Example usage for com.mongodb.gridfs GridFSDBFile writeTo

Introduction

In this page you can find the example usage for com.mongodb.gridfs GridFSDBFile writeTo.

Prototype

public long writeTo(final OutputStream out) throws IOException

Source Link

Document

Writes the file's data to an OutputStream.

Usage

From source file:rapture.blob.mongodb.GridFSBlobHandler.java

License:Open Source License

protected GridFSInputFile updateExisting(CallingContext context, String docPath, InputStream newContent,
        GridFS gridFS, GridFSDBFile existing) throws IOException {
    GridFSInputFile file;//from   w ww  .  jav a  2s.co  m
    String lockKey = createLockKey(gridFS, docPath);
    LockHandle lockHandle = grabLock(context, lockKey);
    try {
        File tempFile = File.createTempFile("rapture", "blob");
        existing.writeTo(tempFile);
        FileInputStream tempIn = FileUtils.openInputStream(tempFile);
        SequenceInputStream sequence = new SequenceInputStream(tempIn, newContent);
        try {
            gridFS.remove(docPath);
            file = createNewFile(docPath, sequence);
            if (!tempFile.delete()) {
                log.warn(String.format("Unable to delete temp file created while appending docPath %s, at %s",
                        docPath, tempFile.getAbsolutePath()));
            }
        } finally {
            try {
                sequence.close();
            } catch (IOException e) {
                log.error(
                        String.format("Error closing sequence input stream: %s", ExceptionToString.format(e)));
            }
            try {
                tempIn.close();
            } catch (IOException e) {
                log.error(
                        String.format("Error closing sequence input stream: %s", ExceptionToString.format(e)));
            }
        }
    } finally {
        releaseLock(context, lockKey, lockHandle);
    }
    return file;
}

From source file:rmi_video.VideoServer.java

@Override
public VideoData getVideo(String id) throws RemoteException {
    try {// w w  w .  j  a v a 2  s. c  o m
        //Cria conexao com MongoDB
        MongoClient mongoClient = new MongoClient("localhost", 27017);
        DB db = mongoClient.getDB("VideoDatabase");

        //Recupera o video atraves do ID
        GridFS gfsVideo = new GridFS(db, "video");
        BasicDBObject whereQuery = new BasicDBObject();
        whereQuery.put("videoId", id);
        GridFSDBFile videoForOutput = gfsVideo.findOne(whereQuery);

        String filename = videoForOutput.getFilename();

        try (FileOutputStream fos = new FileOutputStream("/Users/philcr/Documents/" + filename)) {
            videoForOutput.writeTo(fos);
        }

        Path path = Paths.get("/Users/philcr/Documents/" + filename);
        byte[] data = Files.readAllBytes(path);

        File videoFile = new File("/Users/philcr/Documents/" + filename);

        //Exclui o arquivo local
        boolean deletedFlag = videoFile.delete();
        if (!deletedFlag) {
            System.err.println("Video could not be deleted!");
        }

        mongoClient.close();
        return new VideoData(data, filename, id);
    } catch (UnknownHostException ex) {
        Logger.getLogger(VideoServer.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    } catch (FileNotFoundException ex) {
        Logger.getLogger(VideoServer.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    } catch (IOException ex) {
        Logger.getLogger(VideoServer.class.getName()).log(Level.SEVERE, null, ex);
        return null;
    }
}