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From Till Rohrmann <trohrm...@apache.org>
Subject Re: key
Date Mon, 30 Nov 2015 16:38:25 GMT
Hi Radu,

if you want to use custom types as keys, then these custom types have to
implement the Key interface.

Cheers,
Till
​

On Mon, Nov 30, 2015 at 5:28 PM, Radu Tudoran <radu.tudoran@huawei.com>
wrote:

> Hi,
>
>
>
> I want to apply a “keyBy operator on a stream”.
>
> The string is of type MyEvent. This is a simple type that contains 2 longs
> and and int or string
>
>
>
> However, when applying this I get
>
>
>
> Exception in thread "main"
> *org.apache.flink.api.common.InvalidProgramException*: This type
> (GenericType<Event>) cannot be used as key.
>
>
>
> Can you give me a hint about a solution to this?
>
>
>
> Thanks
>
>
>
> Dr. Radu Tudoran
>
> Research Engineer
>
> IT R&D Division
>
>
>
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