Class: Fluent::MysqlReplicatorInput
- Inherits:
-
Input
- Object
- Input
- Fluent::MysqlReplicatorInput
- Defined in:
- lib/fluent/plugin/in_mysql_replicator.rb
Instance Method Summary collapse
- #configure(conf) ⇒ Object
- #emit_record(tag, record) ⇒ Object
- #format_tag(tag, param) ⇒ Object
- #get_connection ⇒ Object
- #hash_delete_by_list(hash, deleted_keys) ⇒ Object
-
#initialize ⇒ MysqlReplicatorInput
constructor
A new instance of MysqlReplicatorInput.
- #poll ⇒ Object
- #query(query, con = nil) ⇒ Object
- #run ⇒ Object
- #shutdown ⇒ Object
- #start ⇒ Object
Constructor Details
#initialize ⇒ MysqlReplicatorInput
Returns a new instance of MysqlReplicatorInput.
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 10 def initialize require 'mysql2' require 'digest/sha1' super end |
Instance Method Details
#configure(conf) ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 29 def configure(conf) super @interval = Config.time_value(@interval) if @tag.nil? raise Fluent::ConfigError, "mysql_replicator: missing 'tag' parameter. Please add following line into config like 'tag replicator.mydatabase.mytable.${event}.${primary_key}'" end $log.info "adding mysql_replicator worker. :tag=>#{tag} :query=>#{@query} :prepared_query=>#{@prepared_query} :interval=>#{@interval}sec :enable_delete=>#{enable_delete}" end |
#emit_record(tag, record) ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 135 def emit_record(tag, record) router.emit(tag, Engine.now, record) end |
#format_tag(tag, param) ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 127 def format_tag(tag, param) pattern = {'${event}' => param[:event].to_s, '${primary_key}' => @primary_key} tag.gsub(/(\${[a-z_]+})/) do $log.warn "mysql_replicator: missing placeholder. :tag=>#{tag} :placeholder=>#{$1}" unless pattern.include?($1) pattern[$1] end end |
#get_connection ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 151 def get_connection begin return Mysql2::Client.new({ :host => @host, :port => @port, :username => @username, :password => @password, :database => @database, :encoding => @encoding, :reconnect => true, :stream => true, :cache_rows => false }) rescue Exception => e $log.warn "mysql_replicator: #{e}" sleep @interval retry end end |
#hash_delete_by_list(hash, deleted_keys) ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 123 def hash_delete_by_list (hash, deleted_keys) deleted_keys.each{|k| hash.delete(k)} end |
#poll ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 58 def poll table_hash = Hash.new ids = Array.new con = get_connection() prepared_con = get_connection() loop do rows_count = 0 start_time = Time.now previous_ids = ids current_ids = Array.new if !@prepared_query.nil? @prepared_query.split(/;/).each do |query| prepared_con.query(query) end end rows, con = query(@query, con) rows.each do |row| current_ids << row[@primary_key] current_hash = Digest::SHA1.hexdigest(row.flatten.join) row.each {|k, v| row[k] = v.to_s if v.is_a?(Time) || v.is_a?(Date) || v.is_a?(BigDecimal)} row.select {|k, v| v.to_s.strip.match(/^SELECT/i) }.each do |k, v| row[k] = [] unless row[k].is_a?(Array) nest_rows, prepared_con = query(v.gsub(/\$\{([^\}]+)\}/, row[$1].to_s), prepared_con) nest_rows.each do |nest_row| nest_row.each {|k, v| nest_row[k] = v.to_s if v.is_a?(Time) || v.is_a?(Date) || v.is_a?(BigDecimal)} row[k] << nest_row end prepared_con.close end if row[@primary_key].nil? $log.error "mysql_replicator: missing primary_key. :tag=>#{tag} :primary_key=>#{primary_key}" break end if !table_hash.include?(row[@primary_key]) tag = format_tag(@tag, {:event => :insert}) emit_record(tag, row) elsif table_hash[row[@primary_key]] != current_hash tag = format_tag(@tag, {:event => :update}) emit_record(tag, row) end table_hash[row[@primary_key]] = current_hash rows_count += 1 end con.close ids = current_ids if @enable_delete if previous_ids.empty? deleted_ids = [*1...current_ids.max] - current_ids else deleted_ids = previous_ids - current_ids end if deleted_ids.count > 0 hash_delete_by_list(table_hash, deleted_ids) deleted_ids.each do |id| tag = format_tag(@tag, {:event => :delete}) emit_record(tag, {@primary_key => id}) end end end elapsed_time = sprintf("%0.02f", Time.now - start_time) $log.info "mysql_replicator: finished execution :tag=>#{tag} :rows_count=>#{rows_count} :elapsed_time=>#{elapsed_time} sec" sleep @interval end end |
#query(query, con = nil) ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 139 def query(query, con = nil) begin con = con.nil? ? get_connection : con con = con.ping ? con : get_connection return con.query(query), con rescue Exception => e $log.warn "mysql_replicator: #{e}" sleep @interval retry end end |
#run ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 48 def run begin poll rescue StandardError => e $log.error "mysql_replicator: failed to execute query." $log.error "error: #{e.}" $log.error e.backtrace.join("\n") end end |
#shutdown ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 44 def shutdown Thread.kill(@thread) end |
#start ⇒ Object
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# File 'lib/fluent/plugin/in_mysql_replicator.rb', line 40 def start @thread = Thread.new(&method(:run)) end |