PatternFormatter (Apache Excalibur API)

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org.apache.log.format
Class PatternFormatter

java.lang.Object
  org.apache.log.format.PatternFormatter

All Implemented Interfaces:: Formatter

Direct Known Subclasses:: ExtendedPatternFormatter

public class PatternFormatter
extends java.lang.Object
implements Formatter

This formater formats the LogEvents according to a input pattern string.

The format of each pattern element can be %[+|-][#[.#]]{field:subformat}.

The +|- indicates left or right justify.
The #.# indicates the minimum and maximum size of output. You may omit the values and the field will be formatted without size restriction.
You may specify #, or #. to only define the minimum size.
You may specify .# to only define the maximum size.

field indicates which field is to be output and must be one of properties of LogEvent. The following fields are currently supported:

category	Category value of the logging event.
context	Context value of the logging event.
message	Message value of the logging event.
time	Time value of the logging event.
rtime	Relative time value of the logging event.
throwable	Throwable value of the logging event.
priority	Priority value of the logging event.
thread	Name of the thread which logged the event.

subformat indicates a particular subformat to use on the specified field, and is currently only supported by:

context	Specifies the context map parameter name.
time	Specifies the pattern to be pass to `SimpleDateFormat` to format the time.

A simple example of a typical PatternFormatter format would be:


   %{time} %5.5{priority}[%-10.10{category}]: %{message}

This would produce a line like:


   1000928827905 DEBUG [     junit]: Sample message

The format string specifies that the logger should first print the time value of the log event without size restriction, then the priority of the log event with a minimum and maximum size of 5, then the category of the log event right justified with a minimum and maximum size of 10, followed by the message of the log event without any size restriction.

Version:: $Id: PatternFormatter.java 30977 2004-07-30 08:57:54Z niclas $
Author:: Avalon Development Team, Peter Donald, Sylvain Wallez, Leif Mortenson

Nested Class Summary
`protected static class`	`PatternFormatter.PatternRun`

Field Summary
`protected static int`	`MAX_TYPE` The maximum value used for TYPEs.

Constructor Summary
`PatternFormatter(java.lang.String pattern)` Creation of a new patter formatter baseed on a supplied pattern.

Method Summary
`java.lang.String`	`format(LogEvent event)` Format the event according to the pattern.
`protected java.lang.String`	`formatPatternRun(LogEvent event, PatternFormatter.PatternRun run)` Formats a single pattern run (can be extended in subclasses).
`protected java.lang.String`	`getCategory(java.lang.String category, java.lang.String format)` Utility method to format category.
`protected java.lang.String`	`getContextMap(ContextMap map, java.lang.String format)` Utility method to format context map.
`protected java.lang.String`	`getMessage(java.lang.String message, java.lang.String format)` Utility method to format message.
`protected java.lang.String`	`getPriority(Priority priority, java.lang.String format)` Get formatted priority string.
`protected java.lang.String`	`getRTime(long time, java.lang.String format)` Utility method to format relative time.
`protected java.lang.String`	`getStackTrace(java.lang.Throwable throwable, java.lang.String format)` Utility method to format stack trace.
`protected java.lang.String`	`getThread(java.lang.String format)` Get formatted thread string.
`protected java.lang.String`	`getTime(long time, java.lang.String format)` Utility method to format time.
`protected int`	`getTypeIdFor(java.lang.String type)` Retrieve the type-id for a particular string.
`protected void`	`parse(java.lang.String patternString)` Parse the input pattern and build internal data structures.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

MAX_TYPE

protected static final int MAX_TYPE

The maximum value used for TYPEs. Subclasses can define their own TYPEs starting at MAX_TYPE + 1.

See Also:: Constant Field Values

Constructor Detail