Examples of java.util.logging.LogRecord

java.util.logging.LogRecord
LogRecord objects are used to pass logging requests between the logging framework and individual log Handlers.
When a LogRecord is passed into the logging framework it logically belongs to the framework and should no longer be used or updated by the client application.
Note that if the client application has not specified an explicit source method name and source class name, then the LogRecord class will infer them automatically when they are first accessed (due to a call on getSourceMethodName or getSourceClassName) by analyzing the call stack. Therefore, if a logging Handler wants to pass off a LogRecord to another thread, or to transmit it over RMI, and if it wishes to subsequently obtain method name or class name information it should call one of getSourceClassName or getSourceMethodName to force the values to be filled in.
Serialization notes:
- The LogRecord class is serializable.
- Because objects in the parameters array may not be serializable, during serialization all objects in the parameters array are written as the corresponding Strings (using Object.toString).
- The ResourceBundle is not transmitted as part of the serialized form, but the resource bundle name is, and the recipient object's readObject method will attempt to locate a suitable resource bundle.
@version 1.24, 11/17/05 @since 1.4

        if (writer != null) {
            writer.println(message);
            // Flushing the writer to make sure the message is written
            writer.flush();
        } else if (logger.isLoggable(Level.INFO)) {
            LogRecord lr = new LogRecord(Level.INFO, message);
            lr.setSourceClassName(logger.getName());
            lr.setSourceMethodName(null);
            lr.setLoggerName(logger.getName());
            logger.log(lr);
        }
    }

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    private static void doLog(Logger l1, Logger l2) {
        l1.severe("severe message");
        l1.warning("warning message");
        l1.info("info message");
        LogRecord r = new LogRecord(Level.FINE, "fine message");
        if ("Resource4".equals(l1.getName())) {
            r.setLoggerName(l1.getName());
        }
        r.setThrown(new IllegalArgumentException("tadaam"));
        l1.log(r);
        r = new LogRecord(Level.FINER, "finer message with {0} and {1}");
        r.setParameters(new Object[] {
            "param1", "param2"
        });
        r.setLoggerName("faky-logger");
        l1.log(r);
        l1.finest("finest message");


        // for LOG2 only 'warning' and above messages should be logged
        l2.severe("severe message");

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            doLog(logger, level, msg, null);
        }        
    }


    private static void doLog(Logger log, Level level, String msg, Throwable t) {
        LogRecord record = new LogRecord(level, msg);
    
        record.setLoggerName(log.getName());
        record.setResourceBundleName(log.getResourceBundleName());
        record.setResourceBundle(log.getResourceBundle());
            
        if (t != null) {
            record.setThrown(t);
        }
        
        //try to get the right class name/method name - just trace
        //back the stack till we get out of this class
        StackTraceElement stack[] = (new Throwable()).getStackTrace();
        String cname = LogUtils.class.getName();
        for (int x = 0; x < stack.length; x++) {
            StackTraceElement frame = stack[x];
            if (!frame.getClassName().equals(cname)) {
                record.setSourceClassName(frame.getClassName());
                record.setSourceMethodName(frame.getMethodName());
                break;
            }
        }
        log.log(record);
    }

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            doLog(logger, level, msg, null);
        }        
    }


    private static void doLog(Logger log, Level level, String msg, Throwable t) {
        LogRecord record = new LogRecord(level, msg);
    
        record.setLoggerName(log.getName());
        record.setResourceBundleName(log.getResourceBundleName());
        record.setResourceBundle(log.getResourceBundle());
            
        if (t != null) {
            record.setThrown(t);
        }
        
        //try to get the right class name/method name - just trace
        //back the stack till we get out of this class
        StackTraceElement stack[] = (new Throwable()).getStackTrace();
        String cname = LogUtils.class.getName();
        for (int x = 0; x < stack.length; x++) {
            StackTraceElement frame = stack[x];
            if (!frame.getClassName().equals(cname)) {
                record.setSourceClassName(frame.getClassName());
                record.setSourceMethodName(frame.getMethodName());
                break;
            }
        }
        log.log(record);
    }

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    public Logger getLogger() {
      return _logger;
    }
    
    protected LogRecord createLogRecord(Level level, String msg) {
        LogRecord lr = new LogRecord(level, msg);
        return lr;
    }

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    public Logger getLogger() {
      return _logger;
    }
    
    protected LogRecord createLogRecord(Level level, String msg) {
        LogRecord lr = new LogRecord(level, msg);
        return lr;
    }

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    // Default implementation using a JDK logger
    protected abstract LogRecord createLogRecord(Level level, String msg);
    
    protected void log(Throwable t, Level level, String msg, Object[] objs) {
        LogRecord lr = createLogRecord(level, msg);
        if(t != null)  {
            lr.setThrown(t);
        }
        if(objs != null)  {
          //serializeCheck(objs);
            lr.setParameters(objs);
        }
        getLogger().log(lr);
    }

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            lr.setParameters(objs);
        }
        getLogger().log(lr);
    }
    protected void logp(Object clazz, String methodName, Throwable t, Level level, String msg, Object[] objs) {
        LogRecord lr = createLogRecord(level, msg);
        if(t != null)  {
            lr.setThrown(t);
        }
        if( clazz!=null ) {
          lr.setSourceClassName(toClassName(clazz));
        }
        if( methodName!=null ) {
          lr.setSourceMethodName(methodName);
        }
        if(objs != null)  {
          //serializeCheck(objs);
            lr.setParameters(objs);
        }
        getLogger().log(lr);
    }

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public class setLevel
  implements Testlet
{
  public void test(TestHarness h)
  {
    LogRecord rec = new LogRecord(Level.INFO, "msg");


    // Check #1.
    h.check(rec.getLevel() == Level.INFO);


    // Check #2.
    rec.setLevel(Level.WARNING);
    h.check(rec.getLevel() == Level.WARNING);
  }

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public class setThreadID
  implements Testlet
{
  public void test(TestHarness th)
  {
    LogRecord rec = new LogRecord(Level.CONFIG, "foo");


    // Check #1.
    rec.setThreadID(1234);
    th.check(rec.getThreadID(), 1234);


    // Check #2.
    rec.setThreadID(-4321);
    th.check(rec.getThreadID(), -4321);
  }

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