Class: HbaseAdapter::Connection

Inherits:
Object
  • Object
show all
Defined in:
lib/hbase_adapter/connection.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Connection

Returns a new instance of Connection.



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# File 'lib/hbase_adapter/connection.rb', line 7

def initialize(options)
  @host = options[:host] || options["host"]
  @port = options[:port] || options["port"]
  
  @client = nil
end

Instance Attribute Details

#host ⇒ Object (readonly)

Returns the value of attribute host.



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# File 'lib/hbase_adapter/connection.rb', line 5

def host
  @host
end

#port ⇒ Object (readonly)

Returns the value of attribute port.



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# File 'lib/hbase_adapter/connection.rb', line 5

def port
  @port
end

Instance Method Details

#client ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 18

def client
  connect! unless connected?
  @client
end

#connect! ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 23

def connect!
  t = Thrift::BufferedTransport.new(Thrift::Socket.new(host, port))
  p = Thrift::BinaryProtocol.new(t)
  c = Apache::Hadoop::Hbase::Thrift::Hbase::Client.new(p)
  t.open
  
  @client = c
end

#connected? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/hbase_adapter/connection.rb', line 14

def connected? 
  @client
end

#create_table!(table_name, *column_families) ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 43

def create_table!(table_name, *column_families)
  client.createTable(table_name.to_s, column_families.map {|cd| cd.column_descriptor})
end

#delete_table!(table_name) ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 47

def delete_table!(table_name)
  client.disableTable(table_name.to_s)
  client.deleteTable(table_name.to_s)
end

#table_names ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 32

def table_names
  client.getTableNames
end

#tables ⇒ Object 



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# File 'lib/hbase_adapter/connection.rb', line 36

def tables
  table_names.inject({}) do|hash, table_name|
    hash[table_name.to_sym] = HbaseAdapter::Table.new(client, table_name)
    hash
  end
end