Apache Flink如何从Java ObjectNode中下沉 - ＆gt; JSON字符串？

Question

所以这需要JSON字符串 - ＆gt; Java ObjectNode。

    final DataStream<ObjectNode> inputStream = env
        .addSource(new RMQSource<ObjectNode>(
            connectionConfig,                   // config for the RabbitMQ connection
            "start",                            // name of the RabbitMQ queue to consume
            true,                               // use correlation ids; can be false if only at-least-once is required
            new JSONDeserializationSchema()))   // deserialization schema to turn messages into Java objects
        .setParallelism(1);                     // non-parallel source is only required for exactly-once

如何将它们从Java ObjectNode中恢复 - ＆gt; JSON字符串？

stream.addSink(new RMQSink<ObjectNode>(
            connectionConfig,
            "stop",
            new JSONSerializationSchema()
        ));

JSONSerializationSchema不存在，但我需要这样的东西。

Answer 1

使用这样的自定义SerializationSchema：

stream.addSink(new RMQSink<ObjectNode>(
            connectionConfig,
            "stop",
            new SerializationSchema<ObjectNode>() {
                    @Override
                    public byte[] serialize( ObjectNode element ) {
                        return element.toString().getBytes();
                    }
            }
        ));