Status Hooks

When a Container starts, stops, becomes idle, and errors, it can trigger code execution in a Worker that has defined status hooks on the Container class. Refer to the Container package docs ↗ for more details.

TypeScript

import { Container } from "@cloudflare/containers";

export class MyContainer extends Container {
  defaultPort = 4000;
  sleepAfter = "5m";

  override onStart() {
    console.log("Container successfully started");
  }

  override onStop(stopParams) {
    if (stopParams.exitCode === 0) {
      console.log("Container stopped gracefully");
    } else {
      console.log("Container stopped with exit code:", stopParams.exitCode);
    }

    console.log("Container stop reason:", stopParams.reason);
  }

  override async onActivityExpired() {
    console.log("Container became idle, stopping it now");
    await this.stop();
  }

  override onError(error: string) {
    console.log("Container error:", error);
  }
}

Explain Code