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