Examples with BroadcastConnectedStream org.apache.flink.streaming.api.datastream.BroadcastConnectedStream used on opensource projects

Example 1 with BroadcastConnectedStream

use of org.apache.flink.streaming.api.datastream.BroadcastConnectedStream in project flink by apache.

the class DataStreamTest method testFailedTranslationOnKeyed.

/**
 * Tests that with a {@link KeyedStream} we have to provide a {@link
 * KeyedBroadcastProcessFunction}.
 */
@Test
public void testFailedTranslationOnKeyed() {
    final MapStateDescriptor<Long, String> descriptor = new MapStateDescriptor<>("broadcast", BasicTypeInfo.LONG_TYPE_INFO, BasicTypeInfo.STRING_TYPE_INFO);
    final StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
    final DataStream<Long> srcOne = env.generateSequence(0L, 5L).assignTimestampsAndWatermarks(new CustomWmEmitter<Long>() {

        @Override
        public long extractTimestamp(Long element, long previousElementTimestamp) {
            return element;
        }
    }).keyBy((KeySelector<Long, Long>) value -> value);
    final DataStream<String> srcTwo = env.fromElements("Test:0", "Test:1", "Test:2", "Test:3", "Test:4", "Test:5").assignTimestampsAndWatermarks(new CustomWmEmitter<String>() {

        @Override
        public long extractTimestamp(String element, long previousElementTimestamp) {
            return Long.parseLong(element.split(":")[1]);
        }
    });
    BroadcastStream<String> broadcast = srcTwo.broadcast(descriptor);
    BroadcastConnectedStream<Long, String> bcStream = srcOne.connect(broadcast);
    expectedException.expect(IllegalArgumentException.class);
    bcStream.process(new BroadcastProcessFunction<Long, String, String>() {

        @Override
        public void processBroadcastElement(String value, Context ctx, Collector<String> out) throws Exception {
        // do nothing
        }

        @Override
        public void processElement(Long value, ReadOnlyContext ctx, Collector<String> out) throws Exception {
        // do nothing
        }
    });
}