patroni.postgresql.callback_executor module
- class patroni.postgresql.callback_executor.CallbackAction(*values)
-
- NOOP = 'noop'
- ON_RELOAD = 'on_reload'
- ON_RESTART = 'on_restart'
- ON_ROLE_CHANGE = 'on_role_change'
- ON_START = 'on_start'
- ON_STOP = 'on_stop'
- class patroni.postgresql.callback_executor.CallbackExecutor
Bases:
CancellableExecutor,Thread- __init__()
This constructor should always be called with keyword arguments. Arguments are:
group should be None; reserved for future extension when a ThreadGroup class is implemented.
target is the callable object to be invoked by the run() method. Defaults to None, meaning nothing is called.
name is the thread name. By default, a unique name is constructed of the form “Thread-N” where N is a small decimal number.
args is a list or tuple of arguments for the target invocation. Defaults to ().
kwargs is a dictionary of keyword arguments for the target invocation. Defaults to {}.
context is the contextvars.Context value to use for the thread. The default value is None, which means to check sys.flags.thread_inherit_context. If that flag is true, use a copy of the context of the caller. If false, use an empty context. To explicitly start with an empty context, pass a new instance of contextvars.Context(). To explicitly start with a copy of the current context, pass the value from contextvars.copy_context().
If a subclass overrides the constructor, it must make sure to invoke the base class constructor (Thread.__init__()) before doing anything else to the thread.
- call(cmd: List[str]) None
Executes one callback at a time.
Already running command is killed (including child processes). If it couldn’t be killed we wait until it finishes.
- Parameters:
cmd – command to be executed
- run() None
Method representing the thread’s activity.
You may override this method in a subclass. The standard run() method invokes the callable object passed to the object’s constructor as the target argument, if any, with sequential and keyword arguments taken from the args and kwargs arguments, respectively.