Examples of org.apache.juli.logging.Log

org.apache.juli.logging.Log
A simple logging interface abstracting logging APIs. In order to be instantiated successfully by {@link LogFactory}, classes that implement this interface must have a constructor that takes a single String parameter representing the "name" of this Log.

The six logging levels used by Log are (in order):
1. trace (the least serious)
2. debug
3. info
4. warn
5. error
6. fatal (the most serious)
The mapping of these log levels to the concepts used by the underlying logging system is implementation dependent. The implementation should ensure, though, that this ordering behaves as expected.

Performance is often a logging concern. By examining the appropriate property, a component can avoid expensive operations (producing information to be logged).

For example,
```
 if (log.isDebugEnabled()) { ... do something expensive ... log.debug(theResult); } 
```
Configuration of the underlying logging system will generally be done external to the Logging APIs, through whatever mechanism is supported by that system.
@author Scott Sanders @author Rod Waldhoff

                }
                InputSource isrc = new InputSource(input);
                return isrc;
            }
        }
        Log log = LogFactory.getLog(MyEntityResolver.class);
        if (log.isDebugEnabled())
            log.debug("Resolve entity failed" + publicId + " " + systemId);
        log.error(Localizer.getMessage("jsp.error.parse.xml.invalidPublicId",
                publicId));
        return null;
    }

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}


class MyErrorHandler implements ErrorHandler {


    public void warning(SAXParseException ex) throws SAXException {
        Log log = LogFactory.getLog(MyErrorHandler.class);
        if (log.isDebugEnabled())
            log.debug("ParserUtils: warning ", ex);
        // We ignore warnings
    }

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                }
                InputSource isrc = new InputSource(input);
                return isrc;
            }
        }
        Log log = LogFactory.getLog(MyEntityResolver.class);
        if (log.isDebugEnabled())
            log.debug("Resolve entity failed" + publicId + " " + systemId);
        log.error(Localizer.getMessage("jsp.error.parse.xml.invalidPublicId",
                publicId));
        return null;
    }

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}


class MyErrorHandler implements ErrorHandler {


    public void warning(SAXParseException ex) throws SAXException {
        Log log = LogFactory.getLog(MyErrorHandler.class);
        if (log.isDebugEnabled())
            log.debug("ParserUtils: warning ", ex);
        // We ignore warnings
    }

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                    final String f = TomEELog.getLoggerClazz();
                    if (f != null) {
                        factory = f;
                    }


                    final Log log = delegate.get();
                    if (factory == null && log != null) {
                        return log;
                    }
                }
                switch (factory) {

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                }
                InputSource isrc = new InputSource(input);
                return isrc;
            }
        }
        Log log = LogFactory.getLog(MyEntityResolver.class);
        if (log.isDebugEnabled())
            log.debug("Resolve entity failed" + publicId + " " + systemId);
        log.error(Localizer.getMessage("jsp.error.parse.xml.invalidPublicId",
                publicId));
        return null;
    }

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}


class MyErrorHandler implements ErrorHandler {


    public void warning(SAXParseException ex) throws SAXException {
        Log log = LogFactory.getLog(MyErrorHandler.class);
        if (log.isDebugEnabled())
            log.debug("ParserUtils: warning ", ex);
        // We ignore warnings
    }

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     * class cannot be loaded, a debug level log message will be written to the
     * Container's log and null will be returned.
     */
    public static Class<?> loadClass(Context context, String className) {
        ClassLoader cl = context.getLoader().getClassLoader();
        Log log = context.getLogger();
        Class<?> clazz = null;
        try {
            clazz = cl.loadClass(className);
        } catch (ClassNotFoundException e) {
            log.debug(sm.getString("introspection.classLoadFailed"), e);
        } catch (NoClassDefFoundError e) {
            log.debug(sm.getString("introspection.classLoadFailed"), e);
        } catch (ClassFormatError e) {
            log.debug(sm.getString("introspection.classLoadFailed"), e);
        } catch (Throwable t) {
            ExceptionUtils.handleThrowable(t);
            log.debug(sm.getString("introspection.classLoadFailed"), t);
        }
        return clazz;
    }

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                }
                InputSource isrc = new InputSource(input);
                return isrc;
            }
        }
        Log log = LogFactory.getLog(MyEntityResolver.class);
        if (log.isDebugEnabled())
            log.debug("Resolve entity failed" + publicId + " " + systemId);
        log.error(Localizer.getMessage("jsp.error.parse.xml.invalidPublicId",
                publicId));
        return null;
    }

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class MyErrorHandler implements ErrorHandler {


    @Override
    public void warning(SAXParseException ex) throws SAXException {
        Log log = LogFactory.getLog(MyErrorHandler.class);
        if (log.isDebugEnabled())
            log.debug("ParserUtils: warning ", ex);
        // We ignore warnings
    }

View Full Code Here

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