Example usage for java.io IOException IOException

Introduction

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

Prototype

public IOException() 

Source Link

Document

Constructs an IOException with null as its error detail message.

Usage

From source file:Main.java

public static void main(String[] argv) {
    Logger logger = Logger.getLogger("com.mycompany.MyClass");
    try {/*from   w ww . j  a va2s  . c o  m*/
        throw new IOException();
    } catch (Throwable e) {
        logger.log(Level.SEVERE, "Uncaught exception", e);
    }
    Exception ex = new IllegalStateException();
    logger.throwing("Main class", "myMethod", ex);
}

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From source file:com.athena.peacock.agent.Starter.java

/**
 * <pre>//ww w .j a  va 2 s. c o m
 * 
 * </pre>
 * @param args
 */
@SuppressWarnings("resource")
public static void main(String[] args) {

    int rand = (int) (Math.random() * 100) % 50;
    System.setProperty("random.seconds", Integer.toString(rand));

    String configFile = null;

    try {
        configFile = PropertyUtil.getProperty(PeacockConstant.CONFIG_FILE_KEY);
    } catch (Exception e) {
        // nothing to do.
    } finally {
        if (StringUtils.isEmpty(configFile)) {
            configFile = "/peacock/agent/config/agent.conf";
        }
    }

    /**
     * ${peacock.agent.config.file.name} ?? load  ? ??   ? ?  ? .
     */
    String errorMsg = "\n\"" + configFile + "\" file does not exist or cannot read.\n" + "Please check \""
            + configFile + "\" file exists and can read.";

    Assert.isTrue(AgentConfigUtil.exception == null, errorMsg);
    Assert.notNull(AgentConfigUtil.getConfig(PeacockConstant.SERVER_IP), "ServerIP cannot be empty.");
    Assert.notNull(AgentConfigUtil.getConfig(PeacockConstant.SERVER_PORT), "ServerPort cannot be empty.");

    /**
     * Agent ID ??  ${peacock.agent.agent.file.name} ?   ?, 
     *  ?? ?   Agent ID ? ?? .
     */
    String agentFile = null;
    String agentId = null;

    try {
        agentFile = PropertyUtil.getProperty(PeacockConstant.AGENT_ID_FILE_KEY);
    } catch (Exception e) {
        // nothing to do.
    } finally {
        if (StringUtils.isEmpty(agentFile)) {
            agentFile = "/peacock/agent/.agent";
        }
    }

    File file = new File(agentFile);
    boolean isNew = false;

    if (file.exists()) {
        try {
            agentId = IOUtils.toString(file.toURI());

            // ? ? agent ID  agent ID? ? 36? ?   ?.
            if (StringUtils.isEmpty(agentId) || agentId.length() != 36) {
                throw new IOException();
            }
        } catch (IOException e) {
            logger.error(agentFile + " file cannot read or saved invalid agent ID.", e);

            agentId = PeacockAgentIDGenerator.generateId();
            isNew = true;
        }
    } else {
        agentId = PeacockAgentIDGenerator.generateId();
        isNew = true;
    }

    if (isNew) {
        logger.info("New Agent-ID({}) be generated.", agentId);

        try {
            file.setWritable(true);
            OutputStreamWriter output = new OutputStreamWriter(new FileOutputStream(file));
            output.write(agentId);
            file.setReadOnly();
            IOUtils.closeQuietly(output);
        } catch (UnsupportedEncodingException e) {
            logger.error("UnsupportedEncodingException has occurred : ", e);
        } catch (FileNotFoundException e) {
            logger.error("FileNotFoundException has occurred : ", e);
        } catch (IOException e) {
            logger.error("IOException has occurred : ", e);
        }
    }

    // Spring Application Context Loading
    logger.debug("Starting application context...");
    AbstractApplicationContext applicationContext = new ClassPathXmlApplicationContext(
            "classpath:spring/context-*.xml");
    applicationContext.registerShutdownHook();
}

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From source file:Main.java

public static void deleteIfExists(File file) throws IOException {
    if (file.exists() && !file.delete()) {
        throw new IOException();
    }/*  w  w  w  . j  a  va2  s  .com*/
}

---

From source file:Main.java

public static Document readXMLFile(String filename) throws IOException {

    DocumentBuilder builder;//from   ww  w .  j  ava 2 s  . c om
    DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
    try {
        builder = factory.newDocumentBuilder();
        Document document = builder.parse(filename);
        return document;
    } catch (Exception e) {
        throw new IOException();
    }
}

---

From source file:Main.java

public static String readFileToString(final Class contextClass, final String streamIdentifier)
        throws IOException {

    InputStreamReader inputStreamReader = null;
    try {//from  www  .  j  a  v a2  s.  com
        inputStreamReader = new InputStreamReader(contextClass.getResourceAsStream(streamIdentifier));
        return CharStreams.toString(inputStreamReader);
    } catch (IOException e) {
        throw new IOException();
    } finally {
        if (inputStreamReader != null) {
            inputStreamReader.close();
        }
    }
}

---

From source file:Main.java

public static final void writeFix(OutputStream out, String s, int fix) throws IOException {
    if (fix <= 0)
        return;//from w w  w  . j  av  a2s . c  om
    byte[] b = s.getBytes();
    if (b.length < fix)
        throw new IOException();
    out.write(b, 0, fix);
}

---

From source file:Main.java

public static void writeXMLFile(Node node, String filename) throws IOException {

    try {//from ww  w .  j av a2s  . co m
        // Prepare the DOM document for writing
        DOMSource source = new DOMSource(node);
        // Prepare the output file

        StreamResult result = new StreamResult(filename);

        // Write the DOM document to the file
        Transformer xformer = TransformerFactory.newInstance().newTransformer();
        xformer.transform(source, result);

    } catch (TransformerConfigurationException e) {
        throw new IOException();
    } catch (TransformerException e) {
        throw new IOException();
    }
}

---

From source file:com.uksf.mf.core.utility.ClassNames.java

/**
 * Gets class names from file on uksf server
 * @return map of class names: old, new//w w w. jav a 2  s.co  m
 */
public static LinkedHashMap<String, String> getClassNames() {
    LinkedHashMap<String, String> classNames = new LinkedHashMap<>();
    try {
        URL url = new URL("http://www.uk-sf.com/mf/CLASSES.txt");
        if (checkConnection(url)) {
            throw new IOException();
        }
        InputStream stream = url.openStream();
        List<String> lines = IOUtils.readLines(stream, "UTF-8");
        for (String line : lines) {
            String parts[] = line.split(",", -1);
            if (parts[1] == null)
                parts[1] = "";
            classNames.put(parts[0], parts[1]);
        }
    } catch (IOException e) {
        LogHandler.logSeverity(WARNING, "Cannot reach 'www.uk-sf.com', class name swap will not run");
        return null;
    }
    return classNames;
}

---

From source file:Main.java

/**
 * Read a number of bytes or throw./*  w  w w .  j  a  va  2  s .c  o  m*/
 * 
 * @param size
 *           The number of bytes read
 * @return The array of bytes read.
 * @throws IOException
 */
public static byte[] readBytes(DataInputStream stream, int size) throws IOException {
    byte[] buf = new byte[size];
    int toRead = size;
    int done = 0;
    while (toRead > 0) {
        int read = stream.read(buf, done, toRead);
        if (read == -1) {
            throw new IOException();
        }
        done += read;
        toRead -= read;
    }
    return buf;
}

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From source file:com.cprassoc.solr.auth.util.CommandLineExecutor.java

public static int execChain(ArrayList<String> cmds) {
    int exitValue = -1;
    try {//from w ww.j a v a  2  s  .com
        for (int i = 0; i < cmds.size(); i++) {
            exitValue = exec(cmds.get(i));
            if (exitValue > 0) {
                throw new IOException();
            }
        }
    } catch (Exception e) {
        e.printStackTrace();
    }

    return exitValue;
}

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