Examples of java.util.logging.StreamHandler

java.util.logging.StreamHandler
Stream based logging Handler.
This is primarily intended as a base class or support class to be used in implementing other logging Handlers.
LogRecords are published to a given java.io.OutputStream.
Configuration: By default each StreamHandler is initialized using the following LogManager configuration properties. If properties are not defined (or have invalid values) then the specified default values are used.
- java.util.logging.StreamHandler.level specifies the default level for the Handler (defaults to Level.INFO).
- java.util.logging.StreamHandler.filter specifies the name of a Filter class to use (defaults to no Filter).
- java.util.logging.StreamHandler.formatter specifies the name of a Formatter class to use (defaults to java.util.logging.SimpleFormatter).
- java.util.logging.StreamHandler.encoding the name of the character set encoding to use (defaults to the default platform encoding).
@version 1.19, 11/17/05 @since 1.4


  /*
   * Test setEncoding() methods with unsupported encoding.
   */
  public void testSetEncoding_Unsupported() {
    StreamHandler h = new StreamHandler();
    try {
      h.setEncoding("impossible");
      fail("Should throw UnsupportedEncodingException!");
    } catch (UnsupportedEncodingException e) {
      // expected
    }
    assertNull(h.getEncoding());
  }

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  /*
   * Test setEncoding() with insufficient privilege.
   */
  public void testSetEncoding_InsufficientPrivilege() throws Exception {
    StreamHandler h = new StreamHandler();
    SecurityManager oldMan = System.getSecurityManager();
    System.setSecurityManager(new MockSecurityManager());
    // set a normal value
    try {
      h.setEncoding("iso-8859-1");
      fail("Should throw SecurityException!");
    } catch (SecurityException e) {
      // expected
    } finally {
      System.setSecurityManager(oldMan);
    }
    assertNull(h.getEncoding());
    System.setSecurityManager(new MockSecurityManager());
    // set an invalid value
    try {


      h.setEncoding("impossible");
      fail("Should throw SecurityException!");
    } catch (SecurityException e) {
      // expected
    } finally {
      System.setSecurityManager(oldMan);
    }
    assertNull(h.getEncoding());
  }

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  /*
   * Test setEncoding() methods will flush a stream before setting.
   */
  public void testSetEncoding_FlushBeforeSetting() throws Exception {
    ByteArrayOutputStream aos = new ByteArrayOutputStream();
    StreamHandler h = new StreamHandler(aos, new MockFormatter());
    LogRecord r = new LogRecord(Level.INFO, "abcd");
    h.publish(r);
    assertFalse(aos.toString().indexOf("abcd") > 0);
    h.setEncoding("iso-8859-1");
    assertTrue(aos.toString().indexOf("abcd") > 0);
  }

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   * @param debug whether or not this is in debug mode
   */
  public void debug(boolean debug) {
    this.debug = debug;
    if (debug && debugHandler == null) {
          debugHandler = new StreamHandler(System.out, new SimpleFormatter());
          debugHandler.setLevel(Level.ALL);
    }
  }

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   *          whether or not this is in debug mode
   */
  public synchronized void debug(boolean debug) {
    this.debug = debug;
    if (debug && debugHandler == null) {
      debugHandler = new StreamHandler(System.out, new SimpleFormatter());
      debugHandler.setLevel(Level.ALL);
    }
  }

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   *          whether or not this is in debug mode
   */
  public synchronized void debug(boolean debug) {
    this.debug = debug;
    if (debug && debugHandler == null) {
      debugHandler = new StreamHandler(System.out, new SimpleFormatter());
      debugHandler.setLevel(Level.ALL);
    }
  }

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    Logger.getLogger("").addHandler(fileHandler);


    PrintStream stdout = System.out;
    PrintStream stderr = System.err;


    Handler ConsoleHandle = new StreamHandler(stdout, new ClientLoggerFormatter());
    Logger.getLogger("").addHandler(ConsoleHandle);


    Handler ErrHandle = new StreamHandler(stderr, new ClientLoggerFormatter());
    Logger.getLogger("").addHandler(ErrHandle);


    Logger logger;
    SystemListenerStream los;

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            // very odd, but lets tell the user and continue
            System.err.println(String.format(
                "Could not create log '%s' due to error '%s'",
                LOG_FILE_PATTERN, ioe.getLocalizedMessage()));
            System.err.println("Will send logs to standard.err instead.");
            handler = new StreamHandler(System.err, new UpgradeFormatter());
        }
        return handler;
    }

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   *          whether or not this is in debug mode
   */
  public synchronized void debug(boolean debug) {
    this.debug = debug;
    if (debug && debugHandler == null) {
      debugHandler = new StreamHandler(System.out, new SimpleFormatter());
      debugHandler.setLevel(Level.ALL);
    }
  }

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   *          whether or not this is in debug mode
   */
  public void debug(boolean debug) {
    this.debug = debug;
    if (debug && debugHandler == null) {
      debugHandler = new StreamHandler(System.out, new SimpleFormatter());
      debugHandler.setLevel(Level.ALL);
    }
  }

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