org.apache.log4j.helpers.Loader类的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中org.apache.log4j.helpers.Loader类的一些代码示例，展示了Loader类的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Loader类的具体详情如下：
包路径：org.apache.log4j.helpers.Loader
类名称：Loader

Loader介绍

[英]Load resources (or images) from various sources.
[中]从各种来源加载资源（或图像）。

代码示例

代码示例来源：origin: log4j/log4j

/**
 *  Get a resource by delegating to getResource(String).
 *  @param resource resource name
 *  @param clazz class, ignored.
 *  @return URL to resource or null.
 *  @deprecated as of 1.2.
 */
public static URL getResource(String resource, Class clazz) {
  return getResource(resource);
}

代码示例来源：origin: log4j/log4j

String className = subst(layout_element.getAttribute(CLASS_ATTR));
LogLog.debug("Parsing layout of class: \""+className+"\"");		 
try {
 Object instance     = Loader.loadClass(className).newInstance();
 Layout layout       = (Layout)instance;
 PropertySetter propSetter = new PropertySetter(layout);
 NodeList params     = layout_element.getChildNodes();
 final int length 	= params.getLength();
Node currentNode = (Node)params.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
 Element currentElement = (Element) currentNode;
 String tagName = currentElement.getTagName();
 if(tagName.equals(PARAM_TAG)) {
    setParameter(currentElement, propSetter);
 } else {
   parseUnrecognizedElement(instance, currentElement, props);
 propSetter.activate();
 return layout;
    Thread.currentThread().interrupt();
 LogLog.error("Could not create the Layout. Reported error follows.",
    oops);
 return null;

代码示例来源：origin: log4j/log4j

classLoader = getTCL();
  if(classLoader != null) {
   LogLog.debug("Trying to find ["+resource+"] using context classloader "
      +classLoader+".");
   url = classLoader.getResource(resource);      
  LogLog.debug("Trying to find ["+resource+"] using "+classLoader
       +" class loader.");
  url = classLoader.getResource(resource);
  LogLog.warn(TSTR, t);
} catch(InvocationTargetException t) {
  if (t.getTargetException() instanceof InterruptedException

代码示例来源：origin: log4j/log4j

String className = subst(appenderElement.getAttribute(CLASS_ATTR));
LogLog.debug("Class name: [" + className+']');    
try {
 Object instance     = Loader.loadClass(className).newInstance();
 Appender appender    = (Appender)instance;
 PropertySetter propSetter = new PropertySetter(appender);
 appender.setName(subst(appenderElement.getAttribute(NAME_ATTR)));
 NodeList children    = appenderElement.getChildNodes();
 final int length 	= children.getLength();
Node currentNode = children.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
 Element currentElement = (Element)currentNode;
 if (currentElement.getTagName().equals(PARAM_TAG)) {
    setParameter(currentElement, propSetter);
 propSetter.activate();
 return appender;

代码示例来源：origin: org.ops4j.pax.logging/pax-logging-service

String className = subst(layout_element.getAttribute(CLASS_ATTR));
LogLog.debug("Parsing layout of class: \""+className+"\"");		 
try {
 Object instance     = Loader.loadClass(className).newInstance();
 Layout layout       = (Layout)instance;
 PropertySetter propSetter = new PropertySetter(layout);
 NodeList params     = layout_element.getChildNodes();
 final int length 	= params.getLength();
Node currentNode = (Node)params.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
 Element currentElement = (Element) currentNode;
 String tagName = currentElement.getTagName();
 if(tagName.equals(PARAM_TAG)) {
    setParameter(currentElement, propSetter);
 propSetter.activate();
 return layout;
 LogLog.error("Could not create the Layout. Reported error follows.",
    oops);
 return null;

代码示例来源：origin: log4j/log4j

String priStr = subst(element.getAttribute(VALUE_ATTR));
LogLog.debug("Level value for "+catName+" is  ["+priStr+"].");
LogLog.error("Root level cannot be inherited. Ignoring directive.");
 } else {
logger.setLevel(null);
 String className = subst(element.getAttribute(CLASS_ATTR));      
 if(EMPTY_STR.equals(className)) {	
logger.setLevel(OptionConverter.toLevel(priStr, Level.DEBUG));
 } else {
LogLog.debug("Desired Level sub-class: ["+className+']');
try {	 
 Class clazz = Loader.loadClass(className);
 Method toLevelMethod = clazz.getMethod("toLevel", 
            ONE_STRING_PARAM);

代码示例来源：origin: log4j/log4j

void parseCategory (Element loggerElement) {
 String catName = subst(loggerElement.getAttribute(NAME_ATTR));
 String className = subst(loggerElement.getAttribute(CLASS_ATTR));
  LogLog.debug("Retreiving an instance of org.apache.log4j.Logger.");
  cat = (catFactory == null) ? repository.getLogger(catName) : repository.getLogger(catName, catFactory);
  LogLog.debug("Desired logger sub-class: ["+className+']');
   try {	 
  Class clazz = Loader.loadClass(className);
  Method getInstanceMethod = clazz.getMethod("getLogger", 
             ONE_STRING_PARAM);
      Thread.currentThread().interrupt();
    LogLog.error("Could not retrieve category ["+catName+
      "]. Reported error follows.", oops);
    return;
  boolean additivity = OptionConverter.toBoolean(
             subst(loggerElement.getAttribute(ADDITIVITY_ATTR)),
       true);

代码示例来源：origin: log4j/log4j

/**
  Add a renderer to a hierarchy passed as parameter.
*/
static
public
void addRenderer(RendererSupport repository, String renderedClassName,
     String renderingClassName) {
 LogLog.debug("Rendering class: ["+renderingClassName+"], Rendered class: ["+
    renderedClassName+"].");
 ObjectRenderer renderer = (ObjectRenderer)
      OptionConverter.instantiateByClassName(renderingClassName,
             ObjectRenderer.class,
             null);
 if(renderer == null) {
  LogLog.error("Could not instantiate renderer ["+renderingClassName+"].");
  return;
 } else {
  try {
 Class renderedClass = Loader.loadClass(renderedClassName);
 repository.setRenderer(renderedClass, renderer);
  } catch(ClassNotFoundException e) {
 LogLog.error("Could not find class ["+renderedClassName+"].", e);
  }
 }
}

代码示例来源：origin: mrsarm/log4jwebtracker

String file = getInitParameter("log4jConfigLocation");
if (file==null) {
  URL url = Loader.getResource("log4j.properties");
  if(new File(url.getFile()).exists()) {
    PropertyConfigurator.configure(url);
  } else {
    url = Loader.getResource("log4j.xml");
    if(new File(url.getFile()).exists()) {
      DOMConfigurator.configure(url);
    } else {
      System.err.println("*** Log4j configuration file not found. ***");
  if(new File(path).exists()) {
    if(path.indexOf(".xml")!=-1) {
      DOMConfigurator.configure(path);
    } else if(path.indexOf(".properties")!=-1) {
      PropertyConfigurator.configure(path);

代码示例来源：origin: log4j/log4j

LogLog.error("Unrecognized format specifier [" + converterId + "]");
if (converterObj instanceof String) {
 try {
  converterClass = Loader.loadClass((String) converterObj);
 } catch (ClassNotFoundException ex) {
   LogLog.warn(
    "Class for conversion pattern %" + converterName + " not found",
    ex);
  LogLog.warn(
   "Bad map entry for conversion pattern %" +  converterName + ".");

代码示例来源：origin: log4j/log4j

LogLog.debug("toLevel" + ":class=[" + clazz + "]"
   + ":pri=[" + levelName + "]");
 Class customLevel = Loader.loadClass(clazz);
 LogLog.warn("custom level class [" + clazz + "] not found.");
} catch(NoSuchMethodException e) {
 LogLog.warn("custom level class [" + clazz + "]"
  + " does not have a class function toLevel(String, Level)", e);
} catch(java.lang.reflect.InvocationTargetException e) {

代码示例来源：origin: log4j/log4j

private
void readLevel(ObjectInputStream ois)
          throws java.io.IOException, ClassNotFoundException {
 int p = ois.readInt();
 try {
  String className = (String) ois.readObject();
  if(className == null) {
 level = Level.toLevel(p);
  } else {
 Method m = (Method) methodCache.get(className);
 if(m == null) {
  Class clazz = Loader.loadClass(className);
  // Note that we use Class.getDeclaredMethod instead of
  // Class.getMethod. This assumes that the Level subclass
  // implements the toLevel(int) method which is a
  // requirement. Actually, it does not make sense for Level
  // subclasses NOT to implement this method. Also note that
  // only Level can be subclassed and not Priority.
  m = clazz.getDeclaredMethod(TO_LEVEL, TO_LEVEL_PARAMS);
  methodCache.put(className, m);
 }
 PARAM_ARRAY[0] = new Integer(p);
 level = (Level) m.invoke(null,  PARAM_ARRAY);
  }
 } catch(Exception e) {
 LogLog.warn("Level deserialization failed, reverting to default.", e);
 level = Level.toLevel(p);
 }
}

代码示例来源：origin: log4j/log4j

if(className != null) {
 try {
Class classObj = Loader.loadClass(className);
if(!superClass.isAssignableFrom(classObj)) {
 LogLog.error("A \""+className+"\" object is not assignable to a \""+
      superClass.getName() + "\" variable.");
 LogLog.error("The class \""+ superClass.getName()+"\" was loaded by ");
 LogLog.error("["+superClass.getClassLoader()+"] whereas object of type ");
 LogLog.error("\"" +classObj.getName()+"\" was loaded by ["
      +classObj.getClassLoader()+"].");

代码示例来源：origin: log4j/log4j

/**
  * If running under JDK 1.2 load the specified class using the
  *  <code>Thread</code> <code>contextClassLoader</code> if that
  *  fails try Class.forname. Under JDK 1.1 only Class.forName is
  *  used.
  *
  */
 static public Class loadClass (String clazz) throws ClassNotFoundException {
  // Just call Class.forName(clazz) if we are running under JDK 1.1
  // or if we are instructed to ignore the TCL.
  if(java1 || ignoreTCL) {
   return Class.forName(clazz);
  } else {
   try {
    return getTCL().loadClass(clazz);
   }
   // we reached here because tcl was null or because of a
   // security exception, or because clazz could not be loaded...
   // In any case we now try one more time
   catch(InvocationTargetException e) {
     if (e.getTargetException() instanceof InterruptedException
         || e.getTargetException() instanceof InterruptedIOException) {
       Thread.currentThread().interrupt();
     }
   } catch(Throwable t) {
   }
  }
  return Class.forName(clazz);
 }
}

代码示例来源：origin: log4j/log4j

private
MDC() {
 java1 = Loader.isJava1();
 if(!java1) {
  tlm = new ThreadLocalMap();
 }
 try {
  removeMethod = ThreadLocal.class.getMethod("remove", null);
 } catch (NoSuchMethodException e) {
  // don't do anything - java prior 1.5
 }
}

代码示例来源：origin: camunda/camunda-bpm-platform

String className = subst(appenderElement.getAttribute(CLASS_ATTR));
LogLog.debug("Class name: [" + className+']');    
try {
 Object instance     = Loader.loadClass(className).newInstance();
 Appender appender    = (Appender)instance;
 PropertySetter propSetter = new PropertySetter(appender);
 appender.setName(subst(appenderElement.getAttribute(NAME_ATTR)));
 NodeList children    = appenderElement.getChildNodes();
 final int length 	= children.getLength();
Node currentNode = children.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
 Element currentElement = (Element)currentNode;
 if (currentElement.getTagName().equals(PARAM_TAG)) {
    setParameter(currentElement, propSetter);
 propSetter.activate();
 return appender;

代码示例来源：origin: ops4j/org.ops4j.pax.logging

String className = subst(layout_element.getAttribute(CLASS_ATTR));
LogLog.debug("Parsing layout of class: \""+className+"\"");		 
try {
 Object instance     = Loader.loadClass(className).newInstance();
 Layout layout       = (Layout)instance;
 PropertySetter propSetter = new PropertySetter(layout);
 NodeList params     = layout_element.getChildNodes();
 final int length 	= params.getLength();
Node currentNode = (Node)params.item(loop);
if (currentNode.getNodeType() == Node.ELEMENT_NODE) {
 Element currentElement = (Element) currentNode;
 String tagName = currentElement.getTagName();
 if(tagName.equals(PARAM_TAG)) {
    setParameter(currentElement, propSetter);
 propSetter.activate();
 return layout;
 LogLog.error("Could not create the Layout. Reported error follows.",
    oops);
 return null;

代码示例来源：origin: apache/log4j

String priStr = subst(element.getAttribute(VALUE_ATTR));
LogLog.debug("Level value for "+catName+" is  ["+priStr+"].");
LogLog.error("Root level cannot be inherited. Ignoring directive.");
 } else {
logger.setLevel(null);
 String className = subst(element.getAttribute(CLASS_ATTR));      
 if(EMPTY_STR.equals(className)) {	
logger.setLevel(OptionConverter.toLevel(priStr, Level.DEBUG));
 } else {
LogLog.debug("Desired Level sub-class: ["+className+']');
try {	 
 Class clazz = Loader.loadClass(className);
 Method toLevelMethod = clazz.getMethod("toLevel", 
            ONE_STRING_PARAM);

代码示例来源：origin: camunda/camunda-bpm-platform

void parseCategory (Element loggerElement) {
 String catName = subst(loggerElement.getAttribute(NAME_ATTR));
 String className = subst(loggerElement.getAttribute(CLASS_ATTR));
  LogLog.debug("Retreiving an instance of org.apache.log4j.Logger.");
  cat = repository.getLogger(catName);
  LogLog.debug("Desired logger sub-class: ["+className+']');
   try {	 
  Class clazz = Loader.loadClass(className);
  Method getInstanceMethod = clazz.getMethod("getLogger", 
             ONE_STRING_PARAM);
  cat = (Logger) getInstanceMethod.invoke(null, new Object[] {catName});
   } catch (Exception oops) {
  LogLog.error("Could not retrieve category ["+catName+
      "]. Reported error follows.", oops);
  return;
  boolean additivity = OptionConverter.toBoolean(
             subst(loggerElement.getAttribute(ADDITIVITY_ATTR)),
       true);

代码示例来源：origin: camunda/camunda-bpm-platform

/**
  Add a renderer to a hierarchy passed as parameter.
*/
static
public
void addRenderer(RendererSupport repository, String renderedClassName,
     String renderingClassName) {
 LogLog.debug("Rendering class: ["+renderingClassName+"], Rendered class: ["+
    renderedClassName+"].");
 ObjectRenderer renderer = (ObjectRenderer)
      OptionConverter.instantiateByClassName(renderingClassName,
             ObjectRenderer.class,
             null);
 if(renderer == null) {
  LogLog.error("Could not instantiate renderer ["+renderingClassName+"].");
  return;
 } else {
  try {
 Class renderedClass = Loader.loadClass(renderedClassName);
 repository.setRenderer(renderedClass, renderer);
  } catch(ClassNotFoundException e) {
 LogLog.error("Could not find class ["+renderedClassName+"].", e);
  }
 }
}

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