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 deliverPizzasContainer;
  40         protected ContainerReference paymentContainer;
  41         protected ContainerReference freeTablesContainer;
  42         protected Capi capi;
  43         protected NotificationManager notificationMgr;
  44
  45         public AbstractXVSMConnector() {
  46                 initSpaceCommunication();
  47         }
  48
  49         public void initSpaceCommunication() {
  50                 try {
  51                         MzsCore core = DefaultMzsCore.newInstanceWithoutSpace();
  52                         capi = new Capi(core);
  53                         notificationMgr = new NotificationManager(core);
  54                 } catch (Exception e) {
  55                         log.error("Space connection could not be established! Have you started the Space Server?");
  56                         handleSpaceErrorAndTerminate(e);
  57                 }
  58         }
  59
  60         public void useTablesContainer() {
  61                 tablesContainer = useContainer(Util.TABLES_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  62         }
  63
  64         public void useTakeOrderContainer() {
  65                 takeOrderContainer = useContainer(Util.TAKE_ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  66         }
  67
  68         public void useorderContainer() {
  69                 ordersContainer = useContainer(Util.ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  70         }
  71
  72         public void useGroupsContainer() {
  73                 groupsContainer = useContainer(Util.GROUPS_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  74         }
  75
  76         public void useAssignTableContainer() {
  77                 assignTableContainer = useContainer(Util.ASSIGN_TABLE, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  78         }
  79
  80         public void useFreeTablesContainer() {
  81                 freeTablesContainer = useContainer(Util.FREE_TABLES, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false)));
  82         }
  83
  84         private ContainerReference useContainer(String containerName, List<Coordinator> coordinators) {
  85                 try {
  86                         return Util.getOrCreateNamedContainer(Util.SERVER_ADDR, containerName, capi, coordinators);
  87                 } catch (MzsCoreException e) {
  88                         handleSpaceErrorAndTerminate(e);
  89                 }
  90
  91                 return null;
  92         }
  93
  94         private List<Coordinator> createCoordinators(Coordinator... coordinator) {
  95                 return Arrays.asList(coordinator);
  96         }
  97
  98         protected void handleSpaceErrorAndTerminate(Exception e) {
  99                 log.error(e.getMessage());
 100                 e.printStackTrace();
 101                 System.exit(1);
 102         }
 103
 104         protected <T extends Serializable> void sendItemsToContainer(
 105                 List<T> items, ContainerReference cref, long timeout, TransactionReference tx) {
 106
 107                         try {
 108                                 List<Entry> entries = new ArrayList<>();
 109                                 for (Serializable item : items) {
 110                                         entries.add(new Entry(item));
 111                                 }
 112                                 capi.write(entries, cref, timeout, tx);
 113                         } catch (Exception e) {
 114                                 log.info(e.getMessage());
 115                                 e.printStackTrace();
 116                         }
 117                 }
 118
 119         @SuppressWarnings("unchecked")
 120         protected <T extends Serializable> T takeEntityByTemplateFromContainer(
 121                         T entity, ContainerReference ref, TransactionReference tx, long timeout, String errorMsg)
 122                         throws MzsCoreException {
 123                                 try {
 124                                         LindaSelector sel = LindaCoordinator.newSelector(entity, 1);
 125                                         T singleEntity = null;
 126
 127                                         ArrayList<Serializable> entities = capi.take(ref,  sel, timeout, tx);
 128
 129                                         return (T) CapiUtil.getSingleEntry(entities);
 130                                 } catch (CountNotMetException e) {
 131                                         capi.rollbackTransaction(tx);
 132
 133                                         throw new EntityNotFoundByTemplate(errorMsg);
 134                                 } catch(MzsTimeoutException e) {
 135                                         capi.rollbackTransaction(tx);
 136
 137                                         throw new EntityNotFoundByTemplate(errorMsg);
 138                                 }
 139                         }
 140
 141         protected <T extends Serializable> List<T> castEntries(List<? extends Serializable> entries) {
 142                 List<T> newList = new ArrayList<T>();
 143                 List<Entry> newEntries = (List<Entry>) entries;
 144                 for (Entry entry : newEntries) {
 145                         newList.add((T) entry.getValue());
 146                 }
 147                 return newList;
 148         }
 149
 150         public void sendTablesToSpace(List<Table> tables) {
 151                 sendItemsToContainer(tables, tablesContainer, RequestTimeout.DEFAULT, null);
 152         }
 153
 154         public void sendFreeTablesToSpace(List<Table> tables) {
 155                 sendItemsToContainer(tables, freeTablesContainer, RequestTimeout.DEFAULT, null);
 156                 sendTablesToSpace(tables);
 157         }
 158
 159         public void sendNewGroupsToSpace(List<GroupData> newGroups) {
 160                 sendItemsToContainer(newGroups, groupsContainer, RequestTimeout.DEFAULT, null);
 161                 sendItemsToContainer(newGroups, assignTableContainer, RequestTimeout.DEFAULT, null);
 162         }
 163
 164 }