CapedwarfImagesService.java

/*
 * JBoss, Home of Professional Open Source.
 * Copyright 2011, Red Hat, Inc., and individual contributors
 * as indicated by the @author tags. See the copyright.txt file in the
 * distribution for a full listing of individual contributors.
 *
 * This is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as
 * published by the Free Software Foundation; either version 2.1 of
 * the License, or (at your option) any later version.
 *
 * This software 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this software; if not, write to the Free
 * Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
 * 02110-1301 USA, or see the FSF site: http://www.fsf.org.
 */

package org.jboss.capedwarf.images;

import java.awt.image.BufferedImage;
import java.util.Collection;
import java.util.concurrent.Callable;
import java.util.concurrent.Future;

import com.google.appengine.api.blobstore.BlobKey;
import com.google.appengine.api.files.AppEngineFile;
import com.google.appengine.api.files.FileServiceFactory;
import com.google.appengine.api.images.Composite;
import com.google.appengine.api.images.Image;
import com.google.appengine.api.images.ImagesServiceFactory;
import com.google.appengine.api.images.InputSettings;
import com.google.appengine.api.images.OutputSettings;
import com.google.appengine.api.images.ServingUrlOptions;
import com.google.appengine.api.images.Transform;
import org.infinispan.AdvancedCache;
import org.jboss.capedwarf.common.app.Application;
import org.jboss.capedwarf.common.async.Wrappers;
import org.jboss.capedwarf.common.infinispan.InfinispanUtils;
import org.jboss.capedwarf.files.ExposedFileService;
import org.jboss.capedwarf.images.transform.CapedwarfTransform;
import org.jboss.capedwarf.images.transform.CapedwarfTransformFactory;
import org.jboss.capedwarf.images.util.ImageUtils;
import org.jboss.capedwarf.shared.config.CacheName;

/**
 * @author <a href="mailto:marko.luksa@gmail.com">Marko Luksa</a>
 * @author <a href="mailto:ales.justin@jboss.org">Ales Justin</a>
 */
public class CapedwarfImagesService implements ExposedImagesService {

    private final AdvancedCache<ImageId, BlobKey> imageIdStore;
    private final AdvancedCache<BlobKey, ImageId> blobKeyStore;
    private ExposedFileService fileService = (ExposedFileService) FileServiceFactory.getFileService();

    public CapedwarfImagesService() {
        String appId = Application.getAppId();
        imageIdStore = InfinispanUtils.<ImageId, BlobKey>getCache(appId, CacheName.DIST).getAdvancedCache();
        blobKeyStore = InfinispanUtils.<BlobKey, ImageId>getCache(appId, CacheName.DIST).getAdvancedCache();
    }

    public Image applyTransform(Transform transform, Image image) {
        return applyTransform(transform, image, OutputEncoding.PNG);
    }

    public Image applyTransform(Transform transform, Image image, OutputEncoding outputEncoding) {
        return applyTransform(transform, image, new OutputSettings(outputEncoding));
    }

    public Image applyTransform(Transform transform, Image image, OutputSettings outputSettings) {
        return applyTransform(transform, image, new InputSettings(), outputSettings);
    }

    public Image applyTransform(Transform transform, Image image, InputSettings inputSettings, OutputSettings outputSettings) {
        BufferedImage bufferedImage = convertToBufferedImage(image);
        BufferedImage transformedBufferedImage = applyTransform(transform, bufferedImage);
        return createImage(transformedBufferedImage, outputSettings);
    }

    private Image createImage(BufferedImage transformedBufferedImage, OutputSettings outputSettings) {
        byte[] transformedImageData = getByteArray(transformedBufferedImage, outputSettings);
        return ImagesServiceFactory.makeImage(transformedImageData);
    }

    public static BufferedImage applyTransform(Transform transform, BufferedImage bufferedImage) {
        CapedwarfTransform capedwarfTransform = CapedwarfTransformFactory.createJBossTransform(transform);
        return capedwarfTransform.applyTo(bufferedImage);
    }

    private BufferedImage convertToBufferedImage(Image image) {
        return ImageUtils.convertToBufferedImage(image.getImageData());
    }


    public Future<Image> applyTransformAsync(Transform transform, Image image) {
        return applyTransformAsync(transform, image, OutputEncoding.PNG);
    }

    public Future<Image> applyTransformAsync(Transform transform, Image image, OutputEncoding outputEncoding) {
        return applyTransformAsync(transform, image, new OutputSettings(outputEncoding));
    }

    public Future<Image> applyTransformAsync(Transform transform, Image image, OutputSettings outputSettings) {
        return applyTransformAsync(transform, image, new InputSettings(), outputSettings);
    }

    public Future<Image> applyTransformAsync(final Transform transform, final Image image, final InputSettings inputSettings, final OutputSettings outputSettings) {
        return Wrappers.future(new Callable<Image>() {
            public Image call() throws Exception {
                return applyTransform(transform, image, inputSettings, outputSettings);
            }
        });
    }

    public Image composite(Collection<Composite> composites, int width, int height, long color) {
        return composite(composites, width, height, color, OutputEncoding.PNG);
    }

    public Image composite(Collection<Composite> composites, int width, int height, long color, OutputEncoding outputEncoding) {
        return composite(composites, width, height, color, new OutputSettings(outputEncoding));
    }

    public Image composite(Collection<Composite> composites, int width, int height, long color, OutputSettings outputSettings) {
        CompositeImageBuilder compositeImageBuilder = new CompositeImageBuilder(composites, width, height, color);
        BufferedImage image = compositeImageBuilder.createBufferedImage();
        return createImage(image, outputSettings);
    }

    public int[][] histogram(Image image) {
        return ImageUtils.histogram(convertToBufferedImage(image));
    }


    public String getServingUrl(ServingUrlOptions options) {
        ServingUrlOptionsHelper helper = new ServingUrlOptionsHelper(options);
        return getServingUrl(
            helper.getBlobKey(),
            helper.hasImageSize() ? helper.getImageSize() : -1,
            helper.hasCrop() && helper.getCrop(),
            helper.hasSecureUrl() && helper.getSecureUrl());
    }

    public String getServingUrl(BlobKey blobKey) {
        return getServingUrl(blobKey, false);
    }

    public String getServingUrl(BlobKey blobKey, boolean secureUrl) {
        return getServingUrl(blobKey, -1, false, secureUrl);
    }

    public String getServingUrl(BlobKey blobKey, int imageSize, boolean crop) {
        return getServingUrl(blobKey, imageSize, crop, false);
    }

    public String getServingUrl(BlobKey blobKey, int imageSize, boolean crop, boolean secureUrl) {
        if (blobKey == null) {
            throw new IllegalArgumentException("Null blob key!");
        }
        ImageId imageId = getImageId(blobKey);
        if (imageId == null) {
            AppEngineFile file = fileService.getBlobFile(blobKey);
            if (!fileService.exists(file)) {
                throw new IllegalArgumentException("Could not read blob");
            }
            imageId = ImageId.newRandomImageId();
            imageIdStore.put(imageId, blobKey);
            blobKeyStore.put(blobKey, imageId);
        }
        return ImageServlet.getServingUrl(imageId, imageSize, crop, secureUrl);
    }

    public void deleteServingUrl(BlobKey blobKey) {
        ImageId imageId = blobKeyStore.remove(blobKey);
        if (imageId != null) {
            imageIdStore.remove(imageId);
        }
    }

    private byte[] getByteArray(BufferedImage bufferedImage, OutputSettings outputSettings) {
        String formatName = getFormatName(outputSettings.getOutputEncoding());

        return ImageUtils.getByteArray(bufferedImage, formatName);
    }

    private String getFormatName(OutputEncoding outputEncoding) {
        switch (outputEncoding) {
            case PNG:
                return "PNG";
            case JPEG:
                return "JPG";
            case WEBP:
                return "WEBP";
            default:
                throw new IllegalArgumentException("Unsupported OutputEncoding " + outputEncoding);
        }
    }

    @Override
    public BlobKey getBlobKey(ImageId imageId) {
        return imageIdStore.get(imageId);
    }

    @Override
    public ImageId getImageId(BlobKey blobKey) {
        return blobKeyStore.get(blobKey);
    }
}