org.apache.flink.runtime.shuffle.ShuffleUtils Maven / Gradle / Ivy
/*
* 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.runtime.shuffle;
import java.util.function.Function;
/**
* Common utility methods for shuffle service.
*/
public class ShuffleUtils {
private ShuffleUtils() {
}
/**
* Apply different functions to known and unknown {@link ShuffleDescriptor}s.
*
* Also casts known {@link ShuffleDescriptor}.
*
* @param shuffleDescriptorClass concrete class of {@code shuffleDescriptor}
* @param shuffleDescriptor concrete shuffle descriptor to check
* @param functionOfUnknownDescriptor supplier to call in case {@code shuffleDescriptor} is unknown
* @param functionOfKnownDescriptor function to call in case {@code shuffleDescriptor} is known
* @param return type of called functions
* @param concrete type of {@code shuffleDescriptor} to check
* @return result of either function call
*/
@SuppressWarnings("unchecked")
public static T applyWithShuffleTypeCheck(
Class shuffleDescriptorClass,
ShuffleDescriptor shuffleDescriptor,
Function functionOfUnknownDescriptor,
Function functionOfKnownDescriptor) {
if (shuffleDescriptor.isUnknown()) {
return functionOfUnknownDescriptor.apply((UnknownShuffleDescriptor) shuffleDescriptor);
} else if (shuffleDescriptorClass.equals(shuffleDescriptor.getClass())) {
return functionOfKnownDescriptor.apply((SD) shuffleDescriptor);
} else {
throw new IllegalArgumentException(String.format(
"Unsupported ShuffleDescriptor type <%s>, only <%s> is supported",
shuffleDescriptor.getClass().getName(),
shuffleDescriptorClass.getName()));
}
}
}