Spring Integration : How to know whether two and more interfaces are succeed and allow business logic go on next step? -

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I am doing some integer integration for other systems and using Spring Integration. 

  What I want to achieve is like the following: System :: A -> B - & gt; CA?? A - & gt; B. Are each seven integrated one ?? ¡B is to check whether it receives all 7 integration data. ¢ ¢ Then B should decide to remove the data that were derived from those figures.   
 at a time ?? ¡, I can not find a way to apply it with Spring Integreton at first glance, I thought I could just make it with aggregator pattern but now, I can not make sure of traffic and how to check the logic .  
 Please give some advice to make these things with spring integration. I want to avoid the method of implementing with hardcoding:  release-strategy-expression = "size () == 7"   
 
 
 / code>. If you need more sophistication than that, then you will need to implement a custom release strategy.

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