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