Example usage for java.io FileWriter write

List of usage examples for java.io FileWriter write

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Introduction

In this page you can find the example usage for java.io FileWriter write.

Prototype

public void write(int c) throws IOException

Source Link

Document

Writes a single character.

Usage

From source file:com.linkedin.pinot.perf.ForwardIndexReaderBenchmark.java

public static void multiValuedReadBenchMarkV1(File file, int numDocs, int totalNumValues, int maxEntriesPerDoc,
        int columnSizeInBits) throws Exception {
    System.out.println("******************************************************************");
    System.out.println("Analyzing " + file.getName() + " numDocs:" + numDocs + ", totalNumValues:"
            + totalNumValues + ", maxEntriesPerDoc:" + maxEntriesPerDoc + ", numBits:" + columnSizeInBits);
    long start, end;
    boolean readFile = true;
    boolean randomRead = true;
    boolean contextualRead = true;
    boolean signed = false;
    boolean isMmap = false;
    PinotDataBuffer heapBuffer = PinotDataBuffer.fromFile(file, ReadMode.mmap, FileChannel.MapMode.READ_ONLY,
            "benchmarking");
    BaseSingleColumnMultiValueReader reader = new com.linkedin.pinot.core.io.reader.impl.v1.FixedBitMultiValueReader(
            heapBuffer, numDocs, totalNumValues, columnSizeInBits, signed);

    int[] intArray = new int[maxEntriesPerDoc];
    File outfile = new File("/tmp/" + file.getName() + ".raw");
    FileWriter fw = new FileWriter(outfile);
    for (int i = 0; i < numDocs; i++) {
        int length = reader.getIntArray(i, intArray);
        StringBuilder sb = new StringBuilder();
        String delim = "";
        for (int j = 0; j < length; j++) {
            sb.append(delim);//from w ww. j a va2 s  .  co m
            sb.append(intArray[j]);
            delim = ",";
        }
        fw.write(sb.toString());
        fw.write("\n");
    }
    fw.close();

    // sequential read
    if (readFile) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        RandomAccessFile raf = new RandomAccessFile(file, "rw");
        ByteBuffer buffer = ByteBuffer.allocateDirect((int) file.length());
        raf.getChannel().read(buffer);
        for (int run = 0; run < MAX_RUNS; run++) {
            long length = file.length();
            start = System.currentTimeMillis();
            for (int i = 0; i < length; i++) {
                byte b = buffer.get(i);
            }
            end = System.currentTimeMillis();
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value read bytes stats for " + file.getName());
        System.out.println(
                stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));

        raf.close();
    }
    if (randomRead) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        for (int run = 0; run < MAX_RUNS; run++) {
            start = System.currentTimeMillis();
            for (int i = 0; i < numDocs; i++) {
                int length = reader.getIntArray(i, intArray);
            }
            end = System.currentTimeMillis();
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value sequential read one stats for " + file.getName());
        System.out.println(
                stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));
    }

    if (contextualRead) {
        DescriptiveStatistics stats = new DescriptiveStatistics();
        for (int run = 0; run < MAX_RUNS; run++) {
            MultiValueReaderContext context = (MultiValueReaderContext) reader.createContext();
            start = System.currentTimeMillis();
            for (int i = 0; i < numDocs; i++) {
                int length = reader.getIntArray(i, intArray, context);
            }
            end = System.currentTimeMillis();
            // System.out.println("RUN:" + run + "Time:" + (end-start));
            stats.addValue((end - start));
        }
        System.out.println("v1 multi value sequential read one with context stats for " + file.getName());
        System.out.println(
                stats.toString().replaceAll("\n", ", ") + " raw:" + Arrays.toString(stats.getValues()));

    }
    reader.close();
    heapBuffer.close();
    System.out.println("******************************************************************");

}

From source file:AIR.ResourceBundler.Console.ResourcesBuilder.java

private static void writeFileHeader(FileWriter sw, String filePath) throws IOException {
    File scriptInfo = new File(filePath);

    // get file crc
    String crcResult = "";

    FileInputStream fs = new FileInputStream(filePath);
    byte[] bb = new byte[4];
    int i = fs.hashCode();
    for (int k = 3, j = 0; k >= 0; k--, j += 8) {
        bb[k] = (byte) (i >> j);
    }/*w w w .  ja  va 2  s .c o  m*/

    for (byte b : bb)
        crcResult += String.format("%2X", b).toLowerCase();

    // write out script info
    String resourceFile = Path.getFileName(filePath);
    sw.write(String.format("/* SOURCE FILE: %s (%s) %s */\n", resourceFile, crcResult,
            scriptInfo.lastModified()));
    sw.write("\n");
}

From source file:doc.doclets.WorkbenchHelpDoclet.java

private static void _writeAttrDoc(final String className, final String documentation) throws IOException {
    String fileBaseName = className + "_attributes.html";

    String fileName = null;//from  ww  w .  jav a2s.  c om
    if (_outputDirectory != null) {
        fileName = _outputDirectory + File.separator + "html" + File.separator + fileBaseName;
    } else {
        fileName = fileBaseName;
    }
    // If necessary, create the directory.
    final File directoryFile = new File(fileName).getParentFile();
    if (!directoryFile.exists()) {
        if (!directoryFile.mkdirs()) {
            throw new IOException("Directory \"" + directoryFile + "\" does not exist and cannot be created.");
        }
    }
    System.out.println("Creating " + fileName);

    final FileWriter writer = new FileWriter(fileName);
    try {
        writer.write(documentation);
    } finally {
        writer.close();
    }
}

From source file:doc.doclets.WorkbenchHelpDoclet.java

private static void _writeIndex(final String indexText) throws IOException {
    String fileBaseName = "index.xml";

    String fileName = null;/*from   w w w.ja v a2 s .com*/
    if (_outputDirectory != null) {
        fileName = _outputDirectory + File.separator + fileBaseName;
    } else {
        fileName = fileBaseName;
    }
    // If necessary, create the directory.
    final File directoryFile = new File(fileName).getParentFile();
    if (!directoryFile.exists()) {
        if (!directoryFile.mkdirs()) {
            throw new IOException("Directory \"" + directoryFile + "\" does not exist and cannot be created.");
        }
    }
    System.out.println("Creating " + fileName);

    final FileWriter writer = new FileWriter(fileName);
    try {
        writer.write(indexText);
    } finally {
        writer.close();
    }
}

From source file:doc.doclets.WorkbenchHelpDoclet.java

private static void _writeTOC(final String indexText) throws IOException {
    String fileBaseName = "passerelle.xml";

    String fileName = null;/*w  ww.  j av  a  2  s . c o m*/
    if (_outputDirectory != null) {
        fileName = _outputDirectory + File.separator + fileBaseName;
    } else {
        fileName = fileBaseName;
    }
    // If necessary, create the directory.
    final File directoryFile = new File(fileName).getParentFile();
    if (!directoryFile.exists()) {
        if (!directoryFile.mkdirs()) {
            throw new IOException("Directory \"" + directoryFile + "\" does not exist and cannot be created.");
        }
    }
    System.out.println("Creating " + fileName);

    final FileWriter writer = new FileWriter(fileName);
    try {
        writer.write(indexText);
    } finally {
        writer.close();
    }
}

From source file:doc.doclets.WorkbenchHelpDoclet.java

private static void _writeHtmlTOC(final String indexText) throws IOException {
    String fileBaseName = "passerelle.html";

    String fileName = null;/*from ww  w . ja  v a  2s .co  m*/
    if (_outputDirectory != null) {
        fileName = _outputDirectory + File.separator + "html" + File.separator + fileBaseName;
    } else {
        fileName = fileBaseName;
    }
    // If necessary, create the directory.
    final File directoryFile = new File(fileName).getParentFile();
    if (!directoryFile.exists()) {
        if (!directoryFile.mkdirs()) {
            throw new IOException("Directory \"" + directoryFile + "\" does not exist and cannot be created.");
        }
    }
    System.out.println("Creating " + fileName);

    final FileWriter writer = new FileWriter(fileName);
    try {
        writer.write(indexText);
    } finally {
        writer.close();
    }
}

From source file:doc.doclets.WorkbenchHelpDoclet.java

/**
 * Write the output to a file.//from   w w  w  . j  av a2  s  . c  om
 * 
 * @param className The dot separated fully qualified classname, which is used to specify the directory and filename to which the documentation is written.
 * @param documentation The documentation that is written.
 * @exception IOException If there is a problem writing the documentation.
 */
private static void _writeDoc(final String className, final String documentation) throws IOException {
    String fileBaseName = className + ".html";

    String fileName = null;
    if (_outputDirectory != null) {
        fileName = _outputDirectory + File.separator + "html" + File.separator + fileBaseName;
    } else {
        fileName = fileBaseName;
    }
    // If necessary, create the directory.
    final File directoryFile = new File(fileName).getParentFile();
    if (!directoryFile.exists()) {
        if (!directoryFile.mkdirs()) {
            throw new IOException("Directory \"" + directoryFile + "\" does not exist and cannot be created.");
        }
    }
    System.out.println("Creating " + fileName);

    final FileWriter writer = new FileWriter(fileName);
    try {
        writer.write(documentation);
    } finally {
        writer.close();
    }
}

From source file:egovframework.rte.fdl.filehandling.EgovFileUtil.java

/**
 * <p>/*from ww  w  .  j av  a  2s  .com*/
 * ? ? ? .
 * </p>
 * @param file
 *        <code>File</code>
 * @param text
 *        <code>String</code>
 */
public static void writeFile(File file, String text) {
    FileWriter writer = null;

    try {
        writer = new FileWriter(file);
        writer.write(text);
    } catch (Exception e) {
        log.error("Error creating File: " + file.getName() + ":" + e);
        return;
    } finally {
        try {
            writer.close();
        } catch (Exception e) {

        }
    }
}

From source file:org.apache.hadoop.gateway.SecureClusterTest.java

private static File setupJaasConf(File baseDir, String keyTabFile, String principal) throws IOException {
    File file = new File(baseDir, "jaas.conf");
    if (!file.exists()) {
        file.createNewFile();/*  ww  w. j ava  2  s.com*/
    } else {
        file.delete();
        file.createNewFile();
    }
    FileWriter writer = new FileWriter(file);
    String content = String.format("com.sun.security.jgss.initiate {\n"
            + "com.sun.security.auth.module.Krb5LoginModule required\n" + "renewTGT=true\n"
            + "doNotPrompt=true\n" + "useKeyTab=true\n" + "keyTab=\"%s\"\n" + "principal=\"%s\"\n"
            + "isInitiator=true\n" + "storeKey=true\n" + "useTicketCache=true\n" + "client=true;\n" + "};\n",
            keyTabFile, principal);
    writer.write(content);
    writer.close();
    return file;
}

From source file:de.julielab.jtbd.TokenizerApplication.java

/**
 * writes an ArrayList of Strings to a file
 *
 * @param lines//from   w w  w. java  2s .  c om
 *            the ArrayList
 * @param outFile
 */
static void writeFile(final ArrayList<String> lines, final File outFile) {
    try {
        final FileWriter fw = new FileWriter(outFile);

        for (int i = 0; i < lines.size(); i++)
            fw.write(lines.get(i) + "\n");
        fw.close();
    } catch (final Exception e) {
        System.err.println("ERR: error writing file: " + outFile.toString());
        e.printStackTrace();
        System.exit(-1);
    }

}