Example usage for com.mongodb.gridfs GridFSInputFile getId

List of usage examples for com.mongodb.gridfs GridFSInputFile getId

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Introduction

In this page you can find the example usage for com.mongodb.gridfs GridFSInputFile getId.

Prototype

public Object getId()

Source Link

Document

Gets the id.

Usage

From source file:it.marcoberri.mbmeteo.action.chart.Get.java

License:Apache License

/**
 * Processes requests for both HTTP/*from w  ww.j  av a  2s  .com*/
 * <code>GET</code> and
 * <code>POST</code> methods.
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    log.debug("start : " + this.getClass().getName());

    final HashMap<String, String> params = getParams(request.getParameterMap());
    final Integer dimy = Default.toInteger(params.get("dimy"), 600);
    final Integer dimx = Default.toInteger(params.get("dimx"), 800);
    final String from = Default.toString(params.get("from") + " 00:00:00", "1970-01-01 00:00:00");
    final String to = Default.toString(params.get("to") + " 23:59:00", "2030-01-01 23:59:00");
    final String field = Default.toString(params.get("field"), "outdoorTemperature");

    request.getSession().setAttribute("from", params.get("from"));
    request.getSession().setAttribute("to", params.get("to"));

    final String cacheKey = getCacheKey(params);

    if (cacheReadEnable) {
        final Query q = ds.find(Cache.class);
        q.filter("cacheKey", cacheKey).filter("servletName", this.getClass().getName());

        final Cache c = (Cache) q.get();

        if (c == null) {
            log.info("cacheKey:" + cacheKey + " on servletName: " + this.getClass().getName() + " not found");
        }

        if (c != null) {
            log.debug("get file from cache id: " + c.getGridId());
            final GridFSDBFile imageForOutput = MongoConnectionHelper.getGridFS()
                    .findOne(new ObjectId(c.getGridId()));
            if (imageForOutput != null) {

                ds.save(c);

                try {
                    response.setHeader("Content-Length", "" + imageForOutput.getLength());
                    response.setHeader("Content-Disposition",
                            "inline; filename=\"" + imageForOutput.getFilename() + "\"");
                    final OutputStream out = response.getOutputStream();
                    final InputStream in = imageForOutput.getInputStream();
                    final byte[] content = new byte[(int) imageForOutput.getLength()];
                    in.read(content);
                    out.write(content);
                    in.close();
                    out.close();
                    return;
                } catch (final IOException e) {
                    log.error(e);
                }

            } else {
                log.error("file not in db");
            }
        }
    }

    final String titleChart = ChartEnumHelper.getByName(field).getTitle();
    final String umChart = ChartEnumHelper.getByName(field).getUm();
    final Query q = ds.createQuery(Meteolog.class);
    final Date dFrom = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", from);
    final Date dTo = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", to);

    q.disableValidation().filter("time >=", dFrom).filter("time <=", dTo);

    final List<Meteolog> meteoLogList = q.asList();
    final TimeSeries series = new TimeSeries(umChart);

    for (Meteolog m : meteoLogList) {
        final Millisecond t = new Millisecond(m.getTime());
        try {
            //violenza di una reflection
            final Method method = m.getClass().getMethod(ChartEnumHelper.getByName(field).getMethod());
            final Number n = (Number) method.invoke(m);
            series.add(t, n);
        } catch (final NoSuchMethodException ex) {
            log.error(ex);
        } catch (final InvocationTargetException ex) {
            log.error(ex);
        } catch (final IllegalAccessException ex) {
            log.error(ex);
        } catch (final SecurityException ex) {
            log.error(ex);
        }

    }

    final TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(series);

    final JFreeChart chart = ChartFactory.createTimeSeriesChart(titleChart, "", umChart, dataset, false, false,
            false);
    final XYPlot plot = (XYPlot) chart.getPlot();
    final DateAxis axis = (DateAxis) plot.getDomainAxis();
    axis.setDateFormatOverride(new SimpleDateFormat("dd-MM-yyyy HH:mm"));
    axis.setVerticalTickLabels(true);

    if (field.toUpperCase().indexOf("PRESSURE") != -1) {
        plot.getRangeAxis().setRange(chartPressureMin, chartPressureMax);
    }

    final File f = File.createTempFile("mbmeteo", ".jpg");
    ChartUtilities.saveChartAsJPEG(f, chart, dimx, dimy);

    try {

        if (cacheWriteEnable) {

            final GridFSInputFile gfsFile = MongoConnectionHelper.getGridFS().createFile(f);
            gfsFile.setFilename(f.getName());
            gfsFile.save();

            final Cache c = new Cache();
            c.setServletName(this.getClass().getName());
            c.setCacheKey(cacheKey);
            c.setGridId(gfsFile.getId().toString());

            ds.save(c);

        }

        response.setContentType("image/jpeg");
        response.setHeader("Content-Length", "" + f.length());
        response.setHeader("Content-Disposition", "inline; filename=\"" + f.getName() + "\"");
        final OutputStream out = response.getOutputStream();
        final FileInputStream in = new FileInputStream(f.toString());
        final int size = in.available();
        final byte[] content = new byte[size];
        in.read(content);
        out.write(content);
        in.close();
        out.close();
    } catch (final IOException e) {
        log.error(e);
    } finally {
        f.delete();
    }

}

From source file:it.marcoberri.mbmeteo.action.chart.GetMinAndMax.java

License:Apache License

/**
 * Processes requests for both HTTP/*from ww w .  j  a v  a 2s  . co  m*/
 * <code>GET</code> and
 * <code>POST</code> methods.
 *
 * @param request servlet request
 * @param response servlet response
 * @throws ServletException if a servlet-specific error occurs
 * @throws IOException if an I/O error occurs
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    log.debug("start : " + this.getClass().getName());

    final HashMap<String, String> params = getParams(request.getParameterMap());
    final Integer dimy = Default.toInteger(params.get("dimy"), 600);
    final Integer dimx = Default.toInteger(params.get("dimx"), 800);
    final String from = Default.toString(params.get("from") + " 00:00:00", "1970-01-01 00:00:00");
    final String to = Default.toString(params.get("to") + " 23:59:00", "2030-01-01 23:59:00");
    final String field = Default.toString(params.get("field"), "outdoorTemperature");
    final String period = Default.toString(params.get("period"), "day");

    request.getSession().setAttribute("from", params.get("from"));
    request.getSession().setAttribute("to", params.get("to"));

    final String cacheKey = getCacheKey(params);

    if (cacheReadEnable) {

        final Query q = ds.find(Cache.class);
        q.filter("cacheKey", cacheKey).filter("servletName", this.getClass().getName());

        final Cache c = (Cache) q.get();

        if (c == null) {
            log.info("cacheKey:" + cacheKey + " on servletName: " + this.getClass().getName() + " not found");
        }

        if (c != null) {
            final GridFSDBFile imageForOutput = MongoConnectionHelper.getGridFS()
                    .findOne(new ObjectId(c.getGridId()));
            if (imageForOutput != null) {
                ds.save(c);

                try {
                    response.setHeader("Content-Length", "" + imageForOutput.getLength());
                    response.setHeader("Content-Disposition",
                            "inline; filename=\"" + imageForOutput.getFilename() + "\"");
                    final OutputStream out = response.getOutputStream();
                    final InputStream in = imageForOutput.getInputStream();
                    final byte[] content = new byte[(int) imageForOutput.getLength()];
                    in.read(content);
                    out.write(content);
                    in.close();
                    out.close();
                    return;
                } catch (Exception e) {
                    log.error(e);
                }

            } else {
                log.error("file not in db");
            }
        }
    }

    final String formatIn = getFormatIn(period);
    final String formatOut = getFormatOut(period);

    final Query q = ds.createQuery(MapReduceMinMax.class).disableValidation();

    final Date dFrom = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", from);
    final Date dTo = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", to);

    final List<Date> datesIn = getRangeDate(dFrom, dTo);
    final HashSet<String> datesInString = new HashSet<String>();

    for (Date d : datesIn) {
        datesInString.add(DateTimeUtil.dateFormat(formatIn, d));
    }

    if (datesIn != null && !datesIn.isEmpty()) {
        q.filter("_id in", datesInString);
    }
    q.order("_id");

    final List<MapReduceMinMax> mapReduceResult = q.asList();
    final TimeSeries serieMin = new TimeSeries("Min");
    final TimeSeries serieMax = new TimeSeries("Max");

    for (MapReduceMinMax m : mapReduceResult) {
        try {

            final Date tmpDate = DateTimeUtil.getDate(formatIn, m.getId().toString());
            if (tmpDate == null) {
                continue;
            }

            final Millisecond t = new Millisecond(tmpDate);

            ChartEnumMinMaxHelper chartEnum = ChartEnumMinMaxHelper.getByFieldAndType(field, "min");
            Method method = m.getClass().getMethod(chartEnum.getMethod());
            Number n = (Number) method.invoke(m);
            serieMin.add(t, n);

            chartEnum = ChartEnumMinMaxHelper.getByFieldAndType(field, "max");
            method = m.getClass().getMethod(chartEnum.getMethod());
            n = (Number) method.invoke(m);
            serieMax.add(t, n);

        } catch (IllegalAccessException ex) {
            log.error(ex);
        } catch (IllegalArgumentException ex) {
            log.error(ex);
        } catch (InvocationTargetException ex) {
            log.error(ex);
        } catch (NoSuchMethodException ex) {
            log.error(ex);
        } catch (SecurityException ex) {
            log.error(ex);
        }
    }

    final ChartEnumMinMaxHelper chartData = ChartEnumMinMaxHelper.getByFieldAndType(field, "min");

    final TimeSeriesCollection dataset = new TimeSeriesCollection();
    dataset.addSeries(serieMin);
    dataset.addSeries(serieMax);

    final JFreeChart chart = ChartFactory.createTimeSeriesChart("Max/Min", "", chartData.getUm(), dataset, true,
            false, false);
    final XYPlot plot = (XYPlot) chart.getPlot();
    final DateAxis axis = (DateAxis) plot.getDomainAxis();
    axis.setDateFormatOverride(new SimpleDateFormat(formatOut));

    axis.setVerticalTickLabels(true);

    if (field.toUpperCase().indexOf("PRESSURE") != -1) {
        plot.getRangeAxis().setRange(chartPressureMin, chartPressureMax);
    }

    final File f = File.createTempFile("mbmeteo", ".jpg");
    ChartUtilities.saveChartAsJPEG(f, chart, dimx, dimy);

    try {

        if (cacheWriteEnable) {
            final GridFSInputFile gfsFile = MongoConnectionHelper.getGridFS().createFile(f);
            gfsFile.setFilename(f.getName());
            gfsFile.save();

            final Cache c = new Cache();
            c.setServletName(this.getClass().getName());
            c.setCacheKey(cacheKey);
            c.setGridId(gfsFile.getId().toString());

            ds.save(c);

        }

        response.setContentType("image/jpeg");
        response.setHeader("Content-Length", "" + f.length());
        response.setHeader("Content-Disposition", "inline; filename=\"" + f.getName() + "\"");
        final OutputStream out = response.getOutputStream();
        final FileInputStream in = new FileInputStream(f.toString());
        final int size = in.available();
        final byte[] content = new byte[size];
        in.read(content);
        out.write(content);
        in.close();
        out.close();
    } catch (Exception e) {
        log.error(e);
    } finally {
        f.delete();
    }

}

From source file:it.marcoberri.mbmeteo.action.chart.GetMinOrMax.java

License:Apache License

/**
 *
 * @param request/*from   w  w  w. j a  v  a2 s.  com*/
 * @param response
 * @throws ServletException
 * @throws IOException
 */
protected void processRequest(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {

    log.debug("start : " + this.getClass().getName());

    final HashMap<String, String> params = getParams(request.getParameterMap());
    final Integer dimy = Default.toInteger(params.get("dimy"), 600);
    final Integer dimx = Default.toInteger(params.get("dimx"), 800);
    final String from = Default.toString(params.get("from") + " 00:00:00", "1970-01-01 00:00:00");
    final String to = Default.toString(params.get("to") + " 23:59:00", "2030-01-01 23:59:00");
    final String field = Default.toString(params.get("field"), "outdoorTemperature");
    final String period = Default.toString(params.get("period"), "day");
    final String type = Default.toString(params.get("type"), "min");

    request.getSession().setAttribute("from", params.get("from"));
    request.getSession().setAttribute("to", params.get("to"));

    final String cacheKey = getCacheKey(params);

    if (cacheReadEnable) {

        final Query q = ds.find(Cache.class);
        q.filter("cacheKey", cacheKey).filter("servletName", this.getClass().getName());

        final Cache c = (Cache) q.get();

        if (c == null) {
            log.info("cacheKey:" + cacheKey + " on servletName: " + this.getClass().getName() + " not found");
        }

        if (c != null) {
            final GridFSDBFile imageForOutput = MongoConnectionHelper.getGridFS()
                    .findOne(new ObjectId(c.getGridId()));
            if (imageForOutput != null) {
                ds.save(c);

                try {
                    response.setHeader("Content-Length", "" + imageForOutput.getLength());
                    response.setHeader("Content-Disposition",
                            "inline; filename=\"" + imageForOutput.getFilename() + "\"");
                    final OutputStream out = response.getOutputStream();
                    final InputStream in = imageForOutput.getInputStream();
                    final byte[] content = new byte[(int) imageForOutput.getLength()];
                    in.read(content);
                    out.write(content);
                    in.close();
                    out.close();
                    return;
                } catch (Exception e) {
                    log.error(e);
                }

            } else {
                log.error("file not in db");
            }
        }
    }

    final Query q = ds.createQuery(MapReduceMinMax.class).disableValidation();
    final Date dFrom = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", from);
    final Date dTo = DateTimeUtil.getDate("yyyy-MM-dd hh:mm:ss", to);

    final String formatIn = getFormatIn(period);
    final String formatOut = getFormatOut(period);

    final List<Date> datesIn = getRangeDate(dFrom, dTo);
    final HashSet<String> datesInString = new HashSet<String>();

    for (Date d : datesIn) {
        datesInString.add(DateTimeUtil.dateFormat(formatIn, d));
    }

    if (datesIn != null && !datesIn.isEmpty()) {
        q.filter("_id in", datesInString);
    }
    q.order("_id");

    final List<MapReduceMinMax> mapReduceResult = q.asList();

    final DefaultCategoryDataset dataset = new DefaultCategoryDataset();
    ChartEnumMinMaxHelper chartEnum = ChartEnumMinMaxHelper.getByFieldAndType(field, type);

    for (MapReduceMinMax m : mapReduceResult) {
        try {
            final Date tmpDate = DateTimeUtil.getDate(formatIn, m.getId().toString());

            if (tmpDate == null) {
                continue;
            }

            final Method method = m.getClass().getMethod(chartEnum.getMethod());
            final Number n = (Number) method.invoke(m);
            dataset.addValue(n, chartEnum.getType(), DateTimeUtil.dateFormat(formatOut, tmpDate));

        } catch (IllegalAccessException ex) {
            log.error(ex);
        } catch (IllegalArgumentException ex) {
            log.error(ex);
        } catch (InvocationTargetException ex) {
            log.error(ex);
        } catch (NoSuchMethodException ex) {
            log.error(ex);
        } catch (SecurityException ex) {
            log.error(ex);
        }
    }

    final JFreeChart chart = ChartFactory.createBarChart(chartEnum.getTitle(), // chart title
            "", // domain axis label
            chartEnum.getUm(), // range axis label
            dataset, // data
            PlotOrientation.VERTICAL, // orientation
            false, // include legend
            true, // tooltips?
            false // URLs?
    );

    final CategoryPlot xyPlot = (CategoryPlot) chart.getPlot();
    final CategoryAxis domain = xyPlot.getDomainAxis();

    if (field.toUpperCase().indexOf("PRESSURE") != -1) {
        xyPlot.getRangeAxis().setRange(chartPressureMin, chartPressureMax);
    } else {
        xyPlot.getRangeAxis().setAutoRange(true);
    }

    domain.setCategoryLabelPositions(CategoryLabelPositions.DOWN_90);

    final File f = File.createTempFile("mbmeteo", ".jpg");
    ChartUtilities.saveChartAsJPEG(f, chart, dimx, dimy);

    try {

        if (cacheWriteEnable) {
            final GridFSInputFile gfsFile = MongoConnectionHelper.getGridFS().createFile(f);
            gfsFile.setFilename(f.getName());
            gfsFile.save();

            final Cache c = new Cache();
            c.setServletName(this.getClass().getName());
            c.setCacheKey(cacheKey);
            c.setGridId(gfsFile.getId().toString());

            ds.save(c);

        }

        response.setContentType("image/jpeg");
        response.setHeader("Content-Length", "" + f.length());
        response.setHeader("Content-Disposition", "inline; filename=\"" + f.getName() + "\"");
        final OutputStream out = response.getOutputStream();
        final FileInputStream in = new FileInputStream(f.toString());
        final int size = in.available();
        final byte[] content = new byte[size];
        in.read(content);
        out.write(content);
        in.close();
        out.close();
    } catch (Exception e) {
        log.error(e);
    } finally {
        boolean delete = f.delete();
    }

}

From source file:me.philnate.textmanager.entities.Document.java

License:Open Source License

public static Document loadAndSave(File file) {
    GridFSInputFile gFile;
    try {// ww  w.j  a  va2 s . co m
        gFile = docs.createFile(file);
        gFile.save();
        LOG.debug(format("Reading file  '%s' for new Document", file.getAbsolutePath()));
        Document doc = new Document();
        doc.setDocument((ObjectId) gFile.getId()).setTitle(file.getName());
        return doc.setWordCount(WordCount.countFile(file));
    } catch (IOException e1) {
        return null;
    }
}

From source file:org.alfresco.serializers.MongoFilesImpl.java

License:Open Source License

@Override
public DBObject createFile(long nodeId, long nodeVersion, String propertyName, byte[] bytes) {
    GridFSInputFile f = myFS.createFile(bytes);
    f.put("nodeId", nodeId);
    f.put("nodeVersion", nodeVersion);
    f.put("propertyQName", propertyName);
    f.save();/*  w w w.j  a  v  a 2  s . c  om*/
    DBObject dbObject = BasicDBObjectBuilder.start("type", "serialized").add("id", f.getId()).get();
    return dbObject;
}

From source file:org.bananaforscale.cormac.dao.gridfs.GridFsDataServiceImpl.java

License:Apache License

/**
 * Saves a file to the database by file name. This is used during a form upload. We use tika to
 * determine the content type.//  w  w  w. ja v a  2s  .  c  o  m
 *
 * TODO: Refactor this mess
 *
 * @param databaseName the name of the database
 * @param bucketName the name of the bucket
 * @param fileName the name of the file
 * @param overwrite whether to overwrite an existing file with the same name
 * @param stream the file byte stream
 * @return the Mongo ID of the file
 * @throws DatasourceException
 * @throws ExistsException
 * @throws NotFoundException
 */
@Override
public String addByForm(String databaseName, String bucketName, String fileName, boolean overwrite,
        InputStream stream) throws DatasourceException, ExistsException, NotFoundException {
    String fileId = null;
    try {
        if (!databaseExists(databaseName)) {
            throw new NotFoundException("The database doesn't exist in the datasource");
        }
        DB mongoDatabase = mongoClient.getDB(databaseName);
        GridFS gfsBucket = new GridFS(mongoDatabase, bucketName);
        GridFSDBFile gfsFile = gfsBucket.findOne(fileName);
        if (gfsFile == null) {
            // the file does not exist -- create
            GridFSInputFile dbFile = gfsBucket.createFile(stream, fileName);
            dbFile.setContentType(tika.detect(fileName));
            dbFile.save();
            fileId = dbFile.getId().toString();
        } else {
            // the file exists
            if (overwrite) {
                // overwrite the existing file
                gfsBucket.remove(gfsFile);
                GridFSInputFile inputFile = gfsBucket.createFile(stream, fileName);
                inputFile.setContentType(tika.detect(fileName));
                inputFile.save();
                fileId = inputFile.getId().toString();
            } else {
                throw new ExistsException("The file already exists in the bucket");
            }
        }
    } catch (MongoException ex) {
        logger.error("Could not persist entity to bucket", ex);
        throw new DatasourceException("Could not persist file to bucket");
    }
    if (fileId == null || fileId.isEmpty()) {
        throw new DatasourceException("Could not persist file to bucket");
    }
    return fileId;
}

From source file:org.bananaforscale.cormac.dao.gridfs.GridFsDataServiceImpl.java

License:Apache License

/**
 * Saves a document to the database by file name. If the document already exists this request
 * will be dropped and the existing file will not be overwritten.
 *
 * @param databaseName the database/*from w  w  w  .ja  va  2 s .c o m*/
 * @param bucketName the bucket
 * @param fileName the file name
 * @param inputStream the binary payload
 * @return the identifier of the file
 * @throws DatasourceException
 * @throws ExistsException
 * @throws NotFoundException
 */
@Override
public String addByFileName(String databaseName, String bucketName, String fileName, InputStream inputStream)
        throws DatasourceException, ExistsException, NotFoundException {
    try {
        if (!databaseExists(databaseName)) {
            throw new NotFoundException("The database doesn't exist in the datasource");
        }
        DB mongoDatabase = mongoClient.getDB(databaseName);
        GridFS gfsBucket = new GridFS(mongoDatabase, bucketName);
        if (gfsBucket.findOne(fileName) != null) {
            throw new ExistsException("The file already exists");
        }
        GridFSInputFile inputFile = gfsBucket.createFile(inputStream, fileName);
        inputFile.setContentType(tika.detect(fileName));
        inputFile.save();
        return inputFile.getId().toString();
    } catch (MongoException ex) {
        logger.error("An error occured while adding the file", ex);
        throw new DatasourceException("An error occured while adding the file");
    }
}

From source file:org.bananaforscale.cormac.dao.gridfs.GridFsDataServiceImpl.java

License:Apache License

/**
 * Updates a file in the database. If the file exists in the database it will be updated. If the
 * file doesn't exist it will be created.
 *
 * @param databaseName the database//from  w w w.  jav  a2s  .c  om
 * @param bucketName the bucket
 * @param fileName the file name
 * @param inputStream the binary payload
 * @return the identifier of the file
 * @throws DatasourceException
 * @throws NotFoundException
 */
@Override
public String updateByFileName(String databaseName, String bucketName, String fileName, InputStream inputStream)
        throws DatasourceException, NotFoundException {
    try {
        if (!databaseExists(databaseName)) {
            throw new NotFoundException("The database doesn't exist in the datasource");
        }
        DB mongoDatabase = mongoClient.getDB(databaseName);
        GridFS gfsBucket = new GridFS(mongoDatabase, bucketName);
        GridFSDBFile gfsFile = gfsBucket.findOne(fileName);
        if (gfsFile == null) {
            GridFSInputFile inputFile = gfsBucket.createFile(inputStream, fileName);
            inputFile.setContentType(tika.detect(fileName));
            inputFile.save();
            return inputFile.getId().toString();
        } else {
            gfsBucket.remove(gfsFile);
            GridFSInputFile inputFile = gfsBucket.createFile(inputStream, fileName);
            inputFile.setContentType(tika.detect(fileName));
            inputFile.save();
            return inputFile.getId().toString();
        }
    } catch (MongoException ex) {
        logger.error("An error occured while updating the file", ex);
        throw new DatasourceException("An error occured while updating the file");
    }
}

From source file:org.chimi.s4s.storage.mongofs.MongoFSFileStorage.java

License:Apache License

@Override
public FileId save(File file) throws SaveFailureStorageException {
    try {/*w  w w.  j  a  v  a2 s  .  c o  m*/
        DB storageDb = mongo.getDB(db);
        GridFS gridFS = new GridFS(storageDb);
        GridFSInputFile gridFile = gridFS.createFile(file);
        gridFile.save();
        return new FileId(gridFile.getId().toString());
    } catch (IOException e) {
        throw new SaveFailureStorageException(e);
    }
}

From source file:org.craftercms.social.services.impl.SupportDataAccessImpl.java

License:Open Source License

@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();//  w ww .  ja v  a 2  s . c  om
    return (ObjectId) gFSInputFile.getId();
}