java.util.logging.LogRecord#getThrown ( )源码实例Demo

@Override
public void publish(LogRecord record) {
    if (!isLoggable(record)) {
        return;
    }
    int severity = IStatus.INFO;
    if (record.getLevel() == Level.SEVERE) {
        severity = IStatus.ERROR;
    } else if (record.getLevel() == Level.WARNING) {
        severity = IStatus.WARNING;
    }

    IStatus status = new Status(severity, record.getLoggerName(), record.getMessage(), record.getThrown());

    Platform.getLog(JavaDebuggerServerPlugin.context.getBundle()).log(status);
}
 

@Override
public synchronized void publish(LogRecord record) {
    logBuffer.append(record.getLevel().getName());
    logBuffer.append("  ");
    logBuffer.append(record.getMessage());
    logBuffer.append("\n");

    if (record.getThrown() != null) {
        PrintWriter pw = new PrintWriter(logBuffer);
        record.getThrown().printStackTrace(pw);

        pw.close();
    }

    hasData = true;
}
 

/**
 * Initializes log record capture, in addition to merely printing it.
 * This allows you to call {@link #getRecords} and/or {@link #getMessages} later.
 * @param maximum the maximum number of records to keep (any further will be discarded)
 * @return this rule, for convenience
 */
public LoggerRule capture(int maximum) {
    messages = new ArrayList<>();
    ringHandler = new RingBufferLogHandler(maximum) {
        final Formatter f = new SimpleFormatter(); // placeholder instance for what should have been a static method perhaps
        @Override
        public synchronized void publish(LogRecord record) {
            super.publish(record);
            String message = f.formatMessage(record);
            Throwable x = record.getThrown();
            synchronized (messages) {
                messages.add(message == null && x != null ? x.toString() : message);
            }
        }
    };
    ringHandler.setLevel(Level.ALL);
    for (Logger logger : loggers.keySet()) {
        logger.addHandler(ringHandler);
    }
    return this;
}
 

@Override
public String format(final LogRecord record) {
    final ZonedDateTime zdt =
            ZonedDateTime.ofInstant(Instant.ofEpochMilli(record.getMillis()), zone).withZoneSameInstant(utc);
    final String date = DateTimeFormatter.ISO_OFFSET_DATE_TIME.format(zdt);
    final String thread =
            record.getThreadID() == Thread.currentThread().getId() ? Thread.currentThread().getName()
                    : ("thread-" + record.getThreadID());
    final String base = '[' + date + "][" + thread + "][" + record.getLevel().getName() + "]["
            + record.getLoggerName() + "] " + record.getMessage() + System.lineSeparator();
    final String throwable;
    if (record.getThrown() != null) {
        final StringWriter sw = new StringWriter();
        final PrintWriter pw = new PrintWriter(sw);
        pw.println();
        record.getThrown().printStackTrace(pw);
        pw.close();
        throwable = sw.toString();
    } else {
        throwable = null;
    }
    return base + (throwable == null ? "" : throwable);
}
 

@Override
public synchronized String format( final LogRecord record ) {
	date.setTime( record.getMillis() );
	builder.setLength( 0 );
	
	dateStringBuffer.setLength( 0 );
	builder.append( DATE_FORMAT.format( date, dateStringBuffer, dfFieldPosition ) ).append( LEVEL_NAME_MAP.get( record.getLevel() ) );
	
	builder.append( record.getMessage() ).append( NEW_LINE );
	
	final Throwable thrown = record.getThrown();
	if ( thrown != null ) {
		final StringWriter sw = new StringWriter();
		try ( final PrintWriter pw = new PrintWriter( sw ) ) {
			thrown.printStackTrace( pw );
		}
		builder.append( sw.toString() );
	}
	
	return builder.toString();
}
 

@Override 
public String format(LogRecord record) { 
    StringBuilder sb = new StringBuilder(); 
    sb.append(formatMessage(record)) 
        .append(LINE_SEPARATOR); 
    if (record.getThrown() != null) { 
        try { 
            StringWriter sw = new StringWriter(); 
            PrintWriter pw = new PrintWriter(sw); 
            record.getThrown().printStackTrace(pw); 
            pw.close(); 
            sb.append(sw.toString()); 
        } catch (Exception ex) { 
            // ignore 
        } 
    } 
    return sb.toString(); 
}
 

/**
 * Check if a given log record should be published.
 *
 * @param record a LogRecord
 * @return true if the log record should be published.
 */
@Override
public boolean isLoggable(@NotNull LogRecord record) {
    if (!enabled) {
        return true;
    }
    Level level = record.getLevel();
    if (level != Level.WARNING && level != Level.SEVERE) {
        return true;
    }
    if (record.getThrown() == null) {
        return true;
    }
    if (Util.isDevMode()) {
        sendError(record.getThrown(), record.getMessage());
        return true;
    } else {
        return sendError(record.getThrown(), record.getMessage()) == null;
    }
}
 

/**
 * Formats the given log record's data into human-readable text.
 * 
 * @param record The log record whose data needs to be formatted.
 * @return The log record's data as a string.
 */
@Override
public String format(LogRecord record) {
    StringBuilder result = new StringBuilder();
    result.append(record.getSourceClassName())
        .append(' ').append(record.getSourceMethodName())
        .append("\n\t").append(record.getLevel().getName())
        .append(": ").append(record.getMessage().replaceAll("\n", "\n\t"))
        .append("\n\t").append(new Date(record.getMillis()))
        .append("\n\tThread: ").append(record.getThreadID())
        .append('\n');
    if (record.getThrown() != null) {
        StringWriter sw = new StringWriter();
        PrintWriter pw = new PrintWriter(sw);
        pw.println("\tStack trace:");
        record.getThrown().printStackTrace(pw);
        pw.println("----------------------------");
        pw.flush();
        result.append(sw);
    }

    return result.toString();
}
 

@Override
public String format(LogRecord record)
{
    StringBuilder builder = new StringBuilder();
    builder
            .append(new SimpleDateFormat("dd.MM.YYYY HH:mm:ss").format(new Date()))
            .append(": ")
            .append(record.getMessage())
            .append("\n");
    Throwable ex = record.getThrown();
    if (ex != null)
    {
        StringWriter writer = new StringWriter();
        ex.printStackTrace(new PrintWriter(writer));
        builder.append(writer);
    }
    return builder.toString();
}
 

@Override
public void publish(LogRecord record) {
    lastBundle = record.getResourceBundle();
    lastBundleName = record.getResourceBundleName();
    lastParams = record.getParameters();
    lastThrown = record.getThrown();
    lastMessage = record.getMessage();
}
 

@Override
public void publish(LogRecord record) {
	StringBuilder builder = new StringBuilder();
	DateFormat format = new SimpleDateFormat(DATE_PATTERN);
	
	//Timestamp
	builder.append("[").append(format.format(new Date())).append("]");
	//Severity
	builder.append("[").append(record.getLevel()).append("] ");
	//Message
	builder.append(record.getMessage() + "\n");
	//Stack Trace - Error debugging is important
	Throwable trace = record.getThrown();
	
	//As long as the throwable exists, append it. Sometimes it is null
	if(trace != null) {
		
		StringWriter stackTrace = new StringWriter();
		trace.printStackTrace(new PrintWriter(stackTrace));
		builder.append(stackTrace.getBuffer());
	}
	
	System.out.println(builder.toString());
	if (writeToFile) {
		fileWriter.println(builder.toString());
	}
	
}
 

@Override
public String format(LogRecord record) {
    StringBuilder sb = new StringBuilder(df.format(new Date(record.getMillis())));
    sb.append(" [");
    sb.append(record.getLevel());
    sb.append("] ");
    sb.append(formatMessage(record));
    sb.append('\n');
    if (record.getThrown() != null) {
        sb.append(Throwables.getStackTraceAsString(record.getThrown()));
    }
    return sb.toString();
}
 

public XLoggingEvent(org.apache.log4j.Logger log4jLogger,
                     LogRecord record,
                     String formattedMessage)
{
    super( "org.apache.log4j.Logger",
           log4jLogger,
           record.getMillis(),
           translateLevel(record.getLevel()),
           formattedMessage,
           record.getThrown() );

    this.origLoggerName = record.getLoggerName();
}
 

/**
 * Initializes instance of this class.
 *
 * @param logRecord
 *            LogRecord containing a <code>Throwable</code> which is an instance of
 *            {@link org.openntf.domino.exceptions.OpenNTFNotesException}
 */
public LogRecordAdditionalInfo(final LogRecord logRecord) {
	Throwable t = logRecord.getThrown();
	if (t != null && t instanceof OpenNTFNotesException) {
		exceptionDetails = ((OpenNTFNotesException) t).getExceptionDetails();
	}

	WrapperFactory wf = Factory.getWrapperFactory_unchecked();
	if (wf != null) {
		lastWrappedDocs = wf.getLastWrappedDocsInThread();
	}

}
 

/**
 * Formats the thrown property of a LogRecord. The returned string will
 * contain a throwable message with a back trace.
 *
 * @param record the record.
 * @return empty string if nothing was thrown or formatted string.
 * @throws NullPointerException if the given record is null.
 * @see #apply(java.lang.Throwable)
 * @see #formatBackTrace(java.util.logging.LogRecord)
 */
public String formatThrown(final LogRecord record) {
    String msg;
    final Throwable t = record.getThrown();
    if (t != null) {
        String site = formatBackTrace(record);
        msg = formatMessage(t) + (isNullOrSpaces(site) ? "" : ' ' + site);
    } else {
        msg = "";
    }
    return msg;
}
 

/**
 * Publishes the given LogRecord by writing its data to a file using a
 * TextFormatter.
 * 
 * @param record The {@code LogRecord} to publish.
 */
@Override
public void publish(LogRecord record) {
    if (record.getLevel().intValue() < getLevel().intValue()
        && record.getThrown() == null) {
        return;
    }

    String str = getFormatter().format(record);
    if (consoleLogging
        && record.getLevel().intValue() >= Level.WARNING.intValue()) {
        System.err.println(str);
    }

    synchronized (this.writerLock) {
        if (this.writer != null) {
            try {
                this.writer.write(str, 0, str.length());
                // Because FreeCol is still in a very early stage.
                flush();
            } catch (IOException ioe) {
                System.err.println("Failed to write log record: " + str);
                ioe.printStackTrace(System.err);
            }
        }
    }

    // Do this last, as it might shut down a debug run
    Throwable t = record.getThrown();
    if (t != null && !(t instanceof FreeColException
            && ((FreeColException)t).debugAllowed())) {
        FreeColDebugger.handleCrash();
    }
}
 

private static boolean isAfterRestartRecord(List<LogRecord> recs) {
    for (int i = recs.size() - 1; i >= 0; i--) {
        LogRecord r = recs.get(i);
        if (r.getThrown() != null) {
            return AfterRestartExceptions.isAfterRestartRecord(r);
        }
    }
    return false;
}
 

/**
 * The standard formatter uses a horrible multiline approach. A single line
 * message is far more readable (and easier to post-process). Java 7
 * supports a (completely cryptic) format string, but we cook our own
 * food here...
 */
@Override
public String format(LogRecord lr) {
    // Don't make this static...it's not thread-safe
    SimpleDateFormat df = new SimpleDateFormat(ISO_TIME);

    // Trim the class name to the last couple of names
    String className = lr.getSourceClassName();
    // Use a max of 30 characters for our className
    if (className.length() > 30) {
        className = className.substring(className.length() - 30);
    }
    
    String thrown = "";
    if (lr.getThrown() != null) {
        thrown = lr.getThrown().getClass().getName();            
    }

    StringBuilder result = new StringBuilder();
    result.append(String.format("%1$s %7$08x %4$7s %2$30s %5$s%n", 
            df.format(new Date(lr.getMillis())), 
            className, 
            lr.getLoggerName(), 
            lr.getLevel(), 
            formatMessage(lr), 
            thrown,
            lr.getThreadID()));

    // Add the stack trace if necessary
    if (lr.getThrown() != null) {
        Throwable t = lr.getThrown();
        String msg = t.getMessage();
        if (msg != null) {
            result.append(System.lineSeparator());
            result.append(msg);
        }
        
        StringWriter sw = new StringWriter();
        t.printStackTrace(new PrintWriter(sw));
        result.append(System.lineSeparator());
        result.append(sw);
    }
    
    return result.toString();
}
 

protected String format(LogRecord record)
{
  if (! isLoggable(record)) {
    return null;
  }
  
  StringBuilder sb = new StringBuilder();
  
  if (record == null) {
    sb.append("no record");
        
    if (isNullDelimited()) {
      sb.append('\0');
    }

    return sb.toString();
  }

  try {
    Formatter formatter = getFormatter();
    
    if (formatter != null) {
      String value = formatter.format(record);

      sb.append(value).append('\n');
      
      if (isNullDelimited()) {
        sb.append('\0');
      }
        
      return sb.toString();
    }
      
    String message = record.getMessage();
    Throwable thrown = record.getThrown();
      
    if (thrown == null
        && message != null
        && message.indexOf("java.lang.NullPointerException") >= 0) {
      thrown = new IllegalStateException();
      thrown.fillInStackTrace();
    }
          
    if (thrown != null) {
      if (message != null
          && ! message.equals(thrown.toString()) 
          && ! message.equals(thrown.getMessage())) {
        printMessage(sb, message, record.getParameters());
      }
        
      StringWriter writer = new StringWriter();
      PrintWriter pw = new PrintWriter(writer);
      thrown.printStackTrace(pw);
      pw.close();
      
      sb.append(writer.toString());
    }
    else {
      printMessage(sb, message, record.getParameters());
    }

    /*
    TimestampFilter timestamp = getTimestampFilter();
    if (timestamp != null) {
      sb = timestamp.format(sb);
    }
    */
      
    if (isNullDelimited()) {
      sb.append('\0');
    }
  } catch (Throwable e) {
    e.printStackTrace();
  }

  return sb.toString();
}
 

public synchronized String format(LogRecord record) {
  // if record is null, return an empty String
  if (record == null) {
    return "";
  }

  StringBuffer buffer = new StringBuffer(100);

  // create timestamp
  Date timestamp = new Date(record.getMillis());
  String timestampStr = tsFormatter.format(timestamp);
  // append timestamp to the output string
  buffer.append(timestampStr);

  // append source thread ID
  buffer.append(" - ");
  buffer.append(record.getThreadID());

  // append source class if logrb() method was used, otherwise append logger name
  buffer.append(": ");
  if (record.getSourceClassName() == null || record.getSourceClassName().equals("")) {
    buffer.append(record.getLoggerName());
  } else {
    buffer.append(record.getSourceClassName());
  }

  // append source method if logrb() was used
  if (record.getSourceMethodName() != null) {
    buffer.append('.');
    buffer.append(record.getSourceMethodName());
  }

  // append message level
  buffer.append(": ");
  buffer.append(record.getLevel().getLocalizedName());

  // append message
  buffer.append(": ");
  buffer.append(record.getMessage());

  // append exception if avaialble
  if (record.getThrown() != null) {
    buffer.append(CRLF);
    StringWriter stringWriter = new StringWriter();
    PrintWriter printWriter = new PrintWriter(stringWriter);
    record.getThrown().printStackTrace(printWriter);
    printWriter.close();
    buffer.append(stringWriter.toString());
  }

  // append new line at the end
  buffer.append(CRLF);

  // return log entry
  return buffer.toString();
}