Outline of the construct-init-start-stop lifecycle pattern

lifecycle.py

class AbstractFoo {
  int bar;
  int baz;
  Client client;

  static create(bar, baz, client) {
    this.bar = bar;
    this.baz = baz;
    this.client = client;
  }

  init() {
    client.establishConnection();
  }

  start() {
    this.client.streamData();
  }

  stop() {
    this.client.disconnect();
  }
}

class ConcreteFoo {
  OtherClient concreteClient;

  static create(bar, baz, client, concreteClient) {
    super.create(bar, baz, client);
    this.concreteClient = concreteClient;
  }

  init() {
    super.init()
    concreteClient.establishConnection();
  }

  start() {
    super.start();
    this.concreteClient.registerCallback(this.handle);
  }

  stop() {
    super.stop()
    this.concreteClient.disconnect();
  }
}

run() {
  try {
    AbstractFoo foo = new ConcreteFoo('bar', 'baz', new thirdPartyApiClient(), new dbClient());
    foo.init();
    foo.start();
  } catch (ShutdownEvent) {
    foo.stop();
  }
}