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package org.shoal.ha.cache.api;

import org.shoal.ha.cache.impl.command.Command;
import org.shoal.ha.cache.impl.command.CommandManager;


/**
 * @author Mahesh Kannan
 *
 */
public abstract class AbstractCommandInterceptor {

    protected String storeName;

    protected DataStoreContext dsc;
    
    private CommandManager cm;
    
    private AbstractCommandInterceptor next;
  
    private AbstractCommandInterceptor prev;
    
    public void initialize(DataStoreContext dsc) {
        this.dsc = dsc;
        this.cm = dsc.getCommandManager();

        this.storeName = dsc.getServiceName();
    }

    public final DataStoreContext getDataStoreContext() {
        return dsc;
    }

    public CommandManager getCommandManager() {
        return cm;
    }

    public final void setNext(AbstractCommandInterceptor next) {
        this.next = next;
    }

    public final void setPrev(AbstractCommandInterceptor prev) {
        this.prev = prev;
    }

    public final AbstractCommandInterceptor getNext() {
        return next;    
    }
    
    public final AbstractCommandInterceptor getPrev() {
        return prev;
    }

    public void onTransmit(Command cmd, String initiator)
        throws DataStoreException {
        AbstractCommandInterceptor n = getNext();
        if (n != null) {
            n.onTransmit(cmd, initiator);
        }
    }

    public void onReceive(Command cmd, String initiator)
        throws DataStoreException {
        AbstractCommandInterceptor p = getPrev();
        if (p != null) {
            p.onReceive(cmd, initiator);
        }
    }

    public void close() {}

}