Class: LogStash::Filters::Empow::PersistentKeyValueDB

Inherits:
Object
  • Object
show all
Defined in:
lib/logstash/filters/elastic-db.rb

Instance Method Summary collapse

Constructor Details

#initialize(hosts, username, password, index) ⇒ PersistentKeyValueDB

include LogStash::Util::Loggable



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# File 'lib/logstash/filters/elastic-db.rb', line 8

def initialize(hosts, username, password, index)
	#@logger ||= self.logger

	#@logger.debug("opening the local classification db")

	@elastic ||= Elasticsearch::Client.new(:hosts => hosts)
	@index = index

	create_index index
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/logstash/filters/elastic-db.rb', line 104

def close
	#@logger.debug("clsoing the local classification db")
end

#create_index(index) ⇒ Object 



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# File 'lib/logstash/filters/elastic-db.rb', line 19

def create_index(index)
	return if @elastic.indices.exists? index: index

	@elastic.indices.create index: index, body: {
		mappings: {
			_doc: {
				properties: {
					product_type: {
						type: 'keyword'
					},
					product: {
						type: 'keyword'
					},
					term_key: {
						type: 'keyword'
					},
					classification: {
						enabled: false
					}
				}
			}
		}
	}
end

#query(product_type, product, term) ⇒ Object 



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# File 'lib/logstash/filters/elastic-db.rb', line 44

def query(product_type, product, term)
	#@logger.debug("quering local classification db")

	# fix nil product
	if product.nil?
		product = 'nil_safe_product_key'
	end

	response = @elastic.search index: @index, type: '_doc', body: {
		query: {
			bool: {
				must: [
					{ term: { product_type: product_type } },
					{
						bool: {
							should: [
								{
									bool: {
										must: [
											{ term: { term_key: term } },
											{ term: { product: product } }
										]
									}
								},
								{
									bool: {
										must: {
											term: { term_key: term }
										},
										must_not: {
											exists: { field: 'product' }
										}
									}
								}
							]
						}
					}
				]
			}
		}
	}

	mash = Hashie::Mash.new response

	return nil if mash.hits.hits.first.nil?

	return mash.hits.hits.first._source.classification
end

#save(doc_id, product_type, product, term, classification) ⇒ Object 



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# File 'lib/logstash/filters/elastic-db.rb', line 93

def save(doc_id, product_type, product, term, classification)
	#@logger.debug("saving key to local classification db")

	@elastic.index index: @index, type: '_doc', id: doc_id, body: {
		product_type: product_type,
		product: product,
		term_key: term,
		classification: classification
	}
end