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/*
 * Copyright (c) MuleSoft, Inc.  All rights reserved.  http://www.mulesoft.com
 * The software in this package is published under the terms of the CPAL v1.0
 * license, a copy of which has been included with this distribution in the
 * LICENSE.txt file.
 */
package org.mule.routing;

import org.mule.api.MuleContext;
import org.mule.api.MuleEvent;
import org.mule.api.MuleException;
import org.mule.api.context.MuleContextAware;
import org.mule.api.lifecycle.Initialisable;
import org.mule.api.lifecycle.InitialisationException;
import org.mule.api.processor.MessageProcessor;


/**
 * RoundRobin divides the messages it receives among its target routes in round-robin
 * fashion. The set of routes is obtained dynamically using a {@link org.mule.routing.DynamicRouteResolver}
 * 
 * This includes messages received on all threads, so there is no guarantee
 * that messages received from a splitter are sent to consecutively numbered targets.
 */
public class DynamicRoundRobin implements MessageProcessor, Initialisable, MuleContextAware
{

    private RoundRobinRoutingStrategy routingStrategy;
    private MuleContext muleContext;
    private DynamicRouteResolver dynamicRouteResolver;

    @Override
    public MuleEvent process(MuleEvent event) throws MuleException
    {
        return routingStrategy.route(event, dynamicRouteResolver.resolveRoutes(event));
    }

    @Override
    public void initialise() throws InitialisationException
    {
        routingStrategy = new RoundRobinRoutingStrategy(muleContext, new DynamicRouteResolverAdapter(dynamicRouteResolver));
    }

    @Override
    public void setMuleContext(MuleContext context)
    {
        this.muleContext = context;
    }

    /**
     * @param dynamicRouteResolver custom identifiable route resolver to use
     */
    public void setDynamicRouteResolver(DynamicRouteResolver dynamicRouteResolver)
    {
        this.dynamicRouteResolver = dynamicRouteResolver;
    }
}