runners/google-cloud-dataflow-java/worker/src/main/java/org/apache/beam/runners/dataflow/worker/Weighers.java

/*
 * 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.beam.runners.dataflow.worker;

import org.apache.beam.sdk.util.Weighted;
import org.apache.beam.vendor.guava.v20_0.com.google.common.cache.Weigher;

/**
 * A {@code Weigher}
 *
 * <p>For internal use only.
 *
 * <p>Package-private here so that the dependency on Guava does not leak into the public API
 * surface.
 */
class Weighers {
  public static Weigher<Object, Weighted> fixedWeightKeys(final int keyWeight) {
    return (key, value) -> (int) Math.min(keyWeight + value.getWeight(), Integer.MAX_VALUE);
  }

  public static Weigher<Weighted, Weighted> weightedKeysAndValues() {
    return (key, value) -> (int) Math.min(key.getWeight() + value.getWeight(), Integer.MAX_VALUE);
  }
}