Iterator iterator() {
            return Collections.emptyIterator();
        }
    }
}