I think this is a bug in the scala API.
def writeToSocket(hostname : scala.Predef.String, port :
java.lang.Integer, schema :
org.apache.flink.streaming.util.serialization.SerializationSchema[T,
scala.Array[scala.Byte]]) :
org.apache.flink.streaming.api.datastream.DataStreamSink[T] = { /*
compiled code */ }
On Tue, Jan 19, 2016 at 2:16 PM, Matthias J. Sax <mj...@apache.org> wrote:
> It should work.
>
> Your error message indicates, that your DataStream is of type
> [String,Array[Byte]] and not of type [String].
>
> > Type mismatch, expected: SerializationSchema[String, Array[Byte]],
> actual: SimpleStringSchema
>
> Can you maybe share your code?
>
> -Matthias
>
> On 01/19/2016 01:57 PM, Saiph Kappa wrote:
> > It's DataStream[String]. So it seems that SimpleStringSchema cannot be
> > used in writeToSocket regardless of the type of the DataStream. Right?
> >
> > On Tue, Jan 19, 2016 at 1:32 PM, Matthias J. Sax <mj...@apache.org
> > <mailto:mj...@apache.org>> wrote:
> >
> > What type is your DataStream? It must be DataStream[String] to work
> with
> > SimpleStringSchema.
> >
> > If you have a different type, just implement a customized
> > SerializationSchema.
> >
> > -Matthias
> >
> >
> > On 01/19/2016 11:26 AM, Saiph Kappa wrote:
> > > When I use SimpleStringSchema I get the error: Type mismatch,
> expected:
> > > SerializationSchema[String, Array[Byte]], actual:
> SimpleStringSchema. I
> > > think SimpleStringSchema extends SerializationSchema[String], and
> > > therefore cannot be used as argument of writeToSocket. Can you
> confirm
> > > this please?
> > >
> > > s.writeToSocket(host, port.toInt, new SimpleStringSchema())
> > >
> > >
> > > Thanks.
> > >
> > > On Tue, Jan 19, 2016 at 10:34 AM, Matthias J. Sax <
> mj...@apache.org <mailto:mj...@apache.org>
> > > <mailto:mj...@apache.org <mailto:mj...@apache.org>>> wrote:
> > >
> > > There is SimpleStringSchema.
> > >
> > > -Matthias
> > >
> > > On 01/18/2016 11:21 PM, Saiph Kappa wrote:
> > > > Hi Matthias,
> > > >
> > > > Thanks for your response. The method .writeToSocket seems to
> be what I
> > > > was looking for. Can you tell me what kind of serialization
> schema
> > > > should I use assuming my socket server receives strings. I
> have
> > > > something like this in scala:
> > > >
> > > > |val server =newServerSocket(9999)while(true){val s
> =server.accept()val
> > > >
> in=newBufferedSource(s.getInputStream()).getLines()println(in.next())s.close()}
> > > >
> > > > |
> > > >
> > > > Thanks|
> > > > |
> > > >
> > > >
> > > >
> > > > On Mon, Jan 18, 2016 at 8:46 PM, Matthias J. Sax <
> mj...@apache.org <mailto:mj...@apache.org> <mailto:mj...@apache.org
> > <mailto:mj...@apache.org>>
> > > > <mailto:mj...@apache.org <mailto:mj...@apache.org>
> > <mailto:mj...@apache.org <mailto:mj...@apache.org>>>> wrote:
> > > >
> > > > Hi Saiph,
> > > >
> > > > you can use AllWindowFunction via .apply(...) to get an
> > > .collect method:
> > > >
> > > > From:
> > > >
> > >
> >
> https://ci.apache.org/projects/flink/flink-docs-release-0.10/apis/streaming_guide.html
> > > >
> > > > > // applying an AllWindowFunction on non-keyed window
> > stream
> > > > > allWindowedStream.apply (new
> > > > AllWindowFunction<Tuple2<String,Integer>, Integer,
> > Window>() {
> > > > > public void apply (Window window,
> > > > > Iterable<Tuple2<String, Integer>> values,
> > > > > Collector<Integer> out) throws Exception {
> > > > > int sum = 0;
> > > > > for (value t: values) {
> > > > > sum += t.f1;
> > > > > }
> > > > > out.collect (new Integer(sum));
> > > > > }
> > > > > });
> > > >
> > > > If you consume all those value via an sink, the sink
> > will run
> > > an the
> > > > cluster. You can use .writeToSocket(...) as sink:
> > > >
> > >
> >
> https://ci.apache.org/projects/flink/flink-docs-release-0.10/apis/streaming_guide.html#data-sinks
> > > >
> > > > -Matthias
> > > >
> > > >
> > > > On 01/18/2016 06:30 PM, Saiph Kappa wrote:
> > > > > Hi,
> > > > >
> > > > > After performing a windowAll() on a
> DataStream[String], is
> > > there any
> > > > > method to collect and return an array with all Strings
> > > within a window
> > > > > (similar to .collect in Spark).
> > > > >
> > > > > I basically want to ship all strings in a window to a
> > remote
> > > server
> > > > > through a socket, and want to use the same socket
> > connection
> > > for all
> > > > > strings that I send. The method .addSink iterates over
> all
> > > > records, but
> > > > > does the provided function runs on the flink client or
> on
> > > the server?
> > > > >
> > > > > Thanks.
> > > >
> > > >
> > >
> > >
> >
> >
>
>
