int-jdbc:inbound-channel-adapter channel depth

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int-jdbc:inbound-channel-adapter channel depth



if the configured channel in int-jdbc:inbound-channel-adapter is full,after that polling happens or not ?
Can I use a queue channel in int-jdbc:inbound-channel-adapter?
My requirement is that if the channel is full,no DB call should make ,until channel is free.




1 Answer
1



You need to use a QueueChannel with restricted capacity. As far as any Inbound Channel Adapter uses a MessagingTemplate with the sendTimeout = -1, the QueueChannel performs a put() operation on the underlying LinkedBlockingQueue:


QueueChannel


MessagingTemplate


sendTimeout = -1


QueueChannel


put()


LinkedBlockingQueue


/**
* Inserts the specified element at the tail of this queue, waiting if
* necessary for space to become available.
*
* @throws InterruptedException {@inheritDoc}
* @throws NullPointerException {@inheritDoc}
*/
public void put(E e) throws InterruptedException {



To ensure that the poller is blocked until space is available you should use a fixed-delay option do not allow any parallel calls to DB.


fixed-delay



So, in other words so far so good as long as you use default options.






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