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