@Override
	public void beforeWrite(List<? extends Object> items) {
		publish(items.size() + " items to be written.");
	}
@author Gunnar Hillert
@author Ilayaperumal Gopinathan
@since 1.0
spring-xd-dirt/src/main/java/org/springframework/xd/dirt/plugins/job/support/listener/SimpleXdItemListener.java