Re: error when use Broadcast Variables cannot find symbol getRuntimeContext()

Posted by Chiwan Park-2 on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/error-when-use-Broadcast-Variables-cannot-find-symbol-getRuntimeContext-tp2010p2011.html

Hi, you should use RichMapFunction not MapFunction. The difference between
RichMapFunction and MapFunction is described in Flink documentation [1].

Regards,
Chiwan Park

[1] https://ci.apache.org/projects/flink/flink-docs-master/apis/programming_guide.html#rich-functions

> On Jul 12, 2015, at 7:51 AM, hagersaleh <[hidden email]> wrote:
>
> import java.util.Collection;
> import org.apache.flink.api.common.functions.MapFunction;
> import org.apache.flink.configuration.Configuration;
> import org.apache.flink.api.java.DataSet;
> import org.apache.flink.api.java.ExecutionEnvironment;
>
>
>   ExecutionEnvironment env =
> ExecutionEnvironment.getExecutionEnvironment();
>
>    DataSet<Integer> toBroadcast = env.fromElements(1, 2, 3);
>
>   DataSet<String> data = env.fromElements("a", "b");
>  data.map(new MapFunction<String, String>() {
>    @Override
>    public void open(Configuration parameters) throws Exception {
>      // 3. Access the broadcasted DataSet as a Collection
>      Collection<Integer> broadcastSet =
> getRuntimeContext().getBroadcastVariable("broadcastSetName");
>    }
>
>
>    @Override
>    public String map(String value) throws Exception {
>        return "hager";
> }
>
> }).withBroadcastSet(toBroadcast, "broadcastSetName");
>
>
> display error
> cannot find symbol
> Collection<Integer> broadcastSet =
> getRuntimeContext().getBroadcastVariable("broadcastSetName");
>  symbol: method getRuntimeContext()
>
> method does not override or implement a method from a supertype
>    @Override
>
>
>
> --
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