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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.container.logging;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;
import java.util.TimeZone;
import java.util.logging.Formatter;
import java.util.logging.LogRecord;
/**
* Produces compact output format for prelude logs
*
* @author Bob Travis
*/
public class LogFormatter extends Formatter {
/** date format objects */
static SimpleDateFormat ddMMMyyyy;
static DateFormat dfMMM;
static SimpleDateFormat yyyyMMdd;
static {
ddMMMyyyy = new SimpleDateFormat("[dd/MMM/yyyy:HH:mm:ss Z]", Locale.US);
ddMMMyyyy.setTimeZone(TimeZone.getTimeZone("UTC"));
dfMMM = new SimpleDateFormat("MMM", Locale.US);
dfMMM.setTimeZone(TimeZone.getTimeZone("UTC"));
yyyyMMdd = new SimpleDateFormat("[yyyy-MM-dd HH:mm:ss]", Locale.US);
yyyyMMdd.setTimeZone(TimeZone.getTimeZone("UTC"));
}
/** Whether to strip down the message to only the message or not */
private boolean messageOnly = false;
/** Controls which of the available timestamp formats is used in all log records
*/
private static final int timestampFormat = 2; // 0=millis, 1=mm/dd/yyyy, 2=yyyy-mm-dd
/**
* Standard constructor
*/
public LogFormatter() {}
/**
* Make it possible to log stripped messages
*/
public void messageOnly (boolean messageOnly) {
this.messageOnly = messageOnly;
}
public String format(LogRecord record) {
// if we don't want any other stuff we just return the message
if (messageOnly) {
return formatMessage(record);
}
String rawMsg = record.getMessage();
boolean isLogMsg =
rawMsg.charAt(0) == 'L'
&& rawMsg.charAt(1) == 'O'
&& rawMsg.charAt(2) == 'G'
&& rawMsg.charAt(3) == ':';
String nameInsert =
(!isLogMsg)
? record.getLevel().getName() + ": "
: "";
return (timeStamp(record)
+ nameInsert
+ formatMessage(record)
+ "\n"
);
}
/**
* Public support methods
*/
/**
* Static insertDate method will insert date fragments into a string
* based on '%x' pattern elements. Equivalents in SimpleDateFormatter patterns,
* with examples:
* <ul>
* <li>%Y YYYY 2003
* <li>%m MM 08
* <li>%x MMM Aug
* <li>%d dd 25
* <li>%H HH 14
* <li>%M mm 30
* <li>%S ss 35
* <li>%s SSS 123
* <li>%Z Z -0400
* </ul>
*Others:
* <ul>
* <li>%T Long.toString(time)
* <li>%% %
* </ul>
*/
public static String insertDate(String pattern, long time) {
DateFormat df = new SimpleDateFormat("yyyy.MM.dd:HH:mm:ss.SSS Z", Locale.US);
df.setTimeZone(TimeZone.getTimeZone("UTC"));
Date date = new Date(time);
String datetime = df.format(date);
StringBuilder result = new StringBuilder();
int i=0;
while (i < pattern.length()) {
int j = pattern.indexOf('%',i);
if (j == -1 || j >= pattern.length()-1) { // done
result.append(pattern.substring(i)); // copy rest of pattern and quit
break;
}
result.append(pattern.substring(i, j));
switch (pattern.charAt(j+1)) {
case 'Y':
result.append(datetime.substring(0,4)); // year
break;
case 'm':
result.append(datetime.substring(5,7)); // month
break;
case 'd':
result.append(datetime.substring(8,10)); // day of month
break;
case 'H':
result.append(datetime.substring(11,13)); // hour
break;
case 'M':
result.append(datetime.substring(14,16)); // minute
break;
case 'S':
result.append(datetime.substring(17,19)); // second
break;
case 's':
result.append(datetime.substring(20,23)); // thousanths
break;
case 'Z':
result.append(datetime.substring(24)); // time zone string
break;
case 'T':
result.append(Long.toString(time)); //time in Millis
break;
case 'x':
result.append(capitalize(dfMMM.format(date)));
break;
case '%':
result.append("%%");
break;
default:
result.append("%"); // copy pattern escape and move on
j--; // only want to bump by one position....
break;
}
i = j+2;
}
return result.toString();
}
/**
* Private methods: timeStamp(LogRecord)
*/
private String timeStamp(LogRecord record) {
Date date = new Date(record.getMillis());
String stamp;
switch (timestampFormat) {
case 0:
stamp = Long.toString(record.getMillis());
break;
case 1:
stamp = ddMMMyyyy.format(date);
break;
case 2:
default:
stamp = yyyyMMdd.format(date);
break;
}
return stamp;
}
/** Return the given string with the first letter in upper case */
private static String capitalize(String string) {
if (Character.isUpperCase(string.charAt(0))) return string;
return Character.toUpperCase(string.charAt(0)) + string.substring(1);
}
}
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