statefun-flink/statefun-flink-io-bundle/src/test/java/org/apache/flink/statefun/flink/io/kafka/GenericKafkaSinkProviderTest.java

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 * Licensed to the Apache Software Foundation (ASF) under one
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 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
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 * Unless required by applicable law or agreed to in writing, software
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package org.apache.flink.statefun.flink.io.kafka;

import static org.apache.flink.statefun.flink.io.testutils.YamlUtils.loadAsJsonFromClassResource;
import static org.hamcrest.CoreMatchers.instanceOf;
import static org.hamcrest.MatcherAssert.assertThat;

import org.apache.flink.shaded.jackson2.com.fasterxml.jackson.databind.JsonNode;
import org.apache.flink.statefun.flink.io.spi.JsonEgressSpec;
import org.apache.flink.statefun.sdk.io.EgressIdentifier;
import org.apache.flink.statefun.sdk.reqreply.generated.TypedValue;
import org.apache.flink.streaming.api.functions.sink.SinkFunction;
import org.apache.flink.streaming.connectors.kafka.FlinkKafkaProducer;
import org.junit.Test;

public class GenericKafkaSinkProviderTest {

  @Test
  public void exampleUsage() {
    JsonNode egressDefinition =
        loadAsJsonFromClassResource(getClass().getClassLoader(), "generic-kafka-egress.yaml");
    JsonEgressSpec<?> spec =
        new JsonEgressSpec<>(
            KafkaEgressTypes.GENERIC_KAFKA_EGRESS_TYPE,
            new EgressIdentifier<>("foo", "bar", TypedValue.class),
            egressDefinition);

    GenericKafkaSinkProvider provider = new GenericKafkaSinkProvider();
    SinkFunction<?> sink = provider.forSpec(spec);

    assertThat(sink, instanceOf(FlinkKafkaProducer.class));
  }
}