org.craftercms.social.services.impl.SupportDataAccessImpl.java Source code

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Here is the source code for org.craftercms.social.services.impl.SupportDataAccessImpl.java

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/*
 * Copyright (C) 2007-2013 Crafter Software Corporation.
 *
 * This program 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.
 *
 * This program 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 this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.craftercms.social.services.impl;

import java.io.IOException;
import java.io.OutputStream;
import java.util.List;

import javax.servlet.ServletOutputStream;
import javax.servlet.http.HttpServletResponse;

import org.bson.types.ObjectId;
import org.craftercms.social.services.SupportDataAccess;
import org.craftercms.social.util.support.ResultParser;
import org.craftercms.social.util.web.Attachment;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.dao.DataRetrievalFailureException;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.mapping.Document;
import org.springframework.data.mongodb.core.mapreduce.MapReduceResults;
import org.springframework.data.mongodb.core.query.BasicQuery;
import org.springframework.stereotype.Service;
import org.springframework.web.multipart.MultipartFile;

import com.mongodb.gridfs.GridFS;
import com.mongodb.gridfs.GridFSDBFile;
import com.mongodb.gridfs.GridFSInputFile;

@Service
public class SupportDataAccessImpl implements SupportDataAccess {

    private final transient Logger log = LoggerFactory.getLogger(SupportDataAccessImpl.class);
    @Autowired
    private MongoTemplate mongoTemplate;

    /*
     * (non-Javadoc)
     * 
     * @see
     * org.craftercms.social.repositories.SupportDataAccess#saveFile(
     * org.springframework.web.multipart.MultipartFile)
     */
    @Override
    public ObjectId saveFile(MultipartFile file) throws IOException {
        GridFS gFS = new GridFS(mongoTemplate.getDb());
        GridFSInputFile gFSInputFile = gFS.createFile(file.getInputStream());
        gFSInputFile.setFilename(file.getOriginalFilename());
        gFSInputFile.setContentType(file.getContentType());
        gFSInputFile.save();
        return (ObjectId) gFSInputFile.getId();
    }

    @Override
    public void streamAttachment(ObjectId attachmentId, HttpServletResponse response) {
        try {
            GridFS gFS = new GridFS(mongoTemplate.getDb());
            GridFSDBFile file = gFS.find(attachmentId);
            if (file != null) {
                response.setContentType(file.getContentType());
                response.setContentLength((int) file.getLength());
                response.setHeader("Content-Disposition", "attachment; filename=" + file.getFilename());
                file.writeTo(response.getOutputStream());

            } else {
                log.error("Attachment with id {} does not exist", attachmentId);
                response.sendError(HttpServletResponse.SC_INTERNAL_SERVER_ERROR);
            }

        } catch (Exception e) {
            log.error("Can not stream file.", e);
        }
    }

    @Override
    public void removeAttachment(ObjectId attachmentId) {
        try {
            GridFS gFS = new GridFS(mongoTemplate.getDb());
            gFS.remove(attachmentId);
        } catch (Exception e) {
            log.error("Can not stream file.", e);
        }
    }

    @Override
    public Attachment getAttachment(ObjectId attachmentId) {
        try {
            GridFS gFS = new GridFS(mongoTemplate.getDb());
            GridFSDBFile file = gFS.find(attachmentId);
            if (file != null) {
                Attachment attach = null;
                attach = new Attachment(file.getContentType(), file.getLength(), file.getFilename());
                return attach;
            } else {
                log.error("Attachment with id {} does not exist", attachmentId);
                throw new DataRetrievalFailureException(
                        "Attachment with id" + attachmentId.toString() + " does not exist");
            }
        } catch (Exception e) {
            log.error("Could not get attachment.", e);
            return null;
        }
    }

    @Override
    public <T> List<T> distinct(Class<?> entity, String key, Class<T> resultClass) {
        String inputCollectionName = entity.getSimpleName();
        Document documentAnotation = entity.getAnnotation(Document.class);
        if (documentAnotation != null) {
            inputCollectionName = documentAnotation.collection();
        }
        mongoTemplate.getDb().command(String.format("{ distinct : '%s', key : '%s' }", inputCollectionName, key));

        return null;
    }

    @Override
    public List<?> mapReduce(Class<?> entity, String mapFunction, String reduceFunction, ResultParser parser) {
        String inputCollectionName = entity.getSimpleName();
        Document documentAnotation = entity.getAnnotation(Document.class);
        if (documentAnotation != null) {
            inputCollectionName = documentAnotation.collection();
        }
        MapReduceResults<?> r = mongoTemplate.mapReduce(inputCollectionName, mapFunction, reduceFunction, entity);
        return parser.parseList(r.getRawResults().toMap());
    }

    @Override
    public List<?> mapReduceWithQuery(Class<?> entity, String query, String mapFunction, String reduceFunction,
            ResultParser parser) {
        String inputCollectionName = entity.getSimpleName();
        Document documentAnotation = entity.getAnnotation(Document.class);
        if (documentAnotation != null) {
            inputCollectionName = documentAnotation.collection();
        }
        MapReduceResults<?> r = mongoTemplate.mapReduce(new BasicQuery(query), inputCollectionName, mapFunction,
                reduceFunction, entity);
        return parser.parseList(r.getRawResults().toMap());
    }

}