Filter LogMessages using a TaQL expression. More...

#include <LogFilterTaql.h>

Inheritance diagram for casa::LogFilterTaql:

Public Member Functions
	LogFilterTaql (const String &expr)
	Construct a filter from a TaQL expression.
	LogFilterTaql (const LogFilterTaql &other)
	Copy `other` to `this`.
LogFilterTaql &	operator= (const LogFilterTaql &other)
virtual	~LogFilterTaql ()
virtual LogFilterTaql *	clone () const
	Clone the object.
virtual Bool	pass (const LogMessage &message) const
	Return True if `message` passes this filter.
Private Attributes
LogFilterExpr *	expr_p

Detailed Description

Filter LogMessages using a TaQL expression.

Intended use:

Public interface

Review Status

Reviewed By:: wbrouw
Date Reviewed:: 1996/08/21
Test programs:: tLogging
Demo programs:: dLogging

Prerequisite

LogMessage

Etymology

Log[Message] Filter.

Synopsis

The LogFilter class is used by the various log sink classes, typically accessed through LogSink , to decide whether a particular LogMessage should be accepted or rejected.

Simple filtering is based on the messages priority. In particular, you typically will choose to only pass messages greater than or equal to NORMAL in priority, but you might choose DEBUGGING to see all messages, or SEVERE to only see messages that report serious problems.

Example

Suppose we wanted to change the global sink so that it prints all messages, including debugging messages:

    LogFilter all(LogMessage::DEBUGGING);
    LogSink::globalSink().filter(all);

Motivation

Definition at line 86 of file LogFilterTaql.h.

Constructor & Destructor Documentation

casa::LogFilterTaql::LogFilterTaql ( const String & expr ) [explicit]

Construct a filter from a TaQL expression.

Only messages matching the expression pass the filter. The field names that can be used in the expression are: TIME, PRIORITY, MESSAGE, LOCATION, OBJECT_ID. All fields are strings, expect for TIME which is a double (MJD in sec.).

casa::LogFilterTaql::LogFilterTaql ( const LogFilterTaql & other )

Copy other to this.

virtual casa::LogFilterTaql::~LogFilterTaql ( ) [virtual]