Example usage for java.io DataOutputStream close

List of usage examples for java.io DataOutputStream close

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Introduction

In this page you can find the example usage for java.io DataOutputStream close.

Prototype

@Override
public void close() throws IOException

Source Link

Document

Closes this output stream and releases any system resources associated with the stream.

Usage

From source file:com.ebay.erl.mobius.core.model.Tuple.java

public static void main(String[] arg) throws Throwable {
    DataOutputStream dos = new DataOutputStream(new FileOutputStream(new File("s:/test.binary")));
    //dos.writeUTF("00_DW_LSTG_ITEM");
    dos.writeInt(5);/*from w w  w . ja  v  a2 s. c o  m*/
    dos.flush();
    dos.close();
}

From source file:hyperloglog.tools.HyperLogLogCLI.java

public static void main(String[] args) {
    Options options = new Options();
    addOptions(options);/*www .jav a2  s .  co  m*/

    CommandLineParser parser = new BasicParser();
    CommandLine cli = null;
    long n = 0;
    long seed = 123;
    EncodingType enc = EncodingType.SPARSE;
    int p = 14;
    int hb = 64;
    boolean bitPack = true;
    boolean noBias = true;
    int unique = -1;
    String filePath = null;
    BufferedReader br = null;
    String outFile = null;
    String inFile = null;
    FileOutputStream fos = null;
    DataOutputStream out = null;
    FileInputStream fis = null;
    DataInputStream in = null;
    try {
        cli = parser.parse(options, args);

        if (!(cli.hasOption('n') || cli.hasOption('f') || cli.hasOption('d'))) {
            System.out.println("Example usage: hll -n 1000 " + "<OR> hll -f /tmp/input.txt "
                    + "<OR> hll -d -i /tmp/out.hll");
            usage(options);
            return;
        }

        if (cli.hasOption('n')) {
            n = Long.parseLong(cli.getOptionValue('n'));
        }

        if (cli.hasOption('e')) {
            String value = cli.getOptionValue('e');
            if (value.equals(EncodingType.DENSE.name())) {
                enc = EncodingType.DENSE;
            }
        }

        if (cli.hasOption('p')) {
            p = Integer.parseInt(cli.getOptionValue('p'));
            if (p < 4 && p > 16) {
                System.out.println("Warning! Out-of-range value specified for p. Using to p=14.");
                p = 14;
            }
        }

        if (cli.hasOption('h')) {
            hb = Integer.parseInt(cli.getOptionValue('h'));
        }

        if (cli.hasOption('c')) {
            noBias = Boolean.parseBoolean(cli.getOptionValue('c'));
        }

        if (cli.hasOption('b')) {
            bitPack = Boolean.parseBoolean(cli.getOptionValue('b'));
        }

        if (cli.hasOption('f')) {
            filePath = cli.getOptionValue('f');
            br = new BufferedReader(new FileReader(new File(filePath)));
        }

        if (filePath != null && cli.hasOption('n')) {
            System.out.println("'-f' (input file) specified. Ignoring -n.");
        }

        if (cli.hasOption('s')) {
            if (cli.hasOption('o')) {
                outFile = cli.getOptionValue('o');
                fos = new FileOutputStream(new File(outFile));
                out = new DataOutputStream(fos);
            } else {
                System.err.println("Specify output file. Example usage: hll -s -o /tmp/out.hll");
                usage(options);
                return;
            }
        }

        if (cli.hasOption('d')) {
            if (cli.hasOption('i')) {
                inFile = cli.getOptionValue('i');
                fis = new FileInputStream(new File(inFile));
                in = new DataInputStream(fis);
            } else {
                System.err.println("Specify input file. Example usage: hll -d -i /tmp/in.hll");
                usage(options);
                return;
            }
        }

        // return after deserialization
        if (fis != null && in != null) {
            long start = System.currentTimeMillis();
            HyperLogLog deserializedHLL = HyperLogLogUtils.deserializeHLL(in);
            long end = System.currentTimeMillis();
            System.out.println(deserializedHLL.toString());
            System.out.println("Count after deserialization: " + deserializedHLL.count());
            System.out.println("Deserialization time: " + (end - start) + " ms");
            return;
        }

        // construct hll and serialize it if required
        HyperLogLog hll = HyperLogLog.builder().enableBitPacking(bitPack).enableNoBias(noBias).setEncoding(enc)
                .setNumHashBits(hb).setNumRegisterIndexBits(p).build();

        if (br != null) {
            Set<String> hashset = new HashSet<String>();
            String line;
            while ((line = br.readLine()) != null) {
                hll.addString(line);
                hashset.add(line);
            }
            n = hashset.size();
        } else {
            Random rand = new Random(seed);
            for (int i = 0; i < n; i++) {
                if (unique < 0) {
                    hll.addLong(rand.nextLong());
                } else {
                    int val = rand.nextInt(unique);
                    hll.addLong(val);
                }
            }
        }

        long estCount = hll.count();
        System.out.println("Actual count: " + n);
        System.out.println(hll.toString());
        System.out.println("Relative error: " + HyperLogLogUtils.getRelativeError(n, estCount) + "%");
        if (fos != null && out != null) {
            long start = System.currentTimeMillis();
            HyperLogLogUtils.serializeHLL(out, hll);
            long end = System.currentTimeMillis();
            System.out.println("Serialized hyperloglog to " + outFile);
            System.out.println("Serialized size: " + out.size() + " bytes");
            System.out.println("Serialization time: " + (end - start) + " ms");
            out.close();
        }
    } catch (ParseException e) {
        System.err.println("Invalid parameter.");
        usage(options);
    } catch (NumberFormatException e) {
        System.err.println("Invalid type for parameter.");
        usage(options);
    } catch (FileNotFoundException e) {
        System.err.println("Specified file not found.");
        usage(options);
    } catch (IOException e) {
        System.err.println("Exception occured while reading file.");
        usage(options);
    }
}

From source file:Main.java

public static byte[] convertIntToByteArray(int my_int) throws IOException {
    ByteArrayOutputStream bos = new ByteArrayOutputStream();
    DataOutputStream dos = new DataOutputStream(bos);
    dos.writeInt(my_int);
    dos.close();
    byte[] int_bytes = bos.toByteArray();
    bos.close();//from w  ww  . j a v  a  2s .c  o m
    return int_bytes;
}

From source file:Main.java

public static void writeFile(File file, String string) throws IOException {
    file.getParentFile().mkdirs();//from   w w w . j a  v a 2  s. c  o m
    DataOutputStream dout = new DataOutputStream(new FileOutputStream(file));
    dout.write(string.getBytes());
    dout.close();
}

From source file:com.aliyun.openservices.tablestore.hadoop.Utils.java

static String serialize(Writable w) {
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    DataOutputStream out = new DataOutputStream(os);
    try {//from  w  w  w.  j  a  v a 2 s . c  o m
        w.write(out);
        out.close();
    } catch (IOException ex) {
        // intend to ignore
    }
    byte[] buf = os.toByteArray();
    return Base64.encodeBase64String(buf);
}

From source file:Main.java

public static Process runSuCommandAsync(Context context, String command) throws IOException {
    DataOutputStream fout = new DataOutputStream(context.openFileOutput(SCRIPT_NAME, 0));
    fout.writeBytes(command);/*from  w  w w  . j a  v a  2 s  .  com*/
    fout.close();

    String[] args = new String[] { "su", "-c",
            ". " + context.getFilesDir().getAbsolutePath() + "/" + SCRIPT_NAME };
    Process proc = Runtime.getRuntime().exec(args);
    return proc;
}

From source file:com.lightboxtechnologies.spectrum.FolderCount.java

static String convertScanToString(Scan scan) throws IOException {
    final ByteArrayOutputStream out = new ByteArrayOutputStream();

    DataOutputStream dos = null;
    try {/*from   w  w  w  . ja va  2s .  c o m*/
        dos = new DataOutputStream(out);
        scan.write(dos);
        dos.close();
    } finally {
        IOUtils.closeQuietly(dos);
    }

    return Base64.encodeBytes(out.toByteArray());
}

From source file:Main.java

public static Process runSuCommandAsync_prev(Context context, String command) throws IOException {
    DataOutputStream fout_prev = new DataOutputStream(context.openFileOutput(SCRIPT_NAME_prev, 0));
    fout_prev.writeBytes(command);/*from   ww w .j a va2s .  c o  m*/
    fout_prev.close();

    String[] args_prev = new String[] { "su", "-c",
            ". " + context.getFilesDir().getAbsolutePath() + "/" + SCRIPT_NAME_prev };
    Process proc_prev = Runtime.getRuntime().exec(args_prev);
    return proc_prev;
}

From source file:Main.java

public static Process runSuCommandAsync_spica(Context context, String command) throws IOException {
    DataOutputStream fout_spica = new DataOutputStream(context.openFileOutput(SCRIPT_NAME_spica, 0));
    fout_spica.writeBytes(command);//w  w w  .j av a  2 s. co  m
    fout_spica.close();

    String[] args_spica = new String[] { "su", "-c",
            ". " + context.getFilesDir().getAbsolutePath() + "/" + SCRIPT_NAME_spica };
    Process proc_spica = Runtime.getRuntime().exec(args_spica);
    return proc_spica;
}

From source file:Main.java

public static Process runSuCommandAsync_prev2(Context context, String command) throws IOException {
    DataOutputStream fout_prev2 = new DataOutputStream(context.openFileOutput(SCRIPT_NAME_prev2, 0));
    fout_prev2.writeBytes(command);//  w w w  . j av  a2s  .c om
    fout_prev2.close();

    String[] args_prev2 = new String[] { "su", "-c",
            ". " + context.getFilesDir().getAbsolutePath() + "/" + SCRIPT_NAME_prev2 };
    Process proc_prev2 = Runtime.getRuntime().exec(args_prev2);
    return proc_prev2;
}