psiprobe.tools.logging.jdk.Jdk14ManagerAccessor.java Source code

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Here is the source code for psiprobe.tools.logging.jdk.Jdk14ManagerAccessor.java

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/**
 * Licensed under the GPL License. You may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
 *
 * THIS PACKAGE IS PROVIDED "AS IS" AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE.
 */
package psiprobe.tools.logging.jdk;

import org.apache.commons.beanutils.MethodUtils;

import psiprobe.tools.logging.DefaultAccessor;
import psiprobe.tools.logging.LogDestination;

import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Enumeration;
import java.util.List;

/**
 * The Class Jdk14ManagerAccessor.
 */
public class Jdk14ManagerAccessor extends DefaultAccessor {

    /**
     * Instantiates a new jdk14 manager accessor.
     *
     * @param cl the cl
     * @throws ClassNotFoundException the class not found exception
     * @throws IllegalAccessException the illegal access exception
     * @throws IllegalArgumentException the illegal argument exception
     * @throws InvocationTargetException the invocation target exception
     */
    public Jdk14ManagerAccessor(ClassLoader cl) throws ClassNotFoundException, IllegalAccessException,
            IllegalArgumentException, InvocationTargetException {

        Class clazz = cl.loadClass("java.util.logging.LogManager");
        Method getManager = MethodUtils.getAccessibleMethod(clazz, "getLogManager", new Class[0]);
        Object manager = getManager.invoke(null);
        if (manager == null) {
            throw new NullPointerException(clazz.getName() + ".getLogManager() returned null");
        }
        setTarget(manager);
    }

    /**
     * Gets the root logger.
     *
     * @return the root logger
     */
    public Jdk14LoggerAccessor getRootLogger() {
        return getLogger("");
    }

    /**
     * Gets the logger.
     *
     * @param name the name
     * @return the logger
     */
    public Jdk14LoggerAccessor getLogger(String name) {
        try {
            Object logger = MethodUtils.invokeMethod(getTarget(), "getLogger", name);
            if (logger == null) {
                throw new NullPointerException(
                        getTarget().getClass().getName() + "#getLogger(\"" + name + "\") returned null");
            }
            Jdk14LoggerAccessor accessor = new Jdk14LoggerAccessor();
            accessor.setTarget(logger);
            accessor.setApplication(getApplication());
            return accessor;
        } catch (Exception e) {
            logger.error("{}#getLogger('{}') failed", getTarget().getClass().getName(), name, e);
        }
        return null;
    }

    /**
     * Gets the handlers.
     *
     * @return the handlers
     */
    public List<LogDestination> getHandlers() {
        List<LogDestination> allHandlers = new ArrayList<>();
        try {
            for (String name : Collections
                    .list((Enumeration<String>) MethodUtils.invokeMethod(getTarget(), "getLoggerNames", null))) {
                Jdk14LoggerAccessor accessor = getLogger(name);
                if (accessor != null) {
                    allHandlers.addAll(accessor.getHandlers());
                }
            }
        } catch (Exception e) {
            logger.error("{}#getLoggerNames() failed", getTarget().getClass().getName(), e);
        }
        return allHandlers;
    }

}