Class: Fluent::CouchOutput

Inherits:
BufferedOutput
  • Object
show all
Includes:
SetTagKeyMixin, SetTimeKeyMixin
Defined in:
lib/fluent/plugin/out_couch.rb

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CouchOutput

Returns a new instance of CouchOutput.



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# File 'lib/fluent/plugin/out_couch.rb', line 30

def initialize
	super

	require 'msgpack'
	require 'jsonpath'
	Encoding.default_internal = 'UTF-8'
	require 'couchrest'
	Encoding.default_internal = 'ASCII-8BIT'
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 41

def configure(conf)
	super
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 94

def format(tag, time, record)
	record.to_msgpack
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 89

def shutdown
	super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 46

def start
	super

	if @db_key or @db_per
		raise "update_docs is not compatible with db_key or db_per yet!" if @update_docs
		raise "refresh_view_index is not compatible with db_key or db_per yet!" if @refresh_view_index
	end

	@account = "#{@user}:#{@password}@" if @user && @password

	@db = {}

	#
	# todo : doesn't work
	#
	if @db_per and @db_key
		@write = self.method :write_by_key_per
	elsif @db_per
		raise "todo: do not currenty support db_per without db_key"
	elsif @db_key
		@write = self.method :write_by_key
	else
		@write = self.method :write_default
	end

	if not @db_key or @db_per
		@db[:default] = CouchRest.database!("#{@protocol}://#{@account}#{@host}:#{@port}/#{@database}")
	end

	@views = []

	if @refresh_view_index
		begin
			@db[:default].get("_design/#{@refresh_view_index}")['views'].each do |view_name, func|
				@views.push([@refresh_view_index, view_name])
			end
		rescue
			$log.error 'design document not found!'
		end
	end
end

#update_docs(records) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 183

def update_docs(records)

	if records.length > 0
		records.each do |record|
			doc = nil

			begin
				doc = @db[:default].get(record['_id'])
			rescue
			end

			record['_rev']=doc['_rev'] unless doc.nil?
			$log.debug record
			@db[:default].save_doc(record)
		end
	end
end

#update_view_index ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 202

def update_view_index()
	@views.each do |design, view|
		@db[:default].view("#{design}/#{view}", {'limit' => '0'})
	end
end

#write(chunk) ⇒ Object

todo : this sucks



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# File 'lib/fluent/plugin/out_couch.rb', line 100

def write(chunk)
	if @db_per and @db_key
		write_by_key_per chunk
	elsif @db_per
		raise "todo: do not currenty support db_per without db_key"
	elsif @db_key
		write_by_key chunk
	else
		write_default chunk
	end
end

#write_by_key(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 159

def write_by_key(chunk)
	records ={}

	chunk.msgpack_each do |record|
		id = record[@doc_key_field]
		id = JsonPath.new(@doc_key_jsonpath).first(record) if id.nil? && !@doc_key_jsonpath.nil?
		record['_id'] = id unless id.nil?

		key =  record[@db_key]
		records[key] = [] unless records[key]
		records[key] << record
	end

	records.each_pair do |key, data|
		if not @db[key]
			@db[key] = CouchRest.database!("#{@protocol}://#{@account}#{@host}:#{@port}/#{@database+"_"+key}")
		end

		@db[key].bulk_save(data)
	end

end

#write_by_key_per(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 132

def write_by_key_per(chunk)
	records = {}

	chunk.msgpack_each do |record|
		id = record[@doc_key_field]
		id = JsonPath.new(@doc_key_jsonpath).first(record) if id.nil? && !@doc_key_jsonpath.nil?
		record['_id'] = id unless id.nil?

		date = record['dt']

		key = "#{record[@db_key].downcase}_#{date[0]}#{date[1].to_s.rjust(2, '0')}#{date[2].to_s.rjust(2, '0')}"

		records[key] = [] unless records[key]
		records[key] << record
	end

	records.each_pair do |key, data|
		if not @db[key]
			@db[key] = CouchRest.database!("#{@protocol}://#{@account}#{@host}:#{@port}/#{@database+"_"+key}")
		end

		@db[key].bulk_save(data)
	end

end

#write_default(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_couch.rb', line 111

def write_default(chunk)
	records = []

	chunk.msgpack_each do |record|

		id = record[@doc_key_field]
		id = JsonPath.new(@doc_key_jsonpath).first(record) if id.nil? && !@doc_key_jsonpath.nil?
		record['_id'] = id unless id.nil?
		records << record
	end

	if @update_docs
		update_docs(records)
	else
		@db[:default].bulk_save(records)
	end

	update_view_index
end