1 package at.ac.tuwien.sbc.valesriegler.xvsm;
3 import at.ac.tuwien.sbc.valesriegler.common.OrderId;
4 import at.ac.tuwien.sbc.valesriegler.common.Util;
5 import at.ac.tuwien.sbc.valesriegler.types.*;
6 import at.ac.tuwien.sbc.valesriegler.xvsm.spacehelpers.SpaceAction;
7 import at.ac.tuwien.sbc.valesriegler.xvsm.spacehelpers.SpaceListener;
8 import org.mozartspaces.core.MzsConstants.RequestTimeout;
9 import org.mozartspaces.core.MzsCoreException;
10 import org.mozartspaces.core.TransactionReference;
11 import org.slf4j.Logger;
12 import org.slf4j.LoggerFactory;
14 import java.io.Serializable;
15 import java.util.Arrays;
16 import java.util.List;
18 public class WaiterXVSM extends AbstractXVSMConnector {
19 private static final Logger log = LoggerFactory.getLogger(WaiterXVSM.class);
20 private final int waiterId;
22 public WaiterXVSM(int waiterId, int port) {
25 this.waiterId = waiterId;
27 freeTablesContainer = useContainer(Util.FREE_TABLES);
28 assignTableContainer = useContainer(Util.ASSIGN_TABLE);
29 takeOrderContainer = useContainer(Util.TAKE_ORDER);
30 orderTakenContainer = useContainer(Util.ORDER_TAKEN);
31 deliveryOrderTakenContainer = useContainer(Util.DELIVERY_ORDER_TAKEN);
32 preparePizzasContainer = useContainer(Util.PREPARE_PIZZAS);
33 prepareDeliveryPizzasContainer = useContainer(Util.PREPARE_DELIVERY_PIZZAS);
34 orderDeliveredContainer = useContainer(Util.ORDER_COMPLETE);
35 preparedPizzasContainer = useContainer(Util.DELIVER_PIZZAS);
36 paymentRequestContainer = useContainer(Util.PAYMENT_REQUEST);
37 paymentDoneContainer = useContainer(Util.PAYMENT_DONE);
38 tableAssignedContainer = useContainer(Util.TABLE_ASSIGNED);
39 pizzeriaInfoContainer = useContainer(Util.PIZZERIA_INFO);
40 phoneCallsContainer = useContainer(Util.PHONE_CALLS);
41 preparedDeliveryPizzasContainer = useContainer(Util.DELIVER_DELIVERY_PIZZAS);
42 deliverDeliveryOrderContainer = useContainer(Util.DELIVER_DELIVERY_ORDER);
43 pizzeriaGroupContainer = useContainer(Util.PIZZERIA_GROUP);
44 pizzeriaTableContainer = useContainer(Util.PIZZERIA_TABLE);
45 pizzeriaDeliveryContainer = useContainer(Util.PIZZERIA_DELIVERY);
48 public void listenForPhoneOrders() {
49 getDefaultBuilder().setCref(phoneCallsContainer).setLookaround(true).setSpaceAction(new SpaceAction() {
51 public void onEntriesWritten(List<? extends Serializable> entries) throws Exception {
52 final List<DeliveryGroupData> phoneOrders = castEntries(entries);
54 // if(inNotification.get()) Collections.shuffle(phoneOrders);
56 for (DeliveryGroupData phoneOrder : phoneOrders) {
57 final int id = phoneOrder.getId();
58 final DeliveryGroupData template = new DeliveryGroupData(id);
59 final String errorMsg = String.format("There was phone call with id %d. Another waiter already responded!", id);
61 final TransactionReference tx = getDefaultTransaction();
63 // Get the the delete lock so that only one waiter can answer this particular phone call
64 takeMatchingEntity(template, phoneCallsContainer, tx, RequestTimeout.DEFAULT, errorMsg);
66 final DeliveryGroupData group = takeMatchingEntity(template, pizzeriaDeliveryContainer, tx, RequestTimeout.INFINITE, errorMsg);
67 group.setWaiterIdOfOrder(WaiterXVSM.this.waiterId);
68 final Order order = group.getOrder();
69 group.setDeliveryStatus(DeliveryStatus.ORDERED);
71 updatePizzeriaOrderNumber(order, tx);
73 // send the order as a whole to the space
74 final List<DeliveryGroupData> groupsWhoHaveOrdered = Arrays.asList(group);
75 sendItemsToContainer(groupsWhoHaveOrdered,
76 deliveryOrderTakenContainer, RequestTimeout.ZERO, tx);
77 sendItemsToContainer(groupsWhoHaveOrdered,
78 pizzeriaDeliveryContainer, RequestTimeout.ZERO, tx);
79 sendItemsToContainer(order.getOrderedPizzas(),
80 prepareDeliveryPizzasContainer, RequestTimeout.ZERO, tx);
81 capi.commitTransaction(tx);
83 log.info("Waiter has taken a phone delivery call!");
84 } catch (Exception e) {
89 }).createSpaceListenerImpl();
92 public void listenForFreeTable() {
93 SpaceListener listener = getDefaultBuilder().setCref(freeTablesContainer).setSpaceAction(new SpaceAction() {
96 public void onEntriesWritten(List<? extends Serializable> entries) throws Exception {
98 List<Table> tables = castEntries(entries);
100 for (Table table : tables) {
102 TransactionReference tx = getDefaultTransaction();
104 // Acquire a lock for the free table in the
105 // FreeTableContainer
106 int id = table.getId();
108 Table tableTemplate = new Table(id);
110 Table lockedFreeTable = takeMatchingEntity(tableTemplate,
111 freeTablesContainer, tx, RequestTimeout.DEFAULT,
112 String.format("There was no free table found with id %d", id));
113 takeMatchingEntityIfItExists(tableTemplate, pizzeriaTableContainer, tx, RequestTimeout.DEFAULT);
115 GroupData groupTemplate = new GroupData();
116 GroupData lockedGroup = takeMatchingEntity(groupTemplate,
117 assignTableContainer, tx, RequestTimeout.DEFAULT,
118 "There is no group waiting for a table at the moment");
119 takeMatchingEntityIfItExists(lockedGroup, pizzeriaGroupContainer, tx, RequestTimeout.DEFAULT);
121 assignGroupToTable(lockedGroup, lockedFreeTable, tx);
122 } catch (Exception e) {
123 // log.info(e.getMessage());
127 }).createSpaceListenerImpl();
131 public void listenForNewGuests() {
132 SpaceListener listener = getDefaultBuilder().setLookaround(true).setCref(assignTableContainer).setSpaceAction(new SpaceAction() {
135 public void onEntriesWritten(List<? extends Serializable> entries)
137 log.info("New guest groups have arrived");
139 List<GroupData> groups = castEntries(entries);
141 for (GroupData group : groups) {
143 TransactionReference tx = getDefaultTransaction();
145 // Acquire a lock for the group in the
146 // AssignTableContainer
147 String groupNotFound = String.format("Group with id %d was already assigned a table by another waiter!", group.getId());
150 final GroupData templateGroup = new GroupData(group.getId());
151 GroupData lockedGroup = takeMatchingEntity(
153 assignTableContainer, tx,
154 RequestTimeout.DEFAULT, groupNotFound);
155 takeMatchingEntityIfItExists(templateGroup, pizzeriaGroupContainer, tx, RequestTimeout.DEFAULT);
156 // Acquire a lock for one free table in the
158 String noFreeTable = String.format("No free table for group with id %d could be found", group.getId());
159 final Table freeTable = new Table(null);
160 freeTable.setFree(true);
161 Table lockedFreeTable = takeMatchingEntity(freeTable, freeTablesContainer, tx, RequestTimeout.DEFAULT,
163 takeMatchingEntityIfItExists(lockedFreeTable, pizzeriaTableContainer, tx, RequestTimeout.DEFAULT);
165 assignGroupToTable(lockedGroup, lockedFreeTable, tx);
166 } catch (Exception e) {
167 // log.info(e.getMessage());
171 }).createSpaceListenerImpl();
174 public void listenForPaymentRequest() {
175 SpaceListener paymentListener = getDefaultBuilder().setCref(paymentRequestContainer).setSpaceAction(new SpaceAction() {
178 public void onEntriesWritten(List<? extends Serializable> entries)
181 List<GroupData> groups = castEntries(entries);
183 for (GroupData groupData : groups) {
184 TransactionReference tx = getDefaultTransaction();
185 GroupData entity = new GroupData(groupData.getId());
186 entity.setState(GroupState.PAY);
188 // Acquire the lock so that another waiter can't do the same
190 String paymentRequestTakenByOtherWaiter = String.format(
191 "The payment request for group %d was already taken by an other waiter!",
194 takeMatchingEntity(entity, paymentRequestContainer, tx, RequestTimeout.DEFAULT, paymentRequestTakenByOtherWaiter);
195 GroupData group = takeMatchingEntity(entity, pizzeriaGroupContainer, tx, RequestTimeout.DEFAULT, "Cannot get paying group!");
196 group.setPayingWaiter(waiterId);
197 group.setState(GroupState.GONE);
199 final Table tableTemplate = new Table(null);
200 tableTemplate.setGroupId(group.getId());
201 final Table table = takeMatchingEntity(tableTemplate, pizzeriaTableContainer, tx, RequestTimeout.DEFAULT, "Table was not found!");
202 table.setGroupId(-1);
203 final List<Table> tables = Arrays.asList(table);
204 sendItemsToContainer(tables, pizzeriaTableContainer, RequestTimeout.DEFAULT, tx);
205 sendItemsToContainer(tables, freeTablesContainer, RequestTimeout.DEFAULT, tx);
207 final List<GroupData> groupsPayed = Arrays.asList(group);
208 sendItemsToContainer(groupsPayed, paymentDoneContainer, RequestTimeout.DEFAULT, tx);
209 sendItemsToContainer(groupsPayed, pizzeriaGroupContainer, RequestTimeout.DEFAULT, tx);
211 capi.commitTransaction(tx);
212 } catch (Exception e) {
213 log.info(e.getMessage());
217 }).createSpaceListenerImpl();
220 public void listenForOrderRequests() {
221 getDefaultBuilder().setCref(takeOrderContainer).setSpaceAction(new SpaceAction() {
224 public void onEntriesWritten(List<? extends Serializable> entries)
227 List<GroupData> groups = castEntries(entries);
229 for (GroupData groupData : groups) {
231 TransactionReference tx = getDefaultTransaction();
232 GroupData entity = new GroupData(groupData.getId());
233 entity.setState(GroupState.SITTING);
236 // Acquire the lock so that another waiter can't do the same thing!
237 String orderTakenByOtherWaiter = String.format(
238 "The order for group %d was already taken by an other waiter!",
240 takeMatchingEntity(entity, takeOrderContainer, tx, RequestTimeout.DEFAULT, orderTakenByOtherWaiter);
241 GroupData group = takeMatchingEntityIfItExists(entity, pizzeriaGroupContainer, tx, RequestTimeout.INFINITE);
243 group.setOrderWaiter(waiterId);
244 group.setState(GroupState.ORDERED);
245 Order order = group.getOrder();
246 order.setStatus(OrderStatus.ORDERED);
248 /* get the id of the last order of the pizzeria and set the order accordingly and
250 updatePizzeriaOrderNumber(order, tx);
252 // send the order as a whole to the space
253 final List<GroupData> groupsWhoHaveOrdered = Arrays.asList(group);
254 sendItemsToContainer(groupsWhoHaveOrdered,
255 orderTakenContainer, RequestTimeout.ZERO, tx);
256 sendItemsToContainer(groupsWhoHaveOrdered,
257 pizzeriaGroupContainer, RequestTimeout.ZERO, tx);
258 sendItemsToContainer(order.getOrderedPizzas(),
259 preparePizzasContainer, RequestTimeout.ZERO, tx);
260 capi.commitTransaction(tx);
262 log.info("Waiter has taken order from group {}",
264 } catch (Exception e) {
265 // log.info(e.getMessage());
269 }).createSpaceListenerImpl();
272 public void listenForPreparedPizzas() {
274 * A waiter gets informed when a new pizza is complete. He takes the
275 * orderId of the pizza and looks up the corresponding order from which
276 * he gets the number of necessary pizzas of the order. He then tries to
277 * fetch all pizzas with the corresponding orderId and compares the
278 * number of those pizzas with the number of necessary pizzas. If all
279 * pizzas of an order are complete he then delivers them!
281 getDefaultBuilder().setLookaround(true).setCref(preparedPizzasContainer).setSpaceAction(new SpaceAction() {
284 public void onEntriesWritten(List<? extends Serializable> entries)
286 log.info("NEW PIZZAS ARRived");
288 List<Pizza> pizzas = castEntries(entries);
290 for (Pizza pizza : pizzas) {
291 int orderId = pizza.getOrderId();
292 Order order = new Order();
293 order.setId(orderId);
295 TransactionReference tx = getDefaultTransaction();
298 GroupData entity = new GroupData();
299 entity.setState(GroupState.ORDERED);
300 entity.setOrder(order);
302 takeMatchingEntity(entity,
303 orderTakenContainer, tx, RequestTimeout.DEFAULT,
304 "Another waiter just checks if the order is complete");
305 GroupData groupData = takeMatchingEntityIfItExists(entity,
306 pizzeriaGroupContainer, tx, RequestTimeout.INFINITE);
307 int numberOfPizzas = groupData.getOrder().getNumberOfPizzas();
309 Pizza pizzaTemplate = new Pizza();
310 pizzaTemplate.setOrderId(orderId);
312 List<Pizza> pizzasOfOrder = takeMatchingEntities(
313 pizzaTemplate, preparedPizzasContainer, tx,
314 RequestTimeout.DEFAULT,
315 "Cannot take the pizzas from the preparedPizzasContainer");
317 final List<GroupData> groupsWithCompleteOrder = Arrays.asList(groupData);
318 if (pizzasOfOrder.size() == numberOfPizzas) {
319 groupData.setServingWaiter(waiterId);
320 groupData.setState(GroupState.EATING);
321 groupData.getOrder().setStatus(OrderStatus.DELIVERED);
322 sendItemsToContainer(groupsWithCompleteOrder,
323 orderDeliveredContainer, RequestTimeout.DEFAULT,
325 sendItemsToContainer(groupsWithCompleteOrder,
326 pizzeriaGroupContainer, RequestTimeout.DEFAULT,
329 capi.commitTransaction(tx);
331 log.info("Not yet all pizzas prepared! Order with id "
332 + orderId + " has " + numberOfPizzas
333 + " pizzas, but only " + pizzasOfOrder.size()
334 + " pizzas are ready by now!");
335 capi.rollbackTransaction(tx);
337 } catch (NullPointerException e) {
339 } catch (Exception e) {
340 capi.rollbackTransaction(tx);
344 }).createSpaceListenerImpl();
347 private void assignGroupToTable(GroupData lockedGroup,
348 Table lockedFreeTable, TransactionReference tx)
349 throws MzsCoreException {
350 // The new group sits down at the table
351 lockedFreeTable.setGroupId(lockedGroup.getId());
353 // The new group now wants to order
354 lockedGroup.setState(GroupState.SITTING);
355 lockedGroup.setTable(lockedFreeTable);
356 lockedGroup.setTableWaiter(waiterId);
358 final List<Table> freeTables = Arrays.asList(lockedFreeTable);
359 sendItemsToContainer(freeTables,
360 pizzeriaTableContainer, RequestTimeout.ZERO, tx);
361 sendItemsToContainer(freeTables,
362 tableAssignedContainer, RequestTimeout.ZERO, tx);
363 sendItemsToContainer(Arrays.asList(lockedGroup), takeOrderContainer,
364 RequestTimeout.ZERO, tx);
365 sendItemsToContainer(Arrays.asList(lockedGroup), pizzeriaGroupContainer,
366 RequestTimeout.ZERO, tx);
369 capi.commitTransaction(tx);
370 log.info("Assigned table to group with groupId {}",
371 lockedGroup.getId());
372 } catch (Exception e) {
373 log.info("Assigning a table to group with groupId {} failed",
374 lockedGroup.getId());
375 log.info(e.getMessage());
379 private void updatePizzeriaOrderNumber(Order order, TransactionReference tx) throws MzsCoreException {
380 /* get the id of the last order of the pizzeria and set the order accordingly and
382 final OrderId orderId = takeMatchingEntity(new OrderId(null), pizzeriaInfoContainer, tx, RequestTimeout.INFINITE, "The Order id object could not be taken from the space!");
383 final int id = orderId.getId();
384 final int nextId = id + 1;
386 final List<PizzaOrder> orderedPizzas = order.getOrderedPizzas();
387 for (PizzaOrder orderedPizza : orderedPizzas) {
388 orderedPizza.setOrderId(nextId);
390 sendItemsToContainer(Arrays.asList(new OrderId(nextId)), pizzeriaInfoContainer, RequestTimeout.DEFAULT, tx);