freemarker.log.Logger.warn()方法的使用及代码示例

x33g5p2x  于2022-01-24 转载在 其他  
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本文整理了Java中freemarker.log.Logger.warn()方法的一些代码示例，展示了Logger.warn()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。Logger.warn()方法的具体详情如下：
包路径：freemarker.log.Logger
类名称：Logger
方法名：warn

Logger.warn介绍

[英]Logs a warning message.
[中]记录一条警告消息。

代码示例

代码示例来源：origin: org.freemarker/freemarker

  1. /**
  2.  * Logs flag warning for a limited number of times. This is used to prevent
  3.  * log flooding.
  4.  */
  5. static void logFlagWarning(String message) {
  6.   if (!flagWarningsEnabled) return;
  7.   
  8.   int cnt;
  9.   synchronized (flagWarningsCntSync) {
  10.     cnt = flagWarningsCnt;
  11.     if (cnt < MAX_FLAG_WARNINGS_LOGGED) {
  12.       flagWarningsCnt++;
  13.     } else {
  14.       flagWarningsEnabled = false;
  15.       return;
  16.     }
  17.   }
  18.   message += " This will be an error in some later FreeMarker version!";
  19.   if (cnt + 1 == MAX_FLAG_WARNINGS_LOGGED) {
  20.     message += " [Will not log more regular expression flag problems until restart!]";
  21.   }
  22.   LOG.warn(message);
  23. }

代码示例来源：origin: org.freemarker/freemarker

  1. private static ClassLoader tryGetThreadContextClassLoader() {
  2.   ClassLoader tccl;
  3.   try {
  4.     tccl = Thread.currentThread().getContextClassLoader();
  5.   } catch (SecurityException e) {
  6.     // Suppress
  7.     tccl = null;
  8.     LOG.warn("Can't access Thread Context ClassLoader", e);
  9.   }
  10.   return tccl;
  11. }

代码示例来源：origin: org.freemarker/freemarker

  1. public void unreferenced() {
  2.   try {
  3.     UnicastRemoteObject.unexportObject(this, false);
  4.   } catch (NoSuchObjectException e) {
  5.     LOG.warn("Failed to unexport RMI debugger listener", e);
  6.   }
  7. }

代码示例来源：origin: org.freemarker/freemarker

  1. public void report(TemplateException te, Environment env) {
  2.   String message = "Error executing FreeMarker template part in the #attempt block";
  3.   if (!logAsWarn) {
  4.     LOG.error(message, te);
  5.   } else {
  6.     LOG.warn(message, te);
  7.   }
  8. }

代码示例来源：origin: org.freemarker/freemarker

  1. TldParserForTaglibBuilding(ObjectWrapper wrapper) {
  2.   if (wrapper instanceof BeansWrapper) {
  3.     beansWrapper = (BeansWrapper) wrapper;
  4.   } else {
  5.     beansWrapper = null;
  6.     if (LOG.isWarnEnabled()) {
  7.       LOG.warn("Custom EL functions won't be loaded because "
  8.           + (wrapper == null
  9.               ? "no ObjectWrapper was specified for the TaglibFactory "
  10.                   + "(via TaglibFactory.setObjectWrapper(...), exists since 2.3.22)"
  11.               : "the ObjectWrapper wasn't instance of " + BeansWrapper.class.getName())
  12.           + ".");
  13.     }
  14.   }
  15. }

代码示例来源：origin: org.freemarker/freemarker

  1. public static Integer getSystemProperty(final String key, final int defValue) {
  2.     try {
  3.       return (Integer) AccessController.doPrivileged(
  4.         new PrivilegedAction()
  5.         {
  6.           public Object run() {
  7.             return Integer.getInteger(key, defValue);
  8.           }
  9.         });
  10.     } catch (AccessControlException e) {
  11.       LOG.warn("Insufficient permissions to read system property " + 
  12.           StringUtil.jQuote(key) + ", using default value " + defValue);
  13.       return Integer.valueOf(defValue);
  14.     }
  15.   }
  16. }

代码示例来源：origin: org.freemarker/freemarker

  1. public void run() {
  2.   try {
  3.     ObjectOutputStream out = new ObjectOutputStream(s.getOutputStream());
  4.     ObjectInputStream in = new ObjectInputStream(s.getInputStream());
  5.     byte[] challenge = new byte[512];
  6.     R.nextBytes(challenge);
  7.     out.writeInt(220); // protocol version
  8.     out.writeObject(challenge);
  9.     MessageDigest md = MessageDigest.getInstance("SHA");
  10.     md.update(password);
  11.     md.update(challenge);
  12.     byte[] response = (byte[]) in.readObject();
  13.     if (Arrays.equals(response, md.digest())) {
  14.       out.writeObject(debuggerStub);
  15.     } else {
  16.       out.writeObject(null);
  17.     }
  18.   } catch (Exception e) {
  19.     LOG.warn("Connection to " + s.getInetAddress().getHostAddress() + " abruply broke", e);
  20.   }
  21. }

代码示例来源：origin: org.freemarker/freemarker

  1. private void endEvaluation() throws JspException {
  2.   if (needPop) {
  3.     pageContext.popWriter();
  4.     needPop = false;
  5.   }
  6.   if (tag.doEndTag() == Tag.SKIP_PAGE) {
  7.     LOG.warn("Tag.SKIP_PAGE was ignored from a " + tag.getClass().getName() + " tag.");
  8.   }
  9. }

代码示例来源：origin: org.freemarker/freemarker

  1. private static ExpressionFactory findExpressionFactoryImplementation() {
  2.   ExpressionFactory ef = tryExpressionFactoryImplementation("com.sun");
  3.   if (ef == null) {
  4.     ef = tryExpressionFactoryImplementation("org.apache");
  5.     if (ef == null) {
  6.       LOG.warn("Could not find any implementation for " + 
  7.           ExpressionFactory.class.getName());
  8.     }
  9.   }
  10.   return ef;
  11. }

代码示例来源：origin: org.freemarker/freemarker

  1. @SuppressFBWarnings(value={ "MSF_MUTABLE_SERVLET_FIELD", "DC_DOUBLECHECK" }, justification="Performance trick")
  2. private void logWarnOnObjectWrapperMismatch() {
  3.   // Deliberately uses double check locking.
  4.   if (wrapper != config.getObjectWrapper() && !objectWrapperMismatchWarnLogged && LOG.isWarnEnabled()) {
  5.     final boolean logWarn;
  6.     synchronized (this) {
  7.       logWarn = !objectWrapperMismatchWarnLogged;
  8.       if (logWarn) {
  9.         objectWrapperMismatchWarnLogged = true;
  10.       }
  11.     }
  12.     if (logWarn) {
  13.       LOG.warn(
  14.           this.getClass().getName()
  15.           + ".wrapper != config.getObjectWrapper(); possibly the result of incorrect extension of "
  16.           + FreemarkerServlet.class.getName() + ".");
  17.     }
  18.   }
  19. }

代码示例来源：origin: org.freemarker/freemarker

  1. public static String getSystemProperty(final String key, final String defValue) {
  2.   try {
  3.     return (String) AccessController.doPrivileged(
  4.       new PrivilegedAction()
  5.       {
  6.         public Object run() {
  7.           return System.getProperty(key, defValue);
  8.         }
  9.       });
  10.   } catch (AccessControlException e) {
  11.     LOG.warn("Insufficient permissions to read system property " + 
  12.         StringUtil.jQuoteNoXSS(key) + ", using default value " +
  13.         StringUtil.jQuoteNoXSS(defValue));
  14.     return defValue;
  15.   }
  16. }

代码示例来源：origin: org.freemarker/freemarker

  1. private static ExpressionFactory tryExpressionFactoryImplementation(String packagePrefix) {
  2.   String className = packagePrefix + ".el.ExpressionFactoryImpl";
  3.   try {
  4.     Class cl = ClassUtil.forName(className);
  5.     if (ExpressionFactory.class.isAssignableFrom(cl)) {
  6.       LOG.info("Using " + className + " as implementation of " + 
  7.           ExpressionFactory.class.getName());
  8.       return (ExpressionFactory) cl.newInstance();
  9.     }
  10.     LOG.warn("Class " + className + " does not implement " + 
  11.         ExpressionFactory.class.getName());
  12.   } catch (ClassNotFoundException e) {
  13.   } catch (Exception e) {
  14.     LOG.error("Failed to instantiate " + className, e);
  15.   }
  16.   return null;
  17. }

代码示例来源：origin: org.freemarker/freemarker

  1. private void addConstructorsToClassIntrospectionData(final Map<Object, Object> introspData,
  2.     Class<?> clazz) {
  3.   try {
  4.     Constructor<?>[] ctors = clazz.getConstructors();
  5.     if (ctors.length == 1) {
  6.       Constructor<?> ctor = ctors[0];
  7.       introspData.put(CONSTRUCTORS_KEY, new SimpleMethod(ctor, ctor.getParameterTypes()));
  8.     } else if (ctors.length > 1) {
  9.       OverloadedMethods overloadedCtors = new OverloadedMethods(bugfixed);
  10.       for (int i = 0; i < ctors.length; i++) {
  11.         overloadedCtors.addConstructor(ctors[i]);
  12.       }
  13.       introspData.put(CONSTRUCTORS_KEY, overloadedCtors);
  14.     }
  15.   } catch (SecurityException e) {
  16.     LOG.warn("Can't discover constructors for class " + clazz.getName(), e);
  17.   }
  18. }

代码示例来源：origin: org.freemarker/freemarker

  1. private static TemplateLoader createDefaultTemplateLoader(
  2.     Version incompatibleImprovements, TemplateLoader existingTemplateLoader) {
  3.   if (incompatibleImprovements.intValue() < _TemplateAPI.VERSION_INT_2_3_21) {
  4.     if (existingTemplateLoader instanceof LegacyDefaultFileTemplateLoader) {
  5.       return existingTemplateLoader;
  6.     }
  7.     try {
  8.       return new LegacyDefaultFileTemplateLoader();
  9.     } catch (Exception e) {
  10.       CACHE_LOG.warn("Couldn't create legacy default TemplateLoader which accesses the current directory. "
  11.           + "(Use new Configuration(Configuration.VERSION_2_3_21) or higher to avoid this.)", e);
  12.       return null;
  13.     }
  14.   } else {
  15.     return null;
  16.   }
  17. }

代码示例来源：origin: org.freemarker/freemarker

  1. public Object findTemplateSource(String name) throws IOException {
  2.   String fullPath = subdirPath + name;
  3.   if (attemptFileAccess) {
  4.     // First try to open as plain file (to bypass servlet container resource caches).
  5.     try {
  6.       String realPath = servletContext.getRealPath(fullPath);
  7.       if (realPath != null) {
  8.         File file = new File(realPath);
  9.         if (file.canRead() && file.isFile()) {
  10.           return file;
  11.         }
  12.       }
  13.     } catch (SecurityException e) {
  14.       ;// ignore
  15.     }
  16.   }
  17.   // If it fails, try to open it with servletContext.getResource.
  18.   URL url = null;
  19.   try {
  20.     url = servletContext.getResource(fullPath);
  21.   } catch (MalformedURLException e) {
  22.     LOG.warn("Could not retrieve resource " + StringUtil.jQuoteNoXSS(fullPath),
  23.         e);
  24.     return null;
  25.   }
  26.   return url == null ? null : new URLTemplateSource(url, getURLConnectionUsesCaches());
  27. }

代码示例来源：origin: org.freemarker/freemarker

  1. /**
  2.  * Creates a {@link Map} with the content as described for the return value of {@link #get(Class)}.
  3.  */
  4. private Map<Object, Object> createClassIntrospectionData(Class<?> clazz) {
  5.   final Map<Object, Object> introspData = new HashMap<Object, Object>();
  6.   if (exposeFields) {
  7.     addFieldsToClassIntrospectionData(introspData, clazz);
  8.   }
  9.   final Map<MethodSignature, List<Method>> accessibleMethods = discoverAccessibleMethods(clazz);
  10.   addGenericGetToClassIntrospectionData(introspData, accessibleMethods);
  11.   if (exposureLevel != BeansWrapper.EXPOSE_NOTHING) {
  12.     try {
  13.       addBeanInfoToClassIntrospectionData(introspData, clazz, accessibleMethods);
  14.     } catch (IntrospectionException e) {
  15.       LOG.warn("Couldn't properly perform introspection for class " + clazz, e);
  16.       introspData.clear(); // FIXME NBC: Don't drop everything here.
  17.     }
  18.   }
  19.   addConstructorsToClassIntrospectionData(introspData, clazz);
  20.   if (introspData.size() > 1) {
  21.     return introspData;
  22.   } else if (introspData.size() == 0) {
  23.     return Collections.emptyMap();
  24.   } else { // map.size() == 1
  25.     Entry<Object, Object> e = introspData.entrySet().iterator().next();
  26.     return Collections.singletonMap(e.getKey(), e.getValue());
  27.   }
  28. }

代码示例来源：origin: org.freemarker/freemarker

  1. private static void logInLogger(boolean error, String message, Throwable exception) {
  2.   boolean canUseRealLogger;
  3.   synchronized (Logger.class) {
  4.     canUseRealLogger = loggerFactory != null && !(loggerFactory instanceof _NullLoggerFactory);
  5.   }
  6.   if (canUseRealLogger) {
  7.     try {
  8.       final Logger logger = Logger.getLogger("freemarker.logger");
  9.       if (error) {
  10.         logger.error(message);
  11.       } else {
  12.         logger.warn(message);
  13.       }
  14.     } catch (Throwable e) {
  15.       canUseRealLogger = false;
  16.     }
  17.   }
  18.   if (!canUseRealLogger) {
  19.     System.err.println((error ? "ERROR" : "WARN") + " "
  20.         + LoggerFactory.class.getName() + ": " + message);
  21.     if (exception != null) {
  22.       System.err.println("\tException: " + tryToString(exception));
  23.       while (exception.getCause() != null) {
  24.         exception = exception.getCause();
  25.         System.err.println("\tCaused by: " + tryToString(exception));
  26.       }
  27.     }
  28.   }
  29. }

代码示例来源：origin: org.freemarker/freemarker

  1. private void addListener(EventListener listener) {
  2.   boolean added = false;
  3.   if (listener instanceof ServletContextAttributeListener) {
  4.     addListener(servletContextAttributeListeners, listener);
  5.     added = true;
  6.   }
  7.   if (listener instanceof ServletContextListener) {
  8.     addListener(servletContextListeners, listener);
  9.     added = true;
  10.   }
  11.   if (listener instanceof HttpSessionAttributeListener) {
  12.     addListener(httpSessionAttributeListeners, listener);
  13.     added = true;
  14.   }
  15.   if (listener instanceof HttpSessionListener) {
  16.     addListener(httpSessionListeners, listener);
  17.     added = true;
  18.   }
  19.   if (!added) {
  20.     LOG.warn(
  21.       "Listener of class " + listener.getClass().getName() +
  22.       "wasn't registered as it doesn't implement any of the " +
  23.       "recognized listener interfaces.");
  24.   }
  25. }

代码示例来源：origin: org.freemarker/freemarker

  1. private void addTldLocationsFromFileDirectory(final File dir) throws IOException, SAXException {
  2.   if (dir.isDirectory()) {
  3.     if (LOG.isDebugEnabled()) {
  4.       LOG.debug("Scanning for *.tld-s in File directory: " + StringUtil.jQuoteNoXSS(dir));
  5.     }
  6.     File[] tldFiles = dir.listFiles(new FilenameFilter() {
  8.       public boolean accept(File urlAsFile, String name) {
  9.         return isTldFileNameIgnoreCase(name);
  10.       }
  12.     });
  13.     if (tldFiles == null) {
  14.       throw new IOException("Can't list this directory for some reason: " + dir);
  15.     }
  16.     for (int i = 0; i < tldFiles.length; i++) {
  17.       final File file = tldFiles[i];
  18.       addTldLocationFromTld(new FileTldLocation(file));
  19.     }
  20.   } else {
  21.     LOG.warn("Skipped scanning for *.tld for non-existent directory: " + StringUtil.jQuoteNoXSS(dir));
  22.   }
  23. }

代码示例来源：origin: org.freemarker/freemarker

  1. } catch (IOException e) {
  2.   if (LOG.isWarnEnabled()) {
  3.     LOG.warn("Ignored classpath TLD location " + StringUtil.jQuoteNoXSS(tldResourcePath)
  4.         + " because of error", e);

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