Class: SolidObjects::DatabaseAdapters::Mysql

Inherits:
SolidObjects::DatabaseAdapter show all
Defined in:
lib/solid_objects/database_adapters/mysql.rb,
sig/generated/lib/solid_objects/database_adapters/mysql.rbs

Instance Attribute Summary

Attributes inherited from SolidObjects::DatabaseAdapter

#connection_pool, #fixed_connection

Instance Method Summary collapse

Methods inherited from SolidObjects::DatabaseAdapter

#configure_transaction_deadline, #database_now, for, #initialize, #lock_candidates, #transaction, #with_connection, #with_lock_probe, #with_lock_retry

Constructor Details

This class inherits a constructor from SolidObjects::DatabaseAdapter

Instance Method Details

#claim_lock ⇒ String

RBS:

  • () -> String

Returns:

  • (String) 


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# File 'lib/solid_objects/database_adapters/mysql.rb', line 12

def claim_lock
  "FOR UPDATE SKIP LOCKED"
end

#current_time_expression ⇒ String

RBS:

  • () -> String

Returns:

  • (String) 


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# File 'lib/solid_objects/database_adapters/mysql.rb', line 17

def current_time_expression
  "CURRENT_TIMESTAMP(6)"
end

#deadline_error?(error) ⇒ Boolean

RBS:

  • (Exception) -> bool

Parameters:

  • (Exception)

Returns:

  • (Boolean) 


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# File 'lib/solid_objects/database_adapters/mysql.rb', line 54

def deadline_error?(error)
  return false unless SyncDeadline.active?
  return true if error.is_a?(ActiveRecord::LockWaitTimeout)

  cause = error
  while cause
    return true if cause.respond_to?(:error_number) && cause.error_number == 3024

    cause = cause.cause
  end
  false
end

#supports_skip_locked? ⇒ Boolean

RBS:

  • () -> bool

Returns:

  • (Boolean) 


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# File 'lib/solid_objects/database_adapters/mysql.rb', line 7

def supports_skip_locked?
  true
end

#with_transaction_deadline(connection) { ... } ⇒ Object

RBS:

  • (untyped) { () -> untyped } -> untyped

Parameters:

  • (Object)

Yields:

Yield Returns:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/solid_objects/database_adapters/mysql.rb', line 24

def with_transaction_deadline(connection)
  return yield unless SyncDeadline.active?

  previous_lock_timeout = connection.select_value(
    "SELECT @@SESSION.innodb_lock_wait_timeout"
  ).to_i
  previous_execution_timeout = connection.select_value(
    "SELECT @@SESSION.max_execution_time"
  ).to_i
  connection.execute(
    "SET SESSION innodb_lock_wait_timeout = #{SyncDeadline.remaining_seconds}"
  )
  connection.execute(
    "SET SESSION max_execution_time = #{SyncDeadline.remaining_milliseconds}"
  )
  yield
ensure
  if previous_lock_timeout
    connection.execute(
      "SET SESSION innodb_lock_wait_timeout = #{previous_lock_timeout}"
    )
  end
  if previous_execution_timeout
    connection.execute(
      "SET SESSION max_execution_time = #{previous_execution_timeout}"
    )
  end
end