@awesome-ecs/workers/dist/systems/index.js

The Workers package for Awesome ECS. Provides basic implementation for the Worker communication using ECS.

import "../chunk-MEIXQAHY.js";
import "../chunk-A5ALYPYH.js";
import "../chunk-TVAABFYA.js";
import "../chunk-HGXB5X2K.js";

// src/systems/middlewares/initializers/worker-thread-health-schedule.ts
var WorkerThreadHealthScheduleSystem = class {
  action(context) {
    const { identity } = context.entity;
    context.scheduler.scheduleUpdate(
      {
        entityType: identity.entityType,
        entityUid: identity.model.uid
      },
      identity.model.healthCheckInterval || 5e3
    );
  }
  cleanup(context) {
    context.scheduler.removeSchedule();
    context.entity.instance.worker.terminate();
  }
};

// src/systems/middlewares/initializers/worker-thread-message-subscription.ts
var WorkerThreadMessageSubscriptionSystem = class {
  shouldRun(context) {
    return !!context.entity.instance.worker;
  }
  action(context) {
    const { worker } = context.entity.instance;
    worker.onmessage = (event) => {
      const data = {
        uid: event.data.messageType === "health" /* health */ ? "message-received-health" /* messageReceivedHealth */ : "message-received-data" /* messageReceivedData */,
        message: event.data
      };
      context.events.dispatchEvent(data, context.entity.myProxy);
      if (event.data.messageType === "data" /* data */) {
        context.entity.instance.status = 1 /* available */;
      }
      context.logger.debug(
        "[WORKER-RECEIVED] Message from worker",
        context.entity.myProxy,
        data.message.messageType,
        data.message.messageUid,
        data.message.workerUid
      );
    };
    worker.onerror = (error) => {
      const data = {
        uid: "message-received-health" /* messageReceivedHealth */,
        message: null,
        error
      };
      context.events.dispatchEvent(data);
      context.entity.instance.status = 3 /* error */;
    };
    worker.onmessageerror = (error) => {
      const data = {
        uid: "message-received-health" /* messageReceivedHealth */,
        message: null,
        messageError: error
      };
      context.events.dispatchEvent(data);
      context.entity.instance.status = 3 /* error */;
    };
  }
  cleanup(context) {
    context.events.clearSubscriptions();
  }
};

// src/systems/middlewares/initializers/worker-thread-health-subscription.ts
var WorkerThreadHealthSubscriptionSystem = class {
  action(context) {
    context.events.subscribeTo("message-received-health" /* messageReceivedHealth */);
  }
  cleanup(context) {
    context.events.unsubscribeFrom("message-received-health" /* messageReceivedHealth */);
  }
};

// src/systems/middlewares/updaters/worker-thread-health-request.ts
import { assertComponent } from "@awesome-ecs/core/utils";
var WorkerThreadHealthRequestSystem = class {
  maxHeartbeatsPending = 0;
  shouldRun(context) {
    const { lastHealthQuery } = context.entity.instance;
    if (!lastHealthQuery) {
      return true;
    }
    const passedMs = (/* @__PURE__ */ new Date()).getTime() - lastHealthQuery.getTime();
    if (passedMs > context.entity.identity.model.healthCheckInterval) {
      return true;
    }
    return false;
  }
  action(context) {
    assertComponent("worker-instance" /* workerInstance */, context.entity);
    const { entity } = context;
    const { instance } = entity;
    if (instance.status === 2 /* busy */) {
      context.logger.debug(
        "Worker is still busy, won't send heartbeat.",
        entity.identity.model.uid
      );
      return;
    }
    const randomUid = Math.random().toFixed(3);
    if (instance.heartbeats.size > this.maxHeartbeatsPending) {
      context.logger.warn(
        `Worker ${entity.identity.model.uid} has ${instance.heartbeats.size} pending heartbeat. Will deactivate!`
      );
      context.repository.removeEntity(context.entity.myProxy);
      const existingModel = context.entity.identity.model;
      const model = {
        type: existingModel.type,
        uid: `worker-${existingModel.type}-${randomUid}`,
        healthCheckInterval: existingModel.healthCheckInterval
      };
      context.repository.addEntity("worker-thread" /* workerThread */, model);
    } else {
      this.sendHeartbeatMessage(randomUid, entity);
      context.entity.instance.lastHealthQuery = /* @__PURE__ */ new Date();
    }
  }
  cleanup(context) {
    context.events.unsubscribeFrom("message-received-health" /* messageReceivedHealth */);
  }
  sendHeartbeatMessage(uid, entity) {
    const message = {
      messageUid: `worker-heartbeat-${uid}`,
      request: {
        heartbeatValue: uid
      },
      workerType: entity.identity.model.type,
      messageType: "health" /* health */
    };
    entity.instance.worker.postMessage(message);
    entity.instance.heartbeats.set(uid, true);
  }
};

// src/systems/middlewares/updaters/worker-thread-health-response.ts
import { assertComponent as assertComponent2 } from "@awesome-ecs/core/utils";
var WorkerThreadHealthResponseSystem = class {
  shouldRun(context) {
    return context.events.hasEvent("message-received-health" /* messageReceivedHealth */);
  }
  action(context) {
    assertComponent2("worker-instance" /* workerInstance */, context.entity);
    const { instance } = context.entity;
    const event = context.events.getEvent("message-received-health" /* messageReceivedHealth */);
    if (event.data.error) {
      throw new Error(`[WORKER-REPLY] ${event.data.error.message}`);
    }
    const { message } = event.data;
    context.logger.debug("[WORKER-HEALTH-REPLY]", context.entity.identity.model.uid, message);
    if (instance.status === 0 /* starting */) {
      instance.status = 1 /* available */;
    }
    instance.heartbeats.delete(message.data.heartbeatValue);
  }
  cleanup(context) {
    context.events.unsubscribeFrom("message-received-health" /* messageReceivedHealth */);
  }
};
export {
  WorkerThreadHealthRequestSystem,
  WorkerThreadHealthResponseSystem,
  WorkerThreadHealthScheduleSystem,
  WorkerThreadHealthSubscriptionSystem,
  WorkerThreadMessageSubscriptionSystem
};
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