Shutdown

Random shutdown component that crashes a process using various methods.

Implements: IConfigurable, IOpenable

Description

The Shutdown class allows you to create a random shutdown component that crashes a process using various methods.

Important points

  • The component is usually used for testing, but it can also be used in production to randomly crash microservices.
  • It follows the concept of “Chaos Monkey” popularized by Netflix.

Configuration parameters

  • mode: None - crash by NullPointer excepiton, zero - crash by dividing by zero, exception = crash by unhandled exception, exit - exit the process
  • min_timeout: minimum crash timeout in milliseconds (default: 5 mins)
  • max_timeout: maximum crash timeout in milliseconds (default: 15 minutes)

Instance methods

close

Closes a component and frees used resources.

close(correlation_id: Optional[str])

  • correlation_id: Optional[str] - (optional) transaction id to trace execution through a call chain.

configure

Configures a component by passing configuration parameters.

configure(config: ConfigParams)

  • config: ConfigParams - configuration parameters to be set.

is_open

Checks if the component is opened.

is_open(): bool

  • returns: bool - true if the component has been opened and false otherwise.

open

Opens the component.

open(correlation_id: Optional[str])

  • correlation_id: Optional[str] - (optional) transaction id to trace execution through call chain.

shutdown

Crashes the process using the configured crash mode.

shutdown()

Examples

shutdown = Shutdown()
shutdown.configure(ConfigParams.from_tuples(
    "mode": "exception"
))
shutdown.shutdown()         # Result: Bang!!! the process crashes