class ActiveRecord::ConnectionAdapters::RedshiftAdapter::StatementPool
Public Class Methods
new(connection, max)
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Calls superclass method
# File lib/active_record/connection_adapters/redshift_adapter.rb, line 142 def initialize(connection, max) super @counter = 0 @cache = Hash.new { |h,pid| h[pid] = {} } end
Public Instance Methods
[](key)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 150 def [](key); cache[key]; end
[]=(sql, key)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 157 def []=(sql, key) while @max <= cache.size dealloc(cache.shift.last) end @counter += 1 cache[sql] = key end
clear()
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 165 def clear cache.each_value do |stmt_key| dealloc stmt_key end cache.clear end
delete(sql_key)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 172 def delete(sql_key) dealloc cache[sql_key] cache.delete sql_key end
each(&block)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 148 def each(&block); cache.each(&block); end
key?(key)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 149 def key?(key); cache.key?(key); end
length()
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 151 def length; cache.length; end
next_key()
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 153 def next_key "a#{@counter + 1}" end
Private Instance Methods
cache()
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 179 def cache @cache[Process.pid] end
connection_active?()
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 187 def connection_active? @connection.status == PGconn::CONNECTION_OK rescue PGError false end
dealloc(key)
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# File lib/active_record/connection_adapters/redshift_adapter.rb, line 183 def dealloc(key) @connection.query "DEALLOCATE #{key}" if connection_active? end