Class: Fluent::Plugin::Sqlite3Output

Inherits:
Output
  • Object
show all
Defined in:
lib/fluent/plugin/out_sqlite3.rb

Constant Summary collapse

DEFAULT_BUFFER_TYPE = 
"memory"
DELIMITER = 
/ *, */

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Sqlite3Output

Returns a new instance of Sqlite3Output.



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 21

def initialize
  super
end

Instance Method Details

#configure(conf) ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 25

def configure(conf)
  compat_parameters_convert(conf, :buffer)
  super
  @type = conf["type"]
  if (@table and not(@columns)) or (not(@table) and @columns)
    raise "strict mode requires table and columns parameters"
  end
end

#format(tag, time, record) ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 58

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

#formatted_to_msgpack_binary? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/fluent/plugin/out_sqlite3.rb', line 74

def formatted_to_msgpack_binary?
  true
end

#shutdown ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 51

def shutdown
  log.debug "shutdown"
  @stmts.each {|k,v| v.close}
  @db.close
  super
end

#start ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 36

def start
  super
  @db = ::SQLite3::Database.new @path
  @stmts = {}
  if @table
    cols = @columns.split(DELIMITER).map {|e| ":#{e}"}.join(",")
    @stmts[@table] = @db.prepare "INSERT INTO #{@table}(#{@columns}) VALUES(#{cols})"
  end
end

#to_insert(table, columns) ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 46

def to_insert(table, columns)
  cols = columns.split(DELIMITER).map {|e| ":#{e}"}.join(",")
  "INSERT INTO #{table}(#{columns}) VALUES(#{cols})"
end

#write(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 62

def write(chunk)
  @db.transaction
  begin
    write1(chunk)
    @db.commit
  rescue => ex
    @db.rollback
    log.error "rollback: ", ex
    raise
  end
end

#write1(chunk) ⇒ Object 



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# File 'lib/fluent/plugin/out_sqlite3.rb', line 78

def write1(chunk)
  chunk.msgpack_each do |tag, time, record|
    if record.keys.length == 0
      log.warn "no any keys for #{tag}"
      return
    end
    table = (@table or tag.split('.')[1]) # param 'table' or 2nd later part of tag.
    if @includes
      (record.keys - @includes.split(DELIMITER)).each {|e| record.delete e}
    end
    if @excludes
      @excludes.split(DELIMITER).each {|e| record.delete e}
    end
    unless @stmts[table]
      cols = record.keys.join ","
      @db.execute "CREATE TABLE IF NOT EXISTS #{table} (id INTEGER PRIMARY KEY AUTOINCREMENT,#{cols})"
      @stmts[table] = @db.prepare (a = to_insert(table, cols))
      log.debug "create a new table, #{table.upcase} (it may have been already created)"
    end
    @stmts[table].execute record
  end
end