Examples of org.jgroups.View

org.jgroups.View
A view is a local representation of the current membership of a group. Only one view is installed in a channel at a time. Views contain the address of its creator, an ID and a list of member addresses. These adresses are ordered, and the first address is always the coordinator of the view. This way, each member of the group knows who the new coordinator will be if the current one crashes or leaves the group. The views are sent between members using the VIEW_CHANGE event @author Bela Ban @version $Id: View.java,v 1.20 2008/02/20 15:51:57 belaban Exp $

   
   private synchronized void calculateFailoverMap()
   {
     failoverMap.clear();
     
     View view = groupMember.getCurrentView();
     
     Vector members = view.getMembers();
       
     for (int i = 0; i < members.size(); i++)
     {
        Address address = (Address)members.get(i);

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   @Override
   public int getViewId() {
      if (channel == null)
         throw new CacheException("The cache has been stopped and invocations are not allowed!");
      View view = channel.getView();
      if (view == null)
         return -1;
      return (int) view.getVid().getId();
   }

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   private synchronized void calculateFailoverMap()
   {
     failoverMap.clear();
     
     View view = groupMember.getCurrentView();
     
     Vector members = view.getMembers();
       
     for (int i = 0; i < members.size(); i++)
     {
        Address address = (Address)members.get(i);

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    * @return
    */
   private List<Address> checkBuddyStatus(List<Address> members)
   {
      Channel ch = configuration.getRuntimeConfig().getChannel();
      View currentView = ch.getView();
      List<Address> deadBuddies = new LinkedList<Address>();
      for (Address a : members) if (!currentView.containsMember(a)) deadBuddies.add(a);
      return deadBuddies;
   }

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      private Vector<Address> oldMembers;


      @ViewChanged
      public void handleViewChange(ViewChangedEvent event)
      {
         View newView = event.getNewView();
         if (trace)
            log.trace("BuddyManager CacheListener - got view change with new view " + newView);
         Vector<Address> newMembers = newView.getMembers();


         // the whole 'oldMembers' concept is only used for buddy pool announcements.
         MembershipChange mc = new MembershipChange(oldMembers == null ? null : new Vector<Address>(oldMembers), new Vector<Address>(newMembers));
         enqueueViewChange(mc);
         if (oldMembers == null) oldMembers = new Vector<Address>();

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   private synchronized void calculateFailoverMap()
   {
     failoverMap.clear();
     
     View view = groupMember.getCurrentView();
     
     Vector members = view.getMembers();
       
     for (int i = 0; i < members.size(); i++)
     {
        Address address = (Address)members.get(i);

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   private boolean needsToRejoin(View v) {
      if (v instanceof MergeView) {
         MergeView mv = (MergeView) v;
         org.jgroups.Address coord = v.getMembers().get(0);
         View winningPartition = null;
         for (View p : mv.getSubgroups()) {
            if (p.getMembers().get(0).equals(coord)) {
               winningPartition = p;
               break;
            }
         }


         if (!winningPartition.containsMember(channel.getAddress())) return true;
      }
      return false;
   }

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    * @return
    */
   private List<Address> checkBuddyStatus(List<Address> members)
   {
      Channel ch = configuration.getRuntimeConfig().getChannel();
      View currentView = ch.getView();
      List<Address> deadBuddies = new LinkedList<Address>();
      for (Address a : members) if (!currentView.containsMember(a)) deadBuddies.add(a);
      return deadBuddies;
   }

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      private Vector<Address> oldMembers;


      @ViewChanged
      public void handleViewChange(ViewChangedEvent event)
      {
         View newView = event.getNewView();
         if (trace)
            log.trace("BuddyManager CacheListener - got view change with new view " + newView);
         Vector<Address> newMembers = newView.getMembers();


         // the whole 'oldMembers' concept is only used for buddy pool announcements.
         if (config.getBuddyPoolName() == null)
         {
            enqueueViewChange(new MembershipChange(null, new Vector<Address>(newMembers)));

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   @Override
   public int getViewId() {
      if (channel == null)
         throw new CacheException("The cache has been stopped and invocations are not allowed!");
      View view = channel.getView();
      if (view == null)
         return -1;
      return (int) view.getVid().getId();
   }

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