Class: Charrington::AlterPostgresTable

Inherits:
Object
  • Object
show all
Includes:
LogStash::Util::Loggable, Service
Defined in:
lib/logstash/outputs/charrington/alter_postgres_table.rb

Overview

This service will add columns to an existing table dynamically based on finding new keys in the JSON structure. This is potentially called from Insert when an insert fails.

Constant Summary collapse

Error = 
Class.new(StandardError)
AlterFailed = 
Class.new(Error)

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Service

included

Constructor Details

#initialize(connection, event, schema, table_name, columns) ⇒ AlterPostgresTable

Returns a new instance of AlterPostgresTable.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 17

def initialize(connection, event, schema, table_name, columns)
  @connection = connection
  @event = event.to_hash
  @table_name = table_name
  @schema = schema
  @columns = columns
  @column_types = []
end

Instance Attribute Details

#column_types ⇒ Object

Returns the value of attribute column_types.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 12

def column_types
  @column_types
end

#columns ⇒ Object (readonly)

Returns the value of attribute columns.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 11

def columns
  @columns
end

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 11

def connection
  @connection
end

#event ⇒ Object (readonly)

Returns the value of attribute event.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 11

def event
  @event
end

#schema ⇒ Object (readonly)

Returns the value of attribute schema.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 11

def schema
  @schema
end

#table_name ⇒ Object (readonly)

Returns the value of attribute table_name.



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 11

def table_name
  @table_name
end

Instance Method Details

#call ⇒ Object 



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# File 'lib/logstash/outputs/charrington/alter_postgres_table.rb', line 26

def call
  set_column_types
  alter_table
  true
rescue StandardError => e
  raise AlterFailed, e.message
ensure
  @column_types.clear if @column_types.is_a? Array
end