emit watermarks

[Radu Tudoran]

 

Hi,

 

Is there some way to emit a watermark in the trigger?

 

I see that in the evictor there is the option to check the StreamRecord<Object> if it is a watermark..so I would hope that there is some option also to create them

 

[Kostas Kloudas]

Hi Radu,

Watermarks cannot be emitted by the triggers.

Their responsibility is just to tell the operator to do (or not do) sth 

with the data it has gathered. Thus the name Trigger :P. 

Eviction policies allow you to also filter some elements out 

before applying your function. But that is as far as it goes 

concerning input element modification.

For emitting watermarks you should look at the 

assignTimestampsAndWatermarks methods in the 

DataStream API.

Cheers,

Kostas

 

On Sep 22, 2016, at 10:44 AM, Radu Tudoran <[hidden email]> wrote:

 

Hi,

 

Is there some way to emit a watermark in the trigger?

 

I see that in the evictor there is the option to check the StreamRecord<Object> if it is a watermark..so I would hope that there is some option also to create them