import { AuthorizeResponse, StartTransactionResponse, StopTransactionReason, StopTransactionResponse } from '../../types/ocpp/Transaction';
-import { IncomingRequestCommand, Request, RequestCommand } from '../../types/ocpp/Requests';
+import { DiagnosticsStatus, IncomingRequestCommand, RequestCommand, SendParams } from '../../types/ocpp/Requests';
import { BootNotificationResponse } from '../../types/ocpp/Responses';
import { ChargePointErrorCode } from '../../types/ocpp/ChargePointErrorCode';
import { ChargePointStatus } from '../../types/ocpp/ChargePointStatus';
-import ChargingStation from '../ChargingStation';
+import type ChargingStation from '../ChargingStation';
import Constants from '../../utils/Constants';
import { ErrorType } from '../../types/ocpp/ErrorType';
+import { JsonType } from '../../types/JsonType';
import { MessageType } from '../../types/ocpp/MessageType';
-import OCPPError from '../OcppError';
-import OCPPResponseService from './OCPPResponseService';
+import { MeterValue } from '../../types/ocpp/MeterValues';
+import OCPPError from '../../exception/OCPPError';
+import type OCPPResponseService from './OCPPResponseService';
+import PerformanceStatistics from '../../performance/PerformanceStatistics';
+import Utils from '../../utils/Utils';
import logger from '../../utils/Logger';
export default abstract class OCPPRequestService {
- public chargingStation: ChargingStation;
- protected ocppResponseService: OCPPResponseService;
+ private static readonly instances: Map<string, OCPPRequestService> = new Map<string, OCPPRequestService>();
+ protected readonly chargingStation: ChargingStation;
+ private readonly ocppResponseService: OCPPResponseService;
- constructor(chargingStation: ChargingStation, ocppResponseService: OCPPResponseService) {
+ protected constructor(chargingStation: ChargingStation, ocppResponseService: OCPPResponseService) {
this.chargingStation = chargingStation;
this.ocppResponseService = ocppResponseService;
}
- public async sendMessage(messageId: string, commandParams: any, messageType: MessageType = MessageType.CALL_RESULT_MESSAGE,
- commandName: RequestCommand | IncomingRequestCommand): Promise<any> {
- // eslint-disable-next-line @typescript-eslint/no-this-alias
- const self = this;
- // Send a message through wsConnection
- return new Promise((resolve: (value?: any | PromiseLike<any>) => void, reject: (reason?: any) => void) => {
- let messageToSend: string;
- // Type of message
- switch (messageType) {
- // Request
- case MessageType.CALL_MESSAGE:
- // Build request
- this.chargingStation.requests[messageId] = [responseCallback, rejectCallback, commandParams] as Request;
- messageToSend = JSON.stringify([messageType, messageId, commandName, commandParams]);
- break;
- // Response
- case MessageType.CALL_RESULT_MESSAGE:
- // Build response
- messageToSend = JSON.stringify([messageType, messageId, commandParams]);
- break;
- // Error Message
- case MessageType.CALL_ERROR_MESSAGE:
- // Build Error Message
- messageToSend = JSON.stringify([messageType, messageId, commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : '', commandParams.details ? commandParams.details : {}]);
- break;
- }
- // Check if wsConnection opened and charging station registered
- if (this.chargingStation.isWebSocketOpen() && (this.chargingStation.isRegistered() || commandName === RequestCommand.BOOT_NOTIFICATION)) {
+ public static getInstance<T extends OCPPRequestService>(this: new (chargingStation: ChargingStation, ocppResponseService: OCPPResponseService) => T, chargingStation: ChargingStation, ocppResponseService: OCPPResponseService): T {
+ if (!OCPPRequestService.instances.has(chargingStation.id)) {
+ OCPPRequestService.instances.set(chargingStation.id, new this(chargingStation, ocppResponseService));
+ }
+ return OCPPRequestService.instances.get(chargingStation.id) as T;
+ }
+
+ public async sendResult(messageId: string, messagePayload: JsonType, commandName: IncomingRequestCommand): Promise<JsonType | OCPPError | string> {
+ try {
+ // Send result message
+ return await this.internalSendMessage(messageId, messagePayload, MessageType.CALL_RESULT_MESSAGE, commandName);
+ } catch (error) {
+ this.handleRequestError(commandName, error as Error);
+ }
+ }
+
+ public async sendError(messageId: string, ocppError: OCPPError, commandName: IncomingRequestCommand): Promise<JsonType | OCPPError | string> {
+ try {
+ // Send error message
+ return await this.internalSendMessage(messageId, ocppError, MessageType.CALL_ERROR_MESSAGE, commandName);
+ } catch (error) {
+ this.handleRequestError(commandName, error as Error);
+ }
+ }
+
+ protected async sendMessage(messageId: string, messagePayload: JsonType, commandName: RequestCommand, params: SendParams = {
+ skipBufferingOnError: false,
+ triggerMessage: false
+ }): Promise<JsonType | OCPPError | string> {
+ try {
+ return await this.internalSendMessage(messageId, messagePayload, MessageType.CALL_MESSAGE, commandName, params);
+ } catch (error) {
+ this.handleRequestError(commandName, error as Error);
+ }
+ }
+
+ private async internalSendMessage(messageId: string, messagePayload: JsonType | OCPPError, messageType: MessageType, commandName: RequestCommand | IncomingRequestCommand,
+ params: SendParams = {
+ skipBufferingOnError: false,
+ triggerMessage: false
+ }): Promise<JsonType | OCPPError | string> {
+ if ((this.chargingStation.isInUnknownState() && commandName === RequestCommand.BOOT_NOTIFICATION)
+ || (!this.chargingStation.getOcppStrictCompliance() && this.chargingStation.isInUnknownState())
+ || this.chargingStation.isInAcceptedState() || (this.chargingStation.isInPendingState() && params.triggerMessage)) {
+ // eslint-disable-next-line @typescript-eslint/no-this-alias
+ const self = this;
+ // Send a message through wsConnection
+ return Utils.promiseWithTimeout(new Promise((resolve, reject) => {
+ const messageToSend = this.buildMessageToSend(messageId, messagePayload, messageType, commandName, responseCallback, rejectCallback);
if (this.chargingStation.getEnableStatistics()) {
- this.chargingStation.statistics.addMessage(commandName, messageType);
+ this.chargingStation.performanceStatistics.addRequestStatistic(commandName, messageType);
+ }
+ // Check if wsConnection opened
+ if (this.chargingStation.isWebSocketConnectionOpened()) {
+ // Yes: Send Message
+ const beginId = PerformanceStatistics.beginMeasure(commandName);
+ // FIXME: Handle sending error
+ this.chargingStation.wsConnection.send(messageToSend);
+ PerformanceStatistics.endMeasure(commandName, beginId);
+ } else if (!params.skipBufferingOnError) {
+ // Buffer it
+ this.chargingStation.bufferMessage(messageToSend);
+ const ocppError = new OCPPError(ErrorType.GENERIC_ERROR, `WebSocket closed for buffered message id '${messageId}' with content '${messageToSend}'`, commandName, messagePayload?.details as JsonType ?? {});
+ if (messageType === MessageType.CALL_MESSAGE) {
+ // Reject it but keep the request in the cache
+ return reject(ocppError);
+ }
+ return rejectCallback(ocppError, false);
+ } else {
+ // Reject it
+ return rejectCallback(new OCPPError(ErrorType.GENERIC_ERROR, `WebSocket closed for non buffered message id '${messageId}' with content '${messageToSend}'`, commandName, messagePayload?.details as JsonType ?? {}), false);
+ }
+ // Response?
+ if (messageType !== MessageType.CALL_MESSAGE) {
+ // Yes: send Ok
+ return resolve(messagePayload);
}
- // Yes: Send Message
- this.chargingStation.wsConnection.send(messageToSend);
- } else if (commandName !== RequestCommand.BOOT_NOTIFICATION) {
- // Buffer it
- this.chargingStation.addToMessageQueue(messageToSend);
- // Reject it
- return rejectCallback(new OCPPError(commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : `WebSocket closed for message id '${messageId}' with content '${messageToSend}', message buffered`, commandParams.details ? commandParams.details : {}));
- }
- // Response?
- if (messageType === MessageType.CALL_RESULT_MESSAGE) {
- // Yes: send Ok
- resolve();
- } else if (messageType === MessageType.CALL_ERROR_MESSAGE) {
- // Send timeout
- setTimeout(() => rejectCallback(new OCPPError(commandParams.code ? commandParams.code : ErrorType.GENERIC_ERROR, commandParams.message ? commandParams.message : `Timeout for message id '${messageId}' with content '${messageToSend}'`, commandParams.details ? commandParams.details : {})), Constants.OCPP_ERROR_TIMEOUT);
- }
- /**
- * Function that will receive the request's response
- *
- * @param {Record<string, unknown> | string} payload
- * @param {Record<string, unknown>} requestPayload
- */
- async function responseCallback(payload: Record<string, unknown> | string, requestPayload: Record<string, unknown>): Promise<void> {
- if (self.chargingStation.getEnableStatistics()) {
- self.chargingStation.statistics.addMessage(commandName, messageType);
+ /**
+ * Function that will receive the request's response
+ *
+ * @param payload
+ * @param requestPayload
+ */
+ async function responseCallback(payload: JsonType | string, requestPayload: JsonType): Promise<void> {
+ if (self.chargingStation.getEnableStatistics()) {
+ self.chargingStation.performanceStatistics.addRequestStatistic(commandName, MessageType.CALL_RESULT_MESSAGE);
+ }
+ // Handle the request's response
+ try {
+ await self.ocppResponseService.handleResponse(commandName as RequestCommand, payload, requestPayload);
+ resolve(payload);
+ } catch (error) {
+ reject(error);
+ throw error;
+ } finally {
+ self.chargingStation.requests.delete(messageId);
+ }
}
- // Send the response
- await self.ocppResponseService.handleResponse(commandName as RequestCommand, payload, requestPayload);
- resolve(payload);
- }
- /**
- * Function that will receive the request's rejection
- *
- * @param {OCPPError} error
- */
- function rejectCallback(error: OCPPError): void {
- if (self.chargingStation.getEnableStatistics()) {
- self.chargingStation.statistics.addMessage(commandName, messageType);
+ /**
+ * Function that will receive the request's error response
+ *
+ * @param error
+ * @param requestStatistic
+ */
+ function rejectCallback(error: OCPPError, requestStatistic = true): void {
+ if (requestStatistic && self.chargingStation.getEnableStatistics()) {
+ self.chargingStation.performanceStatistics.addRequestStatistic(commandName, MessageType.CALL_ERROR_MESSAGE);
+ }
+ logger.error(`${self.chargingStation.logPrefix()} Error %j occurred when calling command %s with message data %j`, error, commandName, messagePayload);
+ self.chargingStation.requests.delete(messageId);
+ reject(error);
}
- logger.debug(`${self.chargingStation.logPrefix()} Error: %j occurred when calling command %s with parameters: %j`, error, commandName, commandParams);
- // Build Exception
- // eslint-disable-next-line no-empty-function
- self.chargingStation.requests[messageId] = [() => { }, () => { }, {}];
- // Send error
- reject(error);
- }
- });
+ }), Constants.OCPP_WEBSOCKET_TIMEOUT, new OCPPError(ErrorType.GENERIC_ERROR, `Timeout for message id '${messageId}'`, commandName, messagePayload?.details as JsonType ?? {}), () => {
+ messageType === MessageType.CALL_MESSAGE && this.chargingStation.requests.delete(messageId);
+ });
+ }
+ throw new OCPPError(ErrorType.SECURITY_ERROR, `Cannot send command ${commandName} payload when the charging station is in ${this.chargingStation.getRegistrationStatus()} state on the central server`, commandName);
+ }
+
+ private buildMessageToSend(messageId: string, messagePayload: JsonType | OCPPError, messageType: MessageType, commandName: RequestCommand | IncomingRequestCommand,
+ responseCallback: (payload: JsonType | string, requestPayload: JsonType) => Promise<void>,
+ rejectCallback: (error: OCPPError, requestStatistic?: boolean) => void): string {
+ let messageToSend: string;
+ // Type of message
+ switch (messageType) {
+ // Request
+ case MessageType.CALL_MESSAGE:
+ // Build request
+ this.chargingStation.requests.set(messageId, [responseCallback, rejectCallback, commandName, messagePayload]);
+ messageToSend = JSON.stringify([messageType, messageId, commandName, messagePayload]);
+ break;
+ // Response
+ case MessageType.CALL_RESULT_MESSAGE:
+ // Build response
+ messageToSend = JSON.stringify([messageType, messageId, messagePayload]);
+ break;
+ // Error Message
+ case MessageType.CALL_ERROR_MESSAGE:
+ // Build Error Message
+ messageToSend = JSON.stringify([messageType, messageId, messagePayload?.code ?? ErrorType.GENERIC_ERROR, messagePayload?.message ?? '', messagePayload?.details ?? {}]);
+ break;
+ }
+ return messageToSend;
}
- public handleRequestError(commandName: RequestCommand, error: Error): void {
- logger.error(this.chargingStation.logPrefix() + ' Send ' + commandName + ' error: %j', error);
+ private handleRequestError(commandName: RequestCommand | IncomingRequestCommand, error: Error): void {
+ logger.error(this.chargingStation.logPrefix() + ' Request command %s error: %j', commandName, error);
throw error;
}
- public abstract sendHeartbeat(): Promise<void>;
- public abstract sendBootNotification(chargePointModel: string, chargePointVendor: string, chargeBoxSerialNumber?: string, firmwareVersion?: string, chargePointSerialNumber?: string, iccid?: string, imsi?: string, meterSerialNumber?: string, meterType?: string): Promise<BootNotificationResponse>;
+ public abstract sendHeartbeat(params?: SendParams): Promise<void>;
+ public abstract sendBootNotification(chargePointModel: string, chargePointVendor: string, chargeBoxSerialNumber?: string, firmwareVersion?: string, chargePointSerialNumber?: string, iccid?: string, imsi?: string, meterSerialNumber?: string, meterType?: string, params?: SendParams): Promise<BootNotificationResponse>;
public abstract sendStatusNotification(connectorId: number, status: ChargePointStatus, errorCode?: ChargePointErrorCode): Promise<void>;
- public abstract sendAuthorize(idTag?: string): Promise<AuthorizeResponse>;
+ public abstract sendAuthorize(
connectorId: number, idTag?: string): Promise<AuthorizeResponse>;
public abstract sendStartTransaction(connectorId: number, idTag?: string): Promise<StartTransactionResponse>;
public abstract sendStopTransaction(transactionId: number, meterStop: number, idTag?: string, reason?: StopTransactionReason): Promise<StopTransactionResponse>;
- public abstract sendMeterValues(connectorId: number, transactionId: number, interval: number, self: OCPPRequestService): Promise<void>;
- public abstract sendError(messageId: string, error: OCPPError, commandName: RequestCommand | IncomingRequestCommand): Promise<unknown>;
+ public abstract sendMeterValues(connectorId: number, transactionId: number, interval: number): Promise<void>;
+ public abstract sendTransactionBeginMeterValues(connectorId: number, transactionId: number, beginMeterValue: MeterValue): Promise<void>;
+ public abstract sendTransactionEndMeterValues(connectorId: number, transactionId: number, endMeterValue: MeterValue): Promise<void>;
+ public abstract sendDiagnosticsStatusNotification(diagnosticsStatus: DiagnosticsStatus): Promise<void>;
}
repositories / e-mobility-charging-stations-simulator.git / blobdiff