| from abc import abstractmethod |
| |
| from twitter.common.lang import Interface |
| |
| |
| class PackageInstaller(Interface): |
| """ |
| Responsible for installing MySQL and dependent packages. |
| |
| NOTE: It is not responsible for installing DB instances. |
| """ |
| |
| class Error(Exception): pass |
| |
| @abstractmethod |
| def install(self): |
| """ |
| :return: The environment variables necessary for MySQL to execute. |
| :rtype: dict |
| """ |
| pass |
| |
| |
| class PackageInstallerProvider(Interface): |
| @abstractmethod |
| def from_task(self, task, sandbox): |
| """ |
| Factory method that creates a PackageInstaller instance from 'task' (TaskInfo). |
| |
| :return: The PackageInstaller instance. |
| """ |
| pass |
