src/main/java/at/ac/tuwien/sbc/valesriegler/xvsm/AbstractXVSMConnector.java

   1 package at.ac.tuwien.sbc.valesriegler.xvsm;
   2
   3 import java.io.Serializable;
   4 import java.util.ArrayList;
   5 import java.util.Arrays;
   6 import java.util.List;
   7
   8 import org.mozartspaces.capi3.AnyCoordinator;
   9 import org.mozartspaces.capi3.Coordinator;
  10 import org.mozartspaces.capi3.CountNotMetException;
  11 import org.mozartspaces.capi3.LindaCoordinator;
  12 import org.mozartspaces.capi3.LindaCoordinator.LindaSelector;
  13 import org.mozartspaces.core.Capi;
  14 import org.mozartspaces.core.CapiUtil;
  15 import org.mozartspaces.core.ContainerReference;
  16 import org.mozartspaces.core.DefaultMzsCore;
  17 import org.mozartspaces.core.Entry;
  18 import org.mozartspaces.core.MzsTimeoutException;
  19 import org.mozartspaces.core.MzsConstants.RequestTimeout;
  20 import org.mozartspaces.core.MzsCore;
  21 import org.mozartspaces.core.MzsCoreException;
  22 import org.mozartspaces.core.TransactionReference;
  23 import org.mozartspaces.notifications.NotificationManager;
  24 import org.slf4j.Logger;
  25 import org.slf4j.LoggerFactory;
  26
  27 import at.ac.tuwien.sbc.valesriegler.common.Util;
  28 import at.ac.tuwien.sbc.valesriegler.types.GroupData;
  29 import at.ac.tuwien.sbc.valesriegler.types.Table;
  30
  31 public abstract class AbstractXVSMConnector {
  32         private static final Logger log = LoggerFactory.getLogger(AbstractXVSMConnector.class);
  33
  34         protected ContainerReference tablesContainer;
  35         protected ContainerReference groupsContainer;
  36         protected ContainerReference assignTableContainer;
  37         protected ContainerReference takeOrderContainer;
  38         protected ContainerReference ordersContainer;
  39         protected ContainerReference preparePizzasContainer;
  40         protected ContainerReference deliverPizzasContainer;
  41         protected ContainerReference paymentContainer;
  42         protected ContainerReference freeTablesContainer;
  43         protected ContainerReference pizzaInProgressContainer;
  44         protected Capi capi;
  45         protected NotificationManager notificationMgr;
  46
  47         public AbstractXVSMConnector() {
  48                 initSpaceCommunication();
  49         }
  50
  51         public void initSpaceCommunication() {
  52                 try {
  53                         MzsCore core = DefaultMzsCore.newInstanceWithoutSpace();
  54                         capi = new Capi(core);
  55                         notificationMgr = new NotificationManager(core);
  56                 } catch (Exception e) {
  57                         log.error("Space connection could not be established! Have you started the Space Server?");
  58                         handleSpaceErrorAndTerminate(e);
  59                 }
  60         }
  61
  62         public void usePizzaInProgressContainer() {
  63                 pizzaInProgressContainer = useContainer(Util.PIZZAS_IN_PROGRESS, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  64         }
  65
  66         public void useTablesContainer() {
  67                 tablesContainer = useContainer(Util.TABLES_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  68         }
  69
  70         public void usePreparePizzasContainer() {
  71                 preparePizzasContainer = useContainer(Util.PREPARE_PIZZAS, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  72         }
  73
  74         public void useTakeOrderContainer() {
  75                 takeOrderContainer = useContainer(Util.TAKE_ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  76         }
  77
  78         public void useOrdersContainer() {
  79                 ordersContainer = useContainer(Util.ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  80         }
  81
  82         public void useGroupsContainer() {
  83                 groupsContainer = useContainer(Util.GROUPS_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  84         }
  85
  86         public void useAssignTableContainer() {
  87                 assignTableContainer = useContainer(Util.ASSIGN_TABLE, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  88         }
  89
  90         public void useFreeTablesContainer() {
  91                 freeTablesContainer = useContainer(Util.FREE_TABLES, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false)));
  92         }
  93
  94         public void useDeliverPizzasContainer() {
  95                 deliverPizzasContainer = useContainer(Util.DELIVER_PIZZAS, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false)));
  96         }
  97
  98         private ContainerReference useContainer(String containerName, List<Coordinator> coordinators) {
  99                 try {
 100                         return Util.getOrCreateNamedContainer(Util.SERVER_ADDR, containerName, capi, coordinators);
 101                 } catch (MzsCoreException e) {
 102                         handleSpaceErrorAndTerminate(e);
 103                 }
 104
 105                 return null;
 106         }
 107
 108         private List<Coordinator> createCoordinators(Coordinator... coordinator) {
 109                 return Arrays.asList(coordinator);
 110         }
 111
 112         protected void handleSpaceErrorAndTerminate(Exception e) {
 113                 log.error(e.getMessage());
 114                 e.printStackTrace();
 115                 System.exit(1);
 116         }
 117
 118         protected <T extends Serializable> void sendItemsToContainer(
 119                 List<T> items, ContainerReference cref, long timeout, TransactionReference tx) {
 120
 121                         try {
 122                                 List<Entry> entries = new ArrayList<>();
 123                                 for (Serializable item : items) {
 124                                         entries.add(new Entry(item));
 125                                 }
 126                                 capi.write(entries, cref, timeout, tx);
 127                         } catch (Exception e) {
 128                                 log.info(e.getMessage());
 129                                 e.printStackTrace();
 130                         }
 131                 }
 132
 133         @SuppressWarnings("unchecked")
 134         protected <T extends Serializable> T takeEntityByTemplateFromContainer(
 135                         T entity, ContainerReference ref, TransactionReference tx, long timeout, String errorMsg)
 136                         throws MzsCoreException {
 137                                 try {
 138                                         LindaSelector sel = LindaCoordinator.newSelector(entity, 1);
 139                                         T singleEntity = null;
 140
 141                                         ArrayList<Serializable> entities = capi.take(ref,  sel, timeout, tx);
 142
 143                                         return (T) CapiUtil.getSingleEntry(entities);
 144                                 } catch (CountNotMetException e) {
 145                                         capi.rollbackTransaction(tx);
 146
 147                                         throw new EntityNotFoundByTemplate(errorMsg);
 148                                 } catch(MzsTimeoutException e) {
 149                                         capi.rollbackTransaction(tx);
 150
 151                                         throw new EntityNotFoundByTemplate(errorMsg);
 152                                 }
 153                         }
 154
 155         protected <T extends Serializable> List<T> castEntries(List<? extends Serializable> entries) {
 156                 List<T> newList = new ArrayList<T>();
 157                 List<Entry> newEntries = (List<Entry>) entries;
 158                 for (Entry entry : newEntries) {
 159                         newList.add((T) entry.getValue());
 160                 }
 161                 return newList;
 162         }
 163
 164         public void sendTablesToSpace(List<Table> tables) {
 165                 sendItemsToContainer(tables, tablesContainer, RequestTimeout.DEFAULT, null);
 166         }
 167
 168         public void sendFreeTablesToSpace(List<Table> tables) {
 169                 sendItemsToContainer(tables, freeTablesContainer, RequestTimeout.DEFAULT, null);
 170                 sendTablesToSpace(tables);
 171         }
 172
 173         public void sendNewGroupsToSpace(List<GroupData> newGroups) {
 174                 sendItemsToContainer(newGroups, groupsContainer, RequestTimeout.DEFAULT, null);
 175                 sendItemsToContainer(newGroups, assignTableContainer, RequestTimeout.DEFAULT, null);
 176         }
 177 }