Class: Pool

Inherits:
Object
  • Object
show all
Defined in:
lib/spannerlib/pool.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(id) ⇒ Pool

Returns a new instance of Pool.



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# File 'lib/spannerlib/pool.rb', line 23

def initialize(id)
  @id = id
  @closed = false
end

Instance Attribute Details

#id ⇒ Object (readonly)

Returns the value of attribute id.



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# File 'lib/spannerlib/pool.rb', line 21

def id
  @id
end

Class Method Details

.create_pool(dsn) ⇒ Object

Create a new Pool given a DSN string. Raises SpannerLibException on failure.

Raises:



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# File 'lib/spannerlib/pool.rb', line 29

def self.create_pool(dsn)
  begin
    pool_id = SpannerLib.create_pool(dsn)
  rescue StandardError => e
    raise SpannerLibException, e.message
  end

  raise SpannerLibException, "failed to create pool" if pool_id.nil? || pool_id <= 0

  Pool.new(pool_id)
end

Instance Method Details

#close ⇒ Object

Close this pool and free native resources.



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# File 'lib/spannerlib/pool.rb', line 42

def close
  return if @closed

  SpannerLib.close_pool(@id)
  @closed = true
end

#create_connection ⇒ Object

Create a new Connection associated with this Pool.

Raises:



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# File 'lib/spannerlib/pool.rb', line 50

def create_connection
  raise SpannerLibException, "pool closed" if @closed

  begin
    conn_id = SpannerLib.create_connection(@id)
  rescue StandardError => e
    raise SpannerLibException, e.message
  end

  raise SpannerLibException, "failed to create connection" if conn_id.nil? || conn_id <= 0

  Connection.new(@id, conn_id)
end