Class: DB::Client

Inherits:
Object
  • Object
show all
Defined in:
lib/db/client.rb

Overview

Binds a connection pool to the specified adapter.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(adapter, **options) ⇒ Client

Initialize the client and internal connection pool using the specified adapter.



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# File 'lib/db/client.rb', line 35

def initialize(adapter, **options)
  @adapter = adapter
  
  @pool = connect(**options)
end

Instance Attribute Details

#adapter ⇒ Object

The adapter used for making connections.



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# File 'lib/db/client.rb', line 43

def adapter
  @adapter
end

Instance Method Details

#close ⇒ Object

Close all open connections in the connection pool.



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# File 'lib/db/client.rb', line 46

def close
  @pool.close
end

#session(statement = nil, **options) ⇒ Object

Acquires a connection and sends the specified statement if given.



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# File 'lib/db/client.rb', line 55

def session(statement = nil, **options)
  session = Context::Session.new(@pool, **options)
  
  if statement
    session.send_query(statement)
  end
  
  return session unless block_given?
  
  begin
    yield session
  ensure
    session.close
  end
end

#transaction(statement = "BEGIN", **options) ⇒ Object

Acquires a connection and starts a transaction.



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# File 'lib/db/client.rb', line 76

def transaction(statement = "BEGIN", **options)
  transaction = Context::Transaction.new(@pool, **options)
  
  if statement
    transaction.call("BEGIN")
  end
  
  return transaction unless block_given?
  
  begin
    yield transaction
    
    transaction.commit
  ensure
    transaction.abort if $!
  end
end