@synerty/vortexjs
Version:
Custom observable data serialisation and routing based on Angular 2+
126 lines • 16.5 kB
JavaScript
import { VortexClientABC } from "./VortexClientABC";
import { dateStr } from "./UtilMisc";
import { NgLifeCycleEvents } from "../util/NgLifeCycleEvents";
import { takeUntil } from "rxjs/operators";
/** Payload Response
*
* This class is used to catch responses from a sent payload.
* If the remote end is going to send back a payload, with the same filt,
* this class catches this then either resolves or rejects the promise.
*
* If the response is not received within the timeout, the errback is called.
*
* ** The PayloadResponse in VortexJS Sends the Payload **
*
* Here is some example usage.
*
* ::
*
* payload = Payload(filt={"rapuiServerEcho":True})
* responsePromise = PayloadResponse(vortexService, payload)
* .then((payload) => console.log(`Received payload ${payload}`))
* .catch((err) => console.log(err));
*
*/
export class PayloadResponse {
payloadEnvelope;
timeoutSeconds;
resultCheck;
static RESPONSE_TIMEOUT_SECONDS = 30.0;
static messageIdKey = "PayloadResponse.messageId";
PROCESSING = "Processing";
// NO_ENDPOINT = "No Endpoint"
FAILED = "Failed";
SEND_FAILED = "Send Failed";
SUCCESS = "Success";
TIMED_OUT = "Timed Out";
_messageId = VortexClientABC.makeUuid();
_status = this.PROCESSING;
_lcEmitter = new NgLifeCycleEvents();
promise;
/** Constructor
* @param vortexService
* @param payloadEnvelope The PayloadEnvelope to send.
* @param timeoutSeconds The timeout to wait for a response - in seconds;
* @param resultCheck Should the result of the payload response be checked.
*/
constructor(vortexService, payloadEnvelope, timeoutSeconds = PayloadResponse.RESPONSE_TIMEOUT_SECONDS, resultCheck = true) {
this.payloadEnvelope = payloadEnvelope;
this.timeoutSeconds = timeoutSeconds;
this.resultCheck = resultCheck;
this.promise = new Promise((resolve, reject) => {
// Start the timer
let timer = null;
// Create the endpoint
this.payloadEnvelope.filt[PayloadResponse.messageIdKey] =
this._messageId;
let endpoint = vortexService.createEndpoint(this._lcEmitter, this.payloadEnvelope.filt);
let finish = (status) => {
this._status = status;
this._lcEmitter.onDestroyEvent.next();
if (timer != null) {
clearTimeout(timer);
timer = null;
}
};
let callFail = (status, msgArg = "") => {
let filtStr = JSON.stringify(this.payloadEnvelope.filt);
let msg = `${dateStr()} PayloadEndpoint ${status} Failed : ${msgArg}\n${filtStr}`;
console.log(msg);
finish(status);
reject(msgArg);
};
// Subscribe
endpoint.observable
.pipe(takeUntil(this._lcEmitter.onDestroyEvent))
.subscribe((payloadEnvelope) => {
let r = payloadEnvelope.result; // success is null or true
if (this.resultCheck && !(r == null || r === true)) {
callFail(this.FAILED, r.toString());
}
else {
finish(this.SUCCESS);
resolve(payloadEnvelope);
}
});
vortexService
.sendPayloadEnvelope(this.payloadEnvelope)
.then(() => {
timer = setTimeout(() => callFail(this.TIMED_OUT), timeoutSeconds * 1000);
})
.catch((err) => {
callFail(this.SEND_FAILED, err);
});
});
}
/**
* Attaches callbacks for the resolution and/or rejection of the Promise.
* @param onfulfilled The callback to execute when the Promise is resolved.
* @param onrejected The callback to execute when the Promise is rejected.
* @returns A Promise for the completion of which ever callback is executed.
*/
then(onfulfilled, onrejected = null) {
return this.promise.then(onfulfilled, onrejected);
}
/**
* Attaches a callback for only the rejection of the Promise.
* @param onrejected The callback to execute when the Promise is rejected.
* @returns A Promise for the completion of the callback.
*/
catch(onrejected) {
return this.promise.catch(onrejected);
}
/** Is Response Payload
*
* The PayloadResponse tags the payloads, so it expects a unique message back.
*
* @returns True if this payload has been tagged by a PayloadResponse class
*/
static isResponsePayloadEnvelope(payloadEnvelope) {
return payloadEnvelope.filt.hasOwnProperty(PayloadResponse.messageIdKey);
}
get status() {
return this._status;
}
}
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in seconds;\n     * @param resultCheck Should the result of the payload response be checked.\n     */\n    constructor(\n        vortexService: VortexService,\n        private payloadEnvelope: PayloadEnvelope,\n        private timeoutSeconds: number = PayloadResponse.RESPONSE_TIMEOUT_SECONDS,\n        private resultCheck: boolean = true,\n    ) {\n        this.promise = new Promise<PayloadEnvelope>((resolve, reject) => {\n            // Start the timer\n            let timer = null;\n\n            // Create the endpoint\n            this.payloadEnvelope.filt[PayloadResponse.messageIdKey] =\n                this._messageId;\n            let endpoint = vortexService.createEndpoint(\n                this._lcEmitter,\n                <IPayloadFilt>this.payloadEnvelope.filt,\n            );\n\n            let finish = (status) => {\n                this._status = status;\n                this._lcEmitter.onDestroyEvent.next();\n\n                if (timer != null) {\n                    clearTimeout(timer);\n                    timer = null;\n                }\n            };\n\n            let callFail = (status: string, msgArg = \"\") => {\n                let filtStr = JSON.stringify(this.payloadEnvelope.filt);\n                let msg = `${dateStr()} PayloadEndpoint ${status} Failed : ${msgArg}\\n${filtStr}`;\n                console.log(msg);\n\n                finish(status);\n                reject(msgArg);\n            };\n\n            // Subscribe\n            endpoint.observable\n                .pipe(takeUntil(this._lcEmitter.onDestroyEvent))\n                .subscribe((payloadEnvelope: PayloadEnvelope) => {\n                    let r = payloadEnvelope.result; // success is null or true\n                    if (this.resultCheck && !(r == null || r === true)) {\n                        callFail(this.FAILED, r.toString());\n                    } else {\n                        finish(this.SUCCESS);\n                        resolve(payloadEnvelope);\n                    }\n                });\n\n            vortexService\n                .sendPayloadEnvelope(this.payloadEnvelope)\n                .then(() => {\n                    timer = setTimeout(\n                        () => callFail(this.TIMED_OUT),\n                        timeoutSeconds * 1000,\n                    );\n                })\n                .catch((err) => {\n                    callFail(this.SEND_FAILED, err);\n                });\n        });\n    }\n\n    /**\n     * Attaches callbacks for the resolution and/or rejection of the Promise.\n     * @param onfulfilled The callback to execute when the Promise is resolved.\n     * @param onrejected The callback to execute when the Promise is rejected.\n     * @returns A Promise for the completion of which ever callback is executed.\n     */\n    then(onfulfilled, onrejected = null): Promise<PayloadEnvelope> {\n        return this.promise.then(onfulfilled, onrejected);\n    }\n\n    /**\n     * Attaches a callback for only the rejection of the Promise.\n     * @param onrejected The callback to execute when the Promise is rejected.\n     * @returns A Promise for the completion of the callback.\n     */\n    catch(onrejected): Promise<PayloadEnvelope> {\n        return this.promise.catch(onrejected);\n    }\n\n    /** Is Response Payload\n     *\n     * The PayloadResponse tags the payloads, so it expects a unique message back.\n     *\n     * @returns True if this payload has been tagged by a PayloadResponse class\n     */\n    static isResponsePayloadEnvelope(payloadEnvelope: PayloadEnvelope) {\n        return payloadEnvelope.filt.hasOwnProperty(\n            PayloadResponse.messageIdKey,\n        );\n    }\n\n    get status() {\n        return this._status;\n    }\n}\n"]}