org.graylog2.indexer.guava.FunctionCacheLoader Maven / Gradle / Ivy
/**
* This file is part of Graylog.
*
* Graylog is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Graylog is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with Graylog. If not, see .
*/
package org.graylog2.indexer.guava;
import com.google.common.cache.CacheLoader;
import java.util.function.Function;
import static java.util.Objects.requireNonNull;
public class FunctionCacheLoader extends CacheLoader {
private final Function loadingFunction;
public FunctionCacheLoader(Function loadingFunction) {
this.loadingFunction = requireNonNull(loadingFunction, "loadingFunction must not be null");
}
@Override
public V load(K key) throws Exception {
return loadingFunction.apply(key);
}
}