(DEPRECATED) Apache Flink User Mailing List archive.

Trying to implement UpsertStreamTableSink in Java

Posted by Porritt, James on
URL: http://deprecated-apache-flink-user-mailing-list-archive.369.s1.nabble.com/Trying-to-implement-UpsertStreamTableSink-in-Java-tp21722.html

I put this class together when trying to create my own upsertable table sink in Java:

public class MyTableSink implements UpsertStreamTableSink<Row> {

@Override

public TableSink<Tuple2<Boolean, Row>> configure(String[] fieldNames, TypeInformation<?>[] fieldTypes) {

return null;

}

@Override

public void setKeyFields(String[] keys) {

System.out.println("setKeyFields" + keys);

}

@Override

public void setIsAppendOnly(Boolean isAppendOnly) {

}

@Override

public String[] getFieldNames() {

return new String[0];

}

@Override

public TypeInformation<?>[] getFieldTypes() {

return new TypeInformation[0];

}

@Override

public TypeInformation<Row> getRecordType() {

return null;

}

@Override

public TupleTypeInfo<Tuple2<Boolean, Row>> getOutputType() {

return new TupleTypeInfo<Tuple2<Boolean, Row>>();

}

@Override

public void emitDataStream(DataStream<Tuple2<Boolean, Row>> dataStream) {

dataStream.print();

}

I try and link it to my StreamTable with:

mystreamtable.writeToSink(new MyTableSink());

For some reason though I’m getting the error:

org.apache.flink.client.program.ProgramInvocationException: The main method caused an error.

at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:545)

at org.apache.flink.client.program.PackagedProgram.invokeInteractiveModeForExecution(PackagedProgram.java:420)

at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:404)

at org.apache.flink.client.cli.CliFrontend.executeProgram(CliFrontend.java:781)

at org.apache.flink.client.cli.CliFrontend.runProgram(CliFrontend.java:275)

at org.apache.flink.client.cli.CliFrontend.run(CliFrontend.java:210)

at org.apache.flink.client.cli.CliFrontend.parseParameters(CliFrontend.java:1020)

at org.apache.flink.client.cli.CliFrontend.lambda$main$9(CliFrontend.java:1096)

at java.security.AccessController.doPrivileged(Native Method)

at javax.security.auth.Subject.doAs(Subject.java:422)

at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1754)

at org.apache.flink.runtime.security.HadoopSecurityContext.runSecured(HadoopSecurityContext.java:41)

at org.apache.flink.client.cli.CliFrontend.main(CliFrontend.java:1096)

Caused by: org.apache.flink.table.api.TableException: Stream Tables can only be emitted by AppendStreamTableSink, RetractStreamTableSink, or UpsertStreamTableSink.

at org.apache.flink.table.api.StreamTableEnvironment.writeToSink(StreamTableEnvironment.scala:284)

at org.apache.flink.table.api.Table.writeToSink(table.scala:862)

at org.apache.flink.table.api.Table.writeToSink(table.scala:830)

at alphagen_stats.KafkaAlphaGen.main(KafkaAlphaGen.java:265)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)

at java.lang.reflect.Method.invoke(Method.java:498)

at org.apache.flink.client.program.PackagedProgram.callMainMethod(PackagedProgram.java:528)

... 12 more

What am I doing wrong?

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