- 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)) {
- if (this.chargingStation.getEnableStatistics()) {
- this.chargingStation.statistics.addMessage(commandName, messageType);
- }
- // 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 payload
- * @param 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);
- }
- // Send the response
- await self.ocppResponseService.handleResponse(commandName as RequestCommand, payload, requestPayload);
- resolve(payload);
- }
-
- /**
- * Function that will receive the request's rejection
- *
- * @param error
- */
- function rejectCallback(error: OCPPError): void {
- if (self.chargingStation.getEnableStatistics()) {
- self.chargingStation.statistics.addMessage(commandName, messageType);
+ 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<ResponseType> {
+ 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<ResponseType> {
+ 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<ResponseType> {
+ try {
+ return await this.internalSendMessage(
+ messageId,
+ messagePayload,
+ MessageType.CALL_MESSAGE,
+ commandName,
+ params
+ );
+ } catch (error) {
+ this.handleRequestError(commandName, error as Error, { throwError: false });
+ }
+ }
+
+ private async internalSendMessage(
+ messageId: string,
+ messagePayload: JsonType | OCPPError,
+ messageType: MessageType,
+ commandName?: RequestCommand | IncomingRequestCommand,
+ params: SendParams = {
+ skipBufferingOnError: false,
+ triggerMessage: false,
+ }
+ ): Promise<ResponseType> {
+ 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.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);
+ }
+
+ /**
+ * 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);
+ }
+ }
+
+ /**
+ * 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(
+ `${self.chargingStation.logPrefix()} Error %j occurred when calling command %s with message data %j`,
+ error,
+ commandName,
+ messagePayload
+ );
+ self.chargingStation.requests.delete(messageId);
+ reject(error);
+ }
+ }),
+ Constants.OCPP_WEBSOCKET_TIMEOUT,
+ new OCPPError(
+ ErrorType.GENERIC_ERROR,
+ `Timeout for message id '${messageId}'`,
+ commandName,
+ (messagePayload?.details as JsonType) ?? {}
+ ),
+ () => {
+ messageType === MessageType.CALL_MESSAGE &&
+ this.chargingStation.requests.delete(messageId);