public ClusterListener() 
{
    //--Constructor---------------------------------------------
}

 abstract public boolean accept(ClusterMessage msg)
Accept only SessionIDMessages

 public boolean equals(Object listener) 
{
        return super.equals(listener);
}

 public CatalinaCluster getCluster() 
{
        return cluster;
}

 public int hashCode() 
{
        return super.hashCode();
}

 abstract public  void messageReceived(ClusterMessage msg)
Callback from the cluster, when a message is received, The cluster will
broadcast it invoking the messageReceived on the receiver.

 public  void setCluster(CatalinaCluster cluster) 
{
        if (log.isDebugEnabled()) {
            if (cluster != null)
                log.debug("add ClusterListener " + this.toString()
                        + " to cluster" + cluster);
            else
                log.debug("remove ClusterListener " + this.toString()
                        + " from cluster");
        }
        this.cluster = cluster;
}