Class: ApacheCrunch::ElementValueFetcher

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

Overview

Finds a value from an Entry. Value may be directly from log or derived.

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ElementValueFetcher

Returns a new instance of ElementValueFetcher.



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# File 'lib/element_value_fetcher.rb', line 4

def initialize
    @_RawValueFetcher = RawValueFetcher
    @_DerivedValueFetcher = DerivedValueFetcher
end

Instance Method Details

#dep_inject!(raw_value_fetcher_cls, derived_value_fetcher_cls) ⇒ Object

Handles dependency injection



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# File 'lib/element_value_fetcher.rb', line 10

def dep_inject!(raw_value_fetcher_cls, derived_value_fetcher_cls)
    @_RawValueFetcher = raw_value_fetcher_cls
    @_DerivedValueFetcher = derived_value_fetcher_cls
end

#fetch(entry, element_name) ⇒ Object

Returns the value of the element with the given name from the Entry instance.

So element_name might be :minute or :reqheader_firstline for instance.



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

def fetch(entry, element_name)
    v = @_RawValueFetcher.new.fetch(entry, element_name)
    return v unless v.nil?

    v = @_DerivedValueFetcher.new.fetch(entry, element_name)
    return v unless v.nil?

    nil
end