Class: ApacheCrunch::LogParser

Inherits:
Object
  • Object
show all
Defined in:
lib/log_parser.rb

Overview

Parses a log file given a path and a Format instance

Instance Method Summary collapse

Constructor Details

#initialize(entry_parser) ⇒ LogParser

Initializes the parser with the path to a log file and a EntryParser.



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# File 'lib/log_parser.rb', line 5

def initialize(entry_parser)
    @_entry_parser = entry_parser
    @_log_file = nil

    @_File = File
end

Instance Method Details

#dep_inject!(file_cls) ⇒ Object

Handles dependency injection



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# File 'lib/log_parser.rb', line 13

def dep_inject!(file_cls)
    @_File = file_cls
end

#next_entry ⇒ Object

Returns the next parsed line in the log file as an Entry, or nil if we’ve reached EOF.



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# File 'lib/log_parser.rb', line 18

def next_entry
    while line_text = @_log_file.gets
        # This is if we've reached EOF:
        return nil if line_text.nil?

        entry = @_entry_parser.parse(@_format, line_text)
        # The EntryParser returns nil and writes a warning if the line text doesn't
        # match our expected format.
        next if entry.nil?

        return entry
    end
end

#replace_file!(new_file) ⇒ Object

Replaces the LogParser current file with another. Like, for real, on the filesystem.



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# File 'lib/log_parser.rb', line 49

def replace_file!(new_file)
    @_log_file.close
    @_File.rename(new_file.path, @_log_file.path)
    @_log_file = @_File.open(@_log_file.path)
end

#reset_file! ⇒ Object

Resets the LogParser’s filehandle so we can start over.



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# File 'lib/log_parser.rb', line 33

def reset_file!
    @_log_file.close
    @_log_file = @_File.open(@_log_file.path)
end

#set_file!(new_file) ⇒ Object

Makes the LogParser start parsing a new log file

new_target is a writable file object that the parser should start parsing, and if in_place is true, we actually replace the contents of the current target with those of the new target.



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# File 'lib/log_parser.rb', line 43

def set_file!(new_file)
    @_log_file.close unless @_log_file.nil?
    @_log_file = new_file
end

#set_format!(format) ⇒ Object 



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# File 'lib/log_parser.rb', line 55

def set_format!(format)
    @_format = format
end