Apache log4cxx  Version 0.10.0
AndFilter Class Reference

A filter that 'and's the results of any number of contained filters together. More...

Inheritance diagram for AndFilter:
Filter OptionHandler ObjectImpl Object Object

Public Member Functions

 AndFilter ()
void addFilter (const log4cxx::spi::FilterPtr &filter)
void setAcceptOnMatch (bool acceptOnMatch)
FilterDecision decide (const spi::LoggingEventPtr &event) const
- Public Member Functions inherited from Filter
 Filter ()
void addRef () const
void releaseRef () const
log4cxx::spi::FilterPtr getNext () const
void setNext (const log4cxx::spi::FilterPtr &newNext)
void activateOptions (log4cxx::helpers::Pool &p)
 Usually filters options become active when set. More...
void setOption (const LogString &option, const LogString &value)
 Set option to value. More...
- Public Member Functions inherited from OptionHandler
virtual ~OptionHandler ()
- Public Member Functions inherited from Object
virtual const helpers::ClassgetClass () const
virtual ~Object ()
virtual bool instanceof (const Class &clazz) const =0
virtual const void * cast (const Class &clazz) const =0
- Public Member Functions inherited from ObjectImpl
 ObjectImpl ()
virtual ~ObjectImpl ()

Additional Inherited Members

- Public Types inherited from Filter
enum  FilterDecision { DENY = -1, NEUTRAL = 0, ACCEPT = 1 }
- Static Public Member Functions inherited from Object
static const helpers::ClassgetStaticClass ()
static const log4cxx::helpers::ClassRegistrationregisterClass ()
- Protected Attributes inherited from ObjectImpl
unsigned int volatile ref

Detailed Description

A filter that 'and's the results of any number of contained filters together.

For the filter to process events, all contained filters must return Filter::ACCEPT.

If the contained filters do not return Filter::ACCEPT, Filter::NEUTRAL is returned.

If acceptOnMatch is set to true, Filter::ACCEPT is returned. If acceptOnMatch is set to false, Filter::DENY is returned.

Here is an example config that will accept only events that contain BOTH a DEBUG level AND 'test' in the message:

<appender name="STDOUT" class="org.apache.log4j.ConsoleAppender"> <filter class="org.apache.log4j.filter.AndFilter"> <filter class="org.apache.log4j.filter.LevelMatchFilter"> <param name="levelToMatch" value="DEBUG" /> <param name="acceptOnMatch" value="true" /> </filter> <filter class="org.apache.log4j.filter.StringMatchFilter"> <param name="stringToMatch" value="test" /> <param name="acceptOnMatch" value="true" /> </filter> <param name="acceptOnMatch" value="false"/> </filter> <filter class="org.apache.log4j.filter.DenyAllFilter"/> <layout class="org.apache.log4j.SimpleLayout"/> </appender>

To accept all events EXCEPT those events that contain a DEBUG level and 'test' in the message: change the AndFilter's acceptOnMatch param to false and remove the DenyAllFilter

NOTE: If you are defining a filter that is only relying on logging event content (no external or filter-managed state), you could opt instead to use an ExpressionFilter with one of the following expressions:

LEVEL == DEBUG && MSG ~= 'test' or ! ( LEVEL == DEBUG && MSG ~= 'test' )

Constructor & Destructor Documentation

AndFilter ( )

Member Function Documentation

void addFilter ( const log4cxx::spi::FilterPtr filter)
FilterDecision decide ( const spi::LoggingEventPtr event) const

If the decision is DENY, then the event will be dropped. If the decision is NEUTRAL, then the next filter, if any, will be invoked. If the decision is ACCEPT then the event will be logged without consulting with other filters in the chain.

eventThe LoggingEvent to decide upon.
The decision of the filter.

Implements Filter.

void setAcceptOnMatch ( bool  acceptOnMatch)

The documentation for this class was generated from the following file: