@Override
	public void afterPropertiesSet() throws Exception {
		Assert.notNull(applicationContext, "The 'applicationContext' property cannot be null");
		if (this.evaluationContext == null) {
			this.evaluationContext = IntegrationContextUtils.getEvaluationContext(getBeanFactory());
		}
		onInit();
	}
Set whether subscriptions to taps/topics are durable.
@param defaultDurableSubscription true for durable (default false).
spring-xd-messagebus-spi/src/main/java/org/springframework/xd/dirt/integration/bus/MessageBusSupport.java