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spike: introduce generic workload interface
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,109 @@ | ||
| // import { BrokerClientRequestWorkload } from '../broker-workload/clientRequests'; | ||
| // import { BrokerWorkload } from '../broker-workload/websocketRequests'; | ||
|
|
||
| export enum WorkloadType { | ||
| remoteServer = 'remoteServer', | ||
| localClient = 'localClient', | ||
| } | ||
|
|
||
| export interface RemoteServerWorkloadParams { | ||
| connectionIdentifier: string; | ||
| options: any; | ||
| websocketConnectionHandler: any; | ||
| } | ||
|
|
||
| export interface LocalClientWorkloadParams { | ||
| req: any; | ||
| res: any; | ||
| options: any; | ||
| } | ||
|
|
||
| export interface RemoteServerWorkloadRuntimeParams { | ||
| payload: any; | ||
| websocketHandler: any; | ||
| } | ||
| export interface LocalClientWorkloadRuntimeParams { | ||
| makeRequestOverHttp?: boolean; | ||
| } | ||
| // export type WorkloadRuntimeParamType<T extends WorkloadType> = | ||
| // T extends WorkloadType.remoteServer | ||
| // ? RemoteServerWorkloadRuntimeParams | ||
| // : LocalClientWorkloadRuntimeParams; | ||
| type WorkloadRuntimeParamType< | ||
| T extends WorkloadType.localClient | WorkloadType.remoteServer, | ||
| > = T extends WorkloadType.remoteServer | ||
| ? RemoteServerWorkloadRuntimeParams | ||
| : T extends WorkloadType.localClient | ||
| ? LocalClientWorkloadRuntimeParams | ||
| : never; | ||
| export type WorkloadRuntimeReturnType = Promise<void> | Promise<any>; | ||
|
|
||
| interface WorkloadModule { | ||
| default: new ( | ||
| connectionIdentifier: string, | ||
| options: any, | ||
| websocketConnectionHandler: any, | ||
| ) => Workload<WorkloadType.remoteServer>; | ||
| } | ||
|
|
||
| export abstract class Workload< | ||
| T extends WorkloadType.localClient | WorkloadType.remoteServer, | ||
| > { | ||
| type: WorkloadType; | ||
| name: string; | ||
|
|
||
| constructor(name: string, type: WorkloadType) { | ||
| this.name = name; | ||
| this.type = type; | ||
| } | ||
| abstract handler( | ||
| data: WorkloadRuntimeParamType<T>, | ||
| ): WorkloadRuntimeReturnType; | ||
|
|
||
| // abstract handler(makeRequestOverHttp: boolean): void; | ||
| // abstract handler(payload: any, websocketHandler: any): void; | ||
|
|
||
| private static async instantiateRemoteServerWorkload( | ||
| name: string, | ||
| path: string, | ||
| params: RemoteServerWorkloadParams, | ||
| ): Promise<Workload<WorkloadType.remoteServer>> { | ||
| const { connectionIdentifier, options, websocketConnectionHandler } = | ||
| params; | ||
| const importedModule = (await import(path)) as WorkloadModule; | ||
| const WorkloadClass = importedModule[name]; | ||
| return new WorkloadClass( | ||
| connectionIdentifier, | ||
| options, | ||
| websocketConnectionHandler, | ||
| ); | ||
| } | ||
| private static async instantiateLocalClientWorkload( | ||
| name: string, | ||
| path: string, | ||
| params: LocalClientWorkloadParams, | ||
| ): Promise<Workload<WorkloadType.localClient>> { | ||
| const { req, res, options } = params; | ||
| const importedModule = (await import(path)) as WorkloadModule; | ||
| const WorkloadClass = importedModule[name]; | ||
| return new WorkloadClass(req, res, options); | ||
| } | ||
|
|
||
| static async instantiate( | ||
| name: string, | ||
| path: string, | ||
| type: WorkloadType.localClient | WorkloadType.remoteServer, | ||
| params, | ||
| ): Promise< | ||
| Workload<WorkloadType.localClient> | Workload<WorkloadType.remoteServer> | ||
| > { | ||
| switch (type) { | ||
| case WorkloadType.remoteServer: | ||
| return await this.instantiateRemoteServerWorkload(name, path, params); | ||
| case WorkloadType.localClient: | ||
| return await this.instantiateLocalClientWorkload(name, path, params); | ||
| default: | ||
| throw new Error(`Error loading workload - unknown type ${type}`); | ||
| } | ||
| } | ||
| } |