Example usage for com.mongodb.gridfs GridFS GridFS

Introduction

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

Prototype

public GridFS(final DB db, final String bucket) 

Source Link

Document

Creates a GridFS instance for the specified bucket in the given database.

Usage

From source file:eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.java

License:EUPL

/**
 * Lists all the versions of the specified file.
 * @param namespace - (optional) name space to be searched for files. When nothing specified, the default bucket is used
 * @param filename - filename to be searched for in the database
 * @param sortCriteria - objects in the collection are sorted with this criteria
 * @param start - starting index/*from  w w w  .  jav  a2  s.  c om*/
 * @param size - maximum number of objects returned
 * @param count - (optional) is updated with the number of objects in the database
 * @return a view of the versions stored of the specified file that contains the specified range.
 */
public List<GridFSDBFile> listFileVersions(final @Nullable String namespace, final String filename,
        final DBObject sortCriteria, final int start, final int size, final @Nullable MutableLong count) {
    checkArgument(isNotBlank(filename), "Uninitialized or invalid filename");
    final List<GridFSDBFile> list = newArrayList();
    final DB db = client().getDB(CONFIG_MANAGER.getDbName());
    final GridFS gfsNs = isNotBlank(namespace) ? new GridFS(db, namespace.trim()) : new GridFS(db);
    final DBCursor cursor = gfsNs.getFileList(new BasicDBObject("filename", filename.trim()), sortCriteria);
    cursor.skip(start).limit(size);
    try {
        while (cursor.hasNext()) {
            list.add((GridFSDBFile) cursor.next());
        }
    } finally {
        cursor.close();
    }
    if (count != null) {
        count.setValue(cursor.count());
    }
    return list;
}

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From source file:eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.java

License:EUPL

/**
 * Removes a file (with all its versions) from the specified name space.
 * @param namespace - (optional) name space where the file was stored under. When nothing specified, the default bucket is used
 * @param filename - filename to be removed from the database
 *//*from  w  w  w . j av a 2 s .c  o  m*/
public void removeFile(final @Nullable String namespace, final String filename) {
    checkArgument(isNotBlank(filename), "Uninitialized or invalid filename");
    final DB db = client().getDB(CONFIG_MANAGER.getDbName());
    final GridFS gfsNs = isNotBlank(namespace) ? new GridFS(db, namespace.trim()) : new GridFS(db);
    gfsNs.remove(filename);
}

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From source file:eu.eubrazilcc.lvl.storage.mongodb.MongoDBConnector.java

License:EUPL

/**
 * Deletes the latest version from the database. When a previous version exists for the file in the specified namespace, the latest
 * uploaded version will be the new latest version.
 * @param namespace - (optional) name space where the file was stored under. When nothing specified, the default bucket is used
 * @param filename - filename to be removed from the database
 */// w w  w. j av a 2  s  .c om
public void undoLatestVersion(final @Nullable String namespace, final String filename) {
    checkArgument(isNotBlank(filename), "Uninitialized or invalid filename");
    final String filename2 = filename.trim();
    final DB db = client().getDB(CONFIG_MANAGER.getDbName());
    final GridFS gfsNs = isNotBlank(namespace) ? new GridFS(db, namespace.trim()) : new GridFS(db);
    try {
        // remove latest version from the database            
        gfsNs.remove(new BasicDBObject(FILE_VERSION_PROP, filename2));
    } finally {
        // enforce versioning property by always restoring the latest version in the database
        restoreLatestVersion(gfsNs, filename2);
    }
}

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From source file:fr.wseduc.gridfs.GridFSPersistor.java

License:Apache License

private void writeTo(Message<JsonObject> message) {
    String path = message.body().getString("path");
    if (path == null) {
        sendError(message, "Invalid output path.");
        return;//w w w.j av a  2s  .com
    }
    JsonObject query = message.body().getObject("query");
    if (query == null) {
        sendError(message, "Invalid query.");
        return;
    }
    JsonObject alias = message.body().getObject("alias", new JsonObject());
    boolean renameIfExists = message.body().getBoolean("rename-if-exists", true);
    GridFS fs = new GridFS(db, bucket);
    try {
        List<GridFSDBFile> files = fs.find(jsonToDBObject(query));
        FileSystem fileSystem = vertx.fileSystem();
        for (GridFSDBFile f : files) {
            String a = alias.getString(f.getId().toString());
            String p = path + File.separator + ((a != null) ? a : f.getFilename());
            if (renameIfExists && fileSystem.existsSync(p)) {
                p = path + File.separator + f.getId().toString() + "_" + ((a != null) ? a : f.getFilename());
            }
            f.writeTo(p);
        }
        sendOK(message, new JsonObject().putNumber("number", files.size()));
    } catch (IOException | MongoException e) {
        logger.error(e.getMessage(), e);
        sendError(message, e.getMessage());
    }
}

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From source file:fr.wseduc.gridfs.GridFSPersistor.java

License:Apache License

private void getFile(Message<Buffer> message, JsonObject json) {
    JsonObject query = json.getObject("query");
    if (query == null) {
        return;//from w w  w . ja  va 2s  .  co  m
    }
    GridFS fs = new GridFS(db, bucket);
    try {
        GridFSDBFile f = fs.findOne(jsonToDBObject(query));
        if (f == null) {
            replyError(message, "File not found with query : " + query.encode());
            return;
        }
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        f.writeTo(os);
        message.reply(new Buffer(os.toByteArray()));
    } catch (IOException | MongoException e) {
        container.logger().error(e.getMessage(), e);
        JsonObject j = new JsonObject().putString("status", "error").putString("message", e.getMessage());
        try {
            message.reply(new Buffer(j.encode().getBytes("UTF-8")));
        } catch (UnsupportedEncodingException e1) {
            container.logger().error(e1.getMessage(), e1);
        }
    }
}

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From source file:fr.wseduc.gridfs.GridFSPersistor.java

License:Apache License

private void persistFile(Message<Buffer> message, byte[] data, JsonObject header) {
    GridFS fs = new GridFS(db, bucket);
    GridFSInputFile f = fs.createFile(data);
    String id = header.getString("_id");
    if (id == null || id.trim().isEmpty()) {
        id = UUID.randomUUID().toString();
    }/*from   w w w.j a  va 2 s.c om*/
    f.setId(id);
    f.setContentType(header.getString("content-type"));
    f.setFilename(header.getString("filename"));
    f.save();
    JsonObject reply = new JsonObject();
    reply.putString("_id", id);
    replyOK(message, reply);
}

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From source file:fr.wseduc.gridfs.GridFSPersistor.java

License:Apache License

private void copyFile(Message<Buffer> message, JsonObject json) {
    JsonObject query = json.getObject("query");
    if (query == null) {
        return;// w  ww . j  a v a 2  s  .c o  m
    }
    GridFS fs = new GridFS(db, bucket);
    try {
        GridFSDBFile f = fs.findOne(jsonToDBObject(query));
        if (f == null) {
            replyError(message, "File not found with query : " + query.encode());
            return;
        }
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        f.writeTo(os);
        JsonObject j = new JsonObject();
        j.putString("content-type", f.getContentType());
        j.putString("filename", f.getFilename());
        persistFile(message, os.toByteArray(), j);
    } catch (IOException | MongoException e) {
        replyError(message, e.getMessage());
    }
}

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From source file:fr.wseduc.gridfs.GridFSPersistor.java

License:Apache License

private void removeFile(Message<Buffer> message, JsonObject json) {
    JsonObject query = json.getObject("query");
    if (query == null) {
        return;/* w w  w.  ja  va  2 s.co  m*/
    }
    GridFS fs = new GridFS(db, bucket);
    try {
        fs.remove(jsonToDBObject(query));
        replyOK(message, null);
    } catch (MongoException e) {
        replyError(message, e.getMessage());
    }
}

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From source file:fr.wseduc.resizer.GridFsFileAccess.java

License:Apache License

@Override
public void read(String src, Handler<ImageFile> handler) {
    String[] path = parsePath(src);
    if (path == null || path.length != 2) {
        handler.handle(null);//from w  ww  . ja va2s .co m
        return;
    }
    GridFS fs = new GridFS(db, path[0]);
    GridFSDBFile f = fs.findOne(pathToDbObject(path[1]));
    if (f != null) {
        handler.handle(new ImageFile(f.getInputStream(), f.getFilename(), f.getContentType()));
    } else {
        handler.handle(null);
    }
}

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From source file:fr.wseduc.resizer.GridFsFileAccess.java

License:Apache License

@Override
public void write(String dest, ImageFile img, Handler<String> handler) {
    String[] path = parsePath(dest);
    if (path == null || path.length < 1) {
        handler.handle(null);//www  .  j ava 2  s  .  c om
        return;
    }
    String id;
    if (path.length == 2 && path[1] != null && !path[1].trim().isEmpty()) {
        id = path[1];
    } else {
        id = UUID.randomUUID().toString();
    }
    GridFS fs = new GridFS(db, path[0]);
    try {
        saveFile(img, id, fs);
    } catch (DuplicateKeyException e) {
        fs.remove(new BasicDBObject("_id", id));
        saveFile(img, id, fs);
    }
    handler.handle(id);
}

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