Examples of org.jgroups.blocks.ReplicatedHashtable

org.jgroups.blocks.ReplicatedHashtable

Provides the abstraction of a java.util.Hashtable that is replicated at several locations. Any change to the hashtable (clear, put, remove etc) will transparently be propagated to all replicas in the group. All read-only methods will always access the local replica.

Both keys and values added to the hashtable must be serializable, the reason being that they will be sent across the network to all replicas of the group. Having said this, it is now for example possible to add RMI remote objects to the hashtable as they are derived from java.rmi.server.RemoteObject which in turn is serializable. This allows to lookup shared distributed objects by their name and invoke methods on them, regardless of one's onw location. A ReplicatedHashtable thus allows to implement a distributed naming service in just a couple of lines.

An instance of this class will contact an existing member of the group to fetch its initial state.

Contrary to DistributedHashtable, this class does not make use of RpcDispatcher (and RequestCorrelator) but uses plain asynchronous messages instead. @author Bela Ban @author Alfonso Olias-Sanz @deprecated Use {@link org.jgroups.blocks.ReplicatedHashMap} instead


  
  
  try {
      if(use_replicated_hashtable) {
    ht=new ReplicatedHashtable("HashtableTest", new JChannelFactory(), props, 1000);
    if(debug) {
        debugger=new Debugger((JChannel)((ReplicatedHashtable)ht).getChannel(), cummulative);
    }
    ((ReplicatedHashtable)ht).addNotifier(new Notifier(NUM_ITEMS));
      }


  
  
  try {
      if(use_replicated_hashtable) {
    ht=new ReplicatedHashtable("HashtableTest", new JChannelFactory(), props, 1000);
    ((ReplicatedHashtable)ht).addNotifier(new Notifier(NUM_ITEMS));
      }
      else {
    ht=new DistributedHashtable("HashtableTest", new JChannelFactory(), props, 1000);
    // ((DistributedHashtable)ht).addNotifier(new MyNotifier());

Examples of org.jgroups.blocks.ReplicatedHashtable

Related Classes of org.jgroups.blocks.ReplicatedHashtable