Example usage for com.mongodb.util Util toHex

Introduction

In this page you can find the example usage for com.mongodb.util Util toHex.

Prototype

public static String toHex(final byte[] bytes) 

Source Link

Document

Converts the given byte buffer to a hexadecimal string using java.lang.Integer#toHexString(int) .

Usage

From source file:cc.acs.mongofs.gridfs.CLI.java

License:Apache License

public static void main(String[] args) throws Exception {

    if (args.length < 1) {
        printUsage();//from  w w  w  .j av  a 2  s . co m
        return;
    }

    Mongo m = null;

    for (int i = 0; i < args.length; i++) {
        String s = args[i];

        if (s.equals("--db")) {
            db = args[i + 1];
            i++;
            continue;
        }

        if (s.equals("--host")) {
            host = args[i + 1];
            i++;
            continue;
        }

        if (s.equals("help")) {
            printUsage();
            return;
        }

        if (s.equals("list")) {
            GridFS fs = getGridFS();

            System.out.printf("%-60s %-10s\n", "Filename", "Length");

            for (DBObject o : fs.getFileList()) {
                System.out.printf("%-60s %-10d\n", o.get("filename"), ((Number) o.get("length")).longValue());
            }
            return;
        }

        if (s.equals("get")) {
            GridFS fs = getGridFS();
            String fn = args[i + 1];
            GridFSDBFile f = fs.findOne(fn);
            if (f == null) {
                System.err.println("can't find file: " + fn);
                return;
            }

            f.writeTo(f.getFilename());
            return;
        }

        if (s.equals("put")) {
            GridFS fs = getGridFS();
            String fn = args[i + 1];
            GridFSInputFile f = fs.createFile(new File(fn));
            f.save();
            f.validate();
            return;
        }

        if (s.equals("md5")) {
            GridFS fs = getGridFS();
            String fn = args[i + 1];
            GridFSDBFile f = fs.findOne(fn);
            if (f == null) {
                System.err.println("can't find file: " + fn);
                return;
            }

            MessageDigest md5 = MessageDigest.getInstance("MD5");
            md5.reset();
            DigestInputStream is = new DigestInputStream(f.getInputStream(), md5);
            int read = 0;
            while (is.read() >= 0) {
                read++;
                int r = is.read(new byte[17]);
                if (r < 0)
                    break;
                read += r;
            }
            byte[] digest = md5.digest();
            System.out.println("length: " + read + " md5: " + Util.toHex(digest));
            return;
        }

        System.err.println("unknown option: " + s);
        return;
    }

}

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From source file:cc.acs.mongofs.gridfs.GridFSInputFile.java

License:Apache License

public int saveChunks(int chunkSize) throws IOException {
    if (_saved)/* w w  w .  ja va2 s  . co m*/
        throw new RuntimeException("already saved!");

    if (chunkSize > 3.5 * 1000 * 1000)
        throw new RuntimeException("chunkSize must be less than 3.5MiB!");

    byte[] b = new byte[chunkSize];

    long total = 0;
    int cn = 0;

    MessageDigest md = _md5Pool.get();
    md.reset();
    DigestInputStream in = new DigestInputStream(_in, md);

    while (true) {
        int start = 0;

        while (start < b.length) {
            int r = in.read(b, start, b.length - start);
            if (r == 0)
                throw new RuntimeException("i'm doing something wrong");
            if (r < 0)
                break;
            start += r;
        }

        total += start;

        byte[] mine = b;

        if (start != b.length) {
            mine = new byte[start];
            System.arraycopy(b, 0, mine, 0, start);
        }

        DBObject chunk = BasicDBObjectBuilder.start().add("files_id", _id).add("n", cn++).add("data", mine)
                .get();

        _fs._chunkCollection.save(chunk);

        if (start < b.length)
            break;
    }

    _md5 = Util.toHex(md.digest());
    _md5Pool.done(md);

    _length = total;
    _saved = true;
    return cn;
}

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