@awesome-ecs/workers/dist/systems/index.cjs.map

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

{"version":3,"sources":["../../src/systems/index.ts","../../src/systems/middlewares/initializers/worker-thread-health-schedule.ts","../../src/systems/middlewares/initializers/worker-thread-message-subscription.ts","../../src/systems/middlewares/initializers/worker-thread-health-subscription.ts","../../src/systems/middlewares/updaters/worker-thread-health-request.ts","../../src/systems/middlewares/updaters/worker-thread-health-response.ts"],"sourcesContent":["export * from './middlewares/initializers/worker-thread-health-schedule';\nexport * from './middlewares/initializers/worker-thread-message-subscription';\nexport * from './middlewares/initializers/worker-thread-health-subscription';\nexport * from './middlewares/updaters/worker-thread-health-request';\nexport * from './middlewares/updaters/worker-thread-health-response';\n","import { ISystemMiddleware, ISystemContext } from '@awesome-ecs/abstract/systems';\nimport { WorkerThreadEntity } from '../../../entities/worker-thread';\n\n// @injectable\nexport class WorkerThreadHealthScheduleSystem implements ISystemMiddleware<WorkerThreadEntity> {\n  action(context: ISystemContext<WorkerThreadEntity>): void {\n    const { identity } = context.entity;\n\n    context.scheduler.scheduleUpdate(\n      {\n        entityType: identity.entityType,\n        entityUid: identity.model.uid\n      },\n      identity.model.healthCheckInterval || 5000\n    );\n  }\n\n  cleanup(context: ISystemContext<WorkerThreadEntity>): void {\n    context.scheduler.removeSchedule();\n    context.entity.instance.worker.terminate();\n  }\n}\n","import { ISystemMiddleware, ISystemContext } from '@awesome-ecs/abstract/systems';\nimport { WorkerThreadEventType } from '../../../abstract/events/event-type';\nimport { WorkerThreadEventMessageResponseData } from '../../../abstract/events/message';\nimport { WorkerMessageType, WorkerResponseMessage } from '../../../abstract/worker-message';\nimport { WorkerStatus } from '../../../components/worker-instance';\nimport { WorkerThreadEntity } from '../../../entities/worker-thread';\n\n// @injectable\nexport class WorkerThreadMessageSubscriptionSystem\n  implements ISystemMiddleware<WorkerThreadEntity>\n{\n  shouldRun(context: ISystemContext<WorkerThreadEntity>): boolean {\n    return !!context.entity.instance.worker;\n  }\n\n  action(context: ISystemContext<WorkerThreadEntity>): void {\n    const { worker } = context.entity.instance;\n\n    worker.onmessage = (event: MessageEvent<WorkerResponseMessage<any>>) => {\n      const data: WorkerThreadEventMessageResponseData<any> = {\n        uid:\n          event.data.messageType === WorkerMessageType.health\n            ? WorkerThreadEventType.messageReceivedHealth\n            : WorkerThreadEventType.messageReceivedData,\n        message: event.data\n      };\n\n      // dispatch event to SELF so it can be processed by other middleware on next tick\n      context.events.dispatchEvent(data, context.entity.myProxy);\n\n      if (event.data.messageType === WorkerMessageType.data) {\n        context.entity.instance.status = WorkerStatus.available;\n      }\n\n      context.logger.debug(\n        '[WORKER-RECEIVED] Message from worker',\n        context.entity.myProxy,\n        data.message.messageType,\n        data.message.messageUid,\n        data.message.workerUid\n      );\n    };\n\n    worker.onerror = (error: ErrorEvent) => {\n      const data: WorkerThreadEventMessageResponseData<any> = {\n        uid: WorkerThreadEventType.messageReceivedHealth,\n        message: null,\n        error\n      };\n\n      context.events.dispatchEvent(data);\n      context.entity.instance.status = WorkerStatus.error;\n    };\n\n    worker.onmessageerror = (error: MessageEvent) => {\n      const data: WorkerThreadEventMessageResponseData<any> = {\n        uid: WorkerThreadEventType.messageReceivedHealth,\n        message: null,\n        messageError: error\n      };\n\n      context.events.dispatchEvent(data);\n      context.entity.instance.status = WorkerStatus.error;\n    };\n  }\n\n  cleanup(context: ISystemContext<WorkerThreadEntity>): void {\n    context.events.clearSubscriptions();\n  }\n}\n","import { ISystemMiddleware, ISystemContext } from '@awesome-ecs/abstract/systems';\nimport { WorkerThreadEventType } from '../../../abstract/events/event-type';\nimport { WorkerThreadEntity } from '../../../entities/worker-thread';\n\n// @injectable\nexport class WorkerThreadHealthSubscriptionSystem implements ISystemMiddleware<WorkerThreadEntity> {\n  action(context: ISystemContext<WorkerThreadEntity>): void {\n    context.events.subscribeTo(WorkerThreadEventType.messageReceivedHealth);\n  }\n\n  cleanup(context: ISystemContext<WorkerThreadEntity>): void {\n    context.events.unsubscribeFrom(WorkerThreadEventType.messageReceivedHealth);\n  }\n}\n","import { ISystemMiddleware, ISystemContext } from '@awesome-ecs/abstract/systems';\nimport { assertComponent } from '@awesome-ecs/core/utils';\nimport { WorkerThreadEventType } from '../../../abstract/events/event-type';\nimport { WorkerComponentType } from '../../../abstract/types/component-type';\nimport { WorkerEntityType } from '../../../abstract/types/entity-type';\nimport { WorkerThreadHealthRequest } from '../../../abstract/worker-health';\nimport { WorkerMessageType, WorkerRequestMessage } from '../../../abstract/worker-message';\nimport { WorkerStatus } from '../../../components/worker-instance';\nimport { WorkerThreadEntity, WorkerThreadModel } from '../../../entities/worker-thread';\n\n// @injectable\nexport class WorkerThreadHealthRequestSystem implements ISystemMiddleware<WorkerThreadEntity> {\n  private maxHeartbeatsPending = 0;\n\n  shouldRun(context: ISystemContext<WorkerThreadEntity>): boolean {\n    const { lastHealthQuery } = context.entity.instance;\n\n    if (!lastHealthQuery) {\n      return true;\n    }\n\n    const passedMs = new Date().getTime() - lastHealthQuery.getTime();\n\n    if (passedMs > context.entity.identity.model.healthCheckInterval) {\n      return true;\n    }\n\n    return false;\n  }\n\n  action(context: ISystemContext<WorkerThreadEntity>): void {\n    assertComponent(WorkerComponentType.workerInstance, context.entity);\n\n    const { entity } = context;\n    const { instance } = entity;\n\n    if (instance.status === WorkerStatus.busy) {\n      context.logger.debug(\n        \"Worker is still busy, won't send heartbeat.\",\n        entity.identity.model.uid\n      );\n      return;\n    }\n\n    const randomUid = Math.random().toFixed(3);\n\n    if (instance.heartbeats.size > this.maxHeartbeatsPending) {\n      context.logger.warn(\n        `Worker ${entity.identity.model.uid} has ${instance.heartbeats.size} pending heartbeat. Will deactivate!`\n      );\n\n      // remove current unresponsive worker\n      context.repository.removeEntity(context.entity.myProxy);\n\n      const existingModel = context.entity.identity.model;\n\n      // register new worker\n      const model: WorkerThreadModel = {\n        type: existingModel.type,\n        uid: `worker-${existingModel.type}-${randomUid}`,\n        healthCheckInterval: existingModel.healthCheckInterval\n      };\n\n      context.repository.addEntity(WorkerEntityType.workerThread, model);\n    } else {\n      this.sendHeartbeatMessage(randomUid, entity);\n      context.entity.instance.lastHealthQuery = new Date();\n    }\n  }\n\n  cleanup(context: ISystemContext<WorkerThreadEntity>): void {\n    context.events.unsubscribeFrom(WorkerThreadEventType.messageReceivedHealth);\n  }\n\n  private sendHeartbeatMessage(uid: string, entity: Readonly<WorkerThreadEntity>) {\n    const message: WorkerRequestMessage<WorkerThreadHealthRequest> = {\n      messageUid: `worker-heartbeat-${uid}`,\n      request: {\n        heartbeatValue: uid\n      },\n      workerType: entity.identity.model.type,\n      messageType: WorkerMessageType.health\n    };\n\n    entity.instance.worker.postMessage(message);\n    entity.instance.heartbeats.set(uid, true);\n  }\n}\n","import { ISystemMiddleware, ISystemContext } from '@awesome-ecs/abstract/systems';\nimport { assertComponent } from '@awesome-ecs/core/utils';\nimport { WorkerThreadEventType } from '../../../abstract/events/event-type';\nimport { WorkerThreadEventMessageResponseData } from '../../../abstract/events/message';\nimport { WorkerComponentType } from '../../../abstract/types/component-type';\nimport { WorkerThreadHealthResponse } from '../../../abstract/worker-health';\nimport { WorkerStatus } from '../../../components/worker-instance';\nimport { WorkerThreadEntity } from '../../../entities/worker-thread';\n\n// @injectable\nexport class WorkerThreadHealthResponseSystem implements ISystemMiddleware<WorkerThreadEntity> {\n  shouldRun(context: ISystemContext<WorkerThreadEntity>): boolean {\n    return context.events.hasEvent(WorkerThreadEventType.messageReceivedHealth);\n  }\n\n  action(context: ISystemContext<WorkerThreadEntity>): void {\n    assertComponent(WorkerComponentType.workerInstance, context.entity);\n\n    const { instance } = context.entity;\n    const event = context.events.getEvent<\n      WorkerThreadEventMessageResponseData<WorkerThreadHealthResponse>\n    >(WorkerThreadEventType.messageReceivedHealth);\n\n    if (event.data.error) {\n      throw new Error(`[WORKER-REPLY] ${event.data.error.message}`);\n    }\n\n    const { message } = event.data;\n\n    context.logger.debug('[WORKER-HEALTH-REPLY]', context.entity.identity.model.uid, message);\n\n    if (instance.status === WorkerStatus.starting) {\n      instance.status = WorkerStatus.available;\n    }\n\n    instance.heartbeats.delete(message.data.heartbeatValue);\n  }\n\n  cleanup(context: ISystemContext<WorkerThreadEntity>): void {\n    context.events.unsubscribeFrom(WorkerThreadEventType.messageReceivedHealth);\n  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