Example usage for com.mongodb.client.gridfs GridFSDownloadStream getGridFSFile

Introduction

In this page you can find the example usage for com.mongodb.client.gridfs GridFSDownloadStream getGridFSFile.

Prototype

public abstract GridFSFile getGridFSFile();

Source Link

Document

Gets the corresponding GridFSFile for the file being downloaded

Usage

From source file:UnitTest3.java

License:Open Source License

public static void testgridfs3() throws FileNotFoundException, IOException {

    long time1;//  w w w  .j a  v  a 2  s  .  co  m
    long time2;
    long time3;
    long time4;
    int n = 0;
    // "/home/anees/workspace/testdata/in/App3.class"
    String fileName = "makezip4.rar";

    MongoClient mongo = new MongoClient("localhost", 27017);
    //DB db = mongo.getDB("JFileDB");
    MongoDatabase db = mongo.getDatabase("JFileDB");
    GridFSBucket gridFSBucket = GridFSBuckets.create(db);

    // Get the input stream
    time1 = System.currentTimeMillis();
    InputStream streamToUploadFrom = new FileInputStream("/home/anees/workspace/testdata/in/" + fileName);

    // Create some custom options
    GridFSUploadOptions options = new GridFSUploadOptions().chunkSizeBytes(1024 * 1024)
            .metadata(new Document("type", "class"));

    byte data[] = new byte[64 * 1024 * 1024];
    GridFSUploadStream uploadStream = gridFSBucket.openUploadStream(fileName, options);

    while ((n = streamToUploadFrom.read(data)) > 0) {
        uploadStream.write(data, 0, n);
    }
    uploadStream.close();
    time2 = System.currentTimeMillis();

    time3 = System.currentTimeMillis();
    Date date = new Date();
    FileOutputStream streamToDownloadTo = new FileOutputStream(
            "/home/anees/workspace/testdata/out/" + fileName + "_" + date.toString());
    GridFSDownloadByNameOptions downloadOptions = new GridFSDownloadByNameOptions().revision(-1);

    GridFSDownloadStream downloadStream = gridFSBucket.openDownloadStreamByName(fileName, downloadOptions);
    long fileLength = downloadStream.getGridFSFile().getLength();
    byte[] bytesToWriteTo = new byte[64 * 1024 * 1024];

    while ((n = downloadStream.read(bytesToWriteTo)) > 0) {
        streamToDownloadTo.write(bytesToWriteTo, 0, n);
    }
    downloadStream.close();
    time4 = System.currentTimeMillis();

    System.out.println("The fileId of the uploaded file is: " + uploadStream.getFileId().toHexString());
    System.out.println("Upload time taken : time2 - time1 : " + (time2 - time1));
    System.out.println("Download time taken : time4 - time3 : " + (time4 - time3));

    streamToDownloadTo.close();
    streamToUploadFrom.close();
    mongo.close();
}

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From source file:UnitTest3.java

License:Open Source License

public static void testgridfs4() throws FileNotFoundException, IOException {

    MongoClient mongo = new MongoClient("localhost", 27017);
    //DB db = mongo.getDB("JFileDB");
    MongoDatabase db = mongo.getDatabase("JFileDB");
    GridFSBucket gridFSBucket = GridFSBuckets.create(db);

    // Get the input stream
    InputStream streamToUploadFrom = new ByteArrayInputStream("Hello World".getBytes(StandardCharsets.UTF_8));

    // Create some custom options
    GridFSUploadOptions options = new GridFSUploadOptions().chunkSizeBytes(1024)
            .metadata(new Document("type", "file"));

    ObjectId fileId = gridFSBucket.uploadFromStream("test", streamToUploadFrom, options);
    streamToUploadFrom.close();/*from w  w  w . j a va 2  s.  c  om*/
    System.out.println("The fileId of the uploaded file is: " + fileId.toHexString());

    // Get some data to write
    byte[] data = "some data to upload into GridFS".getBytes(StandardCharsets.UTF_8);

    GridFSUploadStream uploadStream = gridFSBucket.openUploadStream("sample_data");
    uploadStream.write(data);
    uploadStream.close();
    System.out.println("The fileId of the uploaded file is: " + uploadStream.getFileId().toHexString());

    /*
    gridFSBucket.find().forEach(new Block<GridFSFile>() {
            
    public void apply(final GridFSFile gridFSFile) {
        System.out.println(gridFSFile.getFilename());
    }
    });
    */

    /*
    gridFSBucket.find(eq("metadata.contentType", "image/png")).forEach(
        new Block<GridFSFile>() {
                    
            public void apply(final GridFSFile gridFSFile) {
                System.out.println(gridFSFile.getFilename());
            }
        });
    */

    FileOutputStream streamToDownloadTo = new FileOutputStream("/tmp/test.txt");
    gridFSBucket.downloadToStream(fileId, streamToDownloadTo);
    streamToDownloadTo.close();

    streamToDownloadTo = new FileOutputStream("/tmp/test.txt");
    GridFSDownloadByNameOptions downloadOptions = new GridFSDownloadByNameOptions().revision(0);
    gridFSBucket.downloadToStreamByName("test", streamToDownloadTo, downloadOptions);
    streamToDownloadTo.close();

    GridFSDownloadStream downloadStream = gridFSBucket.openDownloadStream(fileId);
    int fileLength = (int) downloadStream.getGridFSFile().getLength();
    byte[] bytesToWriteTo = new byte[fileLength];
    downloadStream.read(bytesToWriteTo);
    downloadStream.close();

    System.out.println(new String(bytesToWriteTo, StandardCharsets.UTF_8));

    downloadStream = gridFSBucket.openDownloadStreamByName("sample_data");
    fileLength = (int) downloadStream.getGridFSFile().getLength();
    bytesToWriteTo = new byte[fileLength];
    downloadStream.read(bytesToWriteTo);
    downloadStream.close();

    System.out.println(new String(bytesToWriteTo, StandardCharsets.UTF_8));

    gridFSBucket.rename(fileId, "test2");

    gridFSBucket.delete(fileId);
    mongo.close();
}

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From source file:com.dilmus.dilshad.scabi.db.DBackFile.java

License:Open Source License

public long get(String fileName, String fullFilePath) throws IOException, DScabiException {
    long time1;/*from  w  w w  .j  ava 2 s.  c om*/
    long time2;
    int n = 0;
    long total = 0;

    time1 = System.currentTimeMillis();

    /* Reference : works using fileName and MongoDB specific .revision(-1) to get latest version of file
    GridFSDownloadByNameOptions downloadOptions = new GridFSDownloadByNameOptions().revision(-1); // latest file
    GridFSDownloadStream downloadStream = m_gridFSBucket.openDownloadStreamByName(fileName, downloadOptions);
    ObjectId fileID = downloadStream.getGridFSFile().getObjectId();
    log.debug("get() file id : " + downloadStream.getGridFSFile().getId().toString());
     */

    String fid = getLatestFileID(fileName);
    if (null == fid) {
        throw new DScabiException("get() No file found with PutStatus=Completed for file : " + fileName,
                "DBF.GET.1");
    }
    log.debug("get() fid : {}", fid);
    GridFSDownloadStream downloadStream = m_gridFSBucket.openDownloadStream(new ObjectId(fid));
    log.debug("get() file id : " + downloadStream.getGridFSFile().getId().toString());

    /* This is only if using MongoDB specific .revision(-1) to get latest version of file
    if (false == isValidMetaData(fileName, fileID)) {
       log.debug("get() latest file has invalid meta data"); 
       downloadStream.close();
    downloadOptions.revision(-2); // prior version to latest file
    try {
       downloadStream = m_gridFSBucket.openDownloadStreamByName(fileName, downloadOptions);
    }
    catch (Exception e) {
       throw new DScabiException("get() No matches with valid meta data and PutStatus=Completed, No second latest also, for file : " + fileName, "DBF.GET.2");
    }
            
    ObjectId fileID2 = downloadStream.getGridFSFile().getObjectId();
    log.debug("get() file id : " + downloadStream.getGridFSFile().getId().toString());
    if (false == isValidMetaData(fileName, fileID2)) {
       downloadStream.close();
       throw new DScabiException("get() No matches with valid meta data and PutStatus=Completed for file : " + fileName, "DBF.GET.3");
    }
    }
    */

    FileOutputStream toStream = new FileOutputStream(fullFilePath);

    //long fileLength = downloadStream.getGridFSFile().getLength();
    byte[] bytesToWriteTo = new byte[m_bufferSize];

    while ((n = downloadStream.read(bytesToWriteTo)) > 0) {
        toStream.write(bytesToWriteTo, 0, n);
        total = total + n;
    }
    downloadStream.close();
    toStream.close();

    time2 = System.currentTimeMillis();
    log.debug("get() Download time taken : time2 - time1 : " + (time2 - time1));

    return total;
}

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From source file:com.dilmus.dilshad.scabi.db.DBackFile.java

License:Open Source License

public long get(String fileName, OutputStream toStream) throws IOException, DScabiException {
    long time1;/*ww w.  j a  v  a2  s .c  o  m*/
    long time2;
    int n = 0;
    long total = 0;

    time1 = System.currentTimeMillis();

    String fid = getLatestFileID(fileName);
    if (null == fid) {
        throw new DScabiException("get() No file found with PutStatus=Completed for file : " + fileName,
                "DBF.GET2.1");
    }
    log.debug("get() fid : {}", fid);
    GridFSDownloadStream downloadStream = m_gridFSBucket.openDownloadStream(new ObjectId(fid));
    log.debug("get() file id : " + downloadStream.getGridFSFile().getId().toString());

    //long fileLength = downloadStream.getGridFSFile().getLength();
    byte[] bytesToWriteTo = new byte[m_bufferSize];

    while ((n = downloadStream.read(bytesToWriteTo)) > 0) {
        toStream.write(bytesToWriteTo, 0, n);
        total = total + n;
    }
    downloadStream.close();
    toStream.close();

    time2 = System.currentTimeMillis();
    log.debug("get() Download time taken : time2 - time1 : " + (time2 - time1));

    return total;
}

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From source file:gridfs.GridFSTour.java

License:Apache License

/**
 * Run this main method to see the output of this quick example.
 *
 * @param args takes an optional single argument for the connection string
 * @throws FileNotFoundException if the sample file cannot be found
 * @throws IOException if there was an exception closing an input stream
 *//*from   w w w.  jav  a  2s  .  c o  m*/
public static void main(final String[] args) throws FileNotFoundException, IOException {
    MongoClient mongoClient;

    if (args.length == 0) {
        // connect to the local database server
        mongoClient = new MongoClient();
    } else {
        mongoClient = new MongoClient(new MongoClientURI(args[0]));
    }

    // get handle to "mydb" database
    MongoDatabase database = mongoClient.getDatabase("mydb");
    database.drop();

    GridFSBucket gridFSBucket = GridFSBuckets.create(database);

    /*
     * UploadFromStream Example
     */
    // Get the input stream
    InputStream streamToUploadFrom = new ByteArrayInputStream("Hello World".getBytes(StandardCharsets.UTF_8));

    // Create some custom options
    GridFSUploadOptions options = new GridFSUploadOptions().chunkSizeBytes(1024)
            .metadata(new Document("type", "presentation"));

    ObjectId fileId = gridFSBucket.uploadFromStream("mongodb-tutorial", streamToUploadFrom, options);
    streamToUploadFrom.close();
    System.out.println("The fileId of the uploaded file is: " + fileId.toHexString());

    /*
     * OpenUploadStream Example
     */

    // Get some data to write
    byte[] data = "Data to upload into GridFS".getBytes(StandardCharsets.UTF_8);

    GridFSUploadStream uploadStream = gridFSBucket.openUploadStream("sampleData");
    uploadStream.write(data);
    uploadStream.close();
    System.out.println("The fileId of the uploaded file is: " + uploadStream.getFileId().toHexString());

    /*
     * Find documents
     */
    gridFSBucket.find().forEach(new Block<GridFSFile>() {
        @Override
        public void apply(final GridFSFile gridFSFile) {
            System.out.println(gridFSFile.getFilename());
        }
    });

    /*
     * Find documents with a filter
     */
    gridFSBucket.find(eq("metadata.contentType", "image/png")).forEach(new Block<GridFSFile>() {
        @Override
        public void apply(final GridFSFile gridFSFile) {
            System.out.println(gridFSFile.getFilename());
        }
    });

    /*
     * DownloadToStream
     */
    FileOutputStream streamToDownloadTo = new FileOutputStream("/tmp/mongodb-tutorial.txt");
    gridFSBucket.downloadToStream(fileId, streamToDownloadTo);
    streamToDownloadTo.close();

    /*
     * DownloadToStreamByName
     */
    streamToDownloadTo = new FileOutputStream("/tmp/mongodb-tutorial.txt");
    GridFSDownloadByNameOptions downloadOptions = new GridFSDownloadByNameOptions().revision(0);
    gridFSBucket.downloadToStreamByName("mongodb-tutorial", streamToDownloadTo, downloadOptions);
    streamToDownloadTo.close();

    /*
     * OpenDownloadStream
     */
    GridFSDownloadStream downloadStream = gridFSBucket.openDownloadStream(fileId);
    int fileLength = (int) downloadStream.getGridFSFile().getLength();
    byte[] bytesToWriteTo = new byte[fileLength];
    downloadStream.read(bytesToWriteTo);
    downloadStream.close();

    System.out.println(new String(bytesToWriteTo, StandardCharsets.UTF_8));

    /*
     * OpenDownloadStreamByName
     */

    downloadStream = gridFSBucket.openDownloadStreamByName("sampleData");
    fileLength = (int) downloadStream.getGridFSFile().getLength();
    bytesToWriteTo = new byte[fileLength];
    downloadStream.read(bytesToWriteTo);
    downloadStream.close();

    System.out.println(new String(bytesToWriteTo, StandardCharsets.UTF_8));

    /*
     * Rename
     */
    gridFSBucket.rename(fileId, "mongodbTutorial");

    /*
     * Delete
     */
    gridFSBucket.delete(fileId);

    database.drop();
}

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