Class: HbaseAdapter::Row

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(connection, table, key) ⇒ Row

Returns a new instance of Row.



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# File 'lib/hbase_adapter/row.rb', line 8

def initialize(connection, table, key)
  @connection = connection
  @table = table
  @key = key
end

Instance Attribute Details

#connection ⇒ Object (readonly)

Returns the value of attribute connection.



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# File 'lib/hbase_adapter/row.rb', line 6

def connection
  @connection
end

#key ⇒ Object (readonly)

Returns the value of attribute key.



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# File 'lib/hbase_adapter/row.rb', line 6

def key
  @key
end

#table ⇒ Object (readonly)

Returns the value of attribute table.



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# File 'lib/hbase_adapter/row.rb', line 6

def table
  @table
end

Instance Method Details

#[](column, options = {}) ⇒ Object 



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

def [](column, options = {})
  num_versions = options[:num_versions]
  timestamp = options[:timestamp]

  if num_versions.nil? && timestamp.nil?
    # One column, no options.  Simple get.  Return a single cell
    tcell = connection.client.get(table.name, key, column).first
    HbaseAdapter::Cell.new(connection, self, column, tcell) if tcell
  else
    if timestamp.nil?
      # One column, versions specified.  getVer
      tcells = connection.client.getVer(table.name, key, column, num_versions)
    else
      # One column, versions specified, max time specified.  getVerTs
      tcells = connection.client.getVerTs(table.name, key, column, timestamp.to_i64, num_versions)
    end
    
    tcells.compact.map {|tcell| HbaseAdapter::Cell.new(connection, self, column, tcell)}
  end
end

#cells(*columns) ⇒ Object 



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# File 'lib/hbase_adapter/row.rb', line 35

def cells(*columns)
  options = columns.pop if columns.last.is_a?(Hash)
  options ||= {}
  timestamp = options[:timestamp]
  
  if columns.empty?
    if timestamp.nil?
      # getRow
      trow_results = connection.client.getRow(table.name, key)
    else
      # getRowTs
      trow_results = connection.client.getRowTs(table.name, key, timestamp.to_i64)
    end
  else
    if timestamp.nil?
      # getRowWithColumns
      trow_results = connection.client.getRowWithColumns(table.name, key, columns)
    else
      # getRowWithColumnsTs
      trow_results = connection.client.getRowWithColumnsTs(table.name, key, columns, timestamp.to_i64)
    end
  end

  unless trow_results.empty?
    trow_results.first.columns.inject({}) do |hash, (col_name, tcell)|
      hash[col_name.to_sym] = HbaseAdapter::Cell.new(connection, self, col_name, tcell) if tcell
      hash
    end
  end
end

#delete!(col, options = {}) ⇒ Object 



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# File 'lib/hbase_adapter/row.rb', line 66

def delete!(col, options = {})
  timestamp = options[:timestamp]
  
  if timestamp.nil?
    connection.client.deleteAll(table.name, key.to_s, col.to_s)
  else
    connection.client.deleteAllTs(table.name, key.to_s, col.to_s, timestamp.to_i64)
  end
end

#mutate!(options = {}, &blk) ⇒ Object 



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# File 'lib/hbase_adapter/row.rb', line 76

def mutate!(options = {}, &blk)
  timestamp = options[:timestamp]
  
  ml = HbaseAdapter::MutationList.new(&blk)
  
  if timestamp.nil?
    connection.client.mutateRow(table.name, key, ml.to_thrift)
  else
    connection.client.mutateRowTs(table.name, key, ml.to_thrift, timestamp.to_i64)
  end
end