eu.wisebed.wiseui.server.rpc.ImageUploadServiceImpl.java Source code

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Here is the source code for eu.wisebed.wiseui.server.rpc.ImageUploadServiceImpl.java

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/**
 * Copyright (C) 2011 Universitt zu Lbeck, Institut fr Telematik (ITM),
 *                             Research Academic Computer Technology Institute (RACTI)
 *
 * 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 eu.wisebed.wiseui.server.rpc;

import java.io.File;
import java.io.FileInputStream;
import java.util.List;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.fileupload.FileItem;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import com.google.inject.Singleton;

import eu.wisebed.wiseui.api.PersistenceService;
import eu.wisebed.wiseui.persistence.PersistenceServiceProvider;
import eu.wisebed.wiseui.shared.dto.BinaryImage;

import gwtupload.server.UploadAction;
import gwtupload.server.exceptions.UploadActionException;

@Singleton
public class ImageUploadServiceImpl extends UploadAction {

    private static final long serialVersionUID = 8765045952525138205L;

    private final Logger LOGGER = LoggerFactory.getLogger(ImageUploadServiceImpl.class.getName());

    private final PersistenceService persistenceService = PersistenceServiceProvider.newPersistenceService();

    /**
     * Override executeAction to save the received files in a custom place
     * and delete these items from session
     */
    @Override
    public String executeAction(HttpServletRequest request, List<FileItem> sessionFiles)
            throws UploadActionException {
        String response = "";
        int cont = 0;

        for (FileItem item : sessionFiles) {
            if (false == item.isFormField()) {
                cont++;
                try {
                    // Save a temporary file in the default system temp directory
                    File uploadedFile = File.createTempFile("upload-", ".bin");

                    // write item to a file
                    item.write(uploadedFile);

                    // open and read content from file stream
                    FileInputStream in = new FileInputStream(uploadedFile);
                    byte fileContent[] = new byte[(int) uploadedFile.length()];
                    in.read(fileContent);

                    // store content in persistance
                    BinaryImage image = new BinaryImage();
                    image.setFileName(item.getName());
                    image.setFileSize(item.getSize());
                    image.setContent(fileContent);
                    image.setContentType(item.getContentType());
                    LOGGER.info("Storing image: [Filename-> " + item.getName() + " ]");
                    persistenceService.storeBinaryImage(image);

                    // Compose an xml message with the full file information
                    // which can be parsed in client side
                    response += "<file-" + cont + "-field>" + item.getFieldName() + "</file-" + cont + "-field>\n";
                    response += "<file-" + cont + "-name>" + item.getName() + "</file-" + cont + "-name>\n";
                    response += "<file-" + cont + "-size>" + item.getSize() + "</file-" + cont + "-size>\n";
                    response += "<file-" + cont + "-type>" + item.getContentType() + "</file-" + cont + "-type>\n";

                } catch (Exception e) {
                    throw new UploadActionException(e);
                }
            }
        }

        // Remove files from session because we have a copy of them
        removeSessionFileItems(request);

        // set the count of files
        response += "<file-count>" + cont + "</file-count>\n";

        // Send information of the received files to the client
        return "<response>\n" + response + "</response>\n";
    }

    public void removeItem(HttpServletRequest request, String fieldName) throws UploadActionException {
        // TODO implement this when required
    }
}