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 Capi capi;
  44         protected NotificationManager notificationMgr;
  45
  46         public AbstractXVSMConnector() {
  47                 initSpaceCommunication();
  48         }
  49
  50         public void initSpaceCommunication() {
  51                 try {
  52                         MzsCore core = DefaultMzsCore.newInstanceWithoutSpace();
  53                         capi = new Capi(core);
  54                         notificationMgr = new NotificationManager(core);
  55                 } catch (Exception e) {
  56                         log.error("Space connection could not be established! Have you started the Space Server?");
  57                         handleSpaceErrorAndTerminate(e);
  58                 }
  59         }
  60
  61         public void useTablesContainer() {
  62                 tablesContainer = useContainer(Util.TABLES_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  63         }
  64
  65         public void usePreparePizzasContainer() {
  66                 preparePizzasContainer = useContainer(Util.PREPARE_PIZZAS, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  67         }
  68
  69         public void useTakeOrderContainer() {
  70                 takeOrderContainer = useContainer(Util.TAKE_ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  71         }
  72
  73         public void useOrdersContainer() {
  74                 ordersContainer = useContainer(Util.ORDER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  75         }
  76
  77         public void useGroupsContainer() {
  78                 groupsContainer = useContainer(Util.GROUPS_CONTAINER, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  79         }
  80
  81         public void useAssignTableContainer() {
  82                 assignTableContainer = useContainer(Util.ASSIGN_TABLE, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false))) ;
  83         }
  84
  85         public void useFreeTablesContainer() {
  86                 freeTablesContainer = useContainer(Util.FREE_TABLES, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false)));
  87         }
  88
  89         public void useDeliverPizzasContainer() {
  90                 deliverPizzasContainer = useContainer(Util.DELIVER_PIZZAS, createCoordinators(new AnyCoordinator(), new LindaCoordinator(false)));
  91         }
  92
  93         private ContainerReference useContainer(String containerName, List<Coordinator> coordinators) {
  94                 try {
  95                         return Util.getOrCreateNamedContainer(Util.SERVER_ADDR, containerName, capi, coordinators);
  96                 } catch (MzsCoreException e) {
  97                         handleSpaceErrorAndTerminate(e);
  98                 }
  99
 100                 return null;
 101         }
 102
 103         private List<Coordinator> createCoordinators(Coordinator... coordinator) {
 104                 return Arrays.asList(coordinator);
 105         }
 106
 107         protected void handleSpaceErrorAndTerminate(Exception e) {
 108                 log.error(e.getMessage());
 109                 e.printStackTrace();
 110                 System.exit(1);
 111         }
 112
 113         protected <T extends Serializable> void sendItemsToContainer(
 114                 List<T> items, ContainerReference cref, long timeout, TransactionReference tx) {
 115
 116                         try {
 117                                 List<Entry> entries = new ArrayList<>();
 118                                 for (Serializable item : items) {
 119                                         entries.add(new Entry(item));
 120                                 }
 121                                 capi.write(entries, cref, timeout, tx);
 122                         } catch (Exception e) {
 123                                 log.info(e.getMessage());
 124                                 e.printStackTrace();
 125                         }
 126                 }
 127
 128         @SuppressWarnings("unchecked")
 129         protected <T extends Serializable> T takeEntityByTemplateFromContainer(
 130                         T entity, ContainerReference ref, TransactionReference tx, long timeout, String errorMsg)
 131                         throws MzsCoreException {
 132                                 try {
 133                                         LindaSelector sel = LindaCoordinator.newSelector(entity, 1);
 134                                         T singleEntity = null;
 135
 136                                         ArrayList<Serializable> entities = capi.take(ref,  sel, timeout, tx);
 137
 138                                         return (T) CapiUtil.getSingleEntry(entities);
 139                                 } catch (CountNotMetException e) {
 140                                         capi.rollbackTransaction(tx);
 141
 142                                         throw new EntityNotFoundByTemplate(errorMsg);
 143                                 } catch(MzsTimeoutException e) {
 144                                         capi.rollbackTransaction(tx);
 145
 146                                         throw new EntityNotFoundByTemplate(errorMsg);
 147                                 }
 148                         }
 149
 150         protected <T extends Serializable> List<T> castEntries(List<? extends Serializable> entries) {
 151                 List<T> newList = new ArrayList<T>();
 152                 List<Entry> newEntries = (List<Entry>) entries;
 153                 for (Entry entry : newEntries) {
 154                         newList.add((T) entry.getValue());
 155                 }
 156                 return newList;
 157         }
 158
 159         public void sendTablesToSpace(List<Table> tables) {
 160                 sendItemsToContainer(tables, tablesContainer, RequestTimeout.DEFAULT, null);
 161         }
 162
 163         public void sendFreeTablesToSpace(List<Table> tables) {
 164                 sendItemsToContainer(tables, freeTablesContainer, RequestTimeout.DEFAULT, null);
 165                 sendTablesToSpace(tables);
 166         }
 167
 168         public void sendNewGroupsToSpace(List<GroupData> newGroups) {
 169                 sendItemsToContainer(newGroups, groupsContainer, RequestTimeout.DEFAULT, null);
 170                 sendItemsToContainer(newGroups, assignTableContainer, RequestTimeout.DEFAULT, null);
 171         }
 172 }