102 lines
3.8 KiB
Java
102 lines
3.8 KiB
Java
/*
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* The MIT License
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* Copyright © 2014-2019 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.commander.messagingservice;
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import com.iluwatar.commander.Service;
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import com.iluwatar.commander.exceptions.DatabaseUnavailableException;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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/**
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* The MessagingService is used to send messages to user regarding their order and payment status.
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* In case an error is encountered in payment and this service is found to be unavailable, the order
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* is added to the {@link com.iluwatar.commander.employeehandle.EmployeeDatabase}.
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*/
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public class MessagingService extends Service {
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private static final Logger LOGGER = LoggerFactory.getLogger(MessagingService.class);
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enum MessageToSend {
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PAYMENT_FAIL, PAYMENT_TRYING, PAYMENT_SUCCESSFUL
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}
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class MessageRequest {
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String reqId;
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MessageToSend msg;
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MessageRequest(String reqId, MessageToSend msg) {
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this.reqId = reqId;
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this.msg = msg;
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}
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}
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public MessagingService(MessagingDatabase db, Exception... exc) {
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super(db, exc);
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}
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/**
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* Public method which will receive request from {@link com.iluwatar.commander.Commander}.
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*/
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public String receiveRequest(Object... parameters) throws DatabaseUnavailableException {
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var messageToSend = (int) parameters[0];
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var id = generateId();
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MessageToSend msg;
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if (messageToSend == 0) {
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msg = MessageToSend.PAYMENT_FAIL;
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} else if (messageToSend == 1) {
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msg = MessageToSend.PAYMENT_TRYING;
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} else { //messageToSend == 2
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msg = MessageToSend.PAYMENT_SUCCESSFUL;
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}
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var req = new MessageRequest(id, msg);
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return updateDb(req);
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}
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protected String updateDb(Object... parameters) throws DatabaseUnavailableException {
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var req = (MessageRequest) parameters[0];
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if (this.database.get(req.reqId) == null) { //idempotence, in case db fails here
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database.add(req); //if successful:
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LOGGER.info(sendMessage(req.msg));
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return req.reqId;
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}
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return null;
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}
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String sendMessage(MessageToSend m) {
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if (m.equals(MessageToSend.PAYMENT_SUCCESSFUL)) {
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return "Msg: Your order has been placed and paid for successfully!"
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+ " Thank you for shopping with us!";
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} else if (m.equals(MessageToSend.PAYMENT_TRYING)) {
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return "Msg: There was an error in your payment process,"
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+ " we are working on it and will return back to you shortly."
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+ " Meanwhile, your order has been placed and will be shipped.";
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} else {
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return "Msg: There was an error in your payment process."
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+ " Your order is placed and has been converted to COD."
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+ " Please reach us on CUSTOMER-CARE-NUBER in case of any queries."
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+ " Thank you for shopping with us!";
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}
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}
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}
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