Thanks Chiwan and Chesnay I'm happy :-) On lun., mar. 7, 2016 at 14:18, Chiwan Park wrote: Hi Toletum,
You can initialize a JDBC connection with RichSinkFunction [1]. There are two methods, `open` and `close`. The `open` method is called once before calling `invoke` method. The `close` method is called lastly. Note that you should add `transient` keyword to the JDBC connection object. Regards, Chiwan Park [1]: https://ci.apache.org/projects/flink/flink-docs-master/api/java/org/apache/flink/streaming/api/functions/sink/RichSinkFunction.html (https://ci.apache.org/projects/flink/flink-docs-master/api/java/org/apache/flink/streaming/api/functions/sink/RichSinkFunction.html) On Mar 7, 2016, at 10:08 PM, [email protected] (mailto:[email protected]) wrote: Hi! I'm doing a process which reads from kafka, makes some things... and after writes on Database (NEO4J). I can read from kafka, and make some things.... But... I have problems with write on Database (JDBC). I tried use a SinkFunction.... It works, but it create a connection each invoke method is called. -------- DataStream messageStream = this.env.addSource(new FlinkKafkaConsumer082(properties.getProperty("topic"), new SimpleStringSchema(), properties)); messageStream.map(new StreamingCrimeSplitter .filter(new filterFunction()) .keyBy(1); .addSink(new sinkFunction()); -------- -------- public class sinkFunction implements SinkFunction { private static final long serialVersionUID = 2859601213304525959L; @Override public void invoke(Tuple7 crime) throws Exception { System.out.println(crime.f0); //JDBC connection } } -------- Somebody knows how I could do just one connection? I tried to do in the Constructor but the JDBC is not serializable. Thanks Toletum
