Example usage for java.util.logging LogManager getClass

Introduction

In this page you can find the example usage for java.util.logging LogManager getClass.

Prototype

@HotSpotIntrinsicCandidate
public final native Class<?> getClass();

Source Link

Document

Returns the runtime class of this Object .

Usage

From source file:com.googlecode.arit.jul.HandlerResourceScanner.java

public HandlerResourceScanner() {
    LogManager logManager = LogManager.getLogManager();
    Class<? extends LogManager> clazz = logManager.getClass();
    try {//w  w w . ja  va2 s  .c o  m
        // We only enable the plugin if the getLoggerNames method has not been overridden.
        // An overridden getLoggerNames method is an indication that the log manager maintains
        // multiple logger name spaces and that we need a specialized plugin. This is the
        // case for Tomcat's ClassLoaderLogManager. Note that WebSphere's WsLogManager
        // overrides getLogger, but not getLoggerNames.
        if (clazz.getMethod("getLoggerNames").getDeclaringClass().equals(LogManager.class)) {
            this.logManager = logManager;
        } else {
            this.logManager = null;
        }
    } catch (NoSuchMethodException ex) {
        throw new NoSuchMethodError(ex.getMessage());
    }
}

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From source file:MailHandlerDemo.java

/**
 * Used debug problems with the logging.properties. The system property
 * java.security.debug=access,stack can be used to trace access to the
 * LogManager reset.//from  www.  j a  va  2s . c o m
 *
 * @param prefix a string to prefix the output.
 * @param err any PrintStream or null for System.out.
 */
@SuppressWarnings("UseOfSystemOutOrSystemErr")
private static void checkConfig(String prefix, PrintStream err) {
    if (prefix == null || prefix.trim().length() == 0) {
        prefix = "DEBUG";
    }

    if (err == null) {
        err = System.out;
    }

    try {
        err.println(prefix + ": java.version=" + System.getProperty("java.version"));
        err.println(prefix + ": LOGGER=" + LOGGER.getLevel());
        err.println(prefix + ": JVM id " + ManagementFactory.getRuntimeMXBean().getName());
        err.println(prefix + ": java.security.debug=" + System.getProperty("java.security.debug"));
        SecurityManager sm = System.getSecurityManager();
        if (sm != null) {
            err.println(prefix + ": SecurityManager.class=" + sm.getClass().getName());
            err.println(prefix + ": SecurityManager classLoader=" + toString(sm.getClass().getClassLoader()));
            err.println(prefix + ": SecurityManager.toString=" + sm);
        } else {
            err.println(prefix + ": SecurityManager.class=null");
            err.println(prefix + ": SecurityManager.toString=null");
            err.println(prefix + ": SecurityManager classLoader=null");
        }

        String policy = System.getProperty("java.security.policy");
        if (policy != null) {
            File f = new File(policy);
            err.println(prefix + ": AbsolutePath=" + f.getAbsolutePath());
            err.println(prefix + ": CanonicalPath=" + f.getCanonicalPath());
            err.println(prefix + ": length=" + f.length());
            err.println(prefix + ": canRead=" + f.canRead());
            err.println(prefix + ": lastModified=" + new java.util.Date(f.lastModified()));
        }

        LogManager manager = LogManager.getLogManager();
        String key = "java.util.logging.config.file";
        String cfg = System.getProperty(key);
        if (cfg != null) {
            err.println(prefix + ": " + cfg);
            File f = new File(cfg);
            err.println(prefix + ": AbsolutePath=" + f.getAbsolutePath());
            err.println(prefix + ": CanonicalPath=" + f.getCanonicalPath());
            err.println(prefix + ": length=" + f.length());
            err.println(prefix + ": canRead=" + f.canRead());
            err.println(prefix + ": lastModified=" + new java.util.Date(f.lastModified()));
        } else {
            err.println(prefix + ": " + key + " is not set as a system property.");
        }
        err.println(prefix + ": LogManager.class=" + manager.getClass().getName());
        err.println(prefix + ": LogManager classLoader=" + toString(manager.getClass().getClassLoader()));
        err.println(prefix + ": LogManager.toString=" + manager);
        err.println(prefix + ": MailHandler classLoader=" + toString(MailHandler.class.getClassLoader()));
        err.println(
                prefix + ": Context ClassLoader=" + toString(Thread.currentThread().getContextClassLoader()));
        err.println(prefix + ": Session ClassLoader=" + toString(Session.class.getClassLoader()));
        err.println(prefix + ": DataHandler ClassLoader=" + toString(DataHandler.class.getClassLoader()));

        final String p = MailHandler.class.getName();
        key = p.concat(".mail.to");
        String to = manager.getProperty(key);
        err.println(prefix + ": TO=" + to);
        if (to != null) {
            err.println(prefix + ": TO=" + Arrays.toString(InternetAddress.parse(to, true)));
        }

        key = p.concat(".mail.from");
        String from = manager.getProperty(key);
        if (from == null || from.length() == 0) {
            Session session = Session.getInstance(new Properties());
            InternetAddress local = InternetAddress.getLocalAddress(session);
            err.println(prefix + ": FROM=" + local);
        } else {
            err.println(prefix + ": FROM=" + Arrays.asList(InternetAddress.parse(from, false)));
            err.println(prefix + ": FROM=" + Arrays.asList(InternetAddress.parse(from, true)));
        }

        synchronized (manager) {
            final Enumeration<String> e = manager.getLoggerNames();
            while (e.hasMoreElements()) {
                final Logger l = manager.getLogger(e.nextElement());
                if (l != null) {
                    final Handler[] handlers = l.getHandlers();
                    if (handlers.length > 0) {
                        err.println(prefix + ": " + l.getClass().getName() + ", " + l.getName());
                        for (Handler h : handlers) {
                            err.println(prefix + ":\t" + toString(prefix, err, h));
                        }
                    }
                }
            }
        }
    } catch (Throwable error) {
        err.print(prefix + ": ");
        error.printStackTrace(err);
    }
    err.flush();
}

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