Awesome, thanks! That was what I was looking for.

On Monday, October 31, 2016 at 9:33:39 AM UTC-7, Eric Anderson wrote:
>
> Blocking stub observers thread interruption; if the thread is interrupted 
> it will cancel the RPC.
>
> For async stub, you can create a CancellableContext and cancel it:
>
> CancellableContext withCancellation = Context.current().withCancellation();
> withCancellation.run(new Runnable() {
>   @Override public void run() {
>     stub.listFeatures(rectangle, observer);
>   }
> });
>
> When the RPC completes, make sure to call withCancellation.cancel(null);, 
> otherwise you can start retaining memory.
>
> When you want to cancel the RPC call withCancellation.cancel(someEx);.  
> The exception is just used for your own debugging, since without it it 
> would be hard to tell where cancellations come from.
>
> On Wed, Oct 19, 2016 at 5:08 PM, Edmund <[email protected] <javascript:>> 
> wrote:
>
>> Hello!
>>
>> I am trying to close a server-side streaming stream by the client but 
>> cannot seem to find a way to do it without closing the whole connection or 
>> channel. The proto file has a service like this: 
>>
>> rpc ListFeatures(Rectangle) returns (stream Feature) {}
>>
>> When I use stub.ListFeatures() it does not return a StreamObserver like 
>> a bi-directional stream. So I cannot call onComplete() and have the 
>> stream close without closing the channel.
>>
>> Any thoughts?
>>
>> * I also tried using a blockingStub, loop and flag. However, it would get 
>> stuck in hasNext()when waiting for messages and I cannot break out with 
>> a flag
>>
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