de.ks.imagecache.Images.java Source code

Introduction

Here is the source code for de.ks.imagecache.Images.java

Source

/*
 * Copyright [2014] [Christian Loehnert, krampenschiesser@gmail.com]
 * 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 de.ks.imagecache;

import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.util.concurrent.UncheckedExecutionException;
import javafx.scene.image.Image;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;

/**
 *
 */
public class Images {
    private static final Logger log = LoggerFactory.getLogger(Images.class);
    private static final Images instance = new Images();

    private final LoadingCache<String, Image> cache;
    private final CacheLoader<? super String, Image> loader;

    private Images() {
        loader = new ImageLoader();
        cache = CacheBuilder.newBuilder()//
                .initialCapacity(300)//
                .softValues()//
                .build(loader);
    }

    public static Image get(String imagePath) {
        return instance.getImage(imagePath);
    }

    public static CompletableFuture<Image> later(String imagePath, ExecutorService executorService) {
        return instance.loadAsync(imagePath, executorService);
    }

    protected Image getImage(String imagePath) {
        try {
            return cache.get(imagePath);
        } catch (ExecutionException | UncheckedExecutionException e) {
            log.error("Could not load image {}", imagePath, e);
            return null;
        }
    }

    public CompletableFuture<Image> loadAsync(String imagePath, ExecutorService executorService) {
        return CompletableFuture.supplyAsync(() -> getImage(imagePath), executorService);
    }
}