Poco

class PatternFormatter

Library: Foundation
Package: Logging
Header: Poco/PatternFormatter.h

Description

This Formatter allows for custom formatting of log messages based on format patterns.

The format pattern is used as a template to format the message and is copied character by character except for the following special characters, which are replaced by the corresponding value.

  • %s - message source
  • %t - message text
  • %l - message priority level (1 .. 7)
  • %p - message priority (Fatal, Critical, Error, Warning, Notice, Information, Debug, Trace)
  • %q - abbreviated message priority (F, C, E, W, N, I, D, T)
  • %P - message process identifier
  • %T - message thread name
  • %I - message thread identifier (numeric)
  • %N - node or host name
  • %U - message source file path (empty string if not set)
  • %u - message source line number (0 if not set)
  • %w - message date/time abbreviated weekday (Mon, Tue, ...)
  • %W - message date/time full weekday (Monday, Tuesday, ...)
  • %b - message date/time abbreviated month (Jan, Feb, ...)
  • %B - message date/time full month (January, February, ...)
  • %d - message date/time zero-padded day of month (01 .. 31)
  • %e - message date/time day of month (1 .. 31)
  • %f - message date/time space-padded day of month ( 1 .. 31)
  • %m - message date/time zero-padded month (01 .. 12)
  • %n - message date/time month (1 .. 12)
  • %o - message date/time space-padded month ( 1 .. 12)
  • %y - message date/time year without century (70)
  • %Y - message date/time year with century (1970)
  • %H - message date/time hour (00 .. 23)
  • %h - message date/time hour (00 .. 12)
  • %a - message date/time am/pm
  • %A - message date/time AM/PM
  • %M - message date/time minute (00 .. 59)
  • %S - message date/time second (00 .. 59)
  • %i - message date/time millisecond (000 .. 999)
  • %c - message date/time centisecond (0 .. 9)
  • %F - message date/time fractional seconds/microseconds (000000 - 999999)
  • %z - time zone differential in ISO 8601 format (Z or +NN.NN)
  • %Z - time zone differential in RFC format (GMT or +NNNN)
  • %L - convert time to local time (must be specified before any date/time specifier; does not itself output anything)
  • %E - epoch time (UTC, seconds since midnight, January 1, 1970)
  • %v[width] - the message source (%s) but text length is padded/cropped to 'width'
  • %[name] - the value of the message parameter with the given name
  • %% - percent sign

Inheritance

Direct Base Classes: Formatter

All Base Classes: Configurable, Formatter, RefCountedObject

Member Summary

Member Functions: format, getPriorityName, getProperty, setProperty

Inherited Functions: duplicate, format, getProperty, referenceCount, release, setProperty

Constructors

PatternFormatter

PatternFormatter();

Creates a PatternFormatter. The format pattern must be specified with a call to setProperty.

PatternFormatter

PatternFormatter(
    const std::string & format
);

Creates a PatternFormatter that uses the given format pattern.

Destructor

~PatternFormatter virtual

~PatternFormatter();

Destroys the PatternFormatter.

Member Functions

format virtual

void format(
    const Message & msg,
    std::string & text
);

Formats the message according to the specified format pattern and places the result in text.

getProperty virtual

std::string getProperty(
    const std::string & name
) const;

Returns the value of the property with the given name or throws a PropertyNotSupported exception if the given name is not recognized.

setProperty virtual

void setProperty(
    const std::string & name,
    const std::string & value
);

Sets the property with the given name to the given value.

The following properties are supported:

  • pattern: The format pattern. See the PatternFormatter class for details.
  • times: Specifies whether times are adjusted for local time or taken as they are in UTC. Supported values are "local" and "UTC".

If any other property name is given, a PropertyNotSupported exception is thrown.

getPriorityName protected static

static const std::string & getPriorityName(
    int
);

Returns a string for the given priority value.

Variables

PROP_PATTERN static

static const std::string PROP_PATTERN;

PROP_TIMES static

static const std::string PROP_TIMES;