StandardGate.java

/*
 * Copyright 2011-2014 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/**
 * 
 */
package pl.com.bottega.cqrs.command.impl;

import javax.inject.Inject;

import org.springframework.stereotype.Component;

import pl.com.bottega.cqrs.annotations.Command;
import pl.com.bottega.cqrs.command.Gate;


@Component
public class StandardGate implements Gate {
	
	@Inject
	private RunEnvironment runEnvironment;
	
	private GateHistory gateHistory = new GateHistory();

	/* (non-Javadoc)
	 * @see pl.com.bottega.cqrs.command.impl.Gate#dispatch(java.lang.Object)
	 */
	@Override
	public Object dispatch(Object command){
		if (! gateHistory.register(command)){
			//TODO log.info(duplicate)
			return null;//skip duplicate
		}
			
		if (isAsynchronous(command)){
			//TODO add to the queue. Queue should send this command to the RunEnvironment
			return null;
		}
		
		
		return runEnvironment.run(command);
	}

	/**
	 * @param command
	 * @return
	 */
	private boolean isAsynchronous(Object command) {
		if (! command.getClass().isAnnotationPresent(Command.class))
			return false;
		
		Command commandAnnotation = command.getClass().getAnnotation(Command.class);		
		return commandAnnotation.asynchronous();		
	}

	
}