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:UnitTest3.java

License:Open Source License

public static int testgridfs() {

    long time1;/*from   w  w w . j av a2 s .  c om*/
    long time2;
    long time3;
    long time4;

    try {

        MongoClient mongo = new MongoClient("localhost", 27017);
        DB db = mongo.getDB("JFileDB");

        // TODO JFileMetaDataTable should be in MetaDB database
        DBCollection collection = db.getCollection("JFileMetaDataTable");

        String newFileName = "com.dilmus.scabi.testdata.in.App.class";

        File jFile = new File("/home/anees/workspace/testdata/in/App.class");

        // create a JFileTable namespace
        GridFS gfsj = new GridFS(db, "JFileTable");

        // get file from local drive
        GridFSInputFile gfsFile = gfsj.createFile(jFile);

        // set a new filename for identify purpose
        gfsFile.setFilename(newFileName);
        gfsFile.setContentType("class"); // jar, zip, war
        // save the image file into mongoDB
        gfsFile.save();

        // Let's create a new JSON document with some "metadata" information
        BasicDBObject info = new BasicDBObject();
        info.put("DBHost", "localhost");
        info.put("DBPort", "27017");
        info.put("JFileName", newFileName);
        info.put("JFileID", gfsFile.getId());
        info.put("JFileMD5", gfsFile.getMD5());
        collection.insert(info, WriteConcern.ACKNOWLEDGED);

        // print the result
        DBCursor cursor = gfsj.getFileList();
        while (cursor.hasNext()) {
            System.out.println(cursor.next());
        }

        DBCursor cursor2 = collection.find();

        while (cursor2.hasNext()) {
            System.out.println(cursor2.next());
        }

        // get file by it's filename
        GridFSDBFile jForOutput = gfsj.findOne(newFileName);

        // save it into a new image file
        jForOutput.writeTo("/home/anees/workspace/testdata/out/AppOut.class");

        // remove the file from mongoDB
        // gfsj.remove(gfsj.findOne(newFileName));

        System.out.println("Done");
        mongo.close();
    } catch (UnknownHostException e) {
        e.printStackTrace();
    } catch (MongoException e) {
        e.printStackTrace();
    } catch (IOException e) {
        e.printStackTrace();
    }

    return 0;
}

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From source file:calliope.db.MongoConnection.java

License:Open Source License

/**
 * List all the documents in a Mongo collection
 * @param collName the name of the collection
 * @return a String array of document keys
 * @throws AeseException //  w w w  .  j  a  va 2 s . co  m
 */
@Override
public String[] listCollection(String collName) throws AeseException {
    if (!collName.equals(Database.CORPIX)) {
        try {
            connect();
        } catch (Exception e) {
            throw new AeseException(e);
        }
        DBCollection coll = getCollectionFromName(collName);
        BasicDBObject keys = new BasicDBObject();
        keys.put(JSONKeys.DOCID, 1);
        DBCursor cursor = coll.find(new BasicDBObject(), keys);
        System.out.println("Found " + cursor.count() + " documents");
        cursor.count();
        if (cursor.length() > 0) {
            String[] docs = new String[cursor.length()];
            Iterator<DBObject> iter = cursor.iterator();
            int i = 0;
            while (iter.hasNext())
                docs[i++] = (String) iter.next().get(JSONKeys.DOCID);
            return docs;
        } else {
            return new String[0];
        }
    } else {
        GridFS gfs = new GridFS(db, collName);
        DBCursor curs = gfs.getFileList();
        int i = 0;
        List<DBObject> list = curs.toArray();
        HashSet<String> set = new HashSet<String>();
        Iterator<DBObject> iter = list.iterator();
        while (iter.hasNext()) {
            String name = (String) iter.next().get("filename");
            set.add(name);
        }
        String[] docs = new String[set.size()];
        set.toArray(docs);
        return docs;
    }
}

---

From source file:calliope.db.MongoConnection.java

License:Open Source License

/**
 * Get an image from the database//w  ww . j  a va 2s .co m
 * @param collName the collection name
 * @param docID the docid of the corpix
 * @return the image data
 */
@Override
public byte[] getImageFromDb(String collName, String docID) {
    try {
        connect();
        GridFS gfs = new GridFS(db, collName);
        GridFSDBFile file = gfs.findOne(docID);
        if (file != null) {
            InputStream ins = file.getInputStream();
            long dataLen = file.getLength();
            // this only happens if it is > 2 GB
            if (dataLen > Integer.MAX_VALUE)
                throw new AeseException("file too big (size=" + dataLen + ")");
            byte[] data = new byte[(int) dataLen];
            int offset = 0;
            while (offset < dataLen) {
                int len = ins.available();
                offset += ins.read(data, offset, len);
            }
            return data;
        } else
            throw new FileNotFoundException(docID);
    } catch (Exception e) {
        e.printStackTrace(System.out);
        return null;
    }
}

---

From source file:calliope.db.MongoConnection.java

License:Open Source License

/**
 * Store an image in the database//from w w w . j a  v a2 s .  c  om
 * @param collName name of the image collection
 * @param docID the docid of the resource
 * @param data the image data to store
 * @throws AeseException 
 */
@Override
public void putImageToDb(String collName, String docID, byte[] data) throws AeseException {
    docIDCheck(collName, docID);
    GridFS gfs = new GridFS(db, collName);
    GridFSInputFile file = gfs.createFile(data);
    file.setFilename(docID);
    file.save();
}

---

From source file:calliope.db.MongoConnection.java

License:Open Source License

/**
 * Delete an image from the database//from   w ww . j  a v  a  2 s . co  m
 * @param collName the collection name e.g. "corpix"
 * @param docID the image's docid path
 * @throws AeseException 
 */
@Override
public void removeImageFromDb(String collName, String docID) throws AeseException {
    try {
        GridFS gfs = new GridFS(db, collName);
        GridFSDBFile file = gfs.findOne(docID);
        if (file == null)
            throw new FileNotFoundException("file " + collName + "/" + docID + " not found");
        gfs.remove(file);
    } catch (Exception e) {
        throw new AeseException(e);
    }
}

---

From source file:calliope.db.MongoConnection.java

License:Open Source License

/**
 * Test a Mongo connection by putting, deleting, getting a JSON 
 * file and an image./*from   w w  w  .j  a va2s .c om*/
 * @return a String indicating how many tests succeeded
 */
@Override
public String test() {
    StringBuilder sb = new StringBuilder();
    try {
        byte[] imageData = Base64.decodeBase64(testImage);
        connect();
        String response = putToDb("test", "data/text", testJson);
        if (checkResponse(response)) {
            response = getFromDb("test", "data/text");
            if (!checkResponse(response))
                sb.append("failed put/get test for plain json\n");
            else {
                response = removeFromDb("test", "data/text");
                if (!checkResponse(response))
                    sb.append("failed to remove plain json\n");
            }
        }
        putImageToDb("corpix", "data/image", imageData);
        byte[] data = getImageFromDb("corpix", "data/image");
        if (data == null || data.length != imageData.length)
            sb.append("failed put/get test for image\n");
        else
            removeImageFromDb("corpix", "data/image");
        DBObject query = new BasicDBObject(JSONKeys.DOCID, "data/image");
        GridFS gfs = new GridFS(db, "corpix");
        GridFSDBFile file = gfs.findOne(query);
        if (file != null)
            sb.append("removed failed for image\n");
    } catch (Exception e) {
        e.printStackTrace(System.out);
    }
    return sb.toString();
}

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From source file:cn.vlabs.clb.server.storage.mongo.MongoStorageService.java

License:Apache License

protected GridFSDBFile readFile(String storageKey, String tableName) {
    DB db = options.getCollection(TABLE_TEMP_KEY).getDB();
    DBObject query = new BasicDBObject();
    query.put(FIELD_STORAGE_KEY, new ObjectId(storageKey));
    GridFSDBFile gfsFile = new GridFS(db, tableName).findOne(query);
    return gfsFile;
}

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From source file:cn.vlabs.clb.server.storage.mongo.MongoStorageService.java

License:Apache License

protected GridFSDBFile readFile(int appid, int docid, String vid, String tableName) {
    DB db = options.getCollection(TABLE_TEMP_KEY).getDB();
    db.requestStart();/*  w  ww .java2 s  . c  om*/
    DBObject query = new BasicDBObject();
    query.put(FIELD_DOC_ID, docid);
    query.put(FILED_VERSION_ID, vid);
    query.put(FIELD_APP_ID, appid);
    GridFSDBFile gfsFile = new GridFS(db, tableName).findOne(query);
    db.requestEnsureConnection();
    db.requestDone();
    return gfsFile;
}

---

From source file:cn.vlabs.clb.server.storage.mongo.MongoStorageService.java

License:Apache License

protected GridFSDBFile readTrivialFile(String spaceName, String fileName, String tableName) {
    DB db = options.getCollection(TABLE_TEMP_KEY).getDB();
    DBObject query = new BasicDBObject();
    query.put(FIELD_SPACE_NAME, new ObjectId(spaceName));
    query.put(FIELD_FILE_NAME, fileName);
    GridFSDBFile gfsFile = new GridFS(db, tableName).findOne(query);
    return gfsFile;
}

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From source file:cn.vlabs.clb.server.storage.mongo.MongoStorageService.java

License:Apache License

protected void writeFile(InputStream ins, MFile mf, String tableName) {
    DB db = options.getCollection(TABLE_TEMP_KEY).getDB();
    db.requestStart();//from ww  w  .  ja va 2s. c o m
    GridFSInputFile gfsInput;
    gfsInput = new GridFS(db, tableName).createFile(ins);
    DBCollection col = db.getCollection(tableName + ".files");
    col.setWriteConcern(WriteConcern.SAFE);
    gfsInput.setFilename(mf.getFilename());
    gfsInput.put(FIELD_STORAGE_KEY, mf.getStorageKey());
    gfsInput.put(FIELD_DOC_ID, mf.getDocid());
    gfsInput.put(FILED_VERSION_ID, mf.getVid());
    gfsInput.put(FIELD_APP_ID, mf.getAppid());
    gfsInput.put(FILED_IS_PUB, getIsPubStatus(mf.getIsPub()));
    gfsInput.setContentType(mf.getContentType());
    gfsInput.save();
    db.requestDone();
}

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